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Old 10-05-2014, 07:09 AM   #1
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2-2-2-4 URD cable


Can I use 2-2-2-4 Aluminum URD to connect a 100amp subpanel box? I was going to use the 4 gauge aluminum wire as the ground (it's an attached garage - just the way everything is laid out, I think it's going to be easier to run it underground than through finished drywall)
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Old 10-05-2014, 07:24 AM   #2
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Just a side note, the NEC does not recognize URD as a wiring method, you would have to make sure it has a USE-2 type insulation or XHHW.


URD without another listing cannot be used for any NEC application.

USE without another listing can be used for NEC applications outside only due to no flame rating.

Duel listed USE/RHW can be used for NEC applications inside and outside.

Last edited by stickboy1375; 10-05-2014 at 07:30 AM.
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Old 10-05-2014, 03:04 PM   #3
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Type USE (underground service entrance) #2 is only good for 90 amps and would require at least a #6 equipment grounding conductor.
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