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

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
2017 / 2014 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: 9066
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

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box

Recent Posts
Looking for older post
by sparkyinak
Today at 12:27 AM
License exam
by TRUE POWER
Yesterday at 11:33 PM
Members: Non-Members: Did you know?
by Admin
Yesterday at 02:34 PM
Safety at heights?
by HotLine1
01/21/17 08:51 PM
International Wire Colour Codes
by Texas_Ranger
01/21/17 03:29 PM

Who's Online
1 registered (sparkyinak), 108 Guests and 11 Spiders online.
Key: Admin, Global Mod, Mod
New in the Gallery:
Desk-mounted "power-board"
Top Posters
gfretwell 9066
Trumpy 8560
pauluk 7693
HotLine1 6833
sparky 5545
Member Spotlight
Member Since: 08/01/07
Posts: 62

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