warmth from attic thru electrical box

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Old 05-26-18, 01:58 PM
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warmth from attic thru electrical box

I removed a light fixture and remade some connections in a junction box in the ceiling.... when I was done, I put a metal octagon box cover on it. Few hours later I noticed that the cover is warm to the touch. I almost opened the box up to check my connections but then I realized my attic is at least 110 degrees.

Is it fair to say I would feel warmth on a metal box because of attic heat?
 
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Old 05-26-18, 02:00 PM
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Yes. Metal is a very good conductor of heat. You could put a plastic cover on it.
 
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Old 05-26-18, 05:56 PM
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Please go back and add a location to your profile.
Ideally the attic should be close to the outside temp. of the outside.
If the attics that hot of course the metal will be hot.
Lack of enough soffit venting, ridge venting will cause overheating in the attic.
Attic not air sealed, not enough insulation, then the whole house will also get heated.
 
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Old 05-26-18, 06:02 PM
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Unless you have non-IC rated recessed in the attic you should have thermal insulation over the boxes.
 
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Old 05-26-18, 06:34 PM
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Ideally the attic should be close to the outside temp. of the outside.
In the winter sure, but in the middle of a summer afternoon with the sun beating on the roof its sweltering in there. The sun has started to go down now and even that metal box cover is starting to noticeably cool.

Its not perfect though... I have issue with condensation in the 60 year old conduits in the attic. Lots of them are rusted on the interiors. I have been slowly trying to re-insulate the tops of the boxes. I also have been opening the boxes and sealing the conduit opening with duct seal. Most of the time I have to remake the connections to get at the openings. So hopefully that is helping.

I also installed a bath fan exhausting to the outside after noticing frost forming above the bathroom on the plywood. Using the fan has helped that.

But short of doing something major, these little things are all I can do being both short on help and money.
 
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Old 05-26-18, 07:57 PM
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Money may be tight, but energy loss will continue to cost you until you can insulate and stop the air flow.
 
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