Assuming 120 VAC in a residence maximum watts = 15 x 120 = 1800 Watts. For a continuous load you can support 1440 watts which is 80& of maximum. You need 14 AWG gauge wire.
A 12 gauge wire can support a load of approximately 2200 watts.
AWG # 10.
4800
To answer this question a voltage needs to be stated. The formula needed to find the amperage is I = W/E. Amps = Watts/Voltage. Once the amperage is found, the proper size conductor to handle that current can be established. Without knowing the amperage on 400 watts a good guess would be a #14 wire. This wire size is good up to 1440 watts at 120 volts.
5000 watts
A good wire gauge for car radios is 18 gauge. This wire runs between the radio and its power supply from the vehicle.
Assuming 120 VAC in a residence maximum watts = 15 x 120 = 1800 Watts. For a continuous load you can support 1440 watts which is 80& of maximum. You need 14 AWG gauge wire.
To answer this question a voltage has to be stated.
A 12 gauge wire can support a load of approximately 2200 watts.
10 gauge wire will only run up to 30 amps
This is a voltage drop question and a voltage needs to be stated.
AWG # 10.
4800
To answer this question a voltage needs to be stated. The formula needed to find the amperage is I = W/E. Amps = Watts/Voltage. Once the amperage is found, the proper size conductor to handle that current can be established. Without knowing the amperage on 400 watts a good guess would be a #14 wire. This wire size is good up to 1440 watts at 120 volts.
Wire gauge is determined by the capacity in amps. At 120 volts it requires 8.33 amps to provide 1000 watts. The typical residential application would require 18 AWG wire 1.024 mm in diameter.
14 gauge will handle it with a 15 amp breaker. If you use 12 gauge use a 20 amp breaker.