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Do I need to use a metal box for an outlet? Answered

I'm making a concrete art piece and want to insert an electrical outlet inside it.  Is it okay if I embed the outlet in the concrete or is there a reason I need to use the metal outlet box like is used in the wall?


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Toga_Dan
Toga_Dan

4 years ago

here's another idea. I'm not saying it's a good idea, necessarily. Cast a waterproof extension cord into the piece. Again, I ask: how much power are you drawing

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John Gray 1
John Gray 1

4 years ago

Metal is best for short protection.

There are receptacle boxes made for imbedding in concrete both plastic and steel.

Ether way use a GFCI receptacle.

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Toga_Dan
Toga_Dan

Reply 4 years ago

if she modifies a box to be narrower, a metal box could short out the energized screws on the side of the outlet.

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Toga_Dan
Toga_Dan

4 years ago

how much power are you pulling? The main caution may be accumulated heat.

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Toga_Dan
Toga_Dan

4 years ago

there are also plastic outlet boxes. If you must modify it, go with plastic. Metal can short out your outlet.

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Toga_Dan
Toga_Dan

4 years ago

what is the advantage of omitting the box?

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mazelady
mazelady

Reply 4 years ago

My art piece is narrower than the box so it would distort the shape.

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Kiteman
Kiteman

4 years ago

The metal boxes allow you conveniently remove the socket plate from the wall.

This makes it easier to connect the wires, and also makes it possible to renew wires without having to dig holes in the wall. For the same reason, you should have your wires in conduits (pipes, tubes) or other open spaces inside the wall, so that they can be renewed without having to destroy the wall.

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mazelady
mazelady

Reply 4 years ago

So if I'm creating a concrete art piece with an electrical outlet embedded in it, there is not a safety reason why I couldn't just make a much smaller, fitted metal box around my outlet to keep the concrete out when it's poured?

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Kiteman
Kiteman

Reply 4 years ago

You will have to leave the concrete to cure for several days at least, to make sure all the water in the mix has reacted before you put any current through the circuitry, in case of short-circuit between exposed contacts.