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One of the configurations in this question on feeding two nearby subpanels from one main breaker has two wires screwed into each lug on one of the subpanels. Do I need to have a two-wire lug like this one

Two Wire Lug

or can get away with something like this

Double Wire Lug

instead? I've managed to find a digital spec sheet for my subpanels here (both are identical). I intend to have a 6GA Cu and a 2GA Cu wire entering each lug and it seems the current lugs are large enough to accommodate both wires, but I don't know if it's code legal.

Since I don't know when I'll get to feeding each subpanel from a dedicated breaker in the main panel, I'd rather make it code legal in case it stays that way for a while.

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    Code says one wire per terminal, unless the terminal is listed and labeled for more. Check the manufacturer's documentation for the device, to see if it's allowed. – Tester101 Feb 24 '17 at 12:43
  • That's sort of why I posted a link to the panel's spec sheet. I'm guessing that, unless specified for two wires, it is only rated for one wire? – Hari Ganti Feb 24 '17 at 19:06
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Go with 1-wire per hole and get a 2-hole lug, the cost is too minimal not to do it right. This is especially true in your case with 2-different gauges of wire, your situation is not the 2nd picture (using 2 of the same gauge wire). Meaning, differing gauges must have dedicated mountings to be solid and secure.

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