I recently installed a 60 amp sub panel with several dedicated 240 volt circuits in my garage.
One of the dedicated circuits is a 30 amp line for my air compressor!
The compressor is wired to an old AB magnetic starter that has a 120volt coil & uses the old style overload heaters. On these old AB starters (and a lot of newer ones) the overload relay is normally connected to the neutral wire, If the relay is overloaded it breaks the neutral connection to the coil & this results in disconnecting both of the 240 volt power lines.
I know that switching the neutral is a no no & a code violation with normal wiring, But I believe there's a special provision for motor starters that disconnect all power when the neutral wire is disconnected?
Assuming that there is some sort of special provision for motor starters, Would adding a switch to the control circuit of a magnetic starter be allowed?
Basically what I would like to do is replace my garage's main light switch with a double pole switch & connect the compressor's neutral line to the other side of the light switch. This would prevent the compressor from running after I leave the garage for the day, "Providing I remember to turn the lights off"
Doug