240v 20 Amp Outlet Wiring. Wiring a 120-volt circuit off of a 240-volt circuit can be useful where there is primarily 240 volts available. 6 is sometimes mandatory for a 200 foot 12 amp run but can be used up to 300 feet on a 12 amp circuit.
For example a 20-amp circuit should have 12-gauge wiring that is rated for 20 amps. More information wiring diagram for a 20 amp 240 volt receptacle. I had to install a 240V outlet in our garage to run my Plasma cutter.
With this wiring both the black and white wires are used to carry 120 volts each and the white wire is wrapped with electrical tape to label it hot.
It is actually two 120-volt circuits which share the neutral or common wire. For example a 20-amp circuit should have 12-gauge wiring that is rated for 20 amps. I had to install a 240V outlet in our garage to run my Plasma cutter. In this wiring a 30A 240V outlet is wired for dryer where the neutral is needed as well.
