Originally Posted By: pabernathy
This post was automatically imported from our archived forum.
The main problem in understand this is also based on the example of how you posted the qestion....he term grounding of the gas line when it really should be BONDING......two different things.....it is very important to know the difference in them..
In 1999 the NEC refered to the bonding of gas piping in Art 250-104(b) and it read as followed:
250-104(b) - Metal Gas Piping. Each aboveground portion of a gas piping system upstream from the equipment shutoff valve shall be electrically continuous and bonded to the grounding electrode system. The key here was upstream....remember that.
Ok...the confusion came because many would refer to the (c) version of this refering to metal piping and so in 2002 NEC it was revised.
Now...their is a difference between using the gas line as a " grounding electrode" versus bonding the system if it can possibly become live . Please understand the ruling in that you can NOT use any underground metal gas piping for the grounding electrode..... as listed in 2002 NEC 250-52(a)
Ok.....nice to see the NEC cleaned up the grounding electrode issue with the 250.53 ( 2002 NEC ) so it make sit clear what is involved in the grounding electrode system installation...new code section in 2002.
OK...on to the Gas piping....view NEC 2002 Art 250.104(b)...this refers to the bonding of piping systems and if they are installed in which they have a likely chance to become energized that shall be bonded as listed in the article.
The intent of the revision is make it clear that an equipment grounding conductor can bond all metal piping, including gas piping. So the additional bonding jumper is not required for gas or other metal piping.
So....summary....NO as a GE, and the ECG can be used to bond the gas piping system.
Would like to add even more but you guys dont want to read a novel..lol
Paul W. Abernathy- NACHI Certified
Electrical Service Specialists
Licensed Master Electrician
President of NACHI Central Virginia Chapter
Moderator @ Doityourself.com
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