Forum Discussion
DrewE
Sep 20, 2018Explorer II
The size of the inlet for power from the generator (and also the wire going to the transfer switch) would mainly depend on how big a generator you think you might want to hook up at some point. If you'll never have anything more than a 2 kVA generator, then a 30A inlet would be wasted.
Assuming there aren't tight cost constraints, I would at the least wire with 8 gauge 3 conductor + ground wire which is sufficient for a 40A 120/240V connection (9.6 kVA). The inlet can be smaller and relatively easily upgraded if need be. Rather obviously you should not have an inlet rated for more current than the wiring can handle, but having one with a lower rating is okay.
Assuming there aren't tight cost constraints, I would at the least wire with 8 gauge 3 conductor + ground wire which is sufficient for a 40A 120/240V connection (9.6 kVA). The inlet can be smaller and relatively easily upgraded if need be. Rather obviously you should not have an inlet rated for more current than the wiring can handle, but having one with a lower rating is okay.
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