New Standby Emerg. Generator for a residence.

[Luis De Castro]

Doing engineering plans for the installation. The generator is a new 60KW generac 120/240v single phase with floating neutral. I understand that is a non-separetely derived system. Is t ground rod required. The automatic transfer switch is a2p- 400a with a 400a circuit breaker main. already installed in the house. The generator breaker will be a 2p-300a. IM a little confused about thye grounding

 

[augie47]

The determination of SDS vs non SDS is based on whether the neutral is switched in the transfer switch.
If your TS is a two pole with solid neutral connections then the system is not and SDS and the generator neutral will be floating and have a EGC from the system to the generator.

 

[tom baker]

And please review generator definitions in Art 700-791-702. For a residence you are designing an optional standby system.

 

[gadfly56]

And please review generator definitions in Art 700-791-702. For a residence you are designing an optional standby system.

Not to mention, 60kw is a heck of a lot of e-power for a residence.

 

[roger]

Not to mention, 60kw is a heck of a lot of e-power for a residence.

Not to mention why does a Generac installer need engineered drawings?

 

[tom baker]

Many are confused about generator grounding and bonding. Mike Holt once was working with generac about ground rods at generators, he gave up on that.