The North East Retail Main Switchboard MSRN1C is rated for 4000A at 480/277V, 3-phase, 4-wire with a 65KAIC short circuit rating. Power feeds from the utility transformer into a 4000A, 3-pole main device and busbar distribution. Six 200A 3-pole fused or breaker units with meters supply downstream loads alongside a 1200A 3-pole unit and an 1800A 3-pole unit. Two additional spare switch positions are included in the configuration.
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