[DieselElectric]

In this dentist im wiring up I need HCF cable for the patient care rooms. I've ran PVC under concrete to the chair locations for the rooms. Anyone know if I can just run a redundant grand threw the PVC or am I gonna get busted on inspection for not having my redundant ground
running threw my conduit. Should I have ran rigid conduit?

 

[walkerj]

Should have run rigid

 

[DieselElectric]

Any way around this now?

 

[walkerj]

Play it cool and hope the inspector is stupid.

It would work here...

 

[Bkessler]

Last dentist office I did I ran the green mc cable through a PVC under the slab for each chair.

 

[DieselElectric]

Bkessler I'm liking that idea. Although its 3/4 PVC and I have 3 circuits I need to get threw.

 

[Bkessler]

Bkessler I'm liking that idea. Although its 3/4 PVC and I have 3 circuits I need to get threw.

That way the exact location of your PVC stub out isn't as critical.

 

[dawgs]

Last dentist office I did I ran the green mc cable through a PVC under the slab for each chair.

That would be fine if its not slab on grade. If its on grade your screwed. Not sure but maybe they make hospital grade pvc jacketed mc?

 

[Bkessler]

That would be fine if its not slab on grade. If its on grade your screwed. Not sure but maybe they make hospital grade pvc jacketed mc?

What exactly does "slab in grade" mean?

 

[dawgs]

What exactly does "slab in grade" mean?

The slab was poured grade level. That's slab on grade. MC cable is not listed for burial, it's a code violation. If it was second story or a above it would be ok.

 

[walkerj]

Speaking of stupid inspectors.

Yesterday I had an inspection for a footer ground (UFER, CEE, whatever)

Super calls and says the inspector wants to talk to me.
Says to look at table 250.66 and says I need a 2/0 for 800A service based on 1000kcmil.
I say ok but look at 250.66 b. no larger than #4 is required.
He says ok I will pass it???

Mind you it is all of 2" down and to the left on the same page in the 2008 book.

This is the chief electrical inspector for East Baton Rouge Parish for longer than I have done electrical work.

This is an ongoing problem and really gets old.

These people need Charlie's Rule on the underside of their hats.

 

[Bkessler]

The slab was poured grade level. That's slab on grade. MC cable is not listed for burial, it's a code violation. If it was second story or a above it would be ok.

Are the conductors in mc cable individually identified for use in wet locations?

 

[walkerj]

Are the conductors in mc cable individually identified for use in wet locations?

More importantly, is the sheath rated for use in wet locations?

 

[DieselElectric]

Walker I agree that would def be a code violation. I was hoping I could run an isolated ground with the boat and use it as the redundant ground. Code just says needs another ground incase the original ground fails.

 

[dawgs]

Are the conductors in mc cable individually identified for use in wet locations?

No there not.

 

[Roger]

Code just says needs another ground incase the original ground fails.

No, the code says the metallic sheath must be recognized as an EGC and the secondary EGC will be an insulated wire conductor, 517.13(A) and (B)

Roger