The formula you are looking for is W = A x V.
6 amps.
No.
The total load in watts would be W = A x V. 20 x 120 = 2400 watts. Any wattage higher than this will trip the breaker and shut the circuit off. <<>> The theoretical resistive load is V/I...
A #12 copper wire, insulation 90 degree is rated at 20 amps.