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#89906 10/24/04 12:29 AM
Joined: Jan 2004
Posts: 1,507
G
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The 2002 NEC at 600.23(B)(2)(b) identifies the #8 insulated conductor as a "grounding conductor". Does this mean that if the Deck box is located between 4 and 5 feet from the water's edge that I must also bond this box? Just how would you do this?

[This message has been edited by George Little (edited 10-24-2004).]


George Little
2017 / 2014 NEC & Related Books and Study Guides
#89907 10/24/04 01:04 AM
Joined: Jul 2004
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G
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I got into this with the guys on the Florida IAEI site. Basically they have a problem saying we are bonding the pool to the service grounding electrode even though this path exists through at least 2 #12s. By calling the wire from the forming shell to the deck box a "grounding" wire they can turn a blind eye to the fact that they just made the pool part of the grounding electrode system. Since that forming shell is bonded to pool steel on the same metal strap as the "grounding" lug and the bonding screw to the light shell, with it's EGC, it
would be redundant to bring another #8 over to the deck box from there.


Greg Fretwell
#89908 10/24/04 11:25 AM
Joined: Jan 2004
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The pictures in the "Analysis of Changes" published as a partnership of NFPA and IAEI show the Deck box being connected to the bonding grid with a #8 conductor in addition to the #8 "grounding conductor" inside the conduit going to the niche. This is the essence of my question. There is only one terminal in most deck boxes that is capable of terminating a #8 wire. The other issue is if I am using three conduits in a deck box (feed in, feed out and feed to niche) there is no entry available for the "bonding wire".


George Little
#89909 10/24/04 11:55 AM
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I figured out that too (no place for 2 #8s)
I stubbed up a #8 solid where my J boxes are but ended up not using it. You have a #12 and a #8 going to the bonded niche anyway (for each light). I am not sure what a 3d wire would do.


Greg Fretwell
#89910 10/24/04 12:38 PM
Joined: Jan 2004
Posts: 1,507
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I have taken the stand that if the deck box is more than 5 feet from the water's edge it is not required to be bonded to the bonding grid. Based on 680.26(B) Please correct me if I'm wrong


George Little
#89911 10/24/04 12:46 PM
Joined: Aug 2003
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George: I agree. If the box is within 5', it must be bonded to the grid and have an EGC, if it is more than 5', only an EGC is required.


Ryan Jackson,
Salt Lake City
#89912 10/24/04 05:47 PM
Joined: Feb 2002
Posts: 2,233
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Greg,

I agree with you, the deck box already has a # 8 wire bonding the box to the pool grid, so another bonding wire should not be required.

#89913 10/24/04 06:03 PM
Joined: Jun 2003
Posts: 681
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Remember that 680.23(B)(2)(b) is in reference to using a nonmetallic raceway, and they are discussing using the 8 AWG as an equipment grounding conductor - very important.

As far as bonding the Deck Box, the bonding conductor (if the box is within 5 feet) is not required to be installed inside the raceway.


Pierre Belarge
#89914 10/25/04 12:03 AM
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Do you folks ever see any metal? Around here the light niche and the J box are going to be plastic and the only metal is the terminals. In the niche that 2" strip of metal is where the lamp bolt, bonding lug and <potted> grounding lug fasten. The raceway is PVC. The "deck" box is sticking up on the PVC next to the pump. If you are lucky they will stick an old board in the ground to strap it to.


Greg Fretwell
#89915 10/25/04 07:04 PM
Joined: Jan 2004
Posts: 1,507
G
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Fretwell- We still see metal niches in Michigan and metal deck boxes with either metal or plastic covers. Wish someone would come up with a good way to secure deck boxes that have PVC conduits run to them. The other thing we are starting to see around here is fiber optic ligthting and this doesn't typically have any metal parts that need bonding.


George Little

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