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electrical. What's watts, Volts, Amps and how related?
I'm always confused how I need 20 Amp line or 30 Amp line and related watts or amps. Could someone really smart tell me how they're related?
thanks
3 Answers
- ?Lv 78 years agoFavorite Answer
Example....
As 1000 watts heater running on 120V , it requires current 8.33 ampere passing through the supply line. A 20A line can support 2400 watts device and its feeder wire size at least AWG# 12 gauge.
Whereas a 30A line can support 3600 watts and its wire size is bigger than AWG # 12 to allow more current passing through it. Its relation is ....
Watt = Volt X Current
- 8 years ago
P=VI. Presumably you know the supply voltage and the power rating of the device, so current (Amps) = power (watts) / voltage.
