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The rules are different for <=4 AWG wires versus smaller wires. I don’t know why.
by amluto 3y ago
The rules are different for <=4 AWG wires versus smaller wires. I don’t know why.
- sokoloff 3y agoYou can use tape or heat-shrink to re-identify a wire if its 4 AWG or greater or if it's part of a multiconductor cable (which NM-B is). The reason for the 4 AWG rule is probably an economic one. Having spools of larger conductor cables in a variety of colors is not inexpensive. Allowing the reidentification seems reasonable, though I'd probably argue the cutoff could be thinner than 4. The multi-conductor cable exception is a practical [and economic] one. You might not be able to get multi-conductor cable assemblies with the exact color coding you need.
- donor20 3y agoAhh - makes sense - high amp cables get insanely expensive