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Jimmyswo 11-16-2012 06:57 PM

Electrical outlet receptacle touching copper hydro pipe
Hi everyone
I just had an outlet installed in the joists of a unfinished basement to allow me to plug in a new washing machine. I just noticed that due to space constraints the electrician placed the metal box of the outlet right against the main water line which is made of copper.
I will admit to knowing little about electrical code but this doesn't seem right. If anyone is familiar with electrical code and could help me out it would be greatly appreciated.

Jimmyswo 11-16-2012 06:58 PM

Just to expand on the message above. The copper water main and metal outlet box are touching.

danpik 11-16-2012 07:10 PM

Not a problem. Should be a GFCI recepticle though.

joed 11-16-2012 07:21 PM

The two metals should not be touching. The copper pipe will eventually corrode either from vibration or from galvanic action of two dissimilar metals.

sublime2 11-16-2012 07:43 PM

Push a shim between the 2 metals.

AllanJ 11-16-2012 09:12 PM

Actually in a properly built electrical system, the metal outlet box and the water pipe are "touching" in a roundabout or indirect manner even if they are not in direct contact with each other; that is referred as being bonded.

Aside for corrosion due to galvanic action (requires being wet or in a humid atmosphere), their "touching" is perfectly okay.

The metal box is bonded to the breaker panel either by the ground wires (equipment grounding conductors) in the Romex cables going from box to box, or by the metal conduits going from box to box. The panel is bonded to the plumbing system by a fat ground wire coming out and attached to one of the water pipes. This fat ground wire is called a grounding electrode conductor when it is attached to a metal main water pipe exiting the building underground; otherwise it is called a bonding jumper. Where plastic pipe is used, isolated sections of metal pipe should have bonding jumpers going between them.

Jimmyswo 11-17-2012 08:59 AM

Thanks for everyone's reply. Does anyone know if this is compliant with the electrical code?

k_buz 11-17-2012 09:01 AM

Some inspectors will fail it due to the fact you are in contact with dissimilar metals. There is nothing to fear electrically, but the plumbing pipe will prematurely fail.

gregzoll 11-17-2012 10:27 AM

Just turn off the circuit and move the box.

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