Conduit / Exterior Wiring Question


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Old 07-03-12, 08:22 AM
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Conduit / Exterior Wiring Question

Hi all,

I need to move a photocell (in a junction box) around to the front corner of my house because the shrubs keep the mailbox lights on all day by blocking the light. The cell sits about 6 inches up from the ground. I only need to move it 'round the corner; about 4 feet in length.

To save from having to run new conduit around the corner of the house, can I just run a short piece of Romex from the existing box to the new box? Or, is there a certain kind of flexible conduit that would make it easier? I'd just like to stay in code.

Thanks in advance.
 
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Old 07-03-12, 08:28 AM
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Type NM cable cannot be used outdoors. You could use Type UF cable or a piece of flexible non-metallic conduit with individual conductors in the proper colors.
 
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Old 07-03-12, 08:28 AM
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can I just run a short piece of Romex from the existing box to the new box?
No, Romex, NM-b, is not rated for outside use. You could use UF-b cable, similar to Romex but rated for wet areas so long as it is buried it 24"* and sleeved with conduit where exposed above ground.

*If GFCI protected and 20 amps or less it can be 12" deep.
 

Last edited by ray2047; 07-03-12 at 01:15 PM.
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Old 07-03-12, 08:42 AM
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PVC it is. Thanks, guys!
 
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Old 07-03-12, 10:24 AM
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If you use continuous PVC best practice is to use individual wires, such as THWN or THHN/THWN.
 
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Old 07-03-12, 11:18 AM
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@ ray, I thought UF—without conduit--had to be buried 24 inches
 
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Old 07-03-12, 11:31 AM
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@ ray, I thought UF—without conduit--had to be buried 24 inches
Dang! That is the second depth mistakes in one day. I should probably just stop answering posts till my brain clears. I will correct my mistake. Thank you.
 
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Old 07-03-12, 11:49 AM
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LOL!! Trust me I know what you mean!! You may want to wait until after the fireworks—as they will fog your brain to unconsciousness……LOL!!!
 
 

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