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Old 10-24-2011, 04:52 PM   #1
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How far should electrical boxes be from plumbing?


I am remodeling my shower. When I removed the tile, backerboard and greenboard, I discovered the electrical box is touching the plumbing. I am fairly certain that this is NOT a good idea.

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Old 10-24-2011, 05:41 PM   #2
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How far should electrical boxes be from plumbing?


Although it is not a huge issue, they should not really be touching. Almost touching is fine.

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Old 10-24-2011, 07:48 PM   #3
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no reason they couldn't be touching. IF its a metal box, it should be grounded. If its a metal water pipe, it should be grounded. If either are plastic, even less reason to worry about it
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Old 10-24-2011, 08:24 PM   #4
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As long as the water pipe doesn't go through your box you are good
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Old 10-26-2011, 01:00 AM   #5
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How far should electrical boxes be from plumbing?


Having two different metals touching will usually lead to galvanic reactions which will weaken one or both metals.

See en.wikipedia.org/wiki/Galvanic_corrosion

And since there will always be some stray voltage you'll get a slow but steady reaction over time.

Put something between them.
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Old 10-26-2011, 01:12 AM   #6
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How far should electrical boxes be from plumbing?


If it was me, and how I did it, let me put it this way. From four feet from the corner at the right side of the vanity, is the outlet. That places the outlet aprox. four feet from the shower head, which is left of the vanity.
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Old 10-26-2011, 01:12 AM   #7
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Originally Posted by raleighthings View Post
Having two different metals touching will usually lead to galvanic reactions which will weaken one or both metals.

See en.wikipedia.org/wiki/Galvanic_corrosion

And since there will always be some stray voltage you'll get a slow but steady reaction over time.

Put something between them.
What in the world are you talking about?
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Old 10-26-2011, 01:14 AM   #8
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Any time you have two DIFFERENT metals touching you will likely get a galvanic reaction. Basically one or both will corrode. It's chemistry.

If you have a steel electrical box touching a copper pipe you'll get corrosion over time. Maybe a long time but it will happen.
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Old 10-26-2011, 01:41 AM   #9
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How far should electrical boxes be from plumbing?


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Any time you have two DIFFERENT metals touching you will likely get a galvanic reaction. Basically one or both will corrode. It's chemistry.
Older electric water heaters are bad about this when plumbed into copper pipes. Today's heaters have dielectric nipples installed from the factory to prevent this reaction.
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Old 10-27-2011, 08:21 PM   #10
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What in the world are you talking about?
He's right. Just wrap some duct tape around the copper line where it makes contact with the galvanized box, problem solved.
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Old 10-28-2011, 08:45 AM   #11
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He's right. Just wrap some duct tape around the copper line where it makes contact with the galvanized box, problem solved.
Say what? And where did you come up with that, Bubba's book on home repair?
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Old 10-28-2011, 08:46 AM   #12
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How far should electrical boxes be from plumbing?


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Originally Posted by raleighthings View Post
Any time you have two DIFFERENT metals touching you will likely get a galvanic reaction. Basically one or both will corrode. It's chemistry.

If you have a steel electrical box touching a copper pipe you'll get corrosion over time. Maybe a long time but it will happen.
I know what galvanic reaction is. If the electric box is touching a copper water line, you know then and there, that Bubba was doing the work.
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Old 10-28-2011, 04:34 PM   #13
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Say what? And where did you come up with that, Bubba's book on home repair?

No, The jumbo duct tape book You just have to make sure it's UL listed.
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Old 10-28-2011, 05:30 PM   #14
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No, The jumbo duct tape book You just have to make sure it's UL listed.

My 2 best friends...duct seal and duct tape
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Old 10-28-2011, 08:53 PM   #15
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My 2 best friends...duct seal and duct tape
And tie wire?

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