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#94249 - 07/21/05 04:36 PM PEX and copper bonding
Matt Barrett Offline
Member

Registered: 01/25/04
Posts: 29
Loc: Danbury, CT
OK I have a question for you guys…

We are currently roughing a house that uses all PEX tubing (plastic water piping.)

But, at every bathroom/sink/fixture, etc, they transition to copper in the walls.
So basically, we have several isolated copper water “systems” in the house supplied by this nonmetallic pipe.

How would you handle the bonding/grounding of this? I want to bond it all together, is that necessary?

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#94250 - 07/21/05 04:59 PM Re: PEX and copper bonding
Ron Offline
Member

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
Code requires you to bond the metallic piping if it is likely to be energized. I might argue that a stand alone sink is not likely to become energized.
_________________________
Ron

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#94251 - 07/21/05 07:23 PM Re: PEX and copper bonding
BobH Offline
Member

Registered: 10/16/04
Posts: 134
Loc: Newfane, N.Y USA
You could bond it to the circuit that it is likely to become energized by. If that makes sense. If it is likely to become energized at all.

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#94252 - 07/22/05 07:02 AM Re: PEX and copper bonding
JBD Offline
Member

Registered: 07/12/01
Posts: 599
Loc: WI, USA
This is not a pool area or hospital room. You do not have a metallic piping system, you have seperate pieces of metal.

If you are going to bond isolated sections of pipe simply because they are metal, don't forget to bond the towel and curtain rods. What about the couplings and connectors for the PE tubing?

If you are going to bond the piping because is near a counter top receptacle, then don't forget to bond the drawer pulls also.

Only if there is good probability that the metallic item will come in contact with an electrical conductor is bonding required. I can not think of a situation that would energize these pipe stubs.

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#94253 - 07/22/05 07:41 AM Re: PEX and copper bonding
Ron Offline
Member

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
I can think of a situation where the metallic pipe at the sink may be energized, point of use electric water heater, and if it were installed then I would verify that there was an EGC at the equipment to essentially bond the piping at the same time as the heater.
_________________________
Ron

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#94254 - 07/22/05 09:27 AM Re: PEX and copper bonding
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
I agree 100% with JBD

 Quote:
You do not have a metallic piping system, you have separate pieces of metal.


No bonding required.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

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#94255 - 07/22/05 02:31 PM Re: PEX and copper bonding
Matt Barrett Offline
Member

Registered: 01/25/04
Posts: 29
Loc: Danbury, CT
Thanks for the replies guys. I will leave it as it is.

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#94256 - 07/22/05 04:41 PM Re: PEX and copper bonding
Electricmanscott Offline
Member

Registered: 01/12/02
Posts: 1478
Loc: Holden, MA USA
Good to ask Matt but for some reason this question kills me everytime I hear it. Alot of people are quick to jump on the bond wagon without actually thinking for a couple minutes about the situation.

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#94257 - 07/22/05 05:23 PM Re: PEX and copper bonding
Matt Barrett Offline
Member

Registered: 01/25/04
Posts: 29
Loc: Danbury, CT
Well, each bathroom has about 20 or so feet of copper in the walls, for shower, sink, etc.

Master is all copper so about 50 feet, but grounded by the steam shower unit.

NM can touch the pipe in some places.

How about the boiler? Allot of copper in the basement but PEX to the AH. So all that is grounded by the 14/2 to the boiler?

It all just seems a little unsafe. All because of plastic pipe.

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#94258 - 07/22/05 05:52 PM Re: PEX and copper bonding
Dnkldorf Offline
Member

Registered: 12/12/04
Posts: 1091
Loc: nowhere usa
This thread ponders the question:

How is any water pipe likely to become energized?

What is the criteria for likely?


Dnk.....

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