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1 through 4 should be 12 or 14 for 30amps each. 5 and 5 are 40 amp and I would hope they are at least 10 gauge or even 8. If your running connectors they should be ok to use for 12-14 or 8-10 gauge? I think the pass through wires are only 12 gauge. I find the gauge of all the wiring is perhaps one size smaller than it should be.