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!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Parking lot pole light swap....
by gfretwell
10/24/16 08:46 PM
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 14
HotLine1 7
ghost307 7
renosteinke 6
Potseal 4
Who's Online
0 registered (), 119 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#97868 - 04/06/06 03:02 PM Water pipe bonding
tmegger64 Offline
Junior Member

Registered: 03/12/06
Posts: 7
Loc: Naples Fl.
While inspecting unit remodel in a multiple occupancy bldg I checked the bonding for the water piping system in the units panel. Traced the bond to the water heater of the unit. 250.104(A)(2) says in essence that if the system is isolated from all other occupancies by use of nonmetallic water piping then the above bonding is acceptable. The question arises: How do you know if there is nonmetallic isolation? You don't The building is old as the hills and who knows if the metal piping system has any isolated areas. So the real question is: If it is left bonded in the unit and there isn't any nonmeatlic isolation will it make a difference anyway? I hate to see the EC have to run a bond in an old building to the service.

2014 / 2011 NEC & Related Books and Study Guides
#97869 - 04/06/06 05:23 PM Re: Water pipe bonding
resqcapt19 Offline

Registered: 11/10/00
Posts: 2209
Loc: IL
Is this a bonding conductor required by 250.104 or a grounding electrode conductor for the service?

#97870 - 04/07/06 03:15 AM Re: Water pipe bonding
tmegger64 Offline
Junior Member

Registered: 03/12/06
Posts: 7
Loc: Naples Fl.
It's the bonding conductor per 250.104 for the water piping.

#97871 - 04/08/06 10:11 AM Re: Water pipe bonding
Larry Fine Offline

Registered: 02/18/05
Posts: 684
Loc: Richmond, VA
The older the building, the less likely there are isolated sections of pipe.
Larry Fine
Fine Electric Co.


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