additional question, same subject
additional question, same subject
Similar question, same subject:
From the ASCO site:
...The ASCO Series 185SE Residential Service Entrance Power Transfer Switch combines the series 185 automatic transfer switch with circuit breaker disconnect device for the normal source. An additional circuit breaker for the emergency source in optional. In addition, main jumper is provided to connect both the neutral and ground conductors in accordance with NEC requirements for service entrance equipment. For use on Optional Standby Systems as defined by NFPA 70: National Electrical Code (NEC)...
I have a single building installation with a "Optional Standby" generator (not an "emergency" generator).
The Normal power is from a utl xfmr (480v, 3ph, 3w).
The generator is (480v, 3ph, 3w) and has a main ckt bkr.
I intend to intall a service rated 3ph, 3w, ATS. This ATS will have a ckt bkr on the normal power connection to meet NEC service entrance req'mts.
Two questions;
1. Per code, do I need to add the "optional" ckt bkr for the standby power connection to the ATS?
2. The load is a 480v, 3ph, 3w system. I am installing 3 phase conductors and a ground conductor from each source to the ATS, no neutral conductor. The ground will be connected/bonded to the "grounded" neutral at each source. Is that correct? (I am being told by others I have to run the neutral from the xfmr to the ATS and ground it there, not sure about the generator side).
Thanks for your help