Kitchen Island Receptacle through Slab

[frank_n]

I have to channel through a slab in order to feed receptacles for an island. Since the circuit will be GFCI protected, I believe I can use Column 4 of Table 300.5. According to the table, (under a building) has a clearance of 0. If this is the part of the table I can use, I can run a 3/4" PVC just under the slab and sleeve it with UF.

Anyone see any problems with this?

Frank

 

[480sparky]

.........If this is the part of the table I can use, I can run a 3/4" PVC just under the slab and sleeve it with UF.

Anyone see any problems with this?

Frank

I'd say so.



But would it not be easier to sleeve the UF with PVC instead?

 

[dcspector]

Is this installation technically under a building or should one follow in a trench below 2" of concrete ?

 

[dcspector]

I'd say so.



But would it not be easier to sleeve the UF with PVC instead?

I just caught that Ken...:grin:

 

[480sparky]

I just caught that Ken...:grin:

Sorry. I couldn't resisit that one. :roll:

 

[dcspector]

Sorry. I couldn't resisit that one. :roll:

Oh well my first post above was kinda of brain dead on my part.....

 

[frank_n]

Is this installation technically under a building or should one follow in a trench below 2" of concrete ?

Since it's a slab (no basement) wouldn't it be considered "under the building"?

Frank

 

[raider1]

Since it's a slab (no basement) wouldn't it be considered "under the building"?

Frank

Yes, it would be under the building.

Chris

 

[Jim W in Tampa]

In FL we been doing it this way for many many years and always passed. Most don't even use UF, just romex. It is tecnically outside of the building but normally very dry.

 

[jxofaltrds]

Since it's a slab (no basement) wouldn't it be considered "under the building"?

Frank

I say no. It is not underground so 300.5 does not apply.

I see nothing that prohibits your example.

 

[LarryFine]

Doesn't "under the building" require at least 2" of concrete?

Nonetheless, I have used PVC in a shallow channel in the concrete for the same purpose, but I did use UF for the sleeved section anyway.

 

[Jim W in Tampa]

I say no. It is not underground so 300.5 does not apply.

I see nothing that prohibits your example.

That area better be underground and out of building or we have a problem with many services that have been ran from meter can under slab to a MB panel in the middle of the building.

 

[dcspector]

Since it's a slab (no basement) wouldn't it be considered "under the building"?

Frank

Yes Frank it is. My post #3 was (as I mentioned earlier) a brain dead comment.....I was out in left field or some bodies field..all I know I was not "outstanding in my field"..:grin: Your install is cool. Sorry I was thinking of something different.

 

[jxofaltrds]

That area better be underground and out of building or we have a problem with many services that have been ran from meter can under slab to a MB panel in the middle of the building.

Jim

I am not sure that I understand you.

He is in the interior of the building if I read his post correctly.

Edit: He said "channel". So I think that he is inside the structure.

 

[e57]

With the limited info - one would hope it is not a post tension slab????

 

[Jim W in Tampa]

Jim

I am not sure that I understand you.

He is in the interior of the building if I read his post correctly.

Edit: He said "channel". So I think that he is inside the structure.

here is what i read
"I can run a 3/4" PVC just under the slab and sleeve it with UF."
yes if actually in the slab then we have something else and that might be stuctual issue

 

[cadpoint]

Why didn't anyone show that hool that's built for under pavement slab boring ?

 

[ivsenroute]

With the limited info - one would hope it is not a post tension slab????

That would create some serious issues.

 

[iwire]

With the limited info - one would hope it is not a post tension slab????

Its on the ground, why would it be post tension?

 

[infinity]

Are you just making a shallow groove in the concrete deep enough for the raceway? If so you'll only need to be deep enough to conceal the raceway. Table 300.5 would not apply.