12 guage. The most current that can be sustained in 12 Ga wire is 20 Amps. Almost all 12 Ga wire sold for home use can handle 600 volts, so your 220 v A/C is covered.
The voltage rating should appear on the jacket of the wire sheath.
A 220V hot water heater typically requires a double-pole breaker rated at 20-30 amps, depending on the specific power requirements of the water heater. Make sure to consult the manufacturer's specifications or a qualified electrician to determine the appropriate breaker size for your specific unit.
The formula you are looking for is I = W/E.
In North America this size breaker could be used on a welding machine. A range in the home would use a 40 amp two pole breaker.
If the power requirement is 120 volts it will be connected to a single pole breaker rated at the amperage requirement of the air conditioner. If the voltage of the air conditioner is 240 volts, then a two pole breaker will be required.
The size of the breaker needed for a 220V wall heater depends on the current rating of the heater. Generally, for a 220V heater, a 20-amp breaker is common. However, it's important to check the manufacturer's specifications and local electrical codes for the appropriate breaker size.
20 amp In North America code states a two pole 15 amp breaker will do the job.
A 220V hot water heater typically requires a double-pole breaker rated at 20-30 amps, depending on the specific power requirements of the water heater. Make sure to consult the manufacturer's specifications or a qualified electrician to determine the appropriate breaker size for your specific unit.
Take out the double pole breaker, place the white wire on the grounding bar along with the ground wire, install singe pole breaker(size needed) attach black wire onto new breaker and you now have 110 line.
The formula you are looking for is I = W/E.
For a 240-volt circuit that requires a 50 amp breaker, the appropriate size of the breaker needed is 50 amps.
In North America this size breaker could be used on a welding machine. A range in the home would use a 40 amp two pole breaker.
Normally AWG #10 wire on a 30 amp breaker but it really depends on the size of the pump. The pump manufacture will specify the size wire and size breaker needed.
If the power requirement is 120 volts it will be connected to a single pole breaker rated at the amperage requirement of the air conditioner. If the voltage of the air conditioner is 240 volts, then a two pole breaker will be required.
A minimum of 15-amp breaker is "needed", but a 20-amp is often required by electrical code for that situation.
The size of the breaker needed for a 220V wall heater depends on the current rating of the heater. Generally, for a 220V heater, a 20-amp breaker is common. However, it's important to check the manufacturer's specifications and local electrical codes for the appropriate breaker size.
For a 50 amp hot tub installation, a double-pole 50 amp breaker is required.
Remove the 30 amp double pole breaker and install at least one single pole 15 amp breaker. It is best if the other slot is not left open so if you have another single pole breaker of any size install it in the 2nd spot so it isn't open when you replace the cover on the panel. For your 15 amp circuit you need #14 gauge copper wire or larger with a hot, neutral, and ground. Your 30 amp circuit was probably wired with #10 gauge conductors. These will probably work on your 15 amp circuit but it may be difficult to connect #10 conductors to devices.