How many watts can run through 12-2 wire?

Answer 1

Wire is rated in ampacity, You can use only 80% of the rated ampacity. Voltage and amperage are inversely proportional. So at 120 volts alternating current you safely run 1800 watts ( I have added a small safety margin). At 240 volts you can run 3600 watts.

I hope this has answered you question

Ampsxvolts=watts watts/volts=amps

Answer 2

A 12-2 wire is designed to handle up to 20 amps of current. This would be equivalent to a maximum of around 2400 watts if using a standard 120-volt circuit. It is always important to consult local electrical codes and regulations to ensure proper installation and safety.

Answer 3

A #12 cable is rated at 20 amps however only 16 amps can be connected to this cable.

wattage = amperage x voltage

1920 watts = 16 x 120 (each leg)