Wattage is volts times amps

that 80% rule is for continuous draw... the breaker trips at the %100 value

Go back to school please

that 80% rule is for continuous draw... the breaker trips at the %100 value

Go back to school please

DC wattage is voltage times amps.

AC wattage is voltage times amps times the power factor.

The 80% thing is a design rule that an electrician has to follow if he wants the wiring to pass inspection.