ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
New fan motor for Panasonic
by gfretwell. 06/21/19 10:56 AM
Burning out of return(white) side of 120volt rec
by crselectric. 06/14/19 02:15 AM
Video door bell causing chime activation of coil
by JoeTestingEngr. 06/13/19 12:43 PM
Troubleshooting Voltage Drop Across Relay
by gfretwell. 06/09/19 11:49 AM
Apple Recalls Three-Prong Wall Plug Adapters
by Admin. 06/05/19 09:06 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 10 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Gas Bonding. #46916
01/05/05 07:08 PM
01/05/05 07:08 PM
S
Sandro  Offline OP
Member
Joined: Dec 2001
Posts: 444
Stoney Creek, ON, Canada
I posed this question in CDN forum, no response, so, may I have US elec. thoughts on the matter?

question posed on cdn forum as follows....


Increasingly, in residential work, IPEX water piping is being used. This is the flexible piping with the polyethelyne layers used in resi as an alternative to copper piping.
My question is, we normally bond the gas pipe to the cold water pipe at the Hot Water Tank. However with the IPEX piping running throughout the entire house, is this still acceptable method of bonding? In the eyes of the CEC, does the Ipex provide a continuous bond from the water main?

I have been hounding the guys to be sure that they bond the gas pipe at the panel ground when a house has Ipex, however when I observe other contractors jobs, I notice they still bond the gas at the HWT.

Work Gear for Electricians and the Trades
Re: Gas Bonding. #46917
01/07/05 03:23 AM
01/07/05 03:23 AM
B
bucketman  Offline
Member
Joined: Oct 2004
Posts: 72
vancouver WA, USA.
could you bond @ the furnace Per 250.104 (B)

Re: Gas Bonding. #46918
01/07/05 07:58 AM
01/07/05 07:58 AM
W
winnie  Offline
Member
Joined: Sep 2003
Posts: 649
boston, ma
In the US at least, metal water piping is required to be bonded using a jumper that is sized relative to the service, even when the underground portion of the pipe is _not_ suitable as a grounding electrode.

_Other_ piping systems are required to be bonded based upon the size of the circuit which might energize the piping. The furnace circuit, for example, or the gas range circuit, with bonding done from the egc of those circuits to the pipe.

Most of the gas hot water heaters that I am aware of don't require electricity at all; though I have seen modern heaters with forced draft systems that require electricity for the blower. If there is no circuit to the heater, and the water pipes to and from the heater are plastic, then bonding the heater to the steel gas piping probably does nothing to help ground the gas pipe...though if the pipe is grounded, then it might help ground the water heater [Linked Image]

-Jon

Re: Gas Bonding. #46919
01/07/05 03:56 PM
01/07/05 03:56 PM
J
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
I don't think we're concerned here with a short in the water heater, or the toilet, etc. Rather, I think we are tryiny to protect from these systems being energised by something else- say, a frayed house wire, or apliance that falles into a sink- by providing a good ground path, so the breaker will trip.
With that in mind, if your pipe is plastic, you need not bond it at all. Any metal pipe needs to be bonded.
The gas line you mention raises an interesting question- what do you do if the gas line is a plastic-coated metal line?
I believe that, in this situation, the bonding provided when the water heater has its' igniter wired up is enough. If, instead, there is a pilot light, I don't really see a need to bond it at all.

Re: Gas Bonding. #46920
01/09/05 07:16 PM
01/09/05 07:16 PM
C
condenseddave  Offline
Member
Joined: Mar 2002
Posts: 25
East Stroudsburg, PA USA
Quote
Originally posted by John Steinke

The gas line you mention raises an interesting question- what do you do if the gas line is a plastic-coated metal line?


I presume you're referring to "CSST" (Corrugated Stainless Steel Tubing) products, such as Gastite, Omegaflex, Wardflex, etc. If so, the outer jacket can be stripped off with a razor knife, near a fitting, and a ground clamp can be applied, as long as it's not torqued down to the point where it crushes the corrugations. This will NOT effect the operation/integrity of the pipe, but will offer you a place to bond.

When I install this type of pipe, hoever, I usually enter the house with steel pipe, into a manifold, then branch out with CSST. I do know others, however, that run this stuff in from the meter. It's ugly, but permitted. [Linked Image]


It's all about integrity.

Featured:

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

 

Member Spotlight
Radar
Radar
Los Angeles, CA
Posts: 349
Joined: April 2004
Show All Member Profiles 
Top Posters(30 Days)
Khombo 2
Popular Topics(Views)
255,843 Are you busy
191,821 Re: Forum
181,591 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.028s Queries: 14 (0.006s) Memory: 0.9697 MB (Peak: 1.1070 MB) Zlib enabled. Server Time: 2019-06-24 19:37:21 UTC