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Old 12-12-2019, 07:11 AM   #1
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Airsealing inside electrical box


I did read the post below regarding sealing outside an electrical box.

My electrical box is built onto a piece of wood attached to the bare outside wall. Unfortunately, the wood does not cover the entire exposed wall inside the box.

The wires lay right against the wall. The floor joists are exposed above it.

What is the best way to insulate this box?
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Old 12-12-2019, 07:19 AM   #2
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Re: Airsealing inside electrical box


Can you post up a picture?
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Old 12-12-2019, 01:08 PM   #3
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Re: Airsealing inside electrical box


Here are the pics of the electrical box that needs to be insultated
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Airsealing inside electrical box-20191212_085046.jpg   Airsealing inside electrical box-20191212_085137.jpg  
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Old 12-12-2019, 01:25 PM   #4
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Re: Airsealing inside electrical box


I would frame it out to match the lower wall leaving the space open for a face frame and door and insulate the new walls and glue a 2" foam to the back of the door.
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Old 12-12-2019, 08:33 PM   #5
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Re: Airsealing inside electrical box


I must be missing something. Are we talking about the white duplex receptacle next to the breaker panel? If so, why does it need to be insulated?


Also, is that mould on the foundation wall (the 'black stuff')?


Edit: I decided I think you mean the breaker box itself, which appears to only partially mounted onto plywood. Unless you are really comfortable with matters electric, I'm not sure this is a DIY job as the panel may have to be pulled away from the wall. Also, I believe breaker panels now have to be mounted on a non-combustible barrier such as drywall, but I'm not sure if this is Ontario Code or, if it is, whether any modification would continue the grandfathering.
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Old 12-12-2019, 08:50 PM   #6
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Re: Airsealing inside electrical box


I'd pull it out and remount it as a surface mount. As is, that box may sweat in the winter and be a big problem. It would where I live! If you move it out, you will need to box around it to hide and protect the cables coming in, to please the inspector. I don't see how it got approved as is, doors or no doors.

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Old 12-12-2019, 09:05 PM   #7
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Re: Airsealing inside electrical box


Quote:
Originally Posted by lenaitch View Post
Also, I believe breaker panels now have to be mounted on a non-combustible barrier such as drywall, but I'm not sure if this is Ontario Code or, if it is, whether any modification would continue the grandfathering.

Just for your own info @lenaitch , that was in the OESC (Ont code)
at one point but is no longer. Wouldn't swear to it, but think it was
added to the 2002 code cycle then removed in the next cycle which
was 2006. What I'm quite certain of is that it was removed by 2006.

Haven't heard of any other jurisdiction with this requirement, but
couldn't say with certainty.
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