ron
Senior Member
- Location
- New York, 40.7514,-73.9925
4 wire standby generator output and Y utility service is brought to a 3 pole XFER switch per 250.24(C). Does the XFER switch need to specified as 4 wire so there is an official place to terminate the grounded conductors?
Since the gen and utility will have a N-G bond at each source making them separately derived systems, does the ATS need to be 4 pole per 250.20(D) even though there are no 4 wire loads?
Since the gen and utility will have a N-G bond at each source making them separately derived systems, does the ATS need to be 4 pole per 250.20(D) even though there are no 4 wire loads?