Switchboard SWB1056BP is rated for 480Y/277 volts, three-phase, four-wire service with a 3000 amp bus and a 65 kAIC fault current rating located at the level 1 head house. A feeder circuit breaker is specified with a 400 amp trip and 400 amp frame rating across three poles.
"SWB1056BP" 480Y/277V, 3PH, 4W 3000 AMP BUS, 65KAIC LEVEL 1 HEAD HOUSE 400AT 400AF 3P 1
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