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Underwater Pool Light Grounding #90887 12/17/04 09:13 AM
Joined: Feb 2004
Posts: 494
M
mustangelectric Offline OP
Member
Hi,
I was looking at the NEC for grounding of underwater pool lights and it says that I need an EGC no smaller than #12, is this correct?

Is this fronm the lights to the switch or to the panel?

Thanks for any replies.

-regards

Greg

2017 / 2014 NEC & Related Books and Study Guides
Re: Underwater Pool Light Grounding #90888 12/17/04 01:38 PM
Joined: Jun 2004
Posts: 613
S
shortcircuit Offline
Member
The #12 insulated grd should be run from the panel to the pool light juction box or listed transformer...and installed in pipe.

A #8 grd wire from the juction box to the forming shell...

OK?

shortcircuit

Re: Underwater Pool Light Grounding #90889 12/19/04 12:17 PM
Joined: Apr 2002
Posts: 46
Z
ZR600 Offline
Member
Must be a solid #8 to the shell.

Re: Underwater Pool Light Grounding #90890 12/19/04 12:22 PM
Joined: Jun 2003
Posts: 681
P
PCBelarge Offline
Member
Bonding the forming shell and grounding the pool light are two different issues, both items are addressed in Art 680.

Pierre


Pierre Belarge
Re: Underwater Pool Light Grounding #90891 12/19/04 11:43 PM
Joined: Feb 2004
Posts: 494
M
mustangelectric Offline OP
Member
Hi,
The feed is #14 the EGC is #14...The code says #12 for the EGC not the ungrounded or grounded condcutor..

The pool guy is doing this work..

just making sure...

-regards

Greg

Re: Underwater Pool Light Grounding #90892 12/20/04 04:38 PM
Joined: Jul 2004
Posts: 9,531
G
gfretwell Offline
Member
You need an unspliced #12 from the j box back to the panel
680.23(F)(2)Through-wall lighting assemblies, wet-niche, dry-niche, or no-niche luminaires (lighting fixtures) shall be connected to an insulated copper equipment grounding conductor installed with the circuit conductors. The equipment grounding conductor shall be installed without joint or splice except as permitted in (a)<anpther listed light j box> and (b)<grounding terminals in a switch box that controls the light>. The equipment grounding conductor shall be sized in accordance with Table 250.122 but shall not be smaller than 12 AWG.

He can't splice in a receptacle box or any other box that isn't for switching the light!

As for the ground to the forming shell <in addition to the EGC in the cord> it is either a brass conduit or plastic. If plastic 680.23(B)(2)(b)Nonmetallic Conduit. Where a nonmetallic conduit is used, an 8 AWG insulated solid or stranded copper equipment grounding conductor shall be installed in this conduit unless a listed low-voltage lighting system not requiring grounding is used. The equipment grounding conductor shall be terminated in the forming shell, junction box or transformer enclosure, or ground-fault circuit-interrupter enclosure. The termination of the 8 AWG equipment grounding conductor in the forming shell shall be covered with, or encapsulated in, a listed potting compound to protect the connection from the possible deteriorating effect of pool water.

Note that can be stranded, the ONLY place I know of that specifically allows stranded #8, although some people attempt to make the argument #8 stranded is "larger" than #8 solid thus OK.
I point to 680.26(C) which is pretty unambiguous "(C) Common Bonding Grid. The parts specified in 680.26(B) shall be connected to a common bonding grid with a solid copper conductor, insulated, covered, or bare, not smaller than 8 AWG."


Greg Fretwell

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