W-C-375-SUP-2 Circuit Breakers, Molded Case; Branch Circuit and ServiceThis specification covers the general requirements and test procedures for molded case circuit breakers which fall within the general parameters specified in table XVI which are specifically designed to provide service-entrance, feeder, meter-service, or branch circuit protection and rated at not more than 4,000 amperes and 600 volts ac, 60 hertz Hz see 3.1 and 6.1.

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W-C-375E

TABLE xIII. Available current in test circuit.

Frame rating	RMS symmetrical
	1 pole	2 pole		3 pole
		Individual	Common	Individual	Common
100A maximum 250 V maximum 100A maximum 251-600V 101-800A any voltage 801-1,200 any voltage 1,201-1,600 1,601-2,000 2,001-2,500 2,501-3,000 3,001-4,000	5,000 10,000 10,000 --- --- --- --- --- ---	5,000 10,000 10,000 14,000 14,000 14,000 20,000 25,000 30,000	5,000 10,000 10,000 14,000 20,000 25,000 30,000 30,000 45,000	4,330 1/ 8,660 1/ 2/ 8,660 1/ 2/ 12,120 1/ 2/ 14,000 14,000 20,000 25,000 30,000	5,000 10,000 10,000 14,000 20,000 25,000 30,000 35,000 45,000

1/ This value is the current available when using two legs of the 3-phase circuit indicated under "Common".

2/ For the 277/480 volt rating, the current indicated for 2-pole under "Individual" shall be used.

TABLE xIV. Short-circuit operations.

Poles

Frame rating

Circuit breaker-AC

voltage rating

Operations by each pole

Common operations

Total number of operations

O (see 6.6.2) O

All All All All

0-1200A All

0-1200A

1201-Up

All

0-1200A

1201-UP

120, 240, 277, 480, or 600

120/240 (tested in pairs)

240,480, or 600

120/240

277/480

10/30

240, 480, or 600

120/240

277/480

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