wet location article 100

[monkey_man_100]

Is pvc for a slab in a residence considered a wet location.

 

[celtic]

Location, Wet.
Installations under ground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather.

What do you think?

(Article 100)

 

[monkey_man_100]

I have heard of people using THHN for island slab. But according to 310.13 THHN is only for dry and damp locations. Isn't this wrong?

 

[infinity]

I have heard of people using THHN for island slab. But according to 310.13 THHN is only for dry and damp locations. Is this wrong?

It is wrong if the wire is only rated as THHN. I have never seen THHN that wasn't also rated as THWN, have you?

 

[monkey_man_100]

I am pretty new at this electrical thing and I only do new construction. All I see is NM wire.

 

[infinity]

I am pretty new at this electrical thing and I only do new construction. All I see is NM wire.

OK, welcome to the forum. Most wire that is listed as THHN is also listed as THWN. The W in THWN indicates that it is suitable for a wet location. You were correct in your assumption that straight THHN conductors cannot be used in a conduit that is encased in concrete since, by definition, that installation is considered a wet location. Hope this helps.

 

[monkey_man_100]

yep Thanks

 

[tallgirl]

Oy vey.

Oy vey.

I am pretty new at this electrical thing and I only do new construction. All I see is NM wire.

Dittos.

(Fortunately, I live in a barren desert wasteland and there are no wet locations.

Anywhere. )

 

[dingokangaroo]

(Fortunately, I live in a barren desert wasteland and there are no wet locations.

Anywhere. )

welcome to the outback mate