Acme, GE, Square-D.
Shielded is recommended but not essential. If it's going to be in living space, go for Q rated for no hum. For a few more bucks, consider providing balanced power but derate the output by half. Equitech's site has some useful info.
Shielded is recommended but not essential. If it's going to be in living space, go for Q rated for no hum. For a few more bucks, consider providing balanced power but derate the output by half. Equitech's site has some useful info.