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Can I mount an electrical box on a non-stationary surface?

Home Improvement Asked on January 7, 2021

I am setting up a small rack panel and I’m mounting it to 1" ply on a piano hinge to make it easier to get behind.

I’d like to attach the electrical box on the same board. This means that the electric box could move but it won’t be very often.

I was thinking I would use a stranded whip to connect the one on the board to a stationary box nearby.

Can I mount an electrical box to something that moves? In CA, USA.

2 Answers

Absolutely, we use flexible conduit all the time. If flex conduit is installed for flexibility it is limited to 6’ in length. I would suggest stranded conductors for longer life but code is not specific on that. metal flex is handy and industrial plants do just what you want to do routinely it is code compliant so FMT or flexible metal tubing (usually just called metal flex).

Correct answer by Ed Beal on January 7, 2021

There are a lot of things you "can" do that are pretty safe, but not strictly code-compliant. If you wanted to be as correct as possible, but maybe not 100% code compliant, you could install a fixed outlet box at a convenient location and then use a outlet/plug combination to get you to your movable outlet. You'd want to use type S or SJ or SO cable which is suited for movement. Now I'm not saying this is code compliant, but should be a safe approach. If anybody wants to snip me for suggesting a not strictly code compliant solution, go ahead and I'll learn something!

Answered by George Anderson on January 7, 2021

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