Selective Coordination Panel

Meeting the Demands of the New 2008 NEC® Code

Due to recent NEC® changes (implemented in the 2005 code cycle and refined in the 2008

code cycle), a requirement to provide selective coordination emerged in a number of critical

circuits. The NEC® now requires selective coordination for Emergency (700.27), Legally

Required Standby (701.18), Essential Electrical Systems (517.26) and Critical Operations

Power Systems (708.54). As more states adopt the 2005 and 2008 NEC®, consulting/

specifying engineers will be required to provide selective coordination as part of their

electrical systems design in the construction or retrofitting of hospitals, office buildings,

commercial buildings, critical power applications and similar installations.

Due to recent

NEC® changes, a

requirement to

provide selective

coordination

emerged in a

number of critical

circuits.

What is selective coordination?Selective coordination requires that the protective device nearest a fault trips before any upstream protective device, assuring critical loads connected in parallel to the fault are not interrupted. This can be accomplished with either circuit breakers or fuses, but fused solutions are the easiest way to implement, and more importantly, ensure selective coordination during the life of the installation. Doing this with circuit breakers is initially costly and is susceptible to degradation over time, eventually losing its selective coordination. Fused solutions are the easiest and most cost effective way to provide selective coordination with 2:1 ratios using Amp-Trap 2000® fuses and will ensure the selective coordination over the life of the installation.

Market Requirements

Example of a Coordinated System

A fault anywhere on this system will have the downstream fuse open before any upstream fuse could begin to melt.

Hospital, 2nd floor, south wing

A6D400R

OR and ICU A6D200R

Intensive Care Unit circuits – ATDR30

Operating Room circuits – ATDR30

Fault

Features:•UltraSafeTM fuse holders with indication plus

Class CC fuses make for easy coordination and identification of blown fuses

•Branchcircuitbreakersprovidecircuitisolation

•Compactsize

•Removablebackpantoallowforeasierinstallation by contractors

•Beadedgroundbar

•Neutralbarwithset-screwterminations

•MLO(mainlugsonly)terminations › Optional molded case circuit breakers

•100A,200Aor300Acoppermainbus

•12to42circuits

•NEMAType1enclosurewithsurfacemounttrim

Ferraz Shawmut’s fused Selective Coordination Panel is a UL67 listed panelboard that utilizes our market leading class CC UltraSafe™ fuse holders with easy to see blown fuse indicators (fuses provided separately to suit specific loads during installation). Using Ferraz Shawmut’s Amp-Trap 2000® class CC fuses ensure minimal fuse let-thru energies and make it easy to provide system coordination with our easy 2:1 coordination ratios. The use of fuses in the panel also allows us to provide a higher SCCR (short circuit current rating) that the market is now demanding in contrast to a typical circuit breaker panel.

* When protected by upstream A6D 100A max, AJT 200A max or A4J 200A max, otherwise 10kA.

** When protected by upstream A6D 100A max, AJT 400A max or A4J 400A max, otherwise 14kA.

SCPPrefixSCP=

Selective Coordination

Panel

2Voltage

2=120/208V, 3P, 4W3=120/240V, 1P, 3W4=277/480V, 3P, 4W

MMain

M=MLOB=Molded

Case Circuit Breaker

2Main Amperage

1=100A2=200A3=300A

30Branch Circuit

Amperage30A

42# of Circuits

121824303642

GGeneral Purpose

EnclosureType 1 Only

CCType of Branch Circuit Fuses

CCJ

Catalog #VoltageRating SCCR

Branch Circuit Amp

Rating

Copper Main Bus

Amp Rating# of

Circuits Dimensions

SCP2M13012GCC 120/208V 200kA* 30 100 12 28”W X 20”H X 6”D

SCP2M13018GCC 120/208V 200kA* 30 100 18 28”W X 23”H X 6”D

SCP2M23024GCC 120/208V 200kA* 30 200 24 28”W X 30”H X 6”D

SCP2M23030GCC 120/208V 200kA* 30 200 30 28”W X 33”H X 6”D

SCP2M23036GCC 120/208V 200kA* 30 200 36 28”W X 36”H X 6”D

SCP2M23042GCC 120/208V 200kA* 30 200 42 28”W X 39”H X 6”D

SCP3M13012GCC 120/240V 200kA* 30 100 12 28”W X 20”H X 6”D

SCP3M13018GCC 120/240V 200kA* 30 100 18 28”W X 23”H X 6”D

SCP3M23024GCC 120/240V 200kA* 30 200 24 28”W X 30”H X 6”D

SCP3M23030GCC 120/240V 200kA* 30 200 30 28”W X 33”H X 6”D

SCP3M23036GCC 120/240V 200kA* 30 200 36 28”W X 36”H X 6”D

SCP3M23042GCC 120/240V 200kA* 30 200 42 28”W X 39”H X 6”D

SCP4M13012GCC 277/480V 200kA** 30 100 12 28”W X 20”H X 6”D

SCP4M13018GCC 277/480V 200kA** 30 100 18 28”W X 23”H X 6”D

SCP4M22024GCC 277/480V 200kA** 30 200 24 28”W X 30”H X 6”D

SCP4M23030GCC 277/480V 200kA** 30 200 30 28”W X 33”H X 6”D

SCP4M23036GCC 277/480V 200kA** 30 200 36 28”W X 36”H X 6”D

SCP4M23042GCC 277/480V 200kA** 30 200 42 28”W X 39”H X 6”D

3-PhaseandClassJFuse

configurations are available!

Please consult factory.

For more on Selective Coordination Panels, visit our website at us.ferrazshawmut.com.

374 Merrimac Street Newburyport, MA 01950T: 978-462-6662 F: 978-462-0181

88 Horner AvenueToronto, Ontario, Canada M8Z 5Y3T: 416-252-9371 F: 416-252-6572

© 2008 Ferraz Shawmut. All rights reserved.

BR-SCP-001 / Q5000 / 8.08 / STASSOC

A relentless pursuit of protection for electrical components, systems - and the people who use them. Ferraz Shawmut is an international company manufacturing the widest range of circuit protection solutions in the electrical industry. Drawing on a century of experience - and an ongoing commitment to critical research in electrical safety - we provide industrial, commercial, and OEM customers with innovative products and technical support teams to increase effectiveness, simplify applications, and enhance productivity. Learn more about our circuit protection solutions at us.ferrazshawmut.com.

Other Circuit Protection Products from Ferraz Shawmut:A wide range of circuit protection products are available including:

Fusible Shunt Trip (Elevator Switch)

Amp-Trap 2000® Class CC T-D Fuse, 600V

Fuserbloc - Fusible Disconnect Switch

FBJATDR30