pvc and copper water service
- Thread starter jes25
- Start date
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charlie
Senior Member
- Location
- Indianapolis
Re: pvc and copper water service
Yes.
Yes.
bphgravity
Senior Member
- Location
- Florida
Re: pvc and copper water service
No. If the water heater is connected by PVC piping only, the EGC installed with the circuit conductors will serve to bond the tank and valves.
No. If the water heater is connected by PVC piping only, the EGC installed with the circuit conductors will serve to bond the tank and valves.
busman
Senior Member
- Location
- Northern Virginia
- Occupation
- Master Electrician / Electrical Engineer
Re: pvc and copper water service
What if it is a gas-fired water heater? I think the question then is: is the metal piping likely to become energized? I would say it depends on the circumstances.
What if it is a gas-fired water heater? I think the question then is: is the metal piping likely to become energized? I would say it depends on the circumstances.
Re: pvc and copper water service
Joe,
250.104(A) is the section that covers bonding of water piping systems. It says nothing about "likely to become energized" (unlike section 250.104(B) for gas piping). 250.104(A) tells how to bond the water piping and does not mention the use of circuit equipment grounding conductors (unlike section 250.104(B) for gas piping). After reading your first post, my only question was whether isolated metal valves would constitute a "piping system" I think not. But, your last post leades me to believe that there may be a copper piping system downstream from the water heater? If so, 250.104(A) requires it to be bonded.
Joe,
250.104(A) is the section that covers bonding of water piping systems. It says nothing about "likely to become energized" (unlike section 250.104(B) for gas piping). 250.104(A) tells how to bond the water piping and does not mention the use of circuit equipment grounding conductors (unlike section 250.104(B) for gas piping). After reading your first post, my only question was whether isolated metal valves would constitute a "piping system" I think not. But, your last post leades me to believe that there may be a copper piping system downstream from the water heater? If so, 250.104(A) requires it to be bonded.
hurk27
Senior Member
- Location
- Portage, Indiana NEC: 2008
Re: pvc and copper water service
I would say that most modern dwellings will have more than one sweated in mixing valve that has a brass body which would be more that enough to bond the hot and cold water pipes. and the isolated piping at the water heater would be just that an isolated pipe that should not require bonding. What if a house had all PVC plumbing, but had short pieces of copper pipe to the faucets at each sink or tub. should we be required to run a bonding conductor throughout this house to make a bond at each one? I would think not.
I agree that if this house didn't have the mixing valves that would bond the hot and cold pipes then a bond should be required to connect these pipes.
But I think this is one of those gray areas that could be cleaned up a little in the "2008" by providing what is meant when the code say's "other metal piping" as in a dwelling the only "other metal piping" I know of is gas which is already mention in 250.104(B)
I would say that most modern dwellings will have more than one sweated in mixing valve that has a brass body which would be more that enough to bond the hot and cold water pipes. and the isolated piping at the water heater would be just that an isolated pipe that should not require bonding. What if a house had all PVC plumbing, but had short pieces of copper pipe to the faucets at each sink or tub. should we be required to run a bonding conductor throughout this house to make a bond at each one? I would think not.
I agree that if this house didn't have the mixing valves that would bond the hot and cold pipes then a bond should be required to connect these pipes.
But I think this is one of those gray areas that could be cleaned up a little in the "2008" by providing what is meant when the code say's "other metal piping" as in a dwelling the only "other metal piping" I know of is gas which is already mention in 250.104(B)
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