#14 copper wire is rated for 15 amps.
In cooper electrical wire, gauge 8 means the wire size assigned by the American Wire Gauge (AWG) system. That is why you always will hear about AWG WIRE, it's not the type of wire is the gauge that we are talking about. A gauge 8 wire will be used for connections requiring from 40-45 amps to a maximum of 73 amps. (24 for power transmission). Diameter of an 8 AWG wire is 0.12849 inches. 8 AWG is solid, not stranded.
A. It's 240 volts & B. Wire size is a function of amperage. 12-gauge wire is used with 20 amperes or less. So, 12-gauge wire can be used with 120V/20A or 240V/20A. Keep in mind though that 240V in the U.S. has 2 live 120V lines so if you encounter a white wire, it's probably an unmarked live & should be repainted as black or better yet, red (to indicate the 2nd live wire).
For a 500 watt light at 120 volts, you should use a 14-gauge wire to ensure that it can safely handle the load without overheating or causing a fire hazard. This wire gauge is suitable for a maximum continuous current of 15 amps, which is sufficient for a 500 watt load at 120 volts.
6ga should be used. It might not be against codes where you are,and you might have a 50amp installed for something that only uses 40amp, but it should be done right, and 6ga should be used off of a 50amp breaker.
For a 20-amperes circuit, a wire gauge of at least 12 AWG should be used to ensure safe and efficient operation. Choosing the correct wire gauge will help prevent overheating and potential hazards in the circuit.
A 10 gauge wire can handle a maximum amperage of around 30 to 40 amps, depending on the specific type of wire and the conditions it is used in.
An 18 gauge wire can typically handle a maximum amperage of around 16 to 22 amps, depending on the specific type of wire and the conditions it is used in.
For a 15 amp circuit, a 14-gauge wire should be used.
For a 30 amp breaker, a 10-gauge wire should be used.
For a 60 amp breaker, a 6-gauge wire should be used.
The maximum ampacity for an 18 gauge wire is typically around 16 amps.
The maximum current rating for a 20A wire gauge is 20 amperes.
The maximum amperage for 10 gauge wire is typically around 30 amperes.
The gauge wire used for lights should typically be between 14 and 18 gauge, depending on the wattage and distance from the power source.
The maximum amperage rating for 18 gauge wire is typically around 16 amps.
For a thermostat installation, it is recommended to use 18-gauge wire.
A 4 gauge wire can typically handle a maximum amperage of around 100 to 150 amps.