Ground Fault Protector

[john37]

I have a project that is located in a flood zone. I'm feeding a new 480/277V, 3Ph,4W panel from a switchboard located in another building. When I run the feeder I have to put a 3P100A disc switch when the feeder daylights on the outside of the bldg. I have been advised to put a ground fault protector on the disconnect switch. I'm not sure how this is done. Can I get a 3P100A disc switch with ground fault protector inside it? or how am I suppose to ground it being that I'm in a flood zone? Our local ordinance states "distribution power shall be located above the regulatory flood elevation or in a waterproof enclosure or barrier with ground fault protector on the disconnecting means".

 

[Buck Parrish]

I DON'T THINK YOU NEEDE THE GROUND FAULT BREAKER.
THINK ABOUT IT, WIRE RAN OUTSIDE IS GOING TO GET WET SOME WHERE ALONG THE LINE EVEN IF NOT IN A FLOOD ZONE.
I THINK IF YOU USE thhn /thwn YOU WILL BE FINE.
MAKE SURE YOUR TRENCH IS DEEP ENOUGH
THE W IN THWN STANDS FOR WATER PROOF

 

[Cavie]

You need to run ground wire from other building. Install ground rod or UFER. Seperate N and G. Flood zone has nothing to do with it. 100 GFI breaker.($$$$$.) The GFI requirement is locol code not NEC.

 

[brian john]

Ground Fault Protection can be provided by the use of a Shunt Trip CB and a Zero Sequence CT with GFP relay relay. Search the GE web site for ITI BGFL I assume you would want a GFP relay with settings in the 10-100 amp range?

Not sure how the AHJ would like this but you could use a standard split core CT 100/5 and a current relay with a shunt trip CB.

GE web site is tough I do have a link on another PC, so if you have issues IM me.