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Old 12-13-2009, 08:41 PM   #1
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What to plug this hole?


When it gets really cold here in Chicago I notice ice build up in the front cover of the service panel. So I opened the service panel and cold air is coming from this hole. Can I stuff fiber glass insulation in that hole to reduce the draft? Or maybe cut 6x6 fiber glass insulation and put in front of the hole? Is that a fire hazard?
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Old 12-13-2009, 08:59 PM   #2
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Kupalino (Poster #1) No. Fiberglass insulation itself is no fire hazard. Only when it makes contact with a heat source, such as light fixtures does it become a fire hazard. But you might have another problem. You have moisture, either in the service conduit or in the panel. The source of it has to be found and stopped. (No matter what) Don't Drink and Drive, Ever!!!
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Old 12-13-2009, 09:33 PM   #3
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Pack it full of duct seal, available in the electrical section of any hardware store / big box store. (It's a sticky brick of claylike putty)

It looks like the original installer put a little "permagum" in there, but it certainly wasn't enough.
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Old 12-13-2009, 10:39 PM   #4
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Yes use duct seal in that conduit. It must be duct seal made for electrical conduit not some other putty or goo.
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Old 12-13-2009, 10:48 PM   #5
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As other guys hit the nail on head duct seal is the best item to work on.

A trick heat up the putty to make it more pileable and grab a hair dryer to heat up that area before you install the duct seal once that get warm then put the duct seal on right away it will lock down pretty good when it cool off.

Merci.
Marc
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Old 12-14-2009, 06:47 AM   #6
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Thanks for the replies.

Now, the upper left corner of that red rectangle, is that ground connection? Is that safe to touch when applying the seal?
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Old 12-14-2009, 06:57 AM   #7
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if it's a ground, it should be fine to touch.... unless the lightning strikes right at that millisecond, then you could have problems..........

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Old 12-14-2009, 12:06 PM   #8
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Dangermouse, that is my question, is that ground connection or not?
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Old 12-14-2009, 12:13 PM   #9
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Yes that is a grounding bushing.
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