Grounding gas pipe

[cwalden]

In a residential dwelling do you have to bond the gas pipe with the size of the non-current caring conductor that it would be likely to be energized with per 2011 NEC or do you have to bond it with # 6 bare according to NFPA 70E 2012?

They both can't apply at the same time.



Clayton

 

[Dennis Alwon]

Are we talking Csst piping or black iron. The black iron can be bonding via the equipment grounding conductor of the circuit that connects to the pipe. 250.104(B) The csst must be bonded with a #6 at the point where it enters the building.

 

[cwalden]

It is black metal gas entering the house and then there is some csst pipe ran off that. The only part that could become energized is the black pipe and that is by a 120 volt plug. What size bonding do I need at the gas meter 12 or 6?

 

[Dennis Alwon]

It is black metal gas entering the house and then there is some csst pipe ran off that. The only part that could become energized is the black pipe and that is by a 120 volt plug. What size bonding do I need at the gas meter 12 or 6?

If there is csst in the line then you need to bond the black iron with a #6 minimum at the load side of the meter. Some brands of Csst used to state that you must use T.250.66 to bond the pipe. So for a 200 amp service it would be #4 but most areas just require #6