A better question is can you run URD for anything other than services. A service does not require an equipment ground generally.Can i use a bare copper wire ran with urd al for equipment ground ( under ground )???????????????????????????????????????
SUB FEEDA better question is can you run URD for anything other than services. A service does not require an equipment ground generally.
If it is being used as USE cable, I don't think you can add an EGC in the dirt next to it and have it comply with the requirement to have all the circuit conductors and the egc be in the same cable."URD" with no other rating is not a NEC recognized wiring method. Often that conductor is also marked USED and/or RHW which makes it a recognized NEC wiring method.
If an EGC is need,a bare CU would be acceptable.
Plexing or twisting conductors does not make it a cable assembly. They are just individual conductors that happen to be twisted together.If it is being used as USE cable, I don't think you can add an EGC in the dirt next to it and have it comply with the requirement to have all the circuit conductors and the egc be in the same cable.
It is a cable if the national electrical code calls it a cable.Plexing or twisting conductors does not make it a cable assembly. They are just individual conductors that happen to be twisted together.
But I don't think they do. I don't think the word "URD" even appears in the NEC.It is a cable if the national electrical code calls it a cable.
Its very common here in Washington to run 3 conductor 4-0, 4-0, 2-0 with bare CU as a feed for mobile homes, direct bury in the same ditchIf it is being used as USE cable, I don't think you can add an EGC in the dirt next to it and have it comply with the requirement to have all the circuit conductors and the egc be in the same cable.