Water and Gas Pipe Grounding
- Thread starter wmeek
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ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Water and Gas Pipe Grounding
If you are talking about a grounding electrode system take #8 to the water and #8 to a ground rod. You can not use the gas piping as a grounding electrode. Once you are done with that, bond the gas pipe with a EGC (edit: bonding jumper) sized off of 250.122 (#8? no NEC here). If you have fittings in your water pipe to bond around you can also use table 250.122
[ August 07, 2003, 04:06 PM: Message edited by: ryan_618 ]
If you are talking about a grounding electrode system take #8 to the water and #8 to a ground rod. You can not use the gas piping as a grounding electrode. Once you are done with that, bond the gas pipe with a EGC (edit: bonding jumper) sized off of 250.122 (#8? no NEC here). If you have fittings in your water pipe to bond around you can also use table 250.122
[ August 07, 2003, 04:06 PM: Message edited by: ryan_618 ]
Re: Water and Gas Pipe Grounding
This is for bonding of the water and gas pipes.
Code says to run #8 to water, and # 6 to gas. the inspectors says I can combine them and run one wire and loop them. That was what i was wandering on the size of the two would be
This is for bonding of the water and gas pipes.
Code says to run #8 to water, and # 6 to gas. the inspectors says I can combine them and run one wire and loop them. That was what i was wandering on the size of the two would be
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: Water and Gas Pipe Grounding
I really wish I had my code book here, but doesn't 250.104 state that you bond piping systems off of table 250.122??? Also, I thought it said you can use the EGC from the circuit likely to energize the gas piping. I can't think of what that could be other than a furnace that would be on a 20 amp circuit. Have your inspector justify his logic. But ask tactfuly
I really wish I had my code book here, but doesn't 250.104 state that you bond piping systems off of table 250.122??? Also, I thought it said you can use the EGC from the circuit likely to energize the gas piping. I can't think of what that could be other than a furnace that would be on a 20 amp circuit. Have your inspector justify his logic. But ask tactfuly
Re: Water and Gas Pipe Grounding
250.104(A) referres to table 250.66 for sizing of a bonding jumper to metal water piping. Assuming 1/0 aluminum service entrance conductors for that 125 amp service, #8 copper will suffice. 250.104 (B) referres to table 250.122 for sizing of the bonding jumper to the gas piping, based on "the rating of the circuit that may energize the piping system" )
[ August 07, 2003, 05:45 PM: Message edited by: eprice ]
250.104(A) referres to table 250.66 for sizing of a bonding jumper to metal water piping. Assuming 1/0 aluminum service entrance conductors for that 125 amp service, #8 copper will suffice. 250.104 (B) referres to table 250.122 for sizing of the bonding jumper to the gas piping, based on "the rating of the circuit that may energize the piping system"
)[ August 07, 2003, 05:45 PM: Message edited by: eprice ]
- Location
- Bremerton, Washington
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- Master Electrician
Re: Water and Gas Pipe Grounding
Keep in mind if you use 8AWG to bond a metal water pipe then it has to be run in conduit if exposed. 250.104 referrs to 250.64(B). Gas piping is considered bonded by the supply circuit, for example an equipment grounding conductor in the supply to a furnace is all that is required.
Also the bonding connection has to be accessible.
Keep in mind if you use 8AWG to bond a metal water pipe then it has to be run in conduit if exposed. 250.104 referrs to 250.64(B). Gas piping is considered bonded by the supply circuit, for example an equipment grounding conductor in the supply to a furnace is all that is required.
Also the bonding connection has to be accessible.
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