The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 03:17 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 8
Trumpy 6
Who's Online
0 registered (), 202 Guests and 6 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#187649 - 07/05/09 04:26 PM 2011: Pool Grounding Grid
renosteinke Offline
Cat Servant
Member

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
I see there are numerous proposals to change the requirements for the equipotential grid around pools. I daresay that few sections of the NEC have undergone a more furious amount of revision than 680.26 has in the last few cycles.

Some of the proposals seek to remove the requirement; others try to make it more specific. There is one proposal (17-172) which, while it addresses the shell rather than the deck surfaces, causes me some concern; IMO, it's one of those things that will take on a life of it's own, and greatly increase pool costs.

Also, IMO, none of these proposals address inaccessible surfaces.

My own research into this topic points to this entire issue arising solely from the advent of ONE type of pool - the shipped complete by truck, blow molded plastic pool shell. Another possible contender is the plastic encapsulated metal pool shell. In either instance, the real culprit seems to be the inadvertant insualting of the pool water from the surrounding grade. It appears to me that this is an issue better addressed by identifying those particular methods, rather than trying for a 'one size fits all' approach.

Top
2014 / 2011 NEC & Related Books and Study Guides
#187651 - 07/05/09 11:26 PM Re: 2011: Pool Grounding Grid [Re: renosteinke]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
There is already a provision to bond the water in the 2005/2008.

Quote:
680.26(C) Pool Water. An intentional bond of a minimum conductive surface area of 5806 mm2 (9 in.2) shall be installed in contact with the pool water. This bond shall be permitted to consist of parts that are required to be bonded in 680.26(B).
_________________________
Greg Fretwell

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals