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The calculation for power is:
W=EI W=Watts ( or power) E = Volts I= Amperes W= 120 volts times 20 amps= 2400 watts If the circuit or load will operate more than 3 hours it is considered as a continuous load and the rating of the circuit is lilimited to ,or derated, to 80%or 1920 watts max on a 20 amp circuit. Thou this is rare for residential wiring, many electricians still use this as a guideline for home wiring as a reasonable safety factor, but is not mandatory. |
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