Pool Light conduit

17377 Views 7 Replies 2 Participants Last post by Speedy Petey, Apr 11, 2008

rebel34

Discussion Starter · Apr 10, 2008

Wiring up a pool and the pool guy has a light that has a cord already connected to it that goes in conduit back to a junction box, he said the light is made so that water will be able to enter the conduit and as long as we end up higher than the water level it should be ok. Is anyone familiar with this type of lighting niche , I thought that you needed to keep water out of the conduit. Also 2 of the motors for the pool are in a mechanical store room and the water heat pump is outside near the pool, is it enough to bond the heat pump lug to the rebar grid and not the other motors that are inside (50 ' away from pool?

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Speedy Petey

· #2 · Apr 10, 2008

The wet niche conduit IS supposed to fill up with water.
Where is this "junction box" you mentioned? I hope it is a "deck box". You know, the one with the brass base with the threaded conduit entries and the black cover.

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rebel34

Discussion Starter · #3 · Apr 10, 2008

pool conduit

The installer told me now he wants the light run to a switch near the entrance to the pool to turn it on and off, is this okay ? No junction box, just the cord from light into light switch box.

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Speedy Petey

· #4 · Apr 10, 2008

Absolutely NOT! You need a deck box in between.

See NEC 680.23(B)(2) and especially ALL of 680.24
680.24 describes a deck box.

Here is an image:

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rebel34

Discussion Starter · #5 · Apr 10, 2008

deck box

Speedy Petey said:
Absolutely NOT! You need a deck box in between.

See NEC 680.23(B)(2) and especially ALL of 680.24
680.24 describes a deck box.

Here is an image:

I did read you had to have the deck box, it says in nec that it must be supported by 2 metallic conduits, since the conduit coming from inside at the panel and from the pool light is non-metalic can you add metallic conduit on the end that comes up out of the ground, or is there another way this is done? Thanks for the help.

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Speedy Petey

· #6 · Apr 11, 2008

You only need one support conduit. There are three entries in the bottom so you are set.
I really wish they would make a deck box capable of being supported on the side, or better yet, one that is self supporting, like those Arlington Garden Posts. That would solve a LOT of problems.

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rebel34

Discussion Starter · #7 · Apr 11, 2008

Speedy Petey said:
You only need one support conduit. There are three entries in the bottom so you are set.
I really wish they would make a deck box capable of being supported on the side, or better yet, one that is self supporting, like those Arlington Garden Posts. That would solve a LOT of problems.

Does it need to be metallic or can it be pvc. Also, I understand you can't run romex out to the deck box, is this correct and if so can you use uf or underground 12-2 or must they be single wire with a green insulated ground.

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Speedy Petey

· #8 · Apr 11, 2008

The support needs to be metallic.

You CANNOT run NM cable for ANY portion of the wiring to the pool light. Pretty much ALL grounds related to pool equipment are required to be insulated.
See 680.32(F). You need conduit ALL the way back to the panel. You need THHN/THWN conductors in conduit.
One exception is that you can use MC cable inside the structure.
The ground is supposed to be installed without splice, but there are certain exceptions and I have never had an issue with splicing to MC cable.

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