ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 3
Recent Posts
FPE in Germany
by Texas_Ranger. 11/19/17 07:30 AM
Ceiling fan distance from outdoor hot tub
by gfretwell. 11/16/17 02:18 AM
diazed fuses
by Texas_Ranger. 11/13/17 03:02 PM
Theft deterrent alarm
by gfretwell. 11/12/17 01:39 PM
EEPROM errors on XC7Z010-2CLG225I chip
by twh. 11/07/17 05:45 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
242,610 Are you busy
178,797 Re: Forum
170,043 Need opinion
Who's Online Now
2 registered members (crselectric, tomn), 46 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#187649 - 07/05/09 06:26 PM 2011: Pool Grounding Grid  
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
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.


2017 / 2014 NEC & Related Books and Study Guides

#187651 - 07/06/09 01:26 AM Re: 2011: Pool Grounding Grid [Re: renosteinke]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,135
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


Member Spotlight
BEAMEUP
BEAMEUP
WA
Posts: 27
Joined: December 2004
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 15 (0.002s) Memory: 0.7448 MB (Peak: 0.8609 MB) Zlib enabled. Server Time: 2017-11-21 22:57:27 UTC