grounding generator

[mark m.]

I, RECENTLY INSTALLED THE WIRING FOR MOBILE GENERATOR. THE GENERATOR FED A 3 PHASE 4000A MAIN BREAKER THAT IS ALSO LOCATED INSIDE THE MOBILE CONTAINER.WE FED FROM THE GEN TO THE BREAKER W/ (6)-535 RHW (LOCOMOTIVE WIRE) PER PHASE & NUETRAL.
MY QUESTION IS ABOUT THE GRD. DO I SIZE IT ACCORDING TO SIZE OF THE FEEDERS(4-3 0) OR DO I SIZE IT TO SIZE OF THE BREAKER(500MCM)?

 

[dereckbc]

Re: grounding generator

Depends on if the genset is SDS or not. SDS requires a GEC and EGC's. GEC sized per 250.66, EGC's sized per 250.122

Genset is not SDS only EGC sized per 250.122

Please turn off the CAPS

 

[mark m.]

Re: grounding generator

Sorry, not quite sure what SDS or EGS is short for?

 

[ryan_618]

Re: grounding generator

Originally posted by mark m.:
Sorry, not quite sure what SDS or EGC'S is short for?

Seperatley derived system, Equipment grounding conductor.

 

[mark m.]

Re: grounding generator

Thank you, you 've been very helpful. Hope to talk to you soon.