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Article 680 Bonding (again) #101441
03/18/07 12:24 AM
03/18/07 12:24 AM
George Little  Offline OP
Joined: Jan 2004
Posts: 1,489
Michigan USA
I was reading in the '05 NEC and it talks about bonding connections in 680.26
(C) Equipotential Bonding Grid. The parts specified in
680.26(B) shall be connected to an equipotential bonding
grid with a solid copper conductor, insulated, covered, or
bare, not smaller than 8 AWG or rigid metal conduit of
brass or other identified corrosion-resistant metal conduit.
Can someone tell me what "rigid metal conduit of
brass or other identified corrosion-resistant metal conduit." is all about?

edited for typos

George Little
2017 / 2014 NEC & Related Books and Study Guides
Re: Article 680 Bonding (again) #101442
03/18/07 12:56 AM
03/18/07 12:56 AM
gfretwell  Offline

Joined: Jul 2004
Posts: 9,186
Sometime back when "Batman" was just a comic book character they used red brass conduit for the raceway to underwater lights. That conduit could also be used to tie other elements of the equipotential grid together. I suppose if someone actually used brass conduit for a pool light they could tie the deck grid to the deck box raceway.

There is an interesting interpretation of the deck grid floating around in Florida that says the deck grid must be continuous into the pool shell grid ie:bonded every 12". This came from Don Jhonson CMP17 at a Miami road show.
This was the example Fl IAEI had
Large image

Florida is still struggling with whether they will take 6 over #6 mesh as the grid for the concrete deck.

They are also wondering what you do about "packaged" spas. Is that permanent and needing a bonded deck? The workaround everyone seems to like is an elevated wood/composite deck around the spa. It still is troubling to most if they just drop one on the lanai/patio.

Greg Fretwell
Re: Article 680 Bonding (again) #101443
03/19/07 12:49 AM
03/19/07 12:49 AM
ShockMe77  Offline
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Brass is less susecptable to corrosive damage to the raceway.


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