Reciprocal Electrical Council Inc. - Wet-niche underwater luminaire flexible cord

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Wet-niche underwater luminaire flexible cord

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03 May 2011 1:40 PM

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Message # 583352

Deleted user

Is it 2008 NEC code-compliant to run a wet-niche luminaire 30 foot flexible cord from forming shell continuous, without splice, underground in IMC stubbing up into a nearby garage into a metallic junction box or pulling elbow, which is connected to panelboard in IMC?

Must this junction box be listed as a swimming pool junction box (Sec. 680.24 (A)?

Originally, the junction deck box was flush and within 18 inches of the inside walls of the pool (installed in 1965). The perimeter concrete deck was removed to expose a broken gas line supplying the pool water heater. In the process, the deck box with brass piping from the underwater luminarie and with home-run metal piping were exposed.

It is intended to cut the brass pipe below ground and connect IMC to it and run it back to the garage pull box then to the panel.

What kind of connector or method is used to connect brass pipe to IMC pipe?

Thanks

20 Aug 2011 4:18 PM

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Reply # 681000 on 583352

George Little

Robert France wrote:

class="webkit-indent-blockquote postcontent restore"Is it 2008 NEC code-compliant to run a wet-niche luminaire 30 foot flexible cord from forming shell continuous, without splice, underground in IMC stubbing up into a nearby garage into a metallic junction box or pulling elbow, which is connected to panelboard in IMC?

Must this junction box be listed as a swimming pool junction box (Sec. 680.24 (A)?

Originally, the junction deck box was flush and within 18 inches of the inside walls of the pool (installed in 1965). The perimeter concrete deck was removed to expose a broken gas line supplying the pool water heater. In the process, the deck box with brass piping from the underwater luminarie and with home-run metal piping were exposed.

It is intended to cut the brass pipe below ground and connect IMC to it and run it back to the garage pull box then to the panel.

What kind of connector or method is used to connect brass pipe to IMC pipe?

Thanks

Bob, since this is an existing wet niche fixture I would suggest that if the contractor has to extend the conduit for the niche to the new location in RNMC because IMC is not an acceptable wiring method for this type of installation because of the chlorine environment. I would allow the installer to connect to the K-Copper tubing using a threaded adaptor and use a water pipe type clamp suitable for direct burial and run a #8 solid copper conductor parallel to the conduit back to the deck box. If that makes you nervous, then he will need to install a new niche housing so you can bond inside the conduit. These retrofit repairs are always tough. I would also see if you can re-connect somehow to any existing rebar of the pool. And yes, it must be a Listed deck box as you indicated.