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Old 08-15-2015, 10:39 PM   #1
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Plastic weather proof FSB box

I was doing some wiring outside and used a plastic FSB box.

I had to run conductors from two places to this box then from there to a third location...this over several days and it rained every day, so I had to open and close the box cover multiple times.

By the time I am all done, I noticed the four metal screws that go onto the weatherproof cover have already chew through the four holes on the box one too many times so the screws spin and no longer very tight.

I can't change the box now that all the conductors are in and the boxes and conduits are glued.

I could try using larger diameter screws, but they may break the plastic screw holes on the box.

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Old 08-16-2015, 08:48 AM   #2
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Fill the screw holes with epoxy, let the epoxy set up, drill be holes, insert screws.
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Old 08-16-2015, 09:06 AM   #3
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Or the old trick, glue in a few tooth picks.
My electrical answers are based on 2014 NEC, you may have local amendments.

Location: Coastal South Carolina
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Old 08-16-2015, 11:38 AM   #4
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Or Teflon tapa around screw.

Or galvanized sheet metal / sheet rock screw

Or get a blank cvr and drill and use the other four holes.
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Old 08-19-2015, 04:18 PM   #5
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Had this happen to me as well. Drilled out the holes and used #8 sheet metal screws instead. The threads are coarse enough you should not have this problem.
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