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Re: type 1 enclosure
John is correct.
Billy,
Think of it this way: 20 amp breaker feeds a #12 AWG circuit (20 amps), which feeds a 60 amp panel, which has 60 amps of breakers in it.
Question: How much current is going to be able to be drawn through that #12 AWG wire?
Answer: 20 amps - otherwise the 20 amp breaker feeding it will trip.
Okay, though, here is something else to consider: I doubt those terminals (the mains or the neutral) are rated for use with that small of a conductor. The neutral is an easy fix, and I have no idea why it was not done - simply move it to a smaller terminal on that same bar.
Don't forget the open knock out on the right.
Also, that is not the "service equipment" yet the green ground conductor is in the same terminal bar as the neutral - and that is not allowed.
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