Skid mounted equipment grounding

[Silver Surfer]

My company is installing new flue gas scrubber equipment. Several of the larger pumps (1500-3500hp) are skid mounted. The contractor has grounded two diagonal corners of each skid to the ground grid with 4/0 solid copper conductor. My concern is that the 4kV motor frames are dependent upon the bolts holding them to the steel skid for an effective ground path. Is this something to worried about?

 

[celtic]

If you are "retired", why would you be "worried"?

 

[iwire]

My concern is that the 4kV motor frames are dependent upon the bolts holding them to the steel skid for an effective ground path.

The connections to the grounding grid are optional.

The effective ground fault path is required to be run with the supply conductors.

 

[iwire]

with 4/0 solid copper conductor.

4/0 SOLID?

 

[peter d]

Yes Bob, 4/0 solid is available everywhere....WalMart, Target, your local convenience store. Sheessh, you should know that by now....

 

[iwire]

Yes Bob, 4/0 solid is available everywhere....WalMart, Target, your local convenience store. Sheessh, you should know that by now....

Thats good, I think I will send back the 4/0 stranded at Woods Hole and have you run 4/0 solid around the generator.

 

[peter d]

Thats good, I think I will send back the 4/0 stranded at Woods Hole and have you run 4/0 solid around the generator.

Sure, no problem. Right after I run some more Mono Systems plug mold.

 

[LarryFine]

Yes Bob, 4/0 solid is available everywhere....WalMart, Target, your local convenience store. Sheessh, you should know that by now....

Nice to know that we no longer need Stakons to connect 4/0 wires to receptacles and switches.