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It is possible but dangerous and illegal. The reason for having circuit breakers is to open the circuit when there is an over current fault condition. Your AC unit may be designed to draw 20 amps but if something goes wrong within the unit and it starts to draw more current, the breaker won't trip until serious damage has been done.
If there is only 20 amp wire ran to the AC unit and there is a short circuit or some other similar fault, the wire will likely melt or catch on fire before the breaker trips.
It may be safe if you have wire rated for 90 amps ran to your AC disconnect and have 20 amp fuses installed in the disconnect.
What else can I help you with?
What gauge wire to run off a 20 amp breaker?
Use AWG 12/2 with ground.
Is it safe to use a 15 amp outlet on a 20 amp breaker?
No, it is not safe to use a 15 amp outlet on a 20 amp breaker as it can lead to overheating and potential fire hazards. It is important to match the outlet's amp rating with the breaker's amp rating for safety.
Is it safe to use a 20 amp outlet on a 15 amp breaker?
No, it is not safe to use a 20 amp outlet on a 15 amp breaker as it can overload the circuit and pose a fire hazard. It is important to match the outlet with the appropriate breaker amperage for safety.
Can you use a double pole 15 amp breaker in place of a 20 amp single pole breaker for a 12000 BTU air conditioner?
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.
Can you use a 20 amp circuit breaker for an electric dryer?
If you are referring to a cloths dryer, the answer depends on the requirements of the dryer. Most dryers require AWG#10 wire with a 30 amp fuse. If the wiring is AWG#12 then use a 20 amp breaker but never use it on AWG#10 which requires a 30 amp breaker. If you are referring to a hair dryer then yes a 20 amp breaker is fine.
What amp breaker for 12-2?
AWG 12/2 requires the use of a 20 amp single pole breaker.
Can you hook a 15 amp and 20 amp breaker to a breaker box using 20 amp wire?
If the full load amps rating of the motor on the name plate is exactly 15 amps you need to use # 12 wire. If it is a longer run you may have to go up one more wire size. The breaker size you need is 30 amps.
What kind of wire do you use for 120 volts and what amp breaker do you use?
#12/2wground & a 20 amp breaker should be enough for lights,receptales.
What amp breaker do you need for a run of 10 outlets?
It depends on the use of the 10 outlets. 20 amp is the norm. If this is in a shop with heavy loads then you would have to break them up.
Is it safe to use 10 gauge wire on a 20 amp breaker for a microwave?
No, 10 gauge wire requires the use of a 30 amp breaker. A 20 amp breaker is only used on 12 gauge wire.
What size amp circuit breaker should be used for 110 outlet?
The size breaker you use is determined by the size wire used in the circuit. If you use AWG #12/2 wire then use a 20 amp breaker. If you use AWG # 14/2 then use a 15 amp breaker.
Can you use a 20 amp breaker if the amp rating on a heater is 21 amp?
No, a breaker needs to be loaded less than 80 percent. As they reach their tripping point they get hot. The circuit rating, breaker and wiring is not designed for 21 amps. The next size would be a 25 to 30 amp breaker that has #10 wire feeding it.
