A double breaker is a breaker that has 2 switches on it. One of the switches is 20 amps and the other is 30 amps.
If the 12,000 BTU A/C only requires 20 amps to run then yes you can use the same 12 gauge wire but you cannot change it to a 15 amp breaker. You will need to install a 20 amp double pole breaker. If it requires more than 20 amps you will have to replace the wiring and breaker.
20 amps on the circuit will trip it unless it is is broken. Then it may trip with a lower current or not at all... Any resistance added to the circuit from a bad or dirty connection will add to the total current causing it to trip sooner than expected.
Depends on what you have connected to the circuit. It is less than 10 amps or the breaker would trip. A rule of thumb is you design for about 80% load related to the breaker. For 20 amps that would equal 16 amps.
The breaker's function is to protect the circuit so that no more than 20 amps flow. The ability to create the 20 amp flow comes from the voltage supplied by the power company and the load you connect to the supply through the breaker. The breaker is just a switch that "opens" if the current flowing through it is to high. It has no role in generating the current.
Yes, a 30 amp double pole breaker would be suitable for a 4800 watt wall heater. Since watts equals volts multiplied by amps, this wall heater on a 240-volt circuit would draw 20 amps (4800 watts/240 volts), which is less than the 30 amp capacity of the breaker.
The maximum amperage rating for a double breaker 20 amp is 20 amps.
The maximum current rating for the circuit breaker needed for a device that operates at 20 amps is 25 amps.
If the 12,000 BTU A/C only requires 20 amps to run then yes you can use the same 12 gauge wire but you cannot change it to a 15 amp breaker. You will need to install a 20 amp double pole breaker. If it requires more than 20 amps you will have to replace the wiring and breaker.
The maximum amperage capacity of a 20 amp breaker box is 20 amps.
The maximum amperage capacity of a 20 amp mini breaker is 20 amps.
The maximum amperage capacity of a 20 amp Challenger breaker is 20 amps.
The maximum current rating for a 20 amp Murray breaker is 20 amps.
The maximum load capacity of a Challenger 20 amp breaker is 20 amps.
The maximum current rating for a 20 amp Siemens breaker is 20 amps.
The maximum current rating for a 20 amp fuse breaker is 20 amps.
The appropriate breaker size for a washer is typically 15-20 amps.
20 amps on the circuit will trip it unless it is is broken. Then it may trip with a lower current or not at all... Any resistance added to the circuit from a bad or dirty connection will add to the total current causing it to trip sooner than expected.