A receptacles in a concrete slab box is considered a wet location. True or false?

[Dennis Alwon]

In a round about way implied. It does reference a means to prevent accumulation of moisture can be field installed 314.15, (ie. drill a weep hole) implying interior may be at least a damp location. Same method suggested for conduit bodies.

How do you put a weep hole in an underground box? A handhole box doesn't have a bottom and of course, everything is wet but if the inside of a jb is wet then what kind of device is allowed in it?

 

[Dennis Alwon]

Not sure what the op has done. It would be helpful to know

 

[infinity]

Not sure what the op has done. It would be helpful to know

Almost sounds like a test question. There are some things that are implied but there is no definitive code wording stating that the inside of a box is ever a wet location.

 

[jap]

I've never seen a panel installed in a concrete floor facing up

How do you put a weep hole in an underground box? A handhole box doesn't have a bottom and of course, everything is wet but if the inside of a jb is wet then what kind of device is allowed in it?

I would say no devices would be allowed in a box that is considered a wet location unless the devices are hermetically sealed , and, some on grade floorboxes do get filled with water and destroy everything inside of them if the conduits are not installed to drain.

The conductors inside an underground conduit of any length are inevitably going to be touching water somewhere in the run whether that be water intrusion from the outside of the conduit or condensation.

Whether there's a rule that specifically mentions it or not, I'm with Larry's thought process, if the inside of a conduit is considered a wet locaton, and, that conduit is connected to a box that is not sealed, the box will get wet inside also.

JAP>

 

[Dennis Alwon]

Whether there's a rule that specifically mentions it or not, I'm with Larry's thought process, if the inside of a conduit is considered a wet locaton, and, that conduit is connected to a box that is not sealed, the box will get wet inside also.

JAP>

Not if the conduit is laid to drain away from the box. If the inside of a box is wet location then no devices would be allowed. Now we all have seen water in boxes above grade so the issue is really one of what the code states. Obviously we are allowed to install receptacles in a box that is in a wet location.

 

[jap]

Not if the conduit is laid to drain away from the box. If the inside of a box is wet location then no devices would be allowed. Now we all have seen water in boxes above grade so the issue is really one of what the code states. Obviously we are allowed to install receptacles in a box that is in a wet location.

You're only allowed to do that because common sense prevails, and, they have not logical answer for this scenario "not" to allow it.

JAP>

 

[jap]

To say the inside of an underground conduit is a wet location yet somehow magically the box attached to that conduit will not allow that liquid inside of it is simply wishful thinking.

JAP>