Multiple Pool Light Cords

[Mystic Pools]

Typically we have individual conduit, usually 1" PVC, for each of our pool lights, 12v LED, that terminate at a deck box (Intermatic plastic) with cord strain relief.

Is there any NEC code regarding using a large conduit to accommodate multiple light cords? 12V or 110V? Say to a large trough or waterproof box?
I'm pretty cord strain relief is required for each cord.

 

[Dennis Alwon]

I don't believe you can do that-- here is why

680.24 Junction Boxes and Electrical Enclosures for
Transformers or Ground-Fault Circuit Interrupters.
(A) Junction Boxes. A junction box connected to a conduit
that extends directly to a forming shell or mounting
bracket of a no-niche luminaire shall meet the requirements
of this section.
(1) Construction. The junction box shall be listed as a
swimming pool junction box and shall comply with the
following conditions:
(1) Be equipped with threaded entries or hubs or a nonmetallic
hub
(2) Be comprised of copper, brass, suitable plastic, or other
approved corrosion-resistant material
(3) Be provided with electrical continuity between every connected
metal conduit and the grounding terminals by
means of copper, brass, or other approved corrosionresistant
metal that is integral with the box

 

[mpoulton]

Combining multiple cords in one conduit would seem to require T's in the conduit between the deck box and the fixture niches. If these are flooded conduits, that would pose a lot of potential underground leaks. Also not sure what listed conduit fittings could be used for that.

 

[Fulthrotl]

Typically we have individual conduit, usually 1" PVC, for each of our pool lights, 12v LED, that terminate at a deck box (Intermatic plastic) with cord strain relief.

Is there any NEC code regarding using a large conduit to accommodate multiple light cords? 12V or 110V? Say to a large trough or waterproof box?
I'm pretty cord strain relief is required for each cord.

more than three current carrying conductors in a conduit
gets various levels of derating.

if the box were 18" above the water level, that would work, iirc.

usually a light has a molded cord, and that reaches all the way
back to the panel, or in the olden days, to the junction box near
the wet niche fixture, and then building wire from there.

 

[Mystic Pools]

Thanks all
Figured an approved junction required-noted in NEC 680.24