Report of the Committee on PART I (Log #22) SUBMITrER

Report of the Committee on

Emergency Power Supplies

Delmont C. Thurber, Chair Great Falls, MT

ManuelJ. DeLerno, Secretary S-P-D'lndustries Inc., IL

Ernest E. Allen, Ohio Hospital Insurance Co., OH Rep. NFPA Health Care Section

James K. Bell, Stewart & Stevenson Services Inc., TX Rep. Electrical Generating Systems Assn.

Douglas V. Berube, Riverside Methodist Hospital, OH Rep. U.S. Health Corp.

Lawrence A. Bey, Onan Corp., MN A. Dan Chisholm, Motor and Generator Inst. (MGI), FL Dennis DeMoss, Sargent & Lundy, IL William H. Everard, Everard Fire Protection Engr Ltd, VA Gordon S. Johnson, Dundee, FL Rep. Inst. of Electrical and Electronics Engr, Inc.

Charles R. McDonald, McDonald Equipment Co., OH DanielJ. O'Connor, Schirmer Engr Corp., IL T. D. Shockley, Memphis State University, TN Ronald M. Smidt, New Hanover Regional Medical Center, NC Rep. American Hospital Assn.

Timothy G. Stiliman, Ft. Lauderdale, FL David G. Strasser, Marathon Electric Mfr Corp., WI Rep. Nat'l Electrical Mfi's. Assn.

James E. Tyson, Jr., U.S. Dept. of Veterans Affairs, DC David E. Watters, H F Lenz Co., PA

Alternates

Douglas S. Erickson, American Hospital Assn., IL (Alt. to R. M. Smidt)

James R. Iverson, Onan Corp., MN (Alt. to L. A. Bey)

David K. Norton, U.S. Dept. of Veterans Affairs, DC (Alt. toJ. E. T~on,Jr.)

Staff Liaison: Burton R. Klein

This list represents the membership at the time the Committee was balloted on the text of this edition. Since that time, changes in the membership may have occurred.

Committee Scope: This Committee shall have primary responsibil- ity for documents on performance criteria for the selection and assembly of the components for emergency and standby power systems in buildings and facilities including categories of power supplies, transfer equipment, controls, supervisory equipment and all related electricafand mechanical auxiliary or accessory equipment needed to supply emergency or standby power to the utilization equipment. The Committee shall also be responsible for criteria on the maintenance and testing of the system. This committee does not cover requirements for the application of emergency power systems, self-contained emergency lighting units and the electrical wiring except that wiring which is an integral part of the system up to the load side of the transfer switch(es).

This portion of the Technical Committee Report of the Committee on Emergency Power Supplies is presented for adoption in 2 parts.

Part I of this Report on Comments was prepared by the Technical Committee on Faiaergency Power Supplies, and documents its action on the comments received on its Report on Proposals on NF'PA 110-

• 1993, Standard for Emergency & Standby Power Systems as published in the Report on Proposals for the 1995 Fall Meeting.

Part I of this Report on Comments has been submitted to letter ballot of the Technical Committee on Emergency Power Supplies, which consists of 18 voting members. The results of the ball&ing can be found in the report.

Part II of this Report on Comments was prepared by the Technical Committee on Emergency Power Supplies, and documents its action on the comments received on its Report on Proposals on NFPA 1 l l - 1993, Standard on Stored Electrical'Energy Emergency & Standby Power Systems as published in the Report on Proposals for the 1995 Fall Meeting.

Part II of dais Report on Comments has been submitted to letter ballot of the Technical Committee on Emergency Power Supplies, which consists of 18 voting members. The results of the balloting can be fund in the report.

PART I

(Log #22) 110- 1 - (2-2 Seismic Risk Areas): Reject SUBMITrER: Lawrence A. Bey, t h a n Corp. COMMENT ON PROPOSAL NO: 110-4 RECOMMENDATION: Revise to read: Seismic Risk Areas. Defined as zones 3 and 4 of the Uniform

Building Code seismic zone map. SUBSTANTIATION: The Modified Mercali Intensity Scale does not define seismic risk areas. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: 1. Appendix A-3-1.2 includes recommendations on one source for risk definition (i.e., Zones 3 & 4 of the UBC).

2. Definition of seismic risk areas should not be referenced for requirements from any one building code. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 16 NOT RETURNED: 2 DeMoss, Strasser

(Log #29) 110- 2 - (2-2 Tank, Integral): Accept in Principle SUBMITTER: Gordon Johnson, Dundee, FL COMMENT ON PROPOSAL NO: 110-5 RECOMMENDATION: Revise "Tank, Integral" definition last clause to read:

" . . .moun ted integral with the engine." SUBSTANTIATION: To allow base mounted fuel tanks. COMMITTEE ACTION: Accept in Principle. Revise definition of Integral tank to read: "A fuel tank furnished by the EPS manufacturer, and mounted on

the engine or the engine sub-base." COMMITTEE STATEMENT: To clarify that a fueftank furnished by a EPS marmfacturer, and located on the engine sub-base can be considered an integral tank. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 16 NOT RETURNED: 2 DeMoss, Strasser

(Log #30) 110- 3 - (3-3.1): Accept SUBMITTER: Gordon Johnson, Dundee, FL COMMENT ON PROPOSAL NO: 110-12 RECOMMENDATION: Reject proposal and return to original text. SUBSTANTIATION: The wording infers a test for conformance for acceptance. Acceptance test are in 5-13. Proposal would allow less than 90°F which is the accepted minimum. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBER~ ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 16 NOT RETURNED: 2 DeMoss, Strasser

110-4- (3-4.1): Reject (Log#31) SUBMITTER: GordonJohnson, Dundee, FL COMMENT ON PROPOSAL NO: 110-15 RECOMMENDATION: Replace "annually" in the proposed addition with "frequendy." SUBSTANTIATION: Load review should be a requirement. Rationale for Committee Statement is faulty. See DeLerno negative vote. COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: Term "frequently" is vague and not enforceable. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


16

N F P A 110 ~ F 9 5 R O C

(Log #17) 110- 5 - (3-5.4.4): Reject SUBMITTER: Lawrence ~ Bey, O n a n Corp. COMMENT ON PROPOSAL NO: 110-18 RECOMMENDATION: Revise Commi t tee Action on item #2 to read: "until one cranking limit t ime out." SUBSTANTIATION: The intent was for 2-1/2 cranking cycles to equal one cranking limit, no t two. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: It is commi t tee ' s in tent to assure that sufficient battery capacity remains to allow a second cranking limit t ime out after repair ing a fault. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #32) 110- 6 - (3-5.4.4): Reject SUBMITTER: Gordon Johnson , Dundee , FL COMMENT ON PROPOSAL NO: 110-18 RECOMMENDATION: Revise Commit tee Action in accord with Bey negative vote. SUBSTANTIATION: Correction. COMMITrEE ACTION: Reject. COMMITrEE STATEMENT: C o m m e n t is the same as C o m m e n t 110-5 (Log #17), and is rejected for the same reason. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 16 N O T RETURNED: 2 DeMoss, Strasser

(Log #33) 110- 7 - (3-5.5.2(c)): Accept SUBMITTER: G o r d o n J o h n s o n , Dundee , FL COMMENT ON PROPOSAL NO: 110-20 RECOMMENDATION: Accept proposal. SUBSTANTIATION: The Commit tee S ta tement is wrong. The first sentence of the substantiat ion is correct, see also C o m m e n t on PcrOposal 110-25.

OMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #34) 110- 8 - (3-5.5.2(d)): Accept SUBMITTER: Gordon Johnson , Dundee , FL COMMENT ON PROPOSAL NO: 110-21 RECOMMENDATION: Accept proposal. SUBSTANTIATION: No one unders t ands what is required by "battery charger malfunction." COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBF.J~; ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #I 6) 110- 9 - (Table 3-5.5.2(d)): Accept SUBMITTER: Lawrence A. Bey, O n a n Corp. COMMENT ON PROPOSAL NO: 110-21 RECOMMENDATION: Accept proposal as submit ted. SUBSTANTIATION: Battery charger malfunct ion remains undef ined . As presently worded "battery charger malfunct ion" canno t be d is t inguished f rom "low voltage in battery" as both are measur ing voltage across c o m m o n conductors, with one end connec ted to the charger and the other end connec ted to the battery. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18

VOTE ON COMMITTEE ACTION: AFFIRMATIVE: 16 N O T RETURNED: 2 DeMoss, Strasser

(Log #CC3) 11 0- 10 - (Table 3-5.5.2(d)): Accept SUBMIT'rER: Technical Commit tee on Emergency Power Supplies, COMMENT ON PROPOSAL NO: 110-21 RECOMMENDATION: In Table 3-5.5.2(d), add the following new funct ion (m):

"(m) Battery Charger ac Failure" For Level 1, place an "x" u n d e r "C.V." column. For Level 2, place an "o" unde r "C.V." column,

SUBSTANTIATION: To assure that the failure of ac power to battery charger does not lead to low battery voltage. It will also give an immedia te indication of a problem. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #19) 110- I 1 - (3-5.5.2(g)): Reject SUBMITTER: Lawrence A. Bey, O n a n Corp. COMMENT ON PROPOSAL NO: 110-25 RECOMMENDATION: Accept proposal as submitted. SUBSTANTIATION: The substantiat ion for this proposal makes a valid reliability poin t that should be addressed. NFPA 37 is general to all engines, while NFPA 110 is specific to engines used for emergency power. COMMITI'EE ACTION: Reject. COMMITI'EE STATEMENT: C o m m e n t 110-7 (Log #33) addresses the issue o f h igh lube oil temperature shut down. NUMBER OF COMMITTEEMEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #35) 110- 12- (3-5.5.2(g)): Reject SUBMITTER: Gordon Johnson , Dundee , FL COMMENT ON PROPOSAL NO: 110-25 RECOMMENDATION: Accept proposal. SUBSTANTIATION: The Commit tee S ta tement overlooked the safety p r o b l e m p o i n t e d out in file substantiation. COMMITTEE ACTION: Reject. COMMITrEE STATEMENT: Same issue as C o m m e n t 110-11 (Log #19). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #28) 110- 13 - (3-5.6.1.1): Reject SUBMITTER: Vic D. H u m m , Vic H u m m & Associates COMMENT ON PROPOSAL NO: 110-26 RECOMMENDATION: Revise text to match format of NFPA 90A- 1993 edition paragraph 4-4.4.2 for new paragraph to read:

"In addit ion to requi rements of paragraph 3-5.5 and 3-5.6, when emergency power is connec ted to the b r a n c h circuit of the bui lding fire alarm panel, the outputs of the remote control an d alarms shall be in te rconnec ted to the bui lding fire a larm panel in accordance with the provisions of NFPA 72 for moni to r ing of supervisory alarms." SUBSTANTIATION: Tltis complies with other NFPA publications that have already been voted on and accepted by the public for at least two cycles. NFPA 1%1990 edition, 2-6.5 and NFPA 17A-1990 edition, paragraph 2-5.2.3 have similar wording. Thus , scope was not an issue in previous and cur ren t editions of these standards. Also when a genera tor supplies energy to the branch circuits of the fire a larm system, the fire a larm system does no t show a t rouble condition.

17

N F P A 110 1 F 9 5 R O C

COMMITTEE ACTION: R~ect . COMMITTEE STATEMENT: Contacts are available to add remote signals by user. It is outside the scope of this commit tee to add moni to r ing of signals. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #23) 110- 14 - (4-2.4.4 Exception No. 2 (New)): Accept SUBMITI'ER: Ronald M. Smidt, New Hanover Regional Medical Center COMMENT ON PROPOSAL NO: 110-28 RECOMMENDATION: As reques ted by original submit ter add a second exception:

"A p r o g r a m m i n g t iming device shall no t be requi red in Heal th Care Facilities with schedu led testing in accordance with NFPA 99." SUBSTANTIATION: Reques t Technical Commi t tee reconsider this exception. Timers on Emergency Power Sources can not be used to adequately test EPSS in a level one system as out l ined in NFPA 110 6-4.1 and 0-4.2.

Emergency Power systems in at least the acute care set t ing are a lmost always level one systems.

Generators in level one settings require overview by t ra ined ma in t enance staff to ensure tha t r u n n i n g parameters are mee

I feel tha t the exception will help insure tha t mainta iners are no t lulled into a false sense o f security by th ink ing that the Genera tor has been exercised properly, when in fact the use of exercise t imes is contrary to this very s tandard. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 15 NEGATIVE: 1 NOT RETURNED: 2 DeMoss, Strasser

EXPLANATION OF NEGATIVE: MCDONALD: See negative vote on C o m m e n t 110-15 (Log #42).

(Log #42) 110- 15 - (4.2.4.9 Exception No. 2): Accept SUBMITTER: Douglas S. Erickson, Amer ican Hospital Association COMMENT ON PROPOSAL NO: 110-28 RECOMMENDATION: Accept the original proposal. SUBSTANTIATION: Health care facilities which have test ing programs conforming to NFPA 99 are per forming mon th ly tests on a manua l basis. These tests are load tests and no t only to operate the pr ime mover every 30 days. W h e n tests are scheduled, the facility staff is notified well in advance of the actual s tart ing of the genera tor system due to the many hazardous si tuations which may occur in a heal th care setting. Not only are we conce rned with the type of paden t care being adminis te red at the t ime of system testing, bu t also the indoor air quality as some of the engine set exhausts are pul led into the facilities air hand l ing systems. We have also t ra ined our staff to be overly conscious of fire and i f a smoke p lume appears as a result of t imer test with no advanced notice the fire service will be called to respond. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: MCDONALD: My negative vote reflects my concern that a l though

most heal th care facilities do an excel lent j o b o f testing file EPSS, there are many tha t d o n ' t pe r fo rm the requi red testing, particularly Nursing Homes. We can track the State Fire Marshall 's progress as h e p e r f o r m s Iris annua l test by the service calls we receive mostly due to dead or dry batteries for the EPS. Additionally, submit ters a rgument s regarding exhaus t gases en te r ing a bui lding are covered by 5-10.2. Mr. Schmidt ' s negative vote c o m m e n t on Proposal 110-28 (Log #37) does not recognize that most t imers are fu rn i shed with a capability to run t he test ei ther with or without load.

(Log #21) 110- 16 - (4-5.1): Accept SUBMITTER: Lawrence A~ Bey, O n a n Corp. COMMENT ON PROPOSAL NO: 110-30 RECOMMENDATION: Retain p resen t wording of 4-5.1, except change "ensure" to "optimize." SUBSTANTIATION: It should be the objective to achieve the highest practical level of selective coordinat ion possible, without rul ing out the use of overcurrent devices with ins tan taneous magnet ic trips. See my negative c o m m e n t in the ROP. COMMITTEE ACTION: Accept.

Accept submit ter ' s r ecommenda t ion . Also, add "(EPSS)" after "emergency power supply system" in text. COMMITTEE STATEMENT: Editorial. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #36) 110- 17- (5-2.1): Accept SUBMITTER: G o r d o n J o h u s o n , Dundee , FL COMMENT ON PROPOSAL NO: 110-30 RECOMMENDATION: Revise the proposed addi t ion to file first sen tence to read:

"and resisting m a x i m u m wind velocity required by the local bui lding code." SUBSTANTIATION: Many enclosures for genera tor sets have been fu rn i shed for 150 MPH winds and even some for 200 MPH but 150 may no t be necessary for mos t locations. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #14) 110-18 - (5-9.2): Accept SUBMITTER: Lawrence A. Bey, O n a n Corp. COMMENT ON PROPOSAL NO: 110-42 RECOMMENDATION: Delete "Gravity feed of fuel to the pr ime mover shall no t be allowed except f rom an integral tank (see NFPA 37, S tandard for the Installation and Use o f Stationary Combust ion Engines and Gas Turbines) ." SUBSTANTIATION: This c o m m e n t is i n t ended to clarify the Commit tee Action on Proposal 110-42.

The intent of the or iginalproposal : The same type of gravity feed fuel supply system as required by NFPA 20 for diesel-engine fire p u m p s shou ld also be permi t ted by NFPA 110 for emergency an d s tandby genera tors as an optional fuel system.

The fuel supply system specified by NFPA 20 is inherent ly reliable in tha t there are no mechanical componen t s which could fail an d impede the flow of fuel to the engine. The engine is always provided with a sufficient quant i ty of fuel and can never be d i sab ledby a failed pump , inadvertently closed valve, etc. This same reliability s h o u l d b e allowed for emergency and s tandby diesel engine genera tors t h rough NFPA 110 since these units are used to drive electric motor fire p u m p s in addi t ion to o ther emergency loads which prevent l ife-threatening situations.

Is the difference between NFPA 20 and 110 due to possible fuel leakage issues? Lfso, it shou ld be unde r s tood that fuel leakage that can occur with gravity feed fuel systems can also occur with other tY~3oeS of fuel systems.

r example, a gravity feed system could develop a leak in the engine supply line and allow fuel to escape into the genera tor set room. Similarly, a f loor -mounted day tank in a con ta inmen t s t rncture has the same engine supply line which mus t be routed over the con ta inmen t wall to the engine. This line is e i ther located at floor level or routed slightly belowfloor level to file engine. In ei ther case, the level of this p i p e / h o s e is below the fuel level in the day tank and a leak would s iphon fuel f rom the day tank into the room. The day tank f l o a t / p u m p would keep refilling tile tank without regard to the leakage since the leakage occurs outside the con t a inmen t s t ructure and any associated a larm hardware.

Fuel leakage will always be a concern with any type of fuel supply system Whether it's gasoline, diesel, LP gas, natural gas, etc. but fuel leakage issues should no t deny the implementa t ion of a simple, reliable'fuel supply system when file risks are equal between systems.

18

N F P A 110 - - F 9 5 R O C

COMMITrEE ACTION: Accept. Retain the Action of Proposal 110-42, which added a new last

sentence to 5-9.2. COMMITrEE STATEMENT: Editorial. Clarify intent. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #CC2) 110- 19 - (5-9.5): Accept SUBMITrER: Technical Committee on Emergency Power Supplies, COMMENT ON PROPOSAL NO: 110-44

I RECOMMENDATION: Revise 5-.9.5 by changing "60 gal" to read: "660 gal max." SUBSTANTIATION: To correlate with requirements in NFPA 37. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TOVOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #18) 110- 20 - (5-9.7): Accept SUBMITTER: Lawrence A. Bey, Onan Corp. COMMENT ON PROPOSAL NO: 11045 RECOMMENDATION: Revise the Committee Action to read:

"The fuel supply to gas-fueled prime movers shall be connected ahead of die building's main shut-off valve and marked as supplying an emergency generator. The building's main gas shut-offx,alve shall be marked or tagged indicating the existence of the separate EPS shut-off valve." SUBSTANTIATION: The Committee Action and Statement does not speak to the main issue of f iremen inadvertently turning off the fuel supply to the emergency generator. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #37) 110- 21 - (5-9.7): Accept SUBMITTER: GordonJolmson, Dundee, FL COMMENT ON PROPOSAL NO: 110-45 RECOMMENDATION: Revise as in last paragraph of McDonald's negative vote. SUBSTANTIATION: McDonald stated it better daan the original proposal.

f COMMITTEE ACTION: Accept. Reference should be to first paragraph in negative vote of Mr.

McDonald. COMMITTEE STATEMENT: Editorial. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #38) 110- 29 - (5-9.10): Accept SUBMITTER: Gordon Johnson , Dundee, FL COMMENT ON PROPOSAL NO: 110-46 RECOMMENDATION: Accept proposal. SUBSTANTIATION: Diking is guilding dae lily for double-wall base tanks. There is no reason to leave this to the authority having Jcurisdiction.

OMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #39) 110- 23 - (5-12.6): Accept in Principle SUBMITTER: Gordon Johnson, Dundee, FL COMMENT ON PROPOSAL NO: 110-47 RECOMMENDATION: Revise proposed wiring to read:

"Battery charger output wiring shall be permanently installed." SUBSTANTIATION: There are too many "improvised" battery charge connections. COMMITTEE ACTION: Accept in Principle. Add new paragraph to 5-12.6 to read as follows: "Battery charger output wiring shall be permanently connected.

Connections shall not be made at the battery terminals." COMMYITEE STATEMENT: Issue is a corrosion problem, thus requiring permanen t connect ion somewhere away from the battery terminals. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #15) 110- 24 - (5-13.2.4): Accept SUBMITTERz Lawrence A. Bey, Onan Corp. COMMENT ON PROPOSAL NO: 110-51 RECOMMENDATION: The proposal should be rejected. SUBSTANTIATION: See Mr. McDonald's negative comment in the ROP. COMMITI'EE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #1 ) 110- 25 - (5-13.2.6): Reject SUBMITTER: Dennis Stubee, Florida Detroit Diesel-Allison, Inc. COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: I r ecommend my original proposal stand the way it was stated. SUBSTANTIATION: Rewording for clarity did not define the relationship between nameplate rating and the 90 percent criteria, if one indeedexists . The intent of my proposal is to establish criteria for determining whether or not the EPS will perform during an actual full load transient condition.

This is the onlyplace in NFPA Standard 110 where definitive testing of the EPS can be enforced. Paragraph 3-5.3.1 states "Frequency dip upon one-step application of full load shall not be excessive with return to steady-state conditions occurring within tile requirements of the load." Paragraph 3-5.9.6 (c) states "Voltage dip at the generator terminals for the maximum anticipated load change shall no t cause disruption or relay d ropout in the load." Paragraph 3-5.9.6(d) states "Frequency dip and restoration to steady state for any sudden load change shall no t exceed the user's specified need."

The purpose of this installation acceptance test is to verify the proper sizing and subsequent performance of the eng ine /genera to r set. It is important to analyze and unders tand exactly what happens to both die speed of the engine as well as the voltage output of the generator when this full 100 percent nameplate kW load is applied in a single step.

Upon application of load, either resistive or reactive, frequency and voltage boda decrease. A 2V/hertz voltage regulator reduces the power requirement on the engine by dropping twice as much voltage as engine speed falls, preventing "turbo lag" problems and enabling the engine to quickly recover speed. The lower the voltage is allowed to drop, the longer it takes for die voltage to recover to a level that is acceptable to the load. Voltage, frequency and time are intertwined. Adjusting one will have an effect on the others.

Article 700 of the National Electrical Code requires emergency power to be available to the load within 10 seconds of the normal power outage. This should include any time delay to engine start, t ime for cranking, time for acceleration to rated speed, time for the transient frequency and voltage dip, t ime for recovery to near rated speed and as stated in my proposal, time to reach 90 percent of rated voltage.

If manufacturers who use these 2V/hertz or adjustable V/her tz voltage regulators allow the voltage to drop too low, the voltage will never recover to a 90 percent of rated level within 10 seconds. The argument is not about die relationship of kW and voltage and power factor, but whether or not the EPS is capable of delivering the specified amount of power in an acceptable period of time.

19

N F P A 110 - - F 9 5 R O C

Rated load tests at rated power factor must be per formed on tile EPS by the manufacturer prior to shipment. Otherwise thejobsi te acceptance test must be per formed at rated power factor. Using a resistive load bank will still demand maximum power from the engine, which is really the part of the generator set that is under scrutiny in this test.

The load bank must be connected to the load side of the generator main line circuit breaker. When voltage decreases, current increases. If the load bank is allowed to be connected directly to the generator main output terminals, the overcurrent protection system will not be tested. The breaker mayvery well trip under actual 100 percent full load application.

Many methods are available to accurately measure performance during this acceptance test. Voltage and time are of critical importance. Strip chart recorders, disturbance analyzers, tracing oscillographs can all capture this data, allowing the engineer to de termine if the EPS meets the requirements of the load. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The proposal addresses paragraph 5- 13.2.6 which is "installation acceptance," meaning a one-time test after installation of the EPS. While it is a difficult test, it does allow some tolerance in that there was no minimum voltage requi rement at the load terminals. Committee action in 110-53 established requirements that would increase EPS costs to an unreasonable level without commensurate benefits. Evidence of reasonable acceptabil- ity of the previous (existing) wording of 5-13.2.6 is that it has been in use for many years. So the committee to continue with an established procedure per Action on Comment 110-26 (Log #2). NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #2) 110- 26 - (5-13.2.6): Accept SUBMITTER: Frank Lewis, Whayne Power Systems COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: We recommend the proposal under consideration to chang~ this text not be adopted. SUBSTANTIATION: ff adopted, it will increase the cost of the EPS system to the end user without increasing the reliability or usefulness of the system. This requi rement does not consider today's higher performance engines. COMMITI'EE ACTION: Accept_ NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #4) 110- 27- (5-13.2.6): Accept SUBMITTER: Larry Hill, Thompson Power Corporation COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: The proposed s ta tement ".. .at a minimum of 90 percent rated terminal voltage..." is unclear. Does this mean (A) a generator set shall be ready to accept load with at least 90 percent terminal voltage at its terminals~, or (B) does it mean that generator terminal voltage shall not drop below 90 percent when full load is applied? If (B) see comment below. SUBSTANTIATION: A requi rement for the proposed " . . .minimum of 90 percent rated generator . . ." is unrealistic for today's higher performance engines and will just increase the cost of the EPS to the end user without increasing the reliability or usefulness of the system. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: MCDONALD: No recommendat ion made by submitter. See

Comment 110-26 (Log #2).

(Log #5) 110- 28 - (5-13.2.6): Accept SUBMITTER: Ken Green, ICM Power Systems' COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: This change would increase the cost of standby generators ' with no increase in reliability or usefulness to the system. It would not be in the publics best interest to make dais change. SUBSTANTIATION: None. COMMITI"EE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:




(Log #6) 110- 29 - (5-13.2.6): Accept SUBMITTER: Farrell Bird, Pape Bros., Inc. COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: In the projects we've bid, this requirement isn't needed for proper application and performance of most standby systems. This requi rement will increase the costs of standby systems for the owners. SUBSTANTIATION: None. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:




(Log #7) 110- 30 - (5-13.2.6): Accept SUBMITTER: BiUJohnston, Fabco Equipment, Inc. COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Add new text as follows:

"As a minimum for acceptance testing, the EPS shall be capable of accepting 100 percent of the nameplate kW at a minimum of 90 percent rated generator terminal voltage at 10 seconds after start initiation." SUBSTANTIATION: This requi rement is unrealistic for todays high performance engines and will just increase the cost of the EPS systems to the end user without increasing the reliability of usefulness of the system. COMMITI'EE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: MCDONALD: See Comment 110-26 (Log #2).

(Log #8) 110- 31 - (5-13.2.6): Accept SUBMITTER: Dennis Tarr, The Halton Company COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: We feel this requirement would inflate the cost of new installation without any greater reliability of effective- H e s s .

SUBSTANTIATION: None. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:




2O

N F P A 110 - - F 9 5 R O C

(Log #9) 110- 32 - (5-13.2.6): Accept SUBMITTER: Patrick Cooper, High Plains Power Systems COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Wording to be changed:

"As a m i n i m u m , for acceptance testing, file EPS shall be capable of accepting 100 pe rcen t of the namepla te kW at a m i n i m u m of 90 percent rated genera tor terminal voltage at I0 seconds after start initiation." SUBSTANTIATION: With tile added requ i rements of the EPA forcing the EPS into h igher pe r fo rmance e q u i p m e n t and now with tiffs p roposed regulation, the end user is only being forced to increase his costs wi thout increasing tile reliability or usefulness of tile system. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: MCDONALD: See C o m m e n t 110-26 (Log #2).

(Log #10) 110- 33 - (5-13.2.6): Accept $UBMITTER: Vaughn Beasley, Ring Power Corp. COMMENT ON PROPOSAL NO: 110-53

I RECOMMENDATION: Delete text. SUBSTANTIATION: No m i n i m u m voltage dip should be required. What is impor tan t is 100 percen t block load capability and recover. Any addit ional requi rements would unjustifiably cost owner more money to mee t this requirement . Heal th care ~cili t ies have no problem with correct s tandard -vote NO. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #11) 110- 34- (5-t3.2.6): Accept SUBMITTER= Charles M. L a m p m a n , Ringhaver Equ ipment Co. COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Delete proposed wording:

"As a min imum, for acceptance testing, the EPS shall be capable of accept ing 100 ~ercent o f the namepla te kw at a m i n i m u m of 90 percent rated genera tor terminal voltage at 10 seconds after start initiation." SUBSTANTIATION: This r equ i r emen t is unrealistic for todays h igher per formance engines and will increase cost without any • "~ssociated user benefit. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #12) 110- 35 - (5-13.2.6): Accept SUBMI'I~ER: Ed Cullen, Holt Company of Ohio COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: R e c o m m e n d no t adopt proposal changes. SUBSTANTIATION: Requiring EPS to accept 100 percent namepla te kw at 90 percent voltage is unnecessary with today's h igher pe r fo rmance engines and will result in increased costs to the EPS owner without increasing reliability or usefulness of system. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBER$ ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #40) 110- 36 - (5-13.2.6): Accept SUBMITTER: Gerry Held, Mac Allister Engine Power COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Revise text as follows:

"Acceptance Testing. Accepting 100 percent of namepla te KW at a m i n i m u m of 90 percent rated genera tor terminal voltage at 10 seconds after start initiation." SUBSTANTIATION: The r equ i remen t is unrealistic for today's h igh per fo rmance engines and will j u s t increase the cost of emergency power system without increasing tile reliability. COMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 15 NEGATIVE: I NOT RETURNED: 2 DeMoss, Strasser


(Log #41) 110- 37 - (5-13.2.6): Accept SUBMITTER: Paulo E. Guardia, Pantropic Power Products, Inc. COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Delete "at a m i n i m u m of 90 percent rated genera tor terminal voltage." SUBSTANTIATION: Tile new proposed text will substantially and unnecessari ly increase the cost of the EPS system to the end user. Tile m a x i m u m allowable voltage dip at file t ime the load is applied should be a funct ion of the connec ted load tolerance to voltage variation and is taken into account when the EPS system is designed. Systems with mult iple transfer switches set at different transfer intervals will never see a 100 percent system KW block load. Also, 100 percent genera tor namepla te KW rating may have been oversized 20, 30 or even 50 percent of file system KW demand . The new proposed text does no t consider these industry s tandard design PCractices.

OMMITrEE ACTION: Accept. NUMBER OF COMMITTEE MI~MBER$ ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #45) 110- 38 - (5-13.2.6): Accept SUBMITTER: Daniel Barrios, West Texas Power Systems COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Revise text as follows:

"As a m i n i m u m , for acceptance testing, file EPS shall be capable of accepting 100 percent of the total essential/crit ical load at a m i n i m u m of 90 percent rated genera tor terminal voltage at 10 seconds after start initiation." SUBSTANTIATION: The 100 percen t rated kw would require substantial oversizing of both engine and generator . A diesel engine loaded 50 percen t or less is no t r e commended . COMMI'ITEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 15 NEGATIVE: 1 N O T RETURNED: 2 DeMoss, Strasser


(Log #47) 110- 39 - (5-13.2.6): Accept SUBMITTER: Paul M. Counahan , Beckwith Machinery Company COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: Delete:

"As a min imum, for acceptance testing, tile EPS shall be capable of acc'eptable 100 pe rcen t of tile namepla te kW at a m i n i m u m of 90 percent rated genera tor terminal voltage at 10 seconds after start initiation."

Change to a realistic value f l a t can be achieved in a cost effective manner .

21

N F P A 110 - - F95 R O C

SUBSTANTIATION: The standard, as proposed, is an unrealistic performance standard for modern , high performance engines that will substantially increase system cost without reliability improve- ment. COMMITTEE ACTION: Accep~ NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #48) 110- 40 - (5-13.2.6): Accept SUBMITTER: Del Charlson, Foley Tractor Co. COMMENT ON PROPOSAL NO: 110-53 RECOMMENDATION: We request you NOT accept this proposed change. SUBSTANTIATION: Proposed change is not compatible for todays higher performance engines and will not benefit the end user. If accepted, this will in turn, increase the cost of the EPS system without increasing the reliability of the overall system. COMMITTEE ACTION: Accept. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


EXPLANATION OF NEGATIVE: MCDONALD: No recommendat ion made by submitter except in

"Substantiation." See Comment 110-26 (Log#2).

(Log #24) 110- 41 - (64.2.1): Accept in Principle SUBMITTER: Ronald M. Smidt, New Hanover Regional Medical Center COMMENT ON PROPOSAL NO: 110-60 RECOMMENDATION: Add the following to 6-4.2:

"Connected EPSS load is def ined as the maximum actual demand likely to be produced by the connected load." SUBSTANTIATION: Some authorities having jurisdiction use connected load or feeder calculations described in NFPA 70 to determine compliance with 6-4.2. This creates an unachievable goal in which the "connected load" may actually be larger than the generator. One-half of the "connected load" may be larger than the actual maximum demand.

I COMMIT[EE ACTION: Accept in Pr!nciple. 1. In submitter 's recommendat ion, change "Connected" to read

"Total." 2. Add submitter 's recommendat ion as a NOTE under 6-4.2.

COMMITTEE STATEMENT: 1. To be consistent with Committee Action No.1 in proposal 110-60.

2. To conform to NFPA Style Manual. NUMBER OF COMMI'IWEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITrEE ACTION:


(Log #3) 110- 43 - (64.2.2): Accept in Principle SUBMITTER: Dan Chisholm, Motor & Generator Institute COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Revise text as follows:

"An annual test should be performed on diesel powered EPS units that have shown evidence of wet stacking. This test should be performed at 80 percent of the continuous power nameplate rating less any applicable derat ing factor for a min imum of 4 hours." SUBSTANTIATION: First of all the problem with excess carbon buildup and wet stacking varies with engines, their environment and the type of load that is connected. Additionally, units that are "under loaded" but do no t show evidence of wet stacking should not be subjected to such a rigid test that could possibly cause failure of a ma jor EPS par t that might not have occurred if left alone to run at its p resent load.

The load test should only be suggested as an additional maintenance measure for diesel powered units.

The health care industry would be hit with another enormous bill to pay. Assuming there are 6500 hospitals in the United States with an average of 2.5 units, and that 90 percent would have to bring in a portable load bank to perform this test, over $11,000,000 wouldbe spent annually. This figure could easi lydoubie with the ensuing repair costs and rentals of portable generators while repairs were being performed.

Ideally, if it is our objective to improve the conditions of EPSS, their reliability and service to the public, we should consider updat ing our standards for those EPSS installations that are placed in service after the upcoming revisions to the document . COMMITTEE ACTION: Accept in Principle.

1. Add an Exception to 64.2 to read as follows: "Exception: Generator sets that are run until operating tempera-

ture is reached, but can not be loaded to 30 percent of nameplate rating or 50 ~e rcen t of total EPSS load, and do not show evidence of wetstacking.

2. Revise new 6-4.2.2 to read as follows: "A procedure shall be per formed on diesel powered EPS units that

show evidence of wet stacking. This procedure shall be a load run, performed to at least 80 percent of the EPS nameplate rating, less any applicable derating factor, until the exhaust is clear of black smoke, but not less than 2 hours.

NOTE: Wet stacking is a field term indicating the presence of unburned fuel a n d / o r carbon in the exhaust system. Its presence is readily indicated by the presence of continual black smoke during engine-run operation." COMMITYEE STATEMENT: 1. Exception is added because some facilities can not load their generators within the 30/50 percent criteria but are not experiencing problems with their generators that results in wetstacking. Wetstacking is a major pre-indicator of generator inability to operate efficiently under load.

2. Since a major generator failure top ick up load is due to wetstacking, a procedure is added for those facilities that experience this problem. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #43) 110- 42- (64.2.1 (New)): Accept in Principle SUBMITTER: Douglas S. Erickson, American Hospital Association COMMENT ON PROPOSAL NO: 110-60 RECOMMENDATION: Add new textas follows:

64.2.1 Connected EPSS load is def ined as the maximum actual demand load likely to he produced by the connected load. SUBSTANTIATION: Some authorities having jurisdiction use connected load or feeder calculations described in NFPA 70 to determine compliance with 64.2. Adding this new wording will assist health care facilities, with numerous duplexed and back up systems and components to meet the requirements for system testing. COMMITI'EE ACTION: Accept in Principle. COMMITTEE STATEMENT: See Comment 110-41 (Log #24) as comment is the same. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #13) 110- 44 - (6-4.2.2): Accept in Principle SUBMITTER: Lawrence A. Bey, Onan Corp. COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Move to t h e A p p e n d i x and revise the wording to say:

"An annual test should be considered at 80 percent EPS nameplate rating." SUI~TANTIATION: See Smidt and Watters negative comments in the ROP. COMMITFEE ACTION: Accept in Principle.

See Committee Action on Comment 11043 (Log#3). COMMII~'EE STATEMENT: Committee Action on Comment 110- 43 (Log #3) addresses this issue of load tes t ing the EPSS. NUMBER OF COMMITTEE MEMBERS ELIGIBLETO VOTE: 18 VOTE ON COMMITTEE ACTION:


22

N F P A 110 - - F 9 5 R O C

110- 45 - (6-4.2.2) : Reject (Log #26) SUBMITTER: Ronald M. Smidt, New Hanover Regional Medical Center COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Revise proposed text to read as follows:

"An annua l test shall be p e r f o r m e d a t 50 percent EPS namepla te rating for a m i n i m u m of 3 hours annually, if, m i n i m u m test ing s tandards oud ined in 6-4.2.1 were not m e t for a m i n i m u m of 8 of 12 required mon th ly tests." SUBSTANTIATION: Standard as p roposed by the commit tee is unreasonable . Requires the expense of a load bank and rental

enera tor in the "one generator" facility. There is no empirical data own to the submi t te r to demons t ra te tha t the r equ i r emen t

proposed 110-62 will help keep the diesel f rom building up carbon deposits. COMMI'ITEE ACTION: Reject.

See Commit tee Action on C o m m e n t 110-43 (Log #3). COMMITTEE STATEMENT: Commit tee action on C o m m e n t 110-43 (Log #3) addresses this issue of load testing the EPSS. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #27) 110- 46- (6-4.2.2): Reject SUBMITTER: Fletcher G. Hawkins, Anderson Area Medical Center COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Revise text as follows:

"An annua l test shou ld be pe r fo rmed on diesel powered EPS units. This test should be pe r fo rmed at 80 percent of the cont inuous power namepla te rating (less any applicable dera t ing factor) for a m i n i m u m run t ime of 4 hours." SUBSTANTIATION: First, the load test should be directed only to diesel-powered pr ime movers, as o ther fuels do no t pose the carbon- build-up problem that diesels do.

Second, we mus t ask exactly what is to be ga ined by a manda to ry annua l full load test as opposed to what such testing will cost. For the past twenty years or so, hospitals have been advised to install larger genera tor sets than necessary in order to provide for "future expansion." Now, with the shift ing emphas is f rom inpat ient to outpat ient care, hospitals are no t expand ing as designers t h rough they would, and m a n y hospitals now own genera tor sets loaded less than half of their namepla te capacity. This means that the only way for mos t hospitals to mee t a r equ i r emen t of 100 percen t loading will be to bire load banks to be b rough t in. Our last load bank test cost us in the ne ighbo rhood of $4000. We pe r fo rmed the test because .of a p rob lem we found du r ing a rout ine test ~nde r 10ad. Further, we ran the test for fou r hou r s , j u s t to make sure tha t all the bus were out of the system.

Third, this p roposed r equ i r emen t does not address an emerg ing problem, that o f neu t r a lhea t ing . As more and more critical e q u i p m e n t becomes microprocessor-based, neutral hea t ing on the emergency circuit becomes more of a problem. Resistive load banks are unable to s imulate the increasing microprocessor loading that causes neutral heating.

We feel that a 100 percent load test run for four hours is a GOOD IDEA, and would r e c o m m e n d that any insti tution that finds a problem dur ing rout ine testing that would require a load bank to properly test the system s h o u l d r u n such a test. However, to require s u c h a test on an annua l basis simply to verify that a piece of e q u i p m e n t can per form to its fullest capacity when it will never be required to do so in normal operat ion over its useful life as foolish and wasteful, and perhaps even d~mgerous. It is the equivalent of requi r ing the average driver to annual ly run h i s / h e r vehicle on the interstate at speeds in excess of 120 mi4es per hou r and then suddenly per form an emergency s top , jus t because file vehicle is des igned to do so.

A reasonable estimate of costs for hospitals in our state to comply with dtis r equ i r emen t is in excess o f a $250,000 PER YEAR. This translates to an increase in the cost of heal thcare for South Carolinians of approximate ly $2,000,000 per year. We fail to see that the minuscule e n h a n c e m e n t o f mach ine per fo rmance and reliability is worth the significant costs and hardships posed to hospitals and the public.

If we are looking to improve ES per fo rmance and reliability, we should upgrade our requ i rements for systems yet to be installed. The requ i rements shou ld not be relwoactive.

COMMITTEE ACTION: Reject. See Commi t tee Action on C o m m e n t 11043 (Log #3).

COMMITrEE STATEMENT: Commit tee action on C o m m e n t 110-43 (Log#3) addresses this issue of load t e s t i ng the EPSS. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #44) 110- 47- (64.2.2): Accept SUBMITTER: Douglas S. Erickson, American Hospital Association COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Delete p roposed text and add to Table A-6- l (a) i tem 7(h): '°Test EPS at m i n i m u m 80% namepla te rating for four (4) hours once very three (3) years." SUBSTANTIATION: The issue of testing an EPS as proposed will require owners of level one or two emergency power supply systems t o l o a d bank the engine set on an annua l basis. The commit tee offers no substantiat ion as to the real problem, such as generators which have failed to start as a result of carbon or those which have automatically shu t down as a result of pr ime mover problems result ing f rom testing at the previous acceptable levels of 30 percent of namepla te or 50 percent of the total connec ted load. ff some manufac ture rs require 100 percent loading once a year, this is a specific equ ipmen t r equ i r emen t not a s tandard for all eng ine sets. Health care facilities are continually test ing their genera tors and doing the best they can to assure the system will come on line when called to do so. The extra expense for the 100 percen t namepla te annua l test is an unnecessary expense unless the technical committee can provide significant justification. COMMITTEE ACTION: Accept.

See Commit tee Action on C o m m e n t 11043 (Log #3). COMMITTEE STATEMENT: Commit tee Action on C o m m e n t 110-43 (Log #3) addresses this issue of load testing the EPSS. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #46) 110- 48- (64.2.2): Reject SUBMITTER: Thomas W.Jaeger , Gage-Babcock & Associates, Inc. COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Revise the proposed test to 50 percen t EPS namepla te rating. SUBSTANTIATION: Tile r equ i r emen t to test at 100 percen t is too restrictive, especially for facilities that install genera tors for future expansion. This would require expensive load banks. No evidence has been proven to d o c u m e n t that carbon build up is a serious problem, or that testing at 100 percent will clean out the carbon. If carbon build up is a problem, there needs to be alternatives provided in lieu of the 100 percent test. COMMITI'EE ACTION: Reject.

See Commit tee Action on C o m m e n t 11043 (Log #3). COMlVl/TrEE STATEMENT: Commit tee Action on C o m m e n t 110-43 (Log #3) addresses dais issue of load testing the EPSS. NUMBER OF COMMITrEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


(Log #25) 110- 49 - (6-4.2.2, Table A-6-1 (a)): Reject SUBMITFER: Ronald M. Smidt, New Hanover Regional Medical Center COMMENT ON PROPOSAL NO: 110-62 RECOMMENDATION: Delete proposed text.

Add to Table A-6-1 (a) i tem 7(h): "Test EPS at m i n i m u m 80% Namepla te 4 hours (every 3 years)"

23

N F P A 110/111 - - F95 R O C

SUBSTANTIATION: The issue of testing an EPS as written by the commit tee proposal requires the owners of level one or two emergency power supply systems load bank their systems annually. If the in tent of the commit tee is to assure that systems will accept full load then p roposed 11~ 6-4.2.2 falls short . The fact is that u n d e r the circumstances that these systema accept full load we are speaking of actual facility load at t r ibuted to tha t emergency generator .

The r equ i r emen t to load the genera tor to assure tha t the mach ine is operat ing at peak belongs in Table A-6-3.1 (a). ff facilities are going to have to load the e q u i p m e n t to achieve reasonable assurance that it is capable of accept ing load t hen we need to be real world and require this every 3 years. T he d o c u m e n t (110) needs to specify a t ime vs load to assist the facility operator. COMMITTEE ACTION: Reject.

See Commit tee Action on C o m m e n t 110-43 (Log #3). COMMITTEE STATEMENT: Commit tee Action on C o m m e n t 110-43 (Log #3) addresses this issue of load t e s t i ng the EPSS. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


P ~ T f f

(Log #1 ) 111- 1 - (3-3.3): Reject SUBMITTER: Vic D. H u m m , Vic H u m m & Associates COMMENT ON PROPOSAL NO: 111-2 RECOMMENDATION: Revise 3-3.3 and add 3-3.1 to read:

"When emergency power is suppl ied to the bui lding fire a larm system branch circuit, a larms in accordance with $-3.2 shall be connec ted to the bui lding fire a la rm as supervisory alarms." SUBSTANTIATION: Note similar wording is already in NFPA publicat ions (NFPA 17-1990, 2-6.5; NFPA 17A-1990, 2-5.2.3; and NFPA 90A, 4-4.4.2). Thus dais fo rmat has been voted and accepted by the public in previous and cur ren t issues. Also a s tored energy system loses its pr imary power the ou tpu t is the same and the bui lding fire a larm does no t show a t rouble condition. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: Contacts are available to add remote signals by user. It is outside the scope of this commit tee to add mon i to r ing of signals. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:

AFFIRMATIVE: 18

(Log #20) 110- 50 - (A45 .1 (New)): Accept in Principle SUBMITTER: Lawrence A. Bey, O n a n Corp. COMMENT ON PROPOSAL NO: 110-30 RECOMMENDATION: Add to Appendix as follows:

"The design objective shou ld be selective coordinat ion for all levels of available short-circuit current . However, the in ten t is no t to rule out the use of overcurrent devices with ins tantaneous magnet ic u'ips. If devices with ins tan taneous trips are to be used, the short-circuit s tudy should show reasonably minimal , in die design eng ineer ' s j u d g m e n t , overlap or mis-coordinat ion between devices. In these types of OC, Ss, selectivity is possible where the a.wailable short-circuit cur ren t at a downst ream OCD does n o t exceed the ins tan taneous pickup sett ing of the nex t OCD upst ream. Refer to ANSI/IEEE 242 for fur ther information." SUBSTANTIATION: It should be the objective to achieve the h ighes t practical level of selective coordinat ion possible, wi thout rul ing out the use of overcurrent devices with ins tan taneous magnet ic trips. See my negative c o m m e n t in the ROP. COMIVHTrEE ACTION: Accept in Principle.

See Commit tee Action on C o m m e n t 110-16 (Log #21). COMMITTEE STATEMENT: Commit tee Action on C o m m e n t 110-16 (Log #21) is considered to address the issue of coordinat ion of the t r ipping o f overcurrent devices. NUMBER OF COMMITTEE MEMBERS ELIGIBLE TO VOTE: 18 VOTE ON COMMITTEE ACTION:


24

Documents

Report of the Committee on PART I (Log #22) SUBMITrER