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Stallcup's Illustrated Code Changes 2008
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GRAYBOY, Inc. 2007
Illustrated CodeChanges
Stallcups
2008
GRAYBOY, Inc. 2007
INSTALLATIONS UNDER THE EXCLUSIVECONTROL OF AN ELECTRIC UTILITY
SERVICE DROPS OR SERVICE LATERALS, AND ASSOCIATED METERING
LOCATED IN LEGALLY ESTABLISHED EASEMENTS, OR RIGHT-OF-WAYSDESIGNATED BY OR RECOGNIZED BY PUBLIC SERVICE COMMISSIONS,OR OTHER REGULATORY AGENCIES HAVING JURISDICTION FOR SUCHINSTALLATIONS
ON PROPERTY OWNED OR LEASED BY THE ELECTRIC UTILITY FORTHE PURPOSE OF COMMUNICATIONS, METERING, GENERATION,CONTROL, TRANSFORMATION, TRANSMISSION OR DISTRIBUTION OFELECTRIC ENERGY.
TRANSMISSION
DISTRIBUTION
GENERATION
WORKSPACE OSHA 1910.268(n)(12)(ii)
GROUND WIRELIGHT ON UTILITY POLEBELOW ATTACHMENTS NESC - 238
CATV LINE
TELECOMMUNICATIONSLINE
NOT COVERED90.2(B)(5)b
Purpose of Change: This revision clarifies that any agreements will be limited, other than a legally established easementor right-of-way, that a utility company can use to make installations that are outside the scope of the NEC.
1Ill.: pg. 1-2
NEC: pg. 21
GRAYBOY, Inc. 2007
L1N
L2 L3L1
N
L2 L3
L1 NL2
NEUTRAL SHALL BE GROUNDED
THIS 3-WIRE DC SYSTEM WITH NEUTRAL SHALL BE GROUNDED PER 250.162(B)
OCPD
TO DC POWER SOURCE
DC POWERSUPPLY
NEUTRAL CONDUCTORNEUTRAL POINT
ARTICLE 100
Purpose of Change: Two new definitions have been added to clarify what constitutes a neutral conductorand a neutral point.
2Ill.: pg. 1-22NEC: pg. 28
GRAYBOY, Inc. 2007
2000 by James G. Stallcup
QUALIFIED PERSON ARTICLE 100
DANGER-TESTINGBEING DONE
YELLOW TAPE USEDAS GUARD OR BARRIER
TEST OPERATORREADING INSTRUMENTS
QUALIFIED PERSON KNOWS CONSTRUCTION, OPERATION,AND HAZARDS OF EQUIPMENT
TRAINED, SKILLED, WITH KNOWLEDGETO RECOGNIZE AND AVOID HAZARDS
ELECTRICALEQUIPMENT
QUALIFIED PERSONARTICLE 100
Purpose of Change: This revision clarifies that qualified persons that have received safetytraining and knows how to recognize and avoid the hazards involved.
3Ill.: pg. 1-24NEC: pg. 29
GRAYBOY, Inc. 2007
PRESSURE
TWO DISKS WITH BOLT
OPENING IS REQUIRED TO BESEALED WITH ONEOF THE FOLLOWING:
BLANK TO COVERCB OPENING
PANELBOARD COVER
ENCLOSUREOR
BOX
UNUSED OPENINGS110.12(A)
Purpose of Change: This revision indicates all unused openings should be closed,except for those required for the proper mounting of such equipment or enclosure.
4Ill.: pg. 1-34NEC: pg. 33
GRAYBOY, Inc. 2007
FLASH PROTECTION110.16
Purpose of Change: This revision now clarifies that flash protection markings are required for large fusibleswitches and similar equipment where a flash hazard may exist.
5Ill.: pg. 1-36NEC: pg. 34
ELECTRICAL EQUIPMENTMUST BE MARKED INFIELD TO WARN WORKEROF AN ELECTRIC ARCFLASH
WORKER
QUALIFIEDPERSON
MARKING ONEQUIPMENTWARNS WORKEROF ARC FLASHHAZARD
NOTE 2: SEE ANSI Z535.4 FOR GUIDELINESPERTAINING TO DESIGNING SAFETY SIGNSAND LABELS TO PROVIDE WARNINGS, ETC.
NOTE 1: SEE NFPA 70E FOR ASSISTANCE INDETERMINING EXPOSURE, PLANNING SAFEWORK PRACTICES, AND SELECTING PERSONALPROTECTIVE EQUIPMENT.
SWITCHBOARDSPANELBOARDSINDUSTRIAL CONTROL PANELSMETER SOCKET ENCLOSURESMOTOR CONTROL CENTERSLARGE FUSIBLE SWITCHESSIMILAR ELECTRICAL EQUIPMENT
ELECTRICAL EQUIPMENT
LARGEFUSIBLE SWITCH
G
RAYB
OY,Inc.2007
GIVEN:APPENDIX, B-5.2 IN NFPA 70E
EMB = 1038.7 DB -1.4738 tA (.0093 F2 -.3453F + .59675)
DB = 18 INCHES tA = 1/2 CYCLE OR .0084 SEC. F = 35 kA MVA = 11
Step 1: EMB = (1038.7)(0.014125)(.0084)(11.3925
- 12.0855 + 5.9675)Step 2: EMB = (14.671638)(.0084)(5.2745)
Step 3: EMB = (14.671638)(.0443)
Step 4: EMB = 0.649954 cal/cm2
Solution:From Table 3-3.9.3 in Part II of NFPA 70E,
0.649954 cal/cm2 requires a hazard riskcategory of 0 with one layer of untreated
cotton (total weight oz/yd2 is 4.5-7).Note: This procedure is used only for 600 volts or lesssystems.
(Review NFPA 70E carefully)Step 5: Finding flash protection boundary
Dc = (53 x MVA x t)
Dc = (53 x 11 x .0084)
Dc = 2.21 ft.
Solution:Based on the given parameters, the authorssuggest an arc-flash boundary of 2.21 ftand an incident energy value of
0.649954 cal/cm2.
Note: Authors recommend that only engineers orqualified personnel calculate and determine the boundary.
APPLICATION OF FORMULA:APPENDIX B-5.2 IN PART II OF NFPA 70E
5.2Ill.: pg. 1-36NEC: pg. 34
GRAYBOY, Inc. 2007
WORKING SPACE
NOTE THAT THE WORKSPACE IS UNOBSTRUCTEDWITHOUT A COLUMN, ETC. BLOCKING ACCESSAND EXIT ROUTE. IN THIS CASE, SINGLE DOORENTRY IS PERMITTED PER 110.26(C)(2)(a).
PANIC HARDWAREON INSIDE OF DOOR
DOOR w/PANIC BARS,PRESSURE PLATES, ETC.
DOOR OPENSTOWARDS EGRESSOF ROOM
EXIT ROUTE
ELECTRICEQUIPMENT
WORKING SPACE 110.2(C)(3)
NEC CLEARANCES TABLE 110.26(A)(1)
(600 V OR LESS) TABLE 110.34(A)
(OVER 600 V) 110.26(F) 110.34(F)
FOR EQUIPMENT RATED 1200 A OR MORE AND OVER 6' WIDE (1.8 m) THERE SHALLBE ONE ENTRANCE AND EGRESS FROM AND NOT LESS THAN 24" (610 mm) WIDEAND 6' 6" (2 m) HIGH AT EACH END OR WORKSPACE SHALL BE DOUBLED.
SWITCHBOARD RATED 1200 A ORMORE AND OVER 6' WIDE (1.8 m)
EQUIPMENTLARGE
DOOR SHALL OPEN IN THEDIRECTION OF EGRESS IFLESS THAN 25' FROM THENEAREST EDGE OF THEWORKING SPACE AND BEEQUIPPED WITH PANICBARS, PRESSURE PLATE,OR OTHER DEVICES THATARE NOT NORMALLYLATCHED BUT OPEN UNDERSIMPLE PRESSURE.
25'
PERSONNEL DOORS110.26(C)(3)
Purpose of Change: This revision clarifies that the personnel door(s) shall have panic bars and similar equipmentand open in the direction of egress if located less than 25 ft from the nearest edge of the working space.
6Ill.: pg. 1-45NEC: pg. 37
GRAYBOY, Inc. 2007
BUILDING
GROUNDED CONDUCTORTERMINAL BAR 250.24(B)
EGC TERMINAL BAR 250.24(B)
LATERAL FROMMASTER METER
250 KCMIL cu.
MAIN BONDING JUMPER (MBJ) 250.24(B)
METAL WATERPIPE SYSTEMS 250.52(A)(1)
250 KCMIL cu. REQUIRES2 AWG cu. CONDUCTOR
MBJ IS 2 AWG COPPER
SIZING (MBJ) 250.24(B); 250.28(D); Table 250.66
GENERAL200.2
Purpose of Change: This new subsection clarifies that a busbar or conductor shall be used to makethe connection between the neutral bar and the equipment grounding terminal bar, not the metal ofthe enclosure.
7Ill.: pg. 2-2
NEC: pg. 43
GRAYBOY, Inc. 2007
CB DISCONNECT BOTH CIRCUITS1 AND 2 SIMULTANEOUSLY ORIGINATE FROM THE SAME
PANELBOARD 210.4(A) 210.4(B)
CIRCUIT 1SUPPLYINGEQUIPMENT
CIRCUIT 2SUPPLYINGEQUIPMENT
DEVICEBOX
GROUPING WIRE TIES OR
SIMILAR MEANS 210.4(D)
NOTE: GROUPING SHALL NOT APPLY IFTHE CIRCUIT ENTERS FROM A CABLEOR RACEWAY UNIQUE TO THE CIRCUITTHAT MAKES THE GROUPING OBVIOUS.
LINK ON RECEPTACLE CONNECTING UNGROUNDED(HOT) TERMINALS (BRASS COLOR) HAS BEEN BROKEN 210.4(B)
GROUPING210.4(D)
Purpose of Change: This new subsection requires grouping all the conductors of a multiwire branch circuit tohelp ensure that all ungrounded conductors are disconnected and grounded (neutral) conductor is de-energized,especially during service work.
8Ill.: pg. 2-6
NEC: pg. 45
GRAYBOY, Inc. 2007
IDENTIFICATION OF EACH PHASE OR LINE TERMINATIONS SPLICE POINTS CONNECTIONS 210.5(C)
3-CIRCUITS 480/277 V
A MEANS OF IDENTIFICATION OFUNGROUNDED CONDUCTORS SHALLBE POSTED AT EACH PANELBOARDOR DOCUMENTED IN A MANNER THATIS READILY AVAILABLE 210.5(C)
3-CIRCUITS 208/120 V
IDENTIFICATION OFSYSTEMS ANDCIRCUITS 480/277 V 208/120 V
PERMITTED METHODS OFIDENTIFICATION SEPARATE COLOR CODING MARKING TAPE TAGGING OTHER APPROVED MEANS 210.5(C)
UNGROUNDED CONDUCTORS210.5(C)
Purpose of Change: This revision clarifies that each ungrounded conductor of a branch circuit shall beidentified by phase or line and by system at all termination, connection, and splice points.
9Ill.: pg. 2-8
NEC: pg. 46
GRAYBOY, Inc. 2007
NOTE: WHERE RECEPTACLES ARE USED IN INDUSTRIAL ESTABLISHMENTS ONLY, GFCIPROTECTION ON RECEPTACLES SHALL NOT BE REQUIRED WHERE THE CONDITIONS OFMAINTENANCE AND SUPERVISION ENSURE THAT ONLY QUALIFIED PERSONNEL AREINVOLVED, THAT ARE LIMITED TO USE WITH EQUIPMENT QUALIFIED UNDER AN ASSUREDEQUIPMENT GROUNDING CONDUCTOR PROGRAM AS SPECIFIED IN 590.6(B)(2).
OUTDOORS 210.8(B)(4)
ALL NON-DWELLINGRECEPTACLE OUTLETSSHALL BE GFCI PROTECTED 210.8(B)(4)
A PUBLIC SPACE IS ANY SPACE THAT IS FOR USE BY,OR IS ACCESSIBLE TO, THE PUBLIC HAS BEEN DELETED.NOW APPLIES TO ALL 15- AND 20-AMPERE, 125 VOLTSINGLE-PHASE RECEPTACLES 210.8(B)(4)
OTHER THAN DWELLINGS210.8(B)(4)
Purpose of Change: This revision requires GFCI protection for all 15- and 20-ampere, 125-voltsingle-phase receptacles installed outdoors.
10Ill.: pg. 2-14NEC: pg. 47
GRAYBOY, Inc. 2007
AFCI NOT REQUIRED TO BEINSTALLED WITHIN 6' (1.8 m)OF BRANCH CIRCUIT OCPDsMEASURED ALONG CIRCUITCONDUCTORS 210.12(B), Ex. No. 1
AFCI
FLOORLAMP
CHAINLIGHT
FLUORESCENTFIXTURE
STEREO
DRESSERLAMPS
BEDLAMP
TELEVISIONTABLELAMP
METAL RACEWAY OR CABLEW/METALLIC SHEATH (DELETED) 210.12, Ex. - 2005 NEC
NOTE: AFCI PROTECTION FOR ALL 120-VOLT, SINGLE-PHASE, 15- AND 20-AMPERE BRANCH CIRCUITSSUPPLYING OUTLETS SHALL BE INSTALLED INDWELLING UNITS IN FAMILY ROOMS, DINING ROOMS,LIVING ROOMS, PARLORS, LIBRARIES, DENS,BEDROOMS, SUN ROOMS, RECREATION ROOMS,CLOSETS, HALLWAYS, OR SIMILAR ROOMS OR AREAS.
DWELLING UNITS210.12(B), Exception
Purpose of Change: This revision clarified that enclosing the 6 ft (1.8 m) of circuit conductors in a metalraceway or metallic-sheathed cable is not required.
11Ill.: pg. 2-18NEC: pg. 49
GRAYBOY, Inc. 2007
Purpose of Change: A new Exception No. 2 has been added to permit AFCI protectionto be omitted if the branch circuit to a fire alarm system is installed in RMC, IMC, EMT,or steel armored cable (Type AC).
DETECTORS
AFCI PROTECTIONNOT REQUIRED210.12(B), Ex. 2
WIRING METHOD RMC IMC EMT STEEL ARMORED CABLE
(TYPE AC) 210.12(B), Ex. 2 250.118
DWELLING UNITS210.12(B), Exception No. 2
PERMITTED BOXES METAL OUTLET METAL JUNCTION 210.12(B), Ex. 2
12Ill.: pg. 2-20NEC: pg. 49
GRAYBOY, Inc. 2007
NOTE: BALCONIES, DECKS, OR PORCHES WITH A USABLE AREA OF LESSTHAN 20 SQ. FT. ARE NOT REQUIRED TO HAVE A RECEPTACLE INSTALLED.
IllustrationsbyKristaDarnell'96
Grayboy&Assoc.
OVER 6' 6" (2 m) SHALL NOT BECONSIDERED TO BE ACCESSIBLE.(CHRISTMAS LIGHTRECEPTACLES)
IF BALCONY IS NOT ACCESSIBLE RECEPTACLE NOT REQUIRED 210.52(E)(3)
RECEPTACLE ON OPENFRONT PORCH REQUIRED 210.52(E)(3)
OUTDOOR OUTLETS210.52(E)(1) THRU (E)(3)
Purpose of Change: New subsection titles have been added for usability. A new subsection (3) has beenadded to require a receptacle be installed on any porch, deck, or balcony where accessible from inside thedwelling unit. A new Exception to (3) does not require a receptacle on a balcony, deck, or porch with a useablearea of less than 20 sq ft.
13Ill.: pg. 2-26NEC: pg. 54
GRAYBOY, Inc. 2007
SUBSTATION WITHFEEDER DISCONNECT
DISCONNECTING MEANS MORE THAN ONE SWITCH
OR CIRCUIT BREAKER COMBINE THE RATINGSTO DETERMINE THE OVERALLRATING OF THE DISCONNECTINGMEANS
225.39
SEPARATE BUILDING 2
PANEL
IDENTIFICATION 225.37
DISCONNECT CONSTRUCTION 225.38
ACCESSTO OCPDs 225.40
RATING OF DISCONNECT225.39
THE RATING SHALL NOT BE LOWER THAN: ONE-CIRCUIT INSTALLATION. NOT LESS THAN 15 AMPERES TWO-CIRCUIT INSTALLATIONS. NOT LESS THAN 30 AMPERES ONE-FAMILY DWELLING. NOT LESS THAN 100 AMPERES ALL OTHERS. NOT LESS THAN 60 AMPERES
Purpose of Change: This revision clarifies that the ratings of all switches or circuit breakers shall bepermitted to be combined to determine the overall rating of the disconnecting means.
14Ill.: pg. 2-39NEC: pg. 71
GRAYBOY, Inc. 2007
CABLE TRAY SHALL BE IDENTIFIED WITH
PERMANENTLY AFFIXED LABELSWITH THE WORDING SERVICE-ENTRANCE CONDUCTORS
LABEL SHALL BE VISIBLE AFTERINSTALLATION
READILY TRACEABLE THROUGH THEENTIRE LENGTH OF THE CABLE TRAY
230.44, Ex.
CABLE TRAY W/BARRIER 230.44, Ex.
SERVICE CONDUCTORSIN SINGLE LAYERS4/C - 350 KCMIL THHN cu.
OTHER THAN SERVICECONDUCTORS, STACKED5 - 4/C - 1/0 AWG THHN cu.INSTALLED PER ARTICLE 392
SOLIDFIXEDBARRIER 230.44, Ex.
CABLE TRAYS230.44, Ex.
Purpose of Change: This revision clarifies that service-entrance conductors installed in cable trays with otherthan service-entrance conductor shall be separated with a barrier and shall be identified with permanently affixedlabels on the cable tray that are readily traced through the entire length.
15Ill.: pg. 2-45NEC: pg. 77
GRAYBOY, Inc. 2007
PANEL
DISCONNECT CONSTRUCTION 225.38
ACCESSTO OCPDS 225.40
SEPARATE BUILDING 2
SERVICEDISCONNECT 230.205(A)
LOCATION230.205(A)
Purpose of Change: This revision clarifies that on private property, the service disconnectshall be permitted to be in a location that is not readily accessible, such as the top of a pole.
16Ill.: pg. 2-50NEC: pg. 82
GRAYBOY, Inc. 2007
DEFINITION OFCLASSIFICATION OF CIRCUITS 760.2
CONDUCTORS 760.82 TABLE 760.61 TABLE 760.82(I) 14 AWG cu. THWN
ALARM
CABLE
ACTIVATEEXTINGUISHER
CONTROL EQUIPMENTDOORS, FANS, ELEVATORS, ETC.
OCPDs AND LOCATION 760.23 760.24
CONDUIT
DETECTORS
NPLFA CONDUCTORS 16 AWG cu. TFFN
POWER LIMITS 760.15
TOPANEL
Step 1: Finding conductor A760.23; Table 310.16;14 AWG cu. = 20 A16 AWG cu. = 10 A
Step 2: Selecting OCPD for alarm circuitsTable 310.16; 760.23; 240.4(D)20 A (14 AWG cu.) requires 15 A OCPD10 A (16 AWG cu.) requires 10 A OCPD
Solution: The size OCPD for the 14 AWG TFFNcopper conductors is 15 amps and10 amps for the 16 AWG TFFNcopper conductors.
Sizing OCPD for fire alarm circuits
APPLYING 240.4(D)
SMALL CONDUCTORS240.4(D)
Purpose of Change: This revision adds small conductors in 18 AWG and 16 AWG sizes to correspond to thepermission to use these smaller conductors.
17Ill.: pg. 2-51NEC: pg. 84
GRAYBOY, Inc. 2007
APPLYING 240.21(C)(2)(4)
Step 1: Calculating primary FLA240.21(C)(2)(4)
A = 75 kVA 480 V x 1.732A = 75 kVA 831 V
A = 90 A
Step 2: Calculating primary size OCPD90 A x 125% = 112.5 A
Step 3: Finding primary size OCPD240.6(A)112.5 A requires 125 A
Step 4: Finding ratio240.21(C)(2)(4)
Ratio = 480 V / 208 VRatio = 2.31
Step 5: Calculating secondary FLA240.21(C)(2)(4)
A = 125 A OCPD x 2.31 ratioA = 288.75
Step 6: Sizing conductorsA = 288.75 A 10A = 28.875 A28.875 A requires 10 AWG cu.
Solution: The size THWN copper conductorsis at least 10 AWG copper andcant be longer than 10 ft.
Sizing primary OCPD
Sizing secondary conductors
SERVICE CONDUCTORS 230.42(A)(1)
OCPD 125 A
ONE CONDUCTORSHOWN FORSIMPLICITY
OCPD 240.21(C)(2)(4)
TRANSFORMER SECONDARY CONDUCTORSNOT OVER 3 m (10 FT) LONG
240.21(C)(2)(4)
TRANSFORMER 75 kVA 3 480 V PRI. 208Y/120 V SEC.
SECONDARY CONDUCTORS NOT OVER 10' (3 m) LONG 240.21(C)(2)
Purpose of Change: This revision clarifies that this section correlates with the conventional 10-foot tap rule in 240.21(B)(1).
18Ill.: pg. 2-53NEC: pg. 88
GRAYBOY, Inc. 2007
NOTE: INSTALLATION OF THE OVERCURRENTPROTECTION WITHIN A HAZARDOUS LOCATIONSHALL ALSO BE PERMITTED.
FUSE PROTECTION
CIRCUIT BREAKERPROTECTION
UPS WITH STORAGEBATTERIES
OCPD INSTALLED AS CLOSEDAS PRACTICABLE TO THEBATTERY TERMINALS PER240.21(H) AND 480.5.
BATTERY CONDUCTORS240.21(H)
Purpose of Change: A new subsection has been added to permit overcurrent protection to beinstalled as close as practicable to the storage battery terminals in a non-hazardous location.
19Ill.: pg. 2-57NEC: pg. 89
GRAYBOY, Inc. 2007
NOTE: FOR CALCULATED APPLICATIONS, THE ENGINEER SHALL ENSURE THAT THEDOWNSTREAM CIRCUIT BREAKER(S) THAT ARE PART OF THE SERIES COMBINATIONREMAIN PASSIVE DURING THE INTERRUPTION PERIOD OF THE LINE SIDE FULLYRATED, CURRENT-LIMITING DEVICE.
CB WITH A HIGHERAIC RATING 240.86
CB WITH A LOWER AICRATING 240.86
LOAD SIDE
SERIES COMBINATIONRATING SHALL BE MARKED 240.86(A)
MBJGES
GEC
FEEDER
EXISTING INSTALLATIONS ONLY
PROCESSINGEQUIPMENT
SELECTED UNDER ENGINEERING SUPERVISIONIN EXISTING INSTALLATIONS
240.86(A)
Purpose of Change: This revision clarifies that for calculated applications, the engineer shall ensure that the downstreamcircuit breaker(s) that are part of the series combination remain passive during the interruption period of the line sidefully rated, current-limiting device.
20Ill.: pg. 2-59NEC: pg. 92
GRAYBOY, Inc. 2007
MARKING:CAUTION - SERIES COMBINATION RATED _ AMPERES. REPLACEWITH:_ TYPE BREAKER_ TYPE FUSE
CB WITH A HIGHERAIC RATING 240.86
CB WITH A LOWER AICRATING 240.86
PROCESSINGEQUIPMENTLOAD SIDE
SERIES COMBINATIONRATING MUST BE MARKED 240.86(A)
MBJGES
GEC
SELECTED UNDER ENGINEERING SUPERVISIONIN EXISTING INSTALLATIONS
240.86(A)
Purpose of Change: This revision clarifies that specific markings must be readily visible for both theupstream and the downstream devices in series combination systems.
20.2Ill.: pg. 2-59NEC: pg. 92
GRAYBOY, Inc. 2007
OCPDUNDER SHORT CIRCUIT CONDITIONS,CONDUCTORS MUST NOT EXCEED THEIRSHORT CIRCUIT TEMPERATURE LIMITS
SORT CIRCUIT FORMULA FOR COPPER CONDUCTORS(I /A)t = 0.0297 LOG10 [(T2 + 234)(T1 + 234)]
SHORT CIRCUIT FORMULA FOR ALUMINUM CONDUCTORS(I /A)t = 0.0125 LOG10 [(T2 + 228)(T1 + 228)]
2 2
2 2
SHORT-CIRCUIT FORMULA VALUES I = SHORT-CIRCUIT CURRENT IN AMPERES A = CONDUCTOR ARE IN CIRCULAR MILS t = TIME OF SHORT-CIRCUIT IN SECONDS (FOR TIMES LESS THAN OR EQUAL TO 10 SECONDS) T1 = INITIAL CONDUCTOR TEMPERATURE IN DEGREES CELSIUS T2 = FINAL CONDUCTOR TEMPERATURE IN DEGREES CELSIUS COPPER CONDUCTOR WITH PAPER, RUBBER, VARNISHED CLOTH INSULATION, T2 = 200 COPPER CONDUCTOR WITH TERMOPLASTIC INSULATION, T2 = 250 COPPER CONDUCTOR WITH CROSS-LINKED POLYETHYLENE INSULATION, T2 = 250 COPPER CONDUCTOR WITH ETHYLENE PROPYLENE RUBBER INSUALTION, T2 = 250 ALUMINUM CONDUCTOR WITH PAPER, RUBBER, VARNISHED CLOTH INSULATION, T2 = 200 ALUMINUM CONDUCTOR WITH THERMOPLASTIC INSULATION, T2 = 150 ALUMINUM CONDUCTOR WITH CROSS-LINKED POLYETHYLENE INSULATION, T2 = 250 ALUMINUM CONDUCTOR WITH ETHYLENE PROPYLENE RUBBER INSULATION, T2 = 250
FEEDER TAPS240.92(B)
Purpose of Change: This new subsection will increase the enforceability necessary by the inspection communityand will limit the application of expanding feeder tap conductors for supervised industrial installations.
21Ill.: pg. 2-62NEC: pg. 92
GRAYBOY, Inc. 2007EBJ
250.102(D)
CONNECTION EGC
CLEANSURFACES 250.12
EGC
MBJ 250.28(D)
GROUND CLAMPSOR FITTINGSCONNECTING THEGEC TO THE RODMUST BE LISTEDFOR DIRECT BURIALAND PROTECTEDFROM PHYSICALDAMAGE
FITTING GEC
ROD
CONNECTION FOR GROUNDINGAND BONDING EQUIPMENT LISTED PRESSURE CONNECTORS TERMINAL BARS PRESSURE CONNECTORS LISTED AS
GROUNDING AND BONDING EQUIPMENT EXOTHERMAL WELDING PROCESS MACHINE SCREW-TYPE FASTENERSTHAT ENGAGE NOT LESS THAN TWOTHREADS OR ARE SECURED WITH A NUT
THREAD-FORMING MACHINE SCREWS THAT ENGAGE NOT LESS THAN TWO THREADSIN THE ENCLOSURE
CONNECTIONS THAT ARE PART OF A LISTEDASSEMBLY
OTHER LISTED MEANS 250.8(A)
NOTE: CONNECTION DEVICES OR FITTINGS THATDEPEND SOLELY ON SOLDER SHALL NOT BE USED.
CONNECTION OF GROUNDING AND BONDING EQUIPMENT250.8(A); (B)
SELF-TAPPINGSCREWS WITHAT LEAST TWOTHREADS
Purpose of Change: This revision clarifies the permitted methods for connections of grounding and bonding equipment.
22Ill.: pg. 2-66NEC: pg. 97
GRAYBOY, Inc. 2007
SERVICECONDUCTORS
MAKE UP BOX
METER BASESERVICE PANEL
TRANSFER SWITCH GROUNDED CONDUCTOR NOT
SOLIDLY INTERCONNECTEDTO THE SERVICE GROUNDEDCONDUCTOR
250.20(D)
GENERATOR SEPARATELY DERIVED
SYSTEM SHALL BE GROUNDED 250.20(D) 250.30(A)
TO LOAD
TO SEPARATELYDERIVED SYSTEM
TO SERVICEEQUIPMENT
NEUTRAL NOTSOLIDLY GROUNDED
CLASSIFIED AS A SEPARATELY DERIVED SYSTEM
TO LOAD
TO GENERATOR NOT SEPARATELY
DERIVED SYSTEM
TO SERVICEEQUIPMENT
NEUTRALSOLIDLY GROUNDED
NOT CLASSIFIED AS A SEPARATELY DERIVED SYSTEM
SEPARATELY DERIVED SYSTEMS250.20(D)
Purpose of Change: This revision clarifies that a separately derived systems shall be grounded where transfer equipment isprovided that includes switching the grounded conductor and where the grounded conductor is not solidly interconnectedto the service supplied grounded conductor.
23Ill.: pg. 2-70NEC: pg. 98
GRAYBOY, Inc. 2007
UTILITYMETER
MAY BE CONNECTEDGROUNDING ELECTRODEHERE 250.24(A)(1) 250.66
GEC SIZED PER 250.66 250.24(D)
LOAD SIDE PANELCONTAINING CBs
SUPPLY SIDE 250.142(A)
GROUNDED(NEUTRAL)CONDUCTOR 250.24(C)(1) 250.24(C)(2) 250.24(D)
TO BRANCH-CIRCUITSOR FEEDER-CIRCUITSWITH PHASE CONDUCTORS 250.142(B)
SERVICEPANELMAIN OCPD
MAY BECONNECTED TO GROUNDINGELECTRODE HERE 250.24(A)(1) 250.66
TO UTILITY XFMR NESC - RULE 92(B)(1)
GROUNDEDCONDUCTOR
GROUNDING ELECTRODE CONDUCTOR250.24(D)
Purpose of Change: This revision clarifies that the grounding electrodeconductors shall be sized in accordance with 250.66.
23Ill.: pg. 2-76NEC: pg. 99
GRAYBOY, Inc. 2007 UNGROUNDED (PHASE) CONDUCTORS 700 KCMIL cu. THWN PARALLELED 3 TIMES
AUXILIARY GUTTER ARTICLE 366
GROUNDING ELECTRODECONDUCTOR MAY BE SPLICED TO BUSBARAND GROUNDED (NEUTRAL)CONDUCTOR
250.64(C), Ex.
UNGROUNDED(PHASE) CONDUCTORS 250 KCMIL 2 cu. BONDING JUMPER 250.64(D) 250.66
GROUNDING ELECTRODECONDUCTOR 3/0 AWG cu. 250.66 TABLE 250.66
PANEL1
PANEL2
PANEL3
PANEL4
PANEL5
PANEL6
MAIN BONDING JUMPER 2 AWG cu. 250.66 TABLE 250.66
NOTE: ONE LINE DRAWN FOR SIMPLICITY
SIZE250.28(D)(1) THRU (D)(3)
Purpose of Change: This revision clarifies how to size main bonding jumpers for services with more than oneenclosure and to size system bonding jumpers for separately derived systems with more than one enlcosure.
24Ill.: pg. 2-78
NEC: pg. 100
GRAYBOY, Inc. 2007
NOTE: THE GEC IS SIZED FROMTABLE 250.66 PER 250.32(E).
BUILDING 2 GROUNDED (NEUTRAL)CONDUCTOR USED ASNEUTRAL AND EGC 250.32(B), Ex.
MAIN SWITCHGEARBUILDING
OCPD 225 A
TO BUILDING
RMC w/RIGIDELBOW
GROUNDED NEUTRAL
PVC
FEEDER W/NEUTRAL 4 AWG cu.
GROUNDED SYSTEMS250.32(B) AND EXCEPTION
EXISTING PREMISES ONLY
Step 1: Calculating neutral load220.61(A); 225.3(B); 310.15(B)(4)(c)50 A x 100% = 50 A
Step 2: Sizing neutral250.32(B), Ex.; Table 310.1650 A requires 8 AWG cu.
Step 3: Sizing neutral to be used as EGC250.32(B), Ex.; Table 250.122225 A OCPD requires 4 AWG cu.
Solution: The grounded neutral conductor must be4 AWG THNN copper to serve as an EGC.
WHAT SIZE NEUTRAL IS REQUIRED?
Purpose of Change: This revision clarifies that the grounded (neutral) conductor for other buildings or structures supplied by feedersor branch circuits shall be permitted to be used as the equipment grounding conductor for existing premises wiring system only.
25Ill.: pg. 2-86
NEC: pg. 102
GRAYBOY, Inc. 2007
NOTE 2: THE EQUIPMENT GROUNDING CONDUCTOR ON THELOAD SIDE OF EACH GENERATOR OVERCURRENT DEVICESHALL BE SIZED IN ACCORDANCE WITH 250.102(D) BASED ONTHE RATING OF THE OVERCURRENT DEVICE SUPPLIED.
NOTE 1: THE EQUIPMENT BONDING JUMPER ON THE SUPPLYSIDE OF EACH GENERATOR OVERCURRENT DEVICE SHALL BESIZED IN ACCORDANCE WITH 250.102(C) BASED ON THE SIZEOF THE CONDUCTORS SUPPLIED BY THE GENERATOR.
SERVICECONDUCTORS
MAKE UP BOX
METER BASESERVICE PANEL
TRANSFER SWITCH GROUNDED CONDUCTOR
SOLIDLY INTERCONNECTEDTO THE SERVICE GROUNDEDCONDUCTOR
250.20(D)
PERMANENTLY INSTALLEDGENERATOR NON- SEPARATELY
DERIVED SYSTEM 250.20(D) 250.30(A)
TO LOAD
TO SEPARATELYDERIVED SYSTEM
TO SERVICEEQUIPMENT
NEUTRAL NOTSOLIDLY GROUNDED
CLASSIFIED AS A SEPARATELY DERIVED SYSTEM
PERMANENTLY INSTALLED GENERATORS250.35(A) AND (B)
Purpose of Change: A new section had been added to address the installation of equipment bondingjumpers and equipment grounding conductors for permanently installed generators that are not separatelyderived systems.
26Ill.: pg. 2-88
NEC: pg. 103
GRAYBOY, Inc. 2007
UNGROUNDED (PHASE) CONDUCTORS 250 KCMIL THWN cu. 230.42(A)(1)
SLAB ANDFOUNDATION
STRUCTURAL STEEL (GES) 250.52(A)(2) TABLE 250.66
GROUND RING 2 AWG cu. 30" (750 mm) DEEP 250.52(A)(4) 250.66(C) 250.53(F)
METAL FRAME OF THE BUILDING OR STRUCTURE250.52(A)(2)
GROUNDINGELECTRODECONDUCTOR 2 AWG cu.
EXOTHERMICWELD
Purpose of Change: This revision clarifies that the structural steel shall be permitted to serve as agrounding electrode if connected to the reinforcing bars of a concrete encased electrode or ground ring.
27Ill.: pg. 2-92
NEC: pg. 105
GRAYBOY, Inc. 2007
C
SERVICE PANELUNGROUNDED (PHASE)CONDUCTORS 250 KCMIL THWN cu. 230.42(A)(1)
OUTSIDEGRADE SLAB
GEC 4 AWG cu. 250.52(A)(3) 250.66(B)
REBAR STEEL AT LEAST20' (6 m) OR MORE IN LENGTH
OR4 AWG COPPER CONDUCTORAT LEAST 20' (6 m) IN LENGTH 250.52(C)(3)
CEE GES 250.52(A)(3)
GEC CONNECTED TO A CONCRETE -ENCASED ELECTRODE (UFERGROUND)
REINFORCINGREBAR INFOOTING
MBJ
GROUNDED (NEUTRAL)CONDUCTOR
EBJ 250.102(C) TABLE 250.122
CONCRETE PILING FORROOF OVERHANG HASREBAR BUT DOESNT REQUIRECONNECTION IF REBAR INBUILDING FOOTING IS USED
CONCRETE-ENCASED ELECTRODE250.52(A)(3)
Purpose of Change: This revision clarifies that it shall be permissible to bond only one concrete-encased electrode(CEE) into the grounding electrode system (GES) where multiple concrete electrodes are present. This change alsopermits the concrete-encased electrode to be located horizontally near the bottom of the footing or vertically wherefoundation or footing is in direct contact with the earth.
28Ill.: pg. 2-94
NEC: pg. 105
GRAYBOY, Inc. 2007
GEC 250.66(A)
FINISHEDGRADE
UNGROUNDED (PHASE)CONDUCTORS 4/0 AWG THWN cu. 230.42(A)(1)
MBJ
DRIVENROD 250.52(A)(5)
EBJ
DRIVEN ROD 5/8" (15.67 mm) STAINLESS STEEL COPPER-COATED STEEL ZINC-COATED STEEL 250.52(A)(5)(b)
LISTED 1/2" DIAMETER STAINLESS STEEL COPPER-COATED STEEL ZINC-COATED STEEL
ROD AND PIPE ELECTRODES250.52(A)(5)
Purpose of Change: This revision clarifies that rod and pipe electrodes can be stainless steel, copper, orzinc-coated steel if at least 5/8 inch in diameter or not smaller than 1/2 inch in diameter if listed.
29Ill.: pg. 2-96
NEC: pg. 105
GRAYBOY, Inc. 2007
BUSBARAUXILIARY GUTTER ARTICLE 366
COMMON GEC W/O SPLICE 3/0 AWG cu. 250.64(D)(1) TABLE 250.66
TAP CONDUCTORS 4/0 AWG THWN cu. 250.64(D)(1) 250.66
TAPPED GECs 2 AWG cu. TABLE 250.66
GE SBS
4 - 600 KCMIL IN PARALLEL PER PHASE THWN cu. CONDUCTORS
FUTURE USE
Given for CGEC:4-600 kcmil in parallel per 310.4
Solution: Table 250.66600 kcmil x 4 = 2400 kcmil3/0 AWG cu. common GEC required.
Given for Tap Conductors:4/0 AWG THWN cu. per phase
Solution: Table 250.664/0 AWG cu.2 AWG GEC taps required.
NOTE: FOR SIMPLICITY, ONLY ONE SET OF THEPARALLEL CONDUCTORS IS SHOWN.
SERVICE WITH MULTIPLE DISCONNECTING MEANS ENCLOSURES250.64(D)(1) THRU (D)(3)
Purpose of Change: This revision clarifies the sizing and installation requirements for the groundingelectrode conductor where multiple disconnecting enclosures are installed.
30Ill.: pg. 2-102NEC: pg. 107
GRAYBOY, Inc. 2007
BOLTED, RIVETED, OR WELDED
SERVICEEQUIPMENT
MECHANICALMEANS NUT AND BOLT 250.68(A), Ex. 2
WHEN CONNECTED TO FIRE-PROOFED STRUCTURALMETAL, THIS CONNECTION IS NOT REQUIRED TO BEACCESSIBLE PER 250.68(A), Ex. 2.
CEE
GEC
ACCESSIBILITY250.68(A), Ex. 2
Purpose of Change: This revision clarifies that the mechanical means, such as a nut and bolt,used to connect irreversible compression connectors to the metal structure is not required to beaccessible.
31Ill.: pg. 2-106NEC: pg. 108
GRAYBOY, Inc. 2007
NOTE 1: THE EGC SHALL BE: CONTINUOUS GREEN COLOR, OR CONTINUOUS GREEN COLOR WITH ONE OR MORE YELLOW STRIPES
EGCCONDUCTORS CONTAINED WITHIN THE SAME
RACEWAY, CABLE, CORD, OR
OTHERWISE RUN WITH THE BRANCH-CIRCUIT CONDUCTORS
NOTE 2: EGCs LARGER THAN 6 AWG cu. ARE NOT REQUIRED TO BEMARKED WHEN IN CONDUIT BODIES THAT CONTAIN NO SPLICES ORUNUSED HUBS PER 250.119(A)(1), EXCEPTION.
CONDUITBODY
IDENTIFICATION SHALL ENCIRCLE THE CONDUCTOR 250.119(A)(2)
CONDUCTORS LARGER THAN 6 AWG250.119(A)
LARGER THAN 6 AWG
Purpose of Change: This revision clarifies that the identification of the equipment groundingconductor (EGC), larger than the 6 AWG, shall encircle the conductor at the termination.
32Ill.: pg. 2-120NEC: pg. 115
GRAYBOY, Inc. 2007
GECGES
GROUNDING 392.7 TABLE 392.7(B)
ASSOCIATEDFITTINGS SHALLBE IDENTIFIED 392.3
BONDING 392.7(B)(4)
MULTIPLE CIRCUITS250.122(C)
NOTE: SINGLE CONDUCTORS USED AS EQUIPMENTGROUNDING CONDUCTORS SHALL BE INSULATED,COVERED, OR BARE, AND THEY SHALL BE 4 AWGOR LARGER.
Purpose of Change: This revision clarifies that where a single equipment groundingconductor is run with multiple circuits in the same cable tray, the equipment groundingconductor must be sized for the largest OCPD protecting conductors in the cable tray andmust meet the minimum requirements in 392.3(B)(1)(c).
33Ill.: pg. 2-121NEC: pg. 116
GRAYBOY, Inc. 2007
EXAMPLE
THE RATING OF THE OCPDPROTECTING THE CIRCUITCONDUCTORS IS 20 AMPS.
SIZING EBJTABLE 250.12220 A REQUIRES 12 AWG cu.
NEUTRAL
EBJ 250.146
HOT
SWITCH BOX METAL
CONNECTING RECEPTACLE GROUNDINGTERMINAL TO BOX
250.146
Purpose of Change: This revision clarifies that the sizing of the equipment bondingjumper (EBJ) from the box to the receptacle is based on Table 250.122 for the ratingof the branch circuit overcurrent protective device.
34Ill.: pg. 2-124NEC: pg. 119
GRAYBOY, Inc. 2007NOTE: RIGID METAL CONDUIT AND INTERMEDIATE METAL CONDUITSHALL NOT BE REQUIRED TO COMPLY WITH 300.4(E).
ROOF DECKING METAL-CORRUGATED
CABLES ROUTED ALONG SIDE OFRAFTERS NOT LESS THAN 1 1/2"(38 mm) FROM THE ROOF DECKING. 300.4(E)
CABLES RUN ACROSS RAFTERS WITHGUARD STRIPS NOT LESS THAN 1 1/2"(38 mm) FROM THE NEARESTSURFACE OF THE ROOF DECKING.
CABLES ROUTED ALONGSIDE OF JOISTS
CABLES ROUTED ACROSSTOP OF JOISTS WITHGUARD STRIPS USED FORSUPPORTS
CABLES ROUTED NOT LESS THAN1 1/2" (38 mm) THROUGH JOISTS WITHRUNNING BOARD
CABLES AND RACEWAY INSTALLEDUNDER ROOF DECKING
300.4(E)
Purpose of Change: A new subsection has been added to required at least 1 1/2 in. clearance for a cable- or raceway-typewiring method to be installed in exposed or concealed locations under metal-corrugated sheet roof decking.
35Ill.: pg. 3-2
NEC: pg. 128
GRAYBOY, Inc. 2007
SECABLE
PANELBOARD 408.16(A), Ex. 1
HANDHOLE ENCLOSURE INTERIOR CONSIDERED
A WET LOCATION 300.5(B)
HANDHOLE ENCLOSURE 314.30(A) - (D)
RACEWAY INTERIOR CONSIDERED A WET LOCATION 300.9
RACEWAY INTERIOR CONSIDERED
A WET LOCATION 300.5(B)
INSULATED CONDUCTORSAND CABLES LISTED FOR USE IN
WET LOCATIONS 300.5(B) 300.9
RACEWAYS IN WET LOCATIONS ABOVE GRADE300.9
Purpose of Change: A new section has been added to clarify that the interior of enclosures or racewaysshall be considered to be a wet location if installed in wet locations above grade. All insulated conductorsand cables shall be listed for use in wet locations.
36Ill.: pg. 3-8
NEC: pg. 131
GRAYBOY, Inc. 2007
Purpose of Change: A new exception has been added to clarify that raceways and cables shall not berequired to be mechanically secured to the equipment where installed into the bottom of open bottomequipment.
MECHANICAL CONTINUITY - RACEWAYS AND CABLES300.12, Ex. 2
8" 10"
RACEWAYS
FITTINGS
3" (75 mm)OR LESS TABLE 408.5
BUSBAR INSULATED TABLE 408.5
BUSBAR NONINSULATED TABLE 408.5
CLEARANCE 8" (200 mm) TABLE 408.5
CLEARANCE 10" (250 mm) TABLE 408.5
OPENBOTTOM
FLOOR STANDING SWITCHBOARDS, PANELBOARDS,OR SIMILAR ENCLOSURES
RACEWAYS OR CABLES NOT REQUIRED TO BE MECHANICALLY
SECURED TO THE EQUIPMENT 300.12, Ex. 2
37Ill.: pg. 3-9
NEC: pg. 132
GRAYBOY, Inc. 2007
GRADE
MIN.BURIALDEPTHS
30" (750 mm) FOR OVER 600 V TO 22 kV CIRCUITS36" (900 mm) FOR OVER 22 kV TO 40 kV CIRCUITS42" (1000 mm) FOR CIRCUITS OVER 40 kV
WARNING RIBBON
12" (300 mm)MINIMUM
30" (750 mm) TOP OF CONDUIT
MINIMUM COVERa REQUIREMENTSTABLE 300.50d
Purpose of Change: A new superscript d has been added to Table 300.50 to require direct-buried cables that are notconcrete-encased, protected by concrete or sleeved with proper protection and are buried at least 30 in. (750 mm) ormore below grade must have location identified by warning ribbon that is installed in the trench at least 12 in. (300mm) above the cables.
38Ill.: pg. 3-13
NEC: pg. 137
GRAYBOY, Inc. 2007
NOTE: FEDERAL AVIATION ADMINISTRATION(FAD) ADVISORY CIRCULARS (ACS) PROVIDEADDITIONAL PRACTICES AND METHODS FORAIRPORT LIGHTING.
AIRFIELD LIGHTING SERIES CIRCUITS 310.7, Ex. 2 AND FPN TO Ex. 2
5 kV SHIELDED CABLE POWERED BY REGULATORS 310.7, Ex. 2 AND FPN TO Ex. NO. 2
DIRECT BURIAL CONDUCTORS310.7, Exception No. 2 AND FPN TO EXCEPTION NO. 2
Purpose of Change: A new exception and FPN has been added to clarify that ungrounded airfieldlighting series circuits may be unshielded where rated up to 5000 volts and powered by regulators.
39Ill.: pg. 3-14
NEC: pg. 139
GRAYBOY, Inc. 2007
CB
ORSWITCH
ROOF
EMT ON ROOF 100 F
DISCONNECTING MEANS W/UNIT 440.14
CONDUCTORS 10 THWN cu.
DISTANCE ABOVEROOF TO BOTTOMOF CONDUIT 3" OUTSIDE AMBIENT 100F ADDED TEMPERATURE OF 40F
TO 100F = 140F FOR RACEWAY
WHAT IS THE AMPACITY OF THE 10 AWG THWN COPPERCONDUCTOR?
FINDING AMPACITY OF CONDUCTOR
STEP 1: FINDING A OF CONDUCTOR110.14(C); TABLE 310.1610 AWG THWN = 35 A
STEP 2: FINDING DERATING FACTORTABLE 310.16; TABLE 310.15(B)(2)(c)OUTSIDE TEMPERATURE = 100 FDISTANCE ABOVE ROOF (3") = 40 FTOTAL = 140 F
140 F REQUIRES 58%
STEP 3: CALCULATING AMPERE VALUE OF CONDUCTOR35 A x 58% = 20.3 A
SOLUTION: THE 10 AWG THWN COPPER CONDUCTORIS LIMITED TO 20.3 AMPS.
CONDUITS EXPOSED TO SUNLIGHT ON ROOFTOPS310.15(B)(2)(c)
Purpose of Change: A new subdivision has been added to require an additional ambient temperature to be applied forconduits exposed to sunlight on rooftops.
40Ill.: pg. 3-16
NEC: pg. 146
GRAYBOY, Inc. 2007
120/240 VOLTS, 3-WIRE, SINGLE-PHASEDWELLING SERVICES AND FEEDERS
310.15(B)(6)
FEEDER CONDUCTORS SUPPLYING LIGHTING ANDAPPLIANCE BRANCH-CIRCUIT PANELBOARD INSIDEOF DWELLING UNIT COMPLY 4 AWG THWN cu. (PHASES) 8 AWG THWN cu. (NEUTRAL) TABLE 310.15(B)(6) 310.15(B)(6)
SERVICE-ENTRANCECONDUCTORS 400 KCMIL THWN cu.
INDIVIDUAL DWELLING UNITS IN AMULTIFAMILY DWELLING COMPLEX 310.15(B)(6)
MAIN FEEDER-CIRCUITTO EACH APARTMENT 310.15(B)(6)
LOAD IN EACH APARTMENT 90 A PER PHASE
(PHASE-TO-PHASE PLUS NEUTRAL) 40 A PER NEUTRAL REQUIRES 100 AMP SERVICE TABLE 310.15(B)(6)
Purpose of Change: This revision clarifies that the main power feeder can be the feeder(s) between themain disconnect and the panelboards (Loads associated with the dwelling unit).
41Ill.: pg. 3-20
NEC: pg. 147
GRAYBOY, Inc. 2007
DEVICE BOX
COIL OR LOOP OF CONDUCTORSMUST BE COUNTED TWICE 314.16(B)(1)
NOTE: THE CALCULATION PROCEDURE IS WHERE A LOOP ORCOIL IS TWICE THE MINIMUM LENGTH REQUIRED FOR FREECONDUCTORS PER 300.14 AND SHALL BE COUNTED TWICE.
CONDUCTOR FILL314.16(B)(1)
Purpose of Change: This revision clarifies that each loop or coil of conductors shall be counted twice.
42Ill.: pg. 3-24
NEC: pg. 168
GRAYBOY, Inc. 2007
20 A CBs
MAIN
DIRECTORY 110.22 230.70(B) 408.4
2 GANG = 4 CONDUCTOR ALLOWANCE
6 AWG cu. CONDUCTORS4 x 5.00 in.3 = 20 in.3 FOR DEVICE PLUSCONDUCTOR ALLOWANCE FOR EACHCONDUCTOR IN BOX
DEVICE OR EQUIPMENT FILL314.16(B)(4)
Purpose of Change: This revision clarifies that a device or utilization equipment wider than a single (2 in.)device box shall have double volume allowance provided for each gang.
43Ill.: pg. 3-26
NEC: pg. 168
GRAYBOY, Inc. 2007
CONDUCTORS LARGER THAN 4 AWG BOXES SHALL BE IDENTIFIED FOR
THEIR SPECIFIC FUNCTION 314.24(C)(2)CONDUCTORS 8, 6, OR 4 AWG BOXES SHALL HAVE AN INTERNAL
DEPTH THAT IS NOT LESS THAN2 1/16" (52.4 mm)
314.24(C)(3)
CONDUCTORS 12 OR 10 AWG BOXES SHALL HAVE AN INTERNAL
DEPTH THAT IS NOT LESS THAN1 3/16" (30.2 mm)
WHERE THE EQUIPMENT PROJECTS REARWARDFROM THE MOUNTNG PLANE OF THE BOX BYMORE THAN 1" (25 mm), THE BOX SHALL HAVEA DEPTH NOT LESS THAN THAT OF THE EQUIPMENTPLUS 1/4" (6 mm)
314.24(C)(4)CONDUCTORS 14 AWG AND SMALLER BOXES SHALL HAVE A DEPTH THAT IS NOT LESS
THAN 15/16" (23.8 mm) 314.24(C)(5)
F I R E
DEPTH OF BOX SHALL NOT BE LESS
THAN THE DEPTH OFTHE EQUIPMENT PLUS 1/4" (6 mm)
314.24(C)(1)MOUNTINGPLATE
DEPTH PROJECTS MORE THAN
1 7/8" REARWARD FROMTHE MOUNTING PLATE
314.24(C)(1)
MINIMUM DEPTH OF BOXES FOR OUTLETS, DEVICES,AND UTILIZATION EQUIPMENT
314.24(A) THRU (C)
Purpose of Change: The rewrite provides requirements for the installation of large switches, receptacles, andutilization equipment into outlet and device boxes.
44Ill.: pg. 3-28
NEC: pg. 172
GRAYBOY, Inc. 2007
BRANCH CIRCUITSPECIAL LISTED OUTLETBOX CAN SUPPORT ALUMINAIRE WEIGHING MORETHAN 50 LBS. (23 kg) LISTED AND MARKED FOR THE
MAXIMUM WEIGHT TO BESUPPORTED
LISTED BOX SUPPORTINGLUMINAIRE MINIMUM50 LBS. (23 kg) 314.27(A)
CEILING CHANDELIER
LAMPS
BOXES AT LUMINAIRE OUTLETS314.27(A) AND (B)
Purpose of Change: This revision clarifies the requirements for listed boxes used for luminaire support.
45Ill.: pg. 3-30
NEC: pg. 172
GRAYBOY, Inc. 2007
NOTE: UTILIZATION EQUIPMENT HEAVIER THAN 50 LBS. SHALL BESUPPORTED INDEPENDENT OF THE OULET BOX, UNLESS LISTEDFOR GREATER WEIGHT.
OUTLET BOX SUPPORT OF UTILIZATION EQUIPMENT MEETS
314.27(A) AND (B) REQUIREMENTS OTHER THAN CEILING-SUSPENDED (PADDLE) FANS 314.27(E)
UTILIZATION EQUIPMENT 50 LBS OR LESS MOUNTED TO OUTLET BOXES, NOT DEVICE BOXES
OULET BOX NOT WEIGHING
MORE THAN 6 LBS (3 kg) AT LEAST 2 - #6 OR
LARGER SCREWS 314.27(E), Ex.
UTILIZATION EQUIPMENT314.27(E) AND Ex.
Purpose of Change: A new subsection and exception have been added to address the installation requirements forutilization equipment used with outlet boxes.
46Ill.: pg. 3-32
NEC: pg. 173
GRAYBOY, Inc. 2007
LUMINAIRE 210.70(C)
SWITCH 210.70(C)
NM CABLE RUN THROUGH BORED
HOLES OR ON RUNNING BOARDS 334.15(C)
CRAWL SPACEENTRANCE 210.70(C)
HVAC EQUIPMENT
CRAWL SPACE
ATTIC 210.70(C)
IN UNFINISHED BASEMENTS AND CRAWL SPACES334.15(C)
Purpose of Change: This revision clarifies that NM cable shall be protected in crawl spaces.
47Ill.: pg. 3-44
NEC: pg. 186
GRAYBOY, Inc. 2007
CORD-AND-PLUGCONNECTEDAPPLIANCES 210.8(A)(5), Ex. 1
BASEMENT ORCRAWL SPACE UNFINISHED
LIGHTING OUTLET 210.70(A)
NM CABLE (SECURED) WITHIN 12" (300 mm)
OF THE POINT WHERETHE CABLE ENTERSTHE TUBING OR CONDUIT
334.15(C)
EMT(SUPPORTED) NM CABLE SHEATH
SHALL EXTEND THROUGH CONDUIT OR TUBINGINTO THE OUTLET OR DEVICE BOX NOT LESSTHAN 1/4" (6 mm)
334.15(C)
NOTE: METAL CONDUIT, TUBING, AND METALOUTLET BOXES SHALL BE CONNECTED TO ANEQUIPMENT GROUNDING CONDUCTOR.
IN UNFINISHED BASEMENT AND CRAWL SPACES334.15(C)
Purpose of Change: This revision clarifies the installation requirements for NM cable in an unfinishedbasement or crawl space where the NM cable is installed in a conduit or tubing for protection.
48Ill.: pg. 3-46
NEC: pg. 186
GRAYBOY, Inc. 2007
WOOD FRAMING IS FIRE- ORDRAFT-STOPPED USING THERMALINSULATION, CAULK, OR SEALINGFOAM PER 334.80.
CABLES
CABLES WITH CURRENT-CARRYING CONDUCTORSARE INSTALLED, WITHOUTMAINTAINING SPACINGBETWEEN CABLES 334.80
CONDUCTORS TABLE 310.15(A)(2)(a)
EACH CABLE HAS TWO OR MORECURRENT-CARRYING CONDUCTORS 334.80
APPLY THE ADJUSTMENTFACTORS FOR EACH CONDUCTOR 310.15(B)(2)(a)
NOTE: THE PROVISIONS OF310.15(A)(2), Ex. DOES NOTAPPLY.
AMPACITY334.80
Purpose of Change: This revision clarifies that where more than two NM cables containing two or more current-carryingconductors are installed, without maintaining spacing between cables, the provisions of 310.12(A)(2), Ex. shall not apply.The term bundled has been deleted since the use of bundled caused a lot of controversy as to what constitutedbundled conductors. The term caulk was added since it is a common method of fire or draft stopping.
49Ill.: pg. 3-48
NEC: pg. 187
GRAYBOY, Inc. 2007
NOTE: IMC SHALL BE PERMITTED TO BE UNSUPPORTED WHERE THERACEWAY IS NOT MORE THAN 18 IN. (450 mm) IN LENGTH ANDREMAINS IN UNBROKEN LENGTHS (WITHOUT A COUPLING).
DEVICE (RECEPTACLE) 314.23 342.30(C)
THREADED HUB ORTHREADED ENCLOSURE 314.23
H
N
METER
SERVICEEQUIPMENT 230.70(A) - (C)
THREADED HUB ORTHREADED ENCLOSURE 314.23
SERVICE-ENTRANCECONDUCTORS
18" (450 mm)OR
LESS
UNSUPPORTED RACEWAYS342.30(C)
Purpose of Change: A new subsection has been added to permit IMC to be unsupported where the raceway isnot more than 18 in. (450 mm) in length and remains in unbroken lengths (without a coupling), where oversized,concentric or eccentric knockouts are not encountered.
50Ill.: pg. 3-57
NEC: pg. 192
GRAYBOY, Inc. 2007
CINDER FILL GALVANIZED STEEL,
STAINLESS STEEL, ANDRED BRASS RMC
ATMOSPHERIC CONDITIONS AND OCCUPANCIES ALL GALVANIZED STEEL AND STAINLESS STEEL RMC RED BRASS RMC FOR DIRECT BURIAL AND SWIMMING
POOL APPLICATIONS ALUMINUM RMC WHERE JUDGED SUITABLE FOR THE
ENVIRONMENT 344.10(A)(1) - (A)(4)
CORROSIVE ENVIRONMENTS GALVANIZED STEEL, STAINLESS STEEL, AND RED BRASS
RMC, ELBOWS, COUPLINGS, AND FITTINGS SHALL BEPERMITTED TO BE INSTALLED IN CONCRETE, IN DIRECTCONTACT WITH THE EARTH, OR IN AREAS SUBJECT TOCORROSIVE INFLUENCES WHERE PROTECTED BYCORROSION PROTECTION AND JUDGED SUITABLE FORTHE CONDITION
ALUMINUM RMC SHALL BE PROVIDED WITH APPROVEDSUPPLEMENTARY CORROSION PROTECTION
344.10(B)(1); (B)(2)
USES PERMITTED344.10(A) THRU (C)
Purpose of Change: This revision clarifies the uses permitted for galvanized, stainless, red brass,and aluminum RMC and the requirements for additional corrosion protection where necessary.
51Ill.: pg. 3-59
NEC: pg. 193
GRAYBOY, Inc. 2007
BRICKFMC NOT PERMITTED INSTALLED IN
WET LOCATION
SUPPORTS RECEPTACLEBOX
USES NOT PERMITTED348.12(1)(1)
Purpose of Change: This revision clarifies that FMC shall not be permitted to be installed in any wet locations.
52Ill.: pg. 3-63
NEC: pg. 195
GRAYBOY, Inc. 2007
Purpose of Change: A new article has been added for reinforced thermosetting resin conduit (Type RTRC).
REINFORCED THERMOSETTINGRESIN CONDUIT: TYPE RTRC
ARTICLE 355
TYPE RTRC CONDUIT WITH ASSORTEDFITTINGS PER ARTICLE 355
LISTING REQUIREMENTS 355.6
USES PERMITTED 355.10
SIZE 355.20
NUMBER OF CONDUCTORS 355.22
CONSTRUCTION 355.100
NUMBER OF BENDS 355.26
JOINTS 355.48
SPLICES AND TAPS 355.56
MARKING 355.120
GROUNDING 355.60
THIS NEW ARTICLE IS DIVIDED INTO THREE PARTS:
PART I GENERALPART II INSTALLATIONPART III CONSTRUCTION SPECIFICATIONS
USES NOT PERMITTED 355.12
53Ill.: pg. 3-76
NEC: pg. 203
GRAYBOY, Inc. 2007
COVERS SECURELY FASTENED 376.100(D)
SMOOTHLY ROUNDED EDGES SUITABLE BUSHINGS SHIELDS FITTINGS HAVING SMOOTH
ROUNDED EDGES 376.100(C)
ELECTRICAL ANDMECHANICALCONTINUITY 376.100(A)
SUBSTANTIALCONSTRUCTION A COMPLETE ENCLOSURE SUITABLY PROTECTED
FROM CORROSION CORNER JOINTS SHALL
BE MADE TIGHT 376.100(B)
CONSTRUCTION376.100(A) THRU (D)
Purpose of Change: A new section has been added for the construction requirements of a wireway.
54Ill.: pg. 3-92
NEC: pg. 220
GRAYBOY, Inc. 2007NOTE: CONCEALABLE NONMETALLIC EXTENSIONS AND ASSOCIATED FITTINGS AND DEVICES SHALL BE LISTED.
OUTER INSULATOR GROUNDING CONDUCTOR G1
INSULATOR GROUNDED (NEUTRAL) CONDUCTOR H1
INSULATOR UNGROUNDED (PHASE) CONDUCTOR H
INSULATOR GROUNDED (NEUTRAL) CONDUCTOR N2
OUTER INSULATOR GROUNDING CONDUCTOR G2
CONCEALABLE NONMETALLIC EXTENSION
PROTECTIVE LAYERED FLATWIRE
STARTING/SOURCE TAP DEVICE SUPPLEMENTARY OVERCURRENT PROTECTION GFCI-PROTECTION MISWIRE PROTECTION ARC IGNITION PROTECTION 382.6
LOADSIDE EXTENSIONSAND DEVICES 382.6
LISTING REQUIREMENTS382.6
Purpose of Change: New sections have been added to address the listing requirements for concealablenonmetallic extensions and associated fittings and devices.
55Ill.: pg. 3-94
NEC: pg. 223
GRAYBOY, Inc. 2007
Purpose of Change: A new subsection has been added to address the installationrequirements for multipole snap switches.
MULTIPOLE SNAP SWITCHES404.8(C)
MULTIPOLE SNAP SWITCH LISTED MARKED AS TWO-CIRCUIT
OR THREE-CIRCUIT SWITCH404.8(C)
SUPPLIED BY MORETHAN ONE CIRCUIT 404.8(C)
NOTE 2: WHERE USING TWO CIRCUITS ON A SINGLE MULTIPOLE SWITCH,COMPLIANCE WITH 210.7(B) IS NECESSARY.
NOTE 1: MULTIPOLE SNAP SWITCHES SHALL ALSO BE PERMITTED IN THISTYPE OF APPLICATION WHERE THE RATING IS NOT LESS THAN THE NOMINALLINE-TO-LINE VOLTAGE OF THE SYSTEM SUPPLYING THE CIRCUITS.
56Ill.: pg. 4-6
NEC: pg. 256
GRAYBOY, Inc. 2007
NOTE: ENCLOSURE IS EQUIPPED WITH IDENTIFIED, SECURELY INSTALLEDBARRIERS BETWEEN ADJACENT DEVICES.
BARRIER 406.4(G) 404.8(B)
120 VOLTRECEPTACLE 406.4(G)
SWITCHES 404.8(B)
480 V
VOLTAGE BETWEEN ADJACENT DEVICES406.4(G)
BARRIER 404.8(B)
277 VOLTPHASE A
277 VOLTPHASE B
120-VOLTCIRCUIT
Purpose of Change: A new subsection has been added to address the hazard for receptacles, switches,and other devices where the voltage exceeds 300 volts between adjacent devices.
57Ill.: pg. 4-10
NEC: pg. 260
GRAYBOY, Inc. 2007
TYPES OF RECEPTACLE
5-15 5-20 6-15 6-20
SEE ANSI/NEMAWD 6-2002
TYPICAL DAMPLOCATION
TYPICAL WETLOCATION
DAMP LOCATIONS406.8(A)
NONLOCKINGRECEPTACLES LISTED WEATHER-
RESISTANT TYPE 406.8(A)
ALL NONLOCKINGRECEPTACLES LISTEDWEATHER-RESISTANTTYPE
Purpose of Change: This revision provides requirements that all nonlocking 15- and 20-ampere, 125- and250-volt receptacles must be a listed weather-resistant type.
58Ill.: pg. 4-12
NEC: pg. 260
GRAYBOY, Inc. 2007
RECEPTACLE WEATHERPROOF
ENCLOSURE 406.8(B)(1), Ex.
15- AND 20-AMPERE, 125- THROUGH 250-VOLTRECEPTACLES IN A WET LOCATION
406.8(B)(1), Ex.
Purpose of Change: A new exception has been added to permit receptacles installed in wetlocations subject to high pressure spray washing to have an enclosure that is weatherproofwhen the attachment plug is removed.
59Ill.: pg. 4-14
NEC: pg. 261
GRAYBOY, Inc. 2007
TAMPER-RESISTANT RECEPTACLE LOCATIONS
KITCHEN BATHROOMS FAMILY ROOM OUTDOORS LIVING ROOM LAUNDRY PARLOR BASEMENTS LIBRARY GARAGES DEN HALLWAYS SUNROOM BEDROOMS RECREATION ROOM
SINK
OVE
N
REF.SPACE
ISLAND
KITCHEN
PANTRYDINING ROOM
BREAKFAST ROOM
GFCI
DW
RECEPTACLES TAMPER-RESISTANT
TAMPER-RESISTANT RECEPTACLES IN DWELLING UNITS406.11
Purpose of Change: A new section has been added to require tamper-resistant receptacles in dwellingunits for locations specified in 210.52.
60Ill.: pg. 4-16
NEC: pg. 261
GRAYBOY, Inc. 2007
WEATHERHEAD 230.54
SERVICE DROP 230.23
POINT OFATTACHMENT 230.26 UTILITY
TRANSFORMER 3 = 240 V/120 V
HIGH LEG HIGH LEG =
208 V TO GROUND
SERVICE EQUIPMENT 230.70(A) - (C)
METER BASE 90.2(B)(5)
HIGH-LEG COLORED ORANGE OR OTHER SUITABLE MEANS
HIGH-LEG (HL) IS PHASE B THE CENTER LEG LEGIBLY AND PERMANENTLY
FIELD-MARKED CAUTION ___ PHASE HAS ___
VOLTS TO GROUND 408.3(F) 230.66
230.56 215.8 408.3(E)
HIGH-LEG B-PHASE
HIGH-LEG B-PHASE
HIGH-LEG IN PANEL B-PHASE ORANGE
NEC LOOP
HIGH-LEG IDENTIFICATION408.3(F)
HIGH-LEG (HL) IS PHASE CIN SELF-CONTAINEDMETER BASE
Purpose of Change: A new subsection has been added to require the high-leg to be legibly and permanentlyfield-marked in the switchboard or panelboard.
61Ill.: pg. 4-18
NEC: pg. 262
GRAYBOY, Inc. 2007
INDIVIDUAL PROTECTIONNOT REQUIRED PROTECTED ON ITS
SUPPLY SIDE 408.36, Ex. 2
OCPD PANELBOARD MORE THAN
42 OCPDs 408.36, Ex. 2
CB COUNTINGPROCEDURE
SP COUNTS AS 1DP COUNTS AS 23P COUNTS AS 3
SINGLE MAIN DISCONNECTIN ONE ENCLOSURE 230.71(A) 408.36
PANELS WITH MAINCBs
TWO TO SIX DISCONNECTSIN SINGLE OR SEPARATE ENCLOSURES 408.36, EX. 1 230.71(A)GROUPING 230.72(A)
PANEL WITH MAIN CBFUSED DISCONNECT
OVERCURRENT PROTECTION408.36, Ex. 1 AND Ex. 2
NOT LIMITED TO 42 CIRCUITS
Purpose of Change: This revision clarifies the permitted methods for providing protection of a panelboardand deletes the definition of power panelboards and lighting and appliance branch circuit panelboards.
62Ill.: pg. 4-22
NEC: pg. 263
GRAYBOY, Inc. 2007
SP COUNTS AS 1DP COUNTS AS 23P COUNTS AS 3
CB COUNTINGPROCEDURE
15 A 20 A
15 A 20 A
15 A
15 A 20 A
20 A
2PCB
SPCB
DPCB
PANELBOARD DESIGNED, RATED, AND LISTED FOR
THE MAXIMUM NUMBER OFOVERCURRENT DEVICES
408.54
MAXIMUM NUMBER OF OVERCURRENT DEVICES408.54
Purpose of Change: The maximum number of overcurrent devices that a panel was designed, rated,and listed to contain has been relocated to Part IV dealing with construction of panelboards.
63Ill.: pg. 4-25
NEC: pg. 264
GRAYBOY, Inc. 2007
NOTE 2: LUMINAIRES LOCATED IN THIS ACTUAL DIMENSIONOF TUB OR SHOWER AND WITHIN 8 FEET SHALL BE MARKEDFOR DAMP OR MARKED FOR WET LOCATIONS WHERE SUB-JECT TO SHOWER SPRAY.
NOTE 1: NO CORD, CHAIN, OR CABLE TYPE LUMINAIRESSHALL BE INSTALLED PER 410.10(D).
BATHTUB
VERTICAL
LUMINAIRE
8' (2.5 m)
VERTICAL ACTUAL OUTSIDE DIMENSION
OF THE BATHTUB OR SHOWER 410.10(D)
MUST BE MARKEDDAMP OR WET
BATH AND SHOWER AREAS410.10(D)
Purpose of Change: This revision clarifies that the luminaires located within the actual outside dimension of thebathtub or shower to a height of 8 ft. (2.5 m) vertically from the top of the bathtub rim or shower threshold to bemarked damp or if subject to shower spray, marked wet location.
64Ill.: pg. 4-32
NEC: pg. 268
GRAYBOY, Inc. 2007
RECESSEDINCANDESCENT,
FLUORESCENT, OR LEDLUMINAIRES
12" MIN
6" MIN
SOLIDLENS
24"
NEC 410.8(D)(3); (4)ST
OR
AGE
AREA
SURFACE-MOUNTEDINCANDESCENT OR
LED LUMINAIRES
SURFACE-MOUNTEDFLUORESCENT
LUMINAIRES
12" MIN 12" MIN
SHELF
24" 24"
SHELF12" MIN 6" MIN
NEC 410.8(D)(1) NEC 410.8(D)(2)
ENCLOSEDTYPE
STO
RAG
EAR
EA
UN
OBS
TRU
CTE
DTO
FLO
OR
STO
RAG
EAR
EA
SURFACE-MOUNTEDFLUORESCENT OR LED
LUMINAIRES
NEC 410.8(D)(5)
STO
RAG
EAR
EA
SHELF
IDENTIFIEDFOR THIS USE
LUMINAIRES IN CLOTHES CLOSETS410.16(D)(1) THRU (D)(5)
CLOTHING RODSURFACE-MOUNTEDFLUORESCENTIDENTIFIED FORTHIS USE
Purpose of Change: This revision clarifies the installation requirements for surface-mounted incandescent,fluorescent, or LED luminaires, and surface-mounted fluorescent or LED luminaires identified for the use whereinstalled within the storage space.
65Ill.: pg. 4-34
NEC: pg. 269
GRAYBOY, Inc. 2007
INCANDESCENTLIGHTS 410.130(G)
DOESNT APPLY
FLUORESCENTLIGHTS
MULTIWIRE BRANCH CIRCUITS 410.130(G)
LOCKOUT/TAGOUTOF SWITCH NFPA 70E
PERSONNEL REPLACINGDEFECTIVE BALLAST 410.130(G), Ex. 5
DISCONNECTING MEANS EXTERNAL TO LUMINAIRE SHALL BE A SINGLE DEVICE LOCATED IN SIGHT OF LUMINAIRE SHALL SIMULTANEOUSLY BREAK ALL THE
SUPPLY CONDUCTORS OF THE BALLAST,INCLUDING THE GROUNDED (NEUTRAL) CONDUCTOR
410.130(G)
BALLAST
DISCONNECTING MEANS410.130(G)
Purpose of Change: This revision clarifies that the disconnecting means for multiwire branch circuits shallsimultaneously break all the supply conductors of the ballast, including the grounded (neutral) conductor.
66Ill.: pg. 4-40
NEC: pg. 275
GRAYBOY, Inc. 2007
NOTE: THE LUMINAIRES, POWER SUPPLY,AND LUMINAIRE FITTINGS (INCLUDINGTHE EXPOSED BARE CONDUCTORS) OFAN EXPOSED BARE CONDUCTOR LIGHT-ING SYSTEM SHALL BE LISTED FOR THEUSE AS PART OF THE SAME IDENTIFIEDLIGHTING SYSTEM.
ASSEMBLY OF LISTED PARTS
LOW VOLTAGE LUMINAIRES LOW VOLTAGE LUMINAIRE POWER SUPPLY CLASS 2 POWER SUPPLY LOW VOLTAGE LUMINAIRE FITTINGS CORD (SECONDARY CIRCUIT) THAT THE LUMINAIRES AND POWER SUPPLY
ARE LISTED FOR USE WITH CABLE, CONDUCTORS IN CONDUIT, OR OTHER FIXED WIRING METHOD FOR
THE SECONDARY CIRCUIT
LIGHTING SYSTEMS RATED AT 30 VOLTS OR LESSSHALL BE LISTED AS A COMPLETE SYSTEM. 411.3BRANCH-CIRCUIT SHALLBE 20 A OR LESS
210.19(A) 210.20(A) 411.6
PRIMARY SECONDARY SEC. CIRCUITS 411.2
ISOLATINGTRANSFORMER 411.3
LAMPSONE OR MORESECONDARYCIRCUITS
ISOLATEDPOWERSUPPLY 30 V OR LESS 411.3
411.3 110.3(B) 90.7 ARTICLE 100
LOAD OF SECONDARY CIRCUIT 25 A OR LESS 411.2
NEC LOOP
LISTING REQUIRED411.3(A); (B)
Purpose of Change: This revision clarifies that the various types of lighting systems operating at 30 volts or less are either alisted low voltage lighting system or a lighting system assembled from listed parts.
67Ill.: pg. 4-46
NEC: pg. 278
GRAYBOY, Inc. 2007
OLDER VENDING MACHINE MANUFACTURED OR REMANUFACTURED
PRIOR TO JANUARY 1, 2005 SHALL BE CONNECTED TO GFCI-PROTECTED OUTLET 422.51
VENDING MACHINE SELF-SERVICE DEVICE THAT DISPENSES
PRODUCTS OR MERCHANDISE WITHOUT THENECESSITY OF REPLENISHING THE DEVICEBETWEEN EACH VENDING OPERATION
DESIGNED TO REQUIRE INSERTION OF ACOIN, PAPER CURRENCY, TOKEN, CARD,KEY, OR RECEIPT OF PAYMENT BYOTHER MEANS
422.51
CORD-AND-PLUG CONNECTED VENDING MACHINES422.51
Purpose of Change: This revision clarifies that older vending machines manufactured or remanufacturedbefore January 1, 2005, must be connected to a GFCI-protected outlet.
68Ill.: pg. 4-52
NEC: pg. 283
GRAYBOY, Inc. 2007
Step 1: Finding FLA430.6(A)(1); Table 430.25050 HP = 65 A
Step 2: Finding percentage430.52(C)(1), Ex. 2(c); Table 430.52Max. size = 400%
Step 3: Calculating max. size430.52(C)(1), Ex. 2(c)Max. size = 65 A x 400% = 260 A
Step 5: Selecting inverse time circuit breaker240.6(A)Max. size = 250 A
Solution: The maximum size inverse time circuitbreaker is 250 amps.
INVERSE TIME CIRCUIT BREAKER
INVERSE TIMECIRCUIT BREAKER 430.52(C)(1), Ex. 2(c)
OLs 430.32(A)(1) 430.32(C) 430.35
CB 430.52(C)(1) TABLE 430.52 240.4(G) 240.6(A)
NONFUSEDDISCONNECT 430.110(A)
50 HP MOTOR3, 460 VDESIGN B
NAMEPLATE 62 A
ORGEC
GES
MBJ
IN ACCORDANCE WITH TABLE 430.52430.52(C)(1), Ex. 2
Purpose of Change: This revision clarifies that where the rating specified in Table 430.52 or the ratings modified by ExceptionNo. 1 is not sufficient for the starting current of the motor, the Exception No. 2 shall be permitted to be applied.
69Ill.: pg. 4-61
NEC: pg. 310
GRAYBOY, Inc. 2007
ALTERNATEPOWER SOURCE
SWITCHBOARD SEPARATE VERTICAL
SECTIONS 700.9(B)(5)(a)
SERVICEEQUIPMENT
NORMALPOWERSOURCE
GENERATOR 445.19(1)
TRANSFEREQUIPMENT
EMERGENCY NORMALLEGALLYREQUIREDSTANDBY
70Ill.: pg. 4-82
NEC: pg. 335
GRAYBOY, Inc. 2007
ALTERNATEPOWER SOURCE WIREWAY
SERVICEEQUIPMENT
NORMALPOWERSOURCE
GENERATOR 445.19(2)
TRANSFEREQUIPMENT
EMERGENCY NORMALLEGALLYREQUIREDSTANDBY
SEPARATE ENCLOSURES 700.9(B)(5)(b)
GENERATORS SUPPLYING MULTIPLE LOADS445.19
Purpose of Change: A new section has been added to provide requirements for a single generatorsupplying more than one load or multiple generators operating in parallel.
70.2Ill.: pg. 4-82
NEC: pg. 335
GRAYBOY, Inc. 2007
FACILITY SITE HAS RESTRICTED PUBLIC ACCESS.
QUALIFIED PEOPLESERVICE EQUIPMENT
FACTORY ELBOWAND MARKED WITH - XWASSOCIATED FITTINGS
SUPERVISIONON SITE
ENCLOSURE #2 FACTORY SEALED
CLASS 1, DIVISION 2INDUSTRIALESTABLISHMENT
FACTORY SEALEDENCLOSURE #1
RTRC WITH FACTORY ELBOWSAND ASSOCIATED FITTINGSMARKED WITH SUFFIX - XW
SCH. 80 PVC CONDUIT WITHFACTORY ELBOWS ANDASSOCIATED FITTINGS.
WIRING METHOD CAN BE
CLASS I, DIVISION 2501.10(B)(7)
Purpose of Change: To permit reinforced thermosetting resin conduit (RTRC) and Schedule 80 PVC incorrosion areas where RMC does not provide adequate corrosion resistance.
71Ill.: pg. 5-9
NEC: pg. 363
GRAYBOY, Inc. 2007
WIRINGMETHODS RMC IMC MI CABLE MC/HL CABLE
FMC OR LFMC DOES NOTCOMPLY WITH Ex. TO501.30(B) IN CLASS I,DIVISION 1 INSTALLATIONS
LISTEDFITTINGS
FMC OR LFMC SHALL NOT BEUSED AS THE SOLE G-FCP. EBJSHALL BE INSTALLED PER 250.102.
TYPES OF EQUIPMENT GROUNDING CONDUCTORS501.30(B)
CLASS I, DIVISION 1 AND 2
Purpose of Change: To clarify the use of flexible metal conduit (FMC) and liquidtightflexible metal conduit (LFMC) as an equipment grounding conductor in classifiedlocations.
72Ill.: pg. 5-12
NEC: pg. 367
GRAYBOY, Inc. 2007
NOTE 2: SINGLE-COMPONENTSTORED ENERGY SOURCES WITH: WELL-DEFINED PARAMETERS
SUCH AS SMALL CAPACITORSAND INDUCTORS CAN BE SIMPLEAPPARATUS
NOTE 3: FOR OVERALL SAFETY OFTHE SYSTEM, THE VALUES OFSUCH COMPONENTS SHALL BE
NOTE 1: THE TERM BE HASBEEN DELETED FROM THE FPN.
FUSE RESISTOR
ENERGY PATH TO GROUNDUNDER FAULT CONDITION
ZENERDIODE
HAZARDOUSLOCATION
NON-HAZARDOUSLOCATION
GES
INTRINSICALLY SAFECIRCUIT LOOP
SIMPLE APPARATUS504.2
Purpose of Change: To include single components in simple circuits well-defined parameters.
73Ill.: pg. 5-26
NEC: pg. 381
GRAYBOY, Inc. 2007
BARRIER
GES
RACEWAY
CABLES
CABLE TRAY
NOTE 1: IF PASSING THROUGH A DIVISION 2 OR ZONE 2LOCATION INTRINSICALLY SAFE AND NONINCENDIVE FIELDWIRING CIRCUITS CAN BE RUN IN THESE WIRING METHODS.
CLASS I, DIVISION 2(CI, D2) LOCATION
RACEWAY, CABLETRAY OR CABLE 504.30(A)(1), Ex. 3
INTRINSICALLY SAFECIRCUITS AND NONINCENDIVECIRCUITS ROUTED TOGETHER
HAZARDOUS LOCATION SAFE AREA
NOTE 2: WIRINGMETHODS AREPASSING THROUGHCLASS I, DIVISION 2LOCATION.
NOTE 3: NONINCENDIVE FIELDWIRING CIRCUITS ARE DESCRIBEDIN: 501.10(B)(3) 502.10(B)(3) 503.10(B)(3) 505.15(C)(1)(g) AND 506.15(C)(7)SEE FPN TO 504.30(A)(1), Ex. 4
FROM NONINTRINSICALLY SAFE CIRCUIT CONDUCTORS504.30(A)(1), Ex. 3
Purpose of Change: To provide requirements for running intrinsically safe circuits (ISCs) and nonincendive (NCCS) circuits together.
74Ill.: pg. 5-28
NEC: pg. 382
GRAYBOY, Inc. 2007NOTE: SEALS SHALL BE IDENTIFIED FOR THE PURPOSE OF MINIMIZING PASSAGEOF GASES, VAPORS, OR DUST UNDER NORMAL OPERATING CONDITIONS.
HAZARDOUS LOCATION 504.70 TABLE 514.3(B)(1)
NONHAZARDOUS LOCATION
READOUT PANELWITH BARRIERS
SEAL 514.9(B)
SEAL 504.70
SEALS 504.70 514.9(A)
SEALS ARE NOT REQUIREDTO BE EXPLOSIONPROOFOR FLAMEPROOF 504.70
POWER-CIRCUIT 430.22(A)
INTRINSICALLYSAFE CIRCUIT 504.2
SEALING504.70
Purpose of Change: This revision clarifies that seals do not have to be explosionproof or flameproof.
75Ill.: pg. 5-32
NEC: pg. 383
GRAYBOY, Inc. 2007
DEDICATED VENTILATIONAND EXHAUST SYSTEM
AIRCRAFT HANGAR
SPRAYING
DIPPINGPROCESS
TANK
COATINGPROCESS
EXHAUST DUCT
NOTE: AN AIRCRAFT HANGERCONSTRUCTED FOR THE EXPRESSPURPOSE OF:
SPRAY COATING DIPPING
MUST BE PROVIDED WITH
DEDICATED VENTILATIONSUPPLY AND
EXHAUST BASED ON DEFINITIONIN 513.2
AIRCRAFT PAINTING HANGER513.2
Purpose of Change: To include requirements for painting processes in aircraft hangars.
76Ill.: pg. 5-52
NEC: pg. 407
GRAYBOY, Inc. 2007
10' 5'
5'5'
5'
ALSO, SEENFPA 33
5' ABOVE ENGINEENCLOSURE AND WING 513.3(C)
5' FROM FUELTANK IN WINGS 513.3(C)
SPRAY OPERATIONS IN AIRCRAFT HANGARCONSTRUCTED LIKE A HUGE PAINT BOOTH 513.3(C)(2)
VICINITY OF AIRCRAFT513.3(C)(2)
Purpose of Change: To include requirements for large aircraft hangars constructed like a paint booth.
77Ill.: pg. 5-53
NEC: pg. 408
GRAYBOY, Inc. 2007
TASK ILLUMINATION BATTERY CHARGER FORBATTERY POWERED LIGHTS AND SELECTEDRECEPTACLES FOR GENERATOR SET ANDTRANSFER SWITCH LOCATIONS
ALARM AND ALERTING SYSTEMS(1) FIRE ALARMS(2) ALARMS REQUIRED FOR SYSTEMS USED
FOR THE PIPING OF NONFLAMMABLEMEDICAL GASES
(3) MECHANICAL CONTROL, AND OTHERACCESSORIES REQUIRED FOR EFFECTIVELIFE SAFETY SYSTEMS OPERATION
GENERATOR SET ACCESSORIES
THE FOLLOWING SHALL BE PERMITTED TO BECONNECTED TO THE LIFE SAFETY BRANCH:
LIFE SAFETY BRANCH517.32(C); (E); (F)
Purpose of Change: There revisions clarify the items permitted to be connected to the life safety branch.
78Ill.: pg. 5-58
NEC: pg. 433
GRAYBOY, Inc. 2007
COLOR CODEGREEN, GREEN WITHYELLOW STRIPE 517.13(B) 517.18(B) 517.19(B)(2)
GROUNDED (N) SLOTLONG SLOT
SILVER TERMINAL (N)
COLOR CODE ORANGE WITH A
DISTINCTIVECOLORED STRIPEOTHER THAN WHITE,GREEN, OR GRAY
517.160(A)(5)(1)
UNGROUNDED (PHASE) SLOTSHORT SLOT
BRASS TERMINAL (H)
COLOR CODE BROWN WITH A
DISTINCTIVE COLOREDSTRIPE OTHER THANWHITE, GREEN, OR GRAY
517.160(A)(5)(2)GREENTERMINAL
CONDUCTOR IDENTIFICATION517.160(A)(5)
Purpose of Change: This revision clarifies that striped isolated conductors providesproper identification for isolated power systems.
79Ill.: pg. 5-62
NEC: pg. 442
GRAYBOY, Inc. 2007
PART III - CONTROL CIRCUIT WIRING METHODS
522.20522.21522.22522.23522.24
522.25522.28
CONDUCTORS, BUSBARS, AND SLIP RINGSCONDUCTOR SIZINGCONDUCTOR AMPACITYOVERCURRENT PROTECTION FOR CONDUCTORSCONDUCTORS OF DIFFERENT CIRCUITS IN THE SAME CABLE, CABLE TRAY, ENCLOSURE,OR RACEWAYUNGROUNDED CONTROL CIRCUITSCONTROL CIRCUITS IN WET LOCATIONS
PART II - CONTROL CIRCUIT
522.10 POWER SOURCES FOR CONTROL CIRCUITS
ARTICLE 522 - CONTROL SYSTEMS FOR PERMANENT AMUSEMENT ATTRACTIONS
PART I - GENERAL
SECTION HEADING
SCOPEDEFINITIONSOTHER ARTICLESVOLTAGE LIMITATIONSMAINTENANCE
SECTION
522.1522.2522.3522.5522.7
CONTROL SYSTEMS FOR PERMANENTAMUSEMENT ATTRACTIONS
ARTICLE 522
Purpose of Change: A new article has been added to address the requirements for control systems forpermanent amusement attractions.
80Ill.: pg. 5-68
NEC: pg. 453
GRAYBOY, Inc. 2007
NOTE: WHERE MORE THEN FIVE CIRCUITS WITHOUT A LISTED ENERGY MANAGEMENT SYSTEMARE EMPLOYED, A 50-AMPERE 120/240 VOLT POWER SUPPLY ASSEMBLY AND A MINIMUM 50-AMPERE RATED DISTRIBUTION PANELBOARD SHALL BE USED PER 551.42(D).
DISTRIBUTION PANELBOARDS 120 VOLTS MAXIMUM 120/240 VOLTS MAXIMUM
LISTED FOR 30 AMP APPLICATIONS 551.42(C)
ELECTRICAL SYSTEM 120 VOLTSMAXIMUM TWO TO FIVE 15 OR 20 AMPERE 551.42(C)
POWER SUPPLY 30 AMPERE 551.42(C)
TWO TO FIVE 15- OR 20-AMPERE CIRCUITS551.42(C)
Purpose of Change: This revision clarifies that a 120 volt or 120/240 volt rated distribution panelboards shall bepermitted with a 30 amp power supply assembly.
81Ill.: pg. 5-84
NEC: pg. 479
GRAYBOY, Inc. 2007
LIQUIDPIPING
ELECTRICALEQUIPMENT
WIRING METHODAND CONDUIT
DISPENSINGUNIT
ON SHOREGENERAL 555.21(A)CLASSIFICATION OF CLASS I,DIVISION 1 AND 2 AREAS 555.21(B)CLOSED CONSTRUCTION 555.21(B)(1)(a); (b)OPEN CONSTRUCTION 555.21(B)(2)(a); (b)
CLASSIFICATION OF CLASS I, DIVISION 1 AND 2 AREAS555.21(B)(1); (B)(2)
Purpose of Change: To include requirements to provide coverage of open and closed constructionmethods for docks, marinas, and piers.
82Ill.: pg. 5-90
NEC: pg. 501
GRAYBOY, Inc. 2007
SPORTSTORE
SHOESTORE
CLOTHESSTORE
BEAUTYSALON
DRUGSTORE
SECTION SIGN 600.2
SECTION SIGNS SHALL BE MARKEDTO INDICATE THAT FIELD-WIRINGAND INSTALLATION INSTRUCTIONSARE REQUIRED
1 5
ELECTRIC SIGN SECTION
OF
1 5
ELECTRIC SIGN SECTION
2 5
ELECTRIC SIGN SECTION
3 5
ELECTRIC SIGN SECTION
4 5
ELECTRIC SIGN SECTION
5 5
ELECTRIC SIGN SECTION
OF
OF
OF
OF
OF
SUBASSEMBLIES
SECTION SIGNS600.4(C)
Purpose of Change: A new section has been added to require section signs to be marked toindicate that field-wiring and installation instructions are required.
83Ill.: pg. 6-4
NEC: pg. 504
GRAYBOY, Inc. 2007
DRIVE THRU
ACCESS DOORWAY 3' x 2' (900 mm x 600 mm)PERMANENT WALKWAY 600.21(E)
LIGHTING OUTLET CONTAINING A SWITCH
OR CONTROLLED BY AWALL SWITCH
600.21(E)
ATTIC AND SOFFIT LOCATIONS600.21(E)
Purpose of Change: This revision clarifies that at least one lighting outlet containing aswitch or controlled by a wall switch shall be installed in attic and soffit locations.
84Ill.: pg. 6-15
NEC: pg. 507
GRAYBOY, Inc. 2007
FIELD INSTALLED SKELETON TUBING
1/4" (6 mm) SPACING 600.41(C)
DISCONNECT 600.6 404.14
TRANSFORMER
TRANSFORMER ENCLOSUREFLEXIBLE METALCONDUIT ARTICLE 348
PK HOUSING
EXTERIOR WALL
BRANCH-CIRCUIT 600.5(A); (B) 210.19(A)(1)
TUBE SUPPORT WITHIN 6" (150 mm)
FROM THE ELECTRODECONNECTION
600.41(B)
SUPPORT600.41(B)
1 1/2" (38 mm) SEPARATIONFROM TUBE SUPPORT FORTERMINALS 600.32(E)
Purpose of Change: This revision clarifies that neon tubing shall be supported within 6 in. (150 mm)from the electrode connection.
85Ill.: pg. 6-21
NEC: pg. 509
GRAYBOY, Inc. 2007
HOISTWAY
CORD HARD USAGE OIL
RESISTANT TYPE 6' (1.8 m) MAX 620.21(A)(1)(e)
SUMP PUMP OROIL RECOVERY PUMP 620.21(A)(1)(e)
PIT
WIRING METHODS620.21(A)(1)(e)
Purpose of Change: A new subdivision has been added to permit a sumppump or oil recovery pump to be cord- and plug-connected.
86Ill.: pg. 6-28
NEC: pg. 520
GRAYBOY, Inc. 2007
MACHINE ROOM ARTICLE 620, PART VIII
DISCONNECTING MEANS SHALL BE LISTED CAPABLE OF BEING LOCKED IN THE
OPEN POSITION PROVISIONS FOR LOCKING OR ADDING A
LOCK TO THE DISCONNECTING MEANSSHALL BE INSTALLED AND REMAIN INPLACE WITH OR WITHOUT THE LOCKINSTALLED
620.51(A)
10TH FLOOR
ELEVATOR CAR
CONTROLLER LOCATED IN HOISTWAY 620.51(C)(1)
DISCONNECTING MEANS (ADDITIONAL) NON-FUSED LISTED CAPABLE OF BEING LOCKED IN THE
OPEN POSITION LOCATED WITHIN SIGHT OF THE
MOTOR CONTROLLER PROVISIONS FOR LOCKING OR
ADDING A LOCK TO THEDISCONNECTING MEANS SHALL BEINSTALLED AND REMAIN IN PLACEWITH OR WITHOUT THE LOCK INSTALLED
620.51(C)(1)
NOTE: PORTABLE MEANS FOR ADDINGA LOCK TO THE SWITCH OR CIRCUITBREAKER SHALL NOT BE PERMITTED.
ON ELEVATORS WITHOUT GENERATOR FIELD CONTROL620.51(C)(1)
Purpose of Change: This revision clarifies that where the motor controller is located in the elevator hoistway, the disconnectingmeans required by 620.51(A) shall be located in a machinery space, machine room, control space or control room outside thehoistway; and as additional disconnecting means (non-fused) shall be located within sight of the motor controller.
87Ill.: pg. 6-34
NEC: pg. 524
G
RAYB
OY,Inc.2007
POSTS
OVERHEAD GANTRY
ARTICLE 626 - ELECTRIFIED TRUCK PARKING SPACES
PART I - GENERAL
SECTION HEADING
626.1626.2626.3626.4
SCOPEDEFINITIONSOTHER ARTICLESGENERAL REQUIREMENTS
PART II - ELECTRIFIED TRUCK PARKING SPACE ELECTRICAL WIRING SYSTEMS
626.10626.11
BRANCH CIRCUITFEEDER AND SERVICE LOAD CALCULATIONS
PART III - ELECTRIFIED TRUCK PARKING SPACE SUPPLY EQUIPMENT
626.22626.23626.24626.25626.26626.27
WIRING METHODS AND MATERIALSOVERHEAD GANTRY OR CABLE MANAGEMENT SYSTEMELECTRIFIED TRUCK PARKING SPACE SUPPLY EQUIPMENT CONNECTION MEANSSEPARABLE POWER-SUPPLY CABLE ASSEMBLYLOSS OF PRIMARY POWERINTERACTIVE SYSTEMS
PART IV - TRANSPORT REFRIGERATED UNITS (TRUs)
626.30626.31626.32
TRANSPORT REFRIGERATED UNITSDISCONNECTING MEANS AND RECEPTACLESSEPARABLE POWER SUPPLY CABLE ASSEMBLY
ELECTRIFIED TRUCK PARKING SPACESARTICLE 626
Purpose of Change: A new article has been added to address requirements for electrified truck parkingspaces.
88Ill.: pg. 6-38
NEC: pg. 531
GRAYBOY, Inc. 2007
MAINTENANCE DISCONNECTINGMEANS SHALL BE PROVIDED FOR ALL
UTILIZATION EQUIPMENT OTHERTHAN LIGHTING
SHALL BE READILY ACCESSIBLEAND WITHIN SIGHT
680.12
DISCONNECT MUST BE LOCATED ATLEAST 5' (1.5 m) HORIZONTALLY FROMTHE INSIDE WALL OF POOL, SPA, ORHOT TUB 680.12
5' (1.5 m)
NOTE: A PERMANENTLY INSTALLED BARRIER BETWEENTHE OPEN WATER AND DISCONNECTING MEANS SHALL BEPERMITTED TO REDUCE THE 5 FT (1.5 m) REQUIREMENTSBUT STILL REQUIRES A 5 FT REACH PATH OR GREATER.
MAINTENANCE DISCONNECTING MEANS680.12
Purpose of Change: This revision clarifies the distance for the disconnecting means from open water.
89Ill.: pg. 6-51
NEC: pg. 561
GRAYBOY, Inc. 2007
Purpose of Change: This revision clarifies the requirements for inspections, relamping or othermaintenance for underwater wet-niche luminaires.
SERVICING680.23(B)(6)
CABLE LENGTH SHALL ALLOWREMOVED LUMINAIRE ON POOLDECK FOR INSPECTION, RELAMPINGOR OTHER MAINTENANCE680.23(B)(6)
WATER LEVEL
DECK BOX 680.24(A)(2)
TO PANELBOARD 680.23(F)
CONDUIT 680.23(B)(2)
WET-NICHE POOL LIGHT 680.23(B)
NOTE: THE LUMINAIRE MAINTENANCELOCATION SHALL BE ACCESSIBLEWITHOUT ENTERING OR GOING INTHE POOL WATER.
90Ill.: pg. 6-56
NEC: pg. 563
G
RAYB
OY,Inc.2007
8AWG cu. BONDINGCONDUCTOR 680.26(B)(1)(b)
METALPOST
METAL LADDERS,SLIDES, POSTS, ETC. 680.26(B)(3)
WATERCIRCULATINGPUMP 680.26(B)(6)
METALSKIMMER 680.26(B)(3)
DIVING BOARD
DECK
METALDRAIN 680.26(B)(3)
METAL LIGHTFORMING SHELL 680.26(B)(3) 8 AWG BARE SOLID CONDUCTOR INSTALLED TO
PROVIDE A 12 IN. (300 mm) x 12 IN. (300 mm)NETWORK UNDER THE POOL AND DECK PER680.26(B)(1)(b)
DECK BOX(IF WITHIN 5' (1.5 m) OFINSIDE WALL OF POOL) 680.26(B)(7)
BOND POOLIN WATER 600.26(C)(3)b
EQUIPOTENTIAL BONDING680.26(A) THROUGH (C)
COPPER CONDUCTOR GRID
BE CONSTRUCTED OF MINIMUM 8 AWG BARE SOLIDCOPPER CONDUCTORS BONDED TO EACH OTHER ATALL POINTS OF CROSSING
CONFORM TO THE CONTOUR OF THE POOL AND THEPOOL DECK
BE ARRANGED IN A 12 IN. (300 mm) BY 12 IN. (300 mm)NETWORK OF CONDUCTORS IN A UNIFORMLYSPACED PERPENDICULAR GRID PATTERN WITHTOLERANCE OF 4 IN. (100 mm)
CONDUCTIVE POOL SHELLS
POURED CONCRETE PNEUMATICALLY APPLIED OR SPRAYED CONCRETE CONCRETE BLOCK WITH PAINTED OR PLASTERED
COATINGS
ALTERNATE MEANS
AT LEAST ONE MINIMUM 8 AWG BARE SOLID COPPERCONDUCTOR SHALL BE PROVIDED THE CONDUCTORS SHALL FOLLOW THE CONTOUROF THE PERIMETER SURFACE THE REQUIRED CONDUCTOR SHALL BE 18 TO 24 IN.(450 mm TO 600 mm) FROM THE INSIDE WALL OF THEPOOL THE REQUIRED CONDUCTOR SHALL BE SECUREDWITHIN OR UNDER THE PERIMETER SURFACE 4 TO 6IN. (100 mm TO 150 mm) BELOW THE SUBGRADE
ALTERNATE MEANS
VINYL LINERS FIBERGLASS COMPOSITE
Purpose of Change: This revision clarifies the equipotential bonding requirements.
91Ill.: pg. 6-61
NEC: pg. 566
GRAYBOY, Inc. 2007
POOL FILTER PUMP ISDOUBLE INSULATED
NO BONDING REQUIREDFOR THESE ITEMS
42"(1 m)MAX.
STORABLE POOL MAXIMUM DEPTH
42 IN. 680.2
RECEPTACLE LOCATED AT LEAST
6' (1.8 m) FROM THEINSIDE WALLS OFTHE POOL
680.34
GFCI-PROTECTION PROVIDE WITH A GFCI THAT IS AN
INTEGRAL PART OF THE ATTACHMENTPLUG OR
LOCATED IN THE POWER SUPPLYCORD WITHIN 12 (300 mm) OF THEATTACHMENT PLUG
680.31
PUMPS680.31
Purpose of Change: This revision clarifies that storable pool cord-connected filter pumps shall be protectedwith a GFCI that is an integral part of the attachment plug or located in the power supply cord within 12 inchesof the attachment plug.
92Ill.: pg. 6-63
NEC: pg. 568
GRAYBOY, Inc. 2007
GENERATOR 695.2
PIPING
FIRE PUMP
FIRE PUMPCONTROLLER
2-HOUR FIRERESISTANT RATING 695.6(B)(1); (B)(2)LISTING
695.10
CIRCUIT CONDUCTORS695.6(B)(1), (B)(2), AND (B)(3)
Purpose of Change: This revision clarifies that fire pump supply conductors shall be protected by a 2-hour fireresistance rating if not encased in a minimum of 2 in. (50 mm) of concrete or by a listed electrical protectivesystem with a 2-hour minimum fire rating.
93Ill.: pg. 6-80
NEC: pg. 594
GRAYBOY, Inc. 2007
EMERGENCYPOWER SOURCE 700.5(B)
SWITCHBOARD SEPARATE VERTICAL SECTIONS 700.9(B)(5)(a)
GENERATOR 445.19(1)
TRANSFEREQUIPMENT
SERVICEEQUIPMENT
NORMALPOWERSOURCE
EMERGENCY LEGALLYREQUIREDSTANDBY
OPTIONALSTANDBY
94Ill.: pg. 7-3
NEC: pg. 597
GRAYBOY, Inc. 2007
EMERGENCYPOWER SOURCE 700.5(B) WIREWAY
GENERATOR 445.19(2)
TRANSFEREQUIPMENT
SERVICEEQUIPMENT
NORMALPOWERSOURCE
EMERGENCY LEGALLYREQUIREDSTANDBY
OPTIONALSTANDBY
FEEDER (SINGLE) SEPARATE ENCLOSURE 700.9(B)(5)(b)
94.2Ill.: pg. 7-3
NEC: pg. 597
GRAYBOY, Inc. 2007
FEEDER (MULTIPLE)
GENERATOR 445.19(2)
TRANSFEREQUIPMENT
SERVICEEQUIPMENT
NORMALPOWERSOURCE
EMERGENCY LEGALLYREQUIREDSTANDBY
OPTIONALSTANDBY
FEEDER (SINGLE) SEPARATE ENCLOSURE 700.9(B)(5)(b)
WIRING700.9(B)(5)
Purpose of Change: A new subdivision has been added to provide wiring requirements for the emergency source.
94.3Ill.: pg. 7-3
NEC: pg. 597
GRAYBOY, Inc. 2007
NOTE 2: IF NORMAL POWER FAILS, DIMMER SYSTEM SHALLSELECTIVELY ENERGIZE EMERGENCY BRANCH-CIRCUITS TOSUPPLY MINIMUM EMERGENCY ILLUMINATION.
NOTE 1: LISTED CONTROL DEVICE USED TO ENERGIZEEMERGENCY LIGHTING CIRCUITS PER 700.23.
MORE THANONE DIMMER 700.23
DIMMER SYSTEM 700.23
LABEL IDENTIFYINGCIRCUITS
DIMMER SYSTEMDISCONNECTS
FLOURESCENT LIGHTING
HIGH-INTENSITYDISCHARGE LIGHTING
DIMMER SYSTEMS700.23
Purpose of Change: A new section has been added to address a dimmer systemcontaining more than one dimmer and listed for use for emergency systems.
95Ill.: pg. 7-9
NEC: pg. 600
GRAYBOY, Inc. 2007
SERVICEEQUIPMENT
NORMALPOWERSOURCE
FEEDER (MULTIPLE)
GENERATOR 445.19(2)
AUTOMATICTRANSFERSWITCH
ALLLOADS
ALTERNATEPOWERSOURCE 702.5(B)
OPTIONAL STANDBY SYSTEM
WHERE A SYSTEM IS EMPLOYED THAT WILL AUTOMATICALLYMANAGE THE CONNECTED LOAD, THE STANDBY SOURCESHALL HAVE A CAPACITY SUFFICIENT TO SUPPLY THEMAXIMUM LOAD THAT WILL BE CONNECTED BY THE LOADMANAGEMENT SYSTEM
702.5(B)(2)(b)
SYSTEM CAPACITY702.5(B)
Purpose of Change: This revision clarifies the installation of manual transfer and automatic transfer applicationsfor optional standby systems.
96Ill.: pg. 7-11
NEC: pg. 604
GRAYBOY, Inc. 2007 ARTICLE 708 - CRITICAL OPERATIONS POWER SYSTEMS (CDPS)
PART I - GENERAL
SECTION HEADING
708.1708.2708.3708.4708.5708.6708.8
SCOPEDEFINITIONSAPPLICATION OF OTHER ARTICLESRISK ASSESSMENTPHYSICAL SECURITYTESTING AND MAINTENANCECOMMISSIONING
708.10708.11708.12708.14
FEEDER AND BRANCH-CIRCUIT WIRINGBRANCH CIRCUIT AND FEEDER DISTRIBUTION EQUIPMENTFEEDERS AND BRANCH CIRCUITS SUPPLIED BY COPSWIRING OF HVAC, FIRE ALARM, SECURITY, EMERGENCY COMMUNICATIONSAND SIGNALING SYSTEMS
708.20708.22708.24708.30
SOURCES OF POWERCAPACITY OF POWER SOURCESTRANSFER EQUIPMENTBRANCH CIRCUITS SUPPLIED BY COPS
708.50708.52708.54
ACCESSIBILITYGROUND-FAULT PROTECTION OF EQUIPMENTCOORDINATION
708.64 EMERGENCY OPERATIONS PLAN
PART II - CIRCUIT WIRING AND EQUIPMENT
PART III - POWER SOURCES AND CONNECTION
PART IV - OVERCURRENT PROTECTION
PART V - SYSTEM PERFORMANCE AND ANALYSIS
Purpose of Change: A new article has been added dealing with mission critical power systems withdetailed installations for electrical power for vital infrastructures.
97Ill.: pg. 7-13
NEC: pg. 609
GRAYBOY, Inc. 2007
CONDUCTORS(NOT FUNCTIONALLYASSOCIATED) CLASS I POWER-SUPPLY 725.48(B)(4)(1)
NOTE: IF A BARRIER IS NOT INSTALLED, ALLOF THE CONDUCTORS SHALL BE INSTALLEDWITHIN SEPARATE MULTICONDUCTOR TYPEAC, TYPE MC, TYPE MI, OR TYPE TC CABLESAND ALL OF THE CONDUCTORS IN THECABLES SHALL BE INSULATED AT 600 VOLTS.
BARRIER 725.48(4)
IN CABLE TRAYS725.48(B)(4)
Purpose of Change: This revision clarifies the permitted methods of installation for Class Icircuit conductors and power-supply conductors that are not functionally associated.
98Ill.: pg. 7-17
NEC: pg. 617
GRAYBOY, Inc. 2007
ABANDONED CABLES SHALL BE REMOVED COMMUNICATIONS CABLES COAXIAL CABLES NETWORK-POWERED BROADBAND CABLES 800.25 820.25 830.25
FIREWALL PENETRATIONS OPENINGS SHALL BE FIRE STOPPED
USING APPROVED METHODS TOMAINTAIN THE FIRE RESISTANCE RATING
800.26 820.26 830.26
CABLE PENETRATIONS COMMUNICATIONS CABLES COAXIAL CABLES NETWORK-POWERED
BROADBAND CABLES
OKAY
ABANDONED CABLES AND SPREAD OFFIRE OR PRODUCTS OF COMBUSTION
800.25800.26
Purpose of Change: A new section has been added to address the requirements for the prevention of thespread of fire and one has been added dealing with abandoned cables.
99Ill.: pg. 8-4
NEC: pg. 641
GRAYBOY, Inc. 2007
Purpose of Change: A new section has been added to require a minimum of onecommunications outlet within a dwelling unit for new construction.
DWELLING UNIT COMMUNICATIONS OUTLET800.156
LIVINGROOM
BD 2
BD 3 BR 1
BR 2BD 1
DEN
KITCHEN
ATTIC
COMMUNICATIONS OUTLET NEW CONSTRUCTION AT LEAST ONE INSTALLED CABLED TO THE SERVICE
PROVIDER DEMARCATION POINT 800.156
100Ill.: pg. 8-10
NEC: pg. 647
'2008.Changes.Ch.01.pdfSlide #190.2(B)(5)bBonded (Bonding)Branch-Circuit Overcurrent DeviceClothes ClosetElectrical Power ProductionEquipmentGrounding Conductor, EquipmentGroundGroundedGrounded, EffectivelyGrounding ElectrodeGrounding Electrode ConductorIntersystem Bonding TerminationLuminaireManufactured HomesNeutral ConductorQualified PersonShort-Circuit Current Rating.1Short-Circuit Current Rating.2Short-Circuit Current Rating.3Surge ArresterUngroundedUtility-Interactive Inverter110.12(A)110.16.1110.16.2110.20.1110.20.2110.22(A)-(C)110.26(C)(1); (C)(2)110.26(C)(3)110.33(A)110.33(A)(3)
'2008.Changes.Ch.02-1.pdf200.2210.4(B)210.4(D)210.5(C)210.8(A)(2)-(A)(5)Slide #6210.8(B)(4)210.12(B)210.12(B), Ex.210.12(B), Ex. 2210.19(A)(1), EX. 2210.52(C)210.52(E)(1) - (E)(3)210.62215.2(A)(1), Ex. 2-1215.2(A)(1), Ex. 2-2215.6.1215.6.2215.12(C)225.18225.39230.24(B)230.40, Ex. 1230.44, Ex.230.71(B)230.95, Ex. 2230.205(A)240.4(D)240.21(C)(2)(4)240.21(C)(3)240.21(H)240.24(F)240.86(A).1240.86(A).2240.91(A); (B)240.92(B)250.6(A)250.8(A); (B)250.20(A)(3)250.20(D)250.21(B)250.22(5)250.24(D)250.28(D)(1) - (D)(3)250.30(A)250.30(A)(4)250.32(A)250.32(B); Ex.
'2008.Changes.Ch.02-2.pdf250.35250.36250.52(A)(2)250.52(A)(3)250.52(A)(5)250.54250.56250.64(D)(1) - (D)(3)250.64(E)250.68(A), Ex. 2250.94250.104(A)(2)250.104(D)(1), Ex. 1250.106, FPN 1250.112(I)250.119, Ex.250.119(A)250.122(C)250.122(F)250.146250.146(A)250.146(D)250.166280.2285.23(A); (B)285.24285.25
'2008.Changes.Ch.03.pdf300.4(E)300.4(G)300.5(B)300.9300.12, Ex. 2300.11(A)(2)Table 300.50, Note 3Table 300.50d310.7, FPN310.15(B)(2)(c).1310.15(B)(3)310.15(B)(6)314.16314.16(B)(1)314.16(B)(4)314.24(A)-(C)314.27(A); (B)314.27(E); Ex.314.28(A)320.10(1)328.10(3); Ex.330.10(B)(4)334.12(A)(1), Ex.334.15(B)334.15(C).1334.15(C).2334.80.1334.80.2336.10(7), Ex.338.12(A); (B)342.30(C)344.10(A)-(C)344.30(C)348.12(1)(1)348.30(A), Ex. 1348.60350.30(A), Ex. 1350.30(A), Ex. 2350.60352.30(C)Article 355356.10(7)358.30(C)362.30(A), Ex. 3366.2366.23(A)376.22(A); (B)376.56(B)(4)376.100382.6382.10(A)382.10(C)382.42(B)392.8(A)392.9(A)(1)392.11(C)(1); (C)(2)396.30(A)-(C)
'2008.Changes.Ch.04.pdf402.11404.4404.8(C)404.9(B)(1)406.4(G)406.8(A)406.8(B)(1), Ex.406.11408.3(F)408.4408.36, Ex. 1; Ex. 2408.54408.55, Ex. 1408.58409.2410.10(D)410.16(D)(1) - (D)(5)410.62(C)(1)(2)c410.130(A)410.130(G)410.141(B)410.151(B), FPN411.3(A); (B)411.4(A); (B)411.5(D)(1) - (D)(3)422.51424.19426.50(A)427.13430.32(C)430.52(C)(1), Ex. 2430.81(A)430.102(B)(1); (B)(2)430.103430.110(C)(1).1430.126430.227440.14, Ex.1445.13445.18445.19.1445.19.2450.5(B)(2)(b), Ex.490.44(C)490.46
'2008.Changes.Ch.05.pdf500.7(K)(1)-(K)(3)500.8(A), FPN501.10(B)(7)(7)501.30(B)501.100(A)(2)502.30(B)502.120(B)(2)502.130(B)(2)502.150(B)(1)503.30(B)504.2504.30(A)(1), Ex. 3504.30(A)(2)504.70505.2505.8(K)(1)-(K)(3)505.9(F)505.17(6)505.25(B)506.2Table 506.9506.9(C)(1)&(C)(2)506.9(F)506.25(B)513.2513.3(C)(2)517.2517.19(D)517.32(C); (E); (F)517.34(A)&(B)517.160(A)(5)518.3(B)518.5; Ex.Article 522525.5(B)(1); (B)(2)547.5(F)547.5(G)547.9(E)547.10(A)(1); (A)(2)550.2550.20(A)550.25(B)551.42(C)551.47(S)555.9555.21(B)(1); (B)(2)
'2008.Changes.Ch.06.pdf600.2600.4(C)600.5(C)(3)600.6(A)(1)600.6(A)(2)(3)600.7(A); (B)600.12(A)-(C)600.21(E)600.24(A)-(C)600.32(K)600.41(B)600.41(D)600.42(G)(1); (G)(2)610.31(2)620.21(e)620.21(A)(3)(e)620.51(A)620.51(C)(1)625.23626.1-32.1640.6(A)-(D)645.5(F); (G)647.8(A)665.12675.8(B)680.10680.12680.22(A)(1)-(A)(3)680.22(E); FPN680.23(B)(6)680.26(A)-(C).1680.31680.43(D), Ex. 2680.71680.74690.4(D)690.5(A)-(C)690.43690.62695.6(B)(1); (B)(2)
'2008.Changes.Ch.07.pdf700.6(C)(1)700.9(B)(5).1700.9(B)(5).2700.9(B)(5).3700.9(D)(3)700.23702.5(B)Article 708Article 725.1Article 725.2725.48(B)(4)Article 760.1Article 760.2Article 770
'2008.Changes.Ch.08.pdf800.2800.25; 26800.93(A); (B)800.100(A)(6)800.156
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