ECN Forum Forums Code Related Discussion NEC & other Code issues Fire Pump Transfer Sw.

George]
The Generators a Y The power Co, Feeds a Y

Both 277/ 480.
Generator Neutrals Grounded at the Gen . Set
Power co. Requires a Neutral per Code Even thought its a 480 3 phase Because a Neutrals present at the transformer.
Thus it HAS to be brought in for Grounding purposes! The Question is Theres a EQuipment Gr. From Generator and a Neutral from Power Co. Service coming into a Transfer switch at the Fire pump set up from Ground only/