Ground Fault at 208V switchboard
Ground Fault at 208V switchboard
(OP)
The lighting switchboard is derived via 480V/208V transformer from 480V main switchboard. The transformer is DYn and the secondary is solid grounded.
I'd like to use 208V line-line voltage to small motor and 120V phase-neutral to lighting fitting each.
Both feeder breakers on lighting switchboard(208V,3ph) will open against ground fault ?
I'd like to use 208V line-line voltage to small motor and 120V phase-neutral to lighting fitting each.
Both feeder breakers on lighting switchboard(208V,3ph) will open against ground fault ?






RE: Ground Fault at 208V switchboard
RE: Ground Fault at 208V switchboard
Elsewhere in the world other rules may apply, but your voltages strongly suggest that the NEC or a very similar code will govern.