I posted this question but for some reason I can't get back into my account:
Most things I see with 220V have both hot legs going through the switch or relay, current "returns" through the switch. Is it against code to wire one leg directly to the equipment and the other leg is switched as opposed to having both legs switched. It seems useless and a waste of wire to switch both legs.
As a bonus question. I assume I need a "motor rated switch" as standard switches can weld due to the high startup current. Is this one legal\safe?