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Old 10-18-2018, 12:49 AM   #1
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Question Parking deck

. I want to suspend some exit signs just below the Double Tees in a commercial parking deck. I have a weather proof 4 inch round box in the ceiling. I want to drop straight down (about 2') and mount the exit sign. Kinda like fire alarm guys do. Any ideas?? Installation of course must be by the book.
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Old 10-18-2018, 07:56 AM   #2
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A 2' stick of rigid steel.
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Old 10-18-2018, 10:52 AM   #3
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A 2' stick of rigid steel.
And a swivel cover.
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Old 10-18-2018, 10:59 AM   #4
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You should have something that's not going to rotate. And I'm sure the drawings have a minimum AFF to maintain. Over height vehicles tear up parking garages all the time.
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Old 10-18-2018, 11:56 AM   #5
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And a swivel cover.
I like the swivel idea however Code doesn't let you support a box with conduit,
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Old 10-18-2018, 12:47 PM   #6
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and a swivel cover.
i like the swivel idea however code doesn't let you support a box with conduit,
314.23(f)
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Old 10-18-2018, 03:29 PM   #7
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You should have something that's not going to rotate. And I'm sure the drawings have a minimum AFF to maintain. Over height vehicles tear up parking garages all the time.
I seem to remember using a version of these that won't spin around. It's grooved like the pendent for a ceiling fan.
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Old 10-18-2018, 03:31 PM   #8
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314.23(f)
Exception 2
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Old 10-19-2018, 12:29 AM   #9
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Exception 2


314.23 f. I like it. It's the Nec at its finest. The part about SHALL be supported by two or more conduits. That sucks. But then you read Exception 1....cool I can use rigid and get away with using one. BUT....am I forced to then follow Exception No. 2(b)? Some sort of fastening with 12 inches? The rigid? Th box?
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Old 10-19-2018, 08:58 AM   #10
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Just drop 1or 2 pieces of kindorf/channel & be done with it. Check the specs on the concrete, so, you miss the cables.
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