09-02-2019, 05:23 PM
Backfeeding a panel is (or at least used to be) code-compliant provided that a main breaker larger than 50A included a hold-down clip to make sure the breaker would stay in the panel. Large mains have enough thermal variance to walk themselves up off the stabs; in some panels, the main is bolted onto the bus to avoid this problem.
Note that this works because AC breakers have no "polarity", unlike DC breakers.
Aesthetics: I would use a full-size 30A and a couple of half-size 20A, making the "main" visually obvious.
Note that this works because AC breakers have no "polarity", unlike DC breakers.
Aesthetics: I would use a full-size 30A and a couple of half-size 20A, making the "main" visually obvious.