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It depends on the size and efficiency of the unit. Look on the service plate on the unit. It's a sticker the manufacturer puts on. It will have the model and serial number and a max fuse/breaker rating. This will tell you what breaker can be used with that specific unit.

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14y ago
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4mo ago

The size of wiring required for a 240-volt air conditioner depends on the unit's amperage rating and the distance from the electrical panel. Typically, a 240-volt air conditioner will require 10-12 gauge wiring for a 30-amp breaker, and 8-10 gauge wiring for a 40-amp breaker. It's best to consult a qualified electrician to determine the appropriate wire size for your specific setup.

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15y ago

A #8 copper conductor with an insulation factor from 75 to 90 degrees C is rated at 45 amps.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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8y ago

Wire and breakers are sized by the connected load of the air conditioner. This load amperage can be found on the nameplate of the air conditioner. Usually if the manual for the conditioner can be found there is a chart that recommends what the wire size and breaker size should be for that particular model that is getting connected. The load having a motor connected, will have a larger than normal breaker than what is usually recommended for the particular wire size.

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15y ago

The sizing of the wire and the breaker to protect the wire is dependant upon the amperage draw of the A/C unit.

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Q: What size wiring is required for 240 volt air conditioner?
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What happens to your air conditioner if you lose one 110 volt phase?

If it is a 240 volt conditioner it will stop. If it is a 120 volt conditioner it will stop if it is on the leg that has been lost.


If there is a 240V outlet but the air conditioner is only 120V can the outlet be converted?

Answer for USA, Canada and countries running a 60 Hz supply service.How to do this job depends entirely on the Wiring Codes or Regulations for the locality (Town/State) and on the exact location of the outlets you wish to install. Consider if it would be a good idea to leave the existing 240 volt circuit and outlet alone. It would then be available for use for some other appliance in the future. Instead of converting that 240 volt outlet, put in a new 120 volt branch circuit fo the air conditioner unit.A new 120 volt receptacle of the right type and size for your air conditioner and a new 120 volt circuit breaker can be installed in your home's main breaker panel, along with a new cable of the right size to carry the current drawn by your air conditioner unit.If you do decide that you want to convert the existing 240 volt outlet, you must keep in mind that the amperage drawn by the 120 volt appliance must not be more that the current-carrying capacity of the existing wires which were once installed for a 240 volt appliance.For example, if the existing 240 volt circuit is only for 15 amps and the new 120 volt air conditioner needs 20 amps, it will not be safe to convert the existing wiring. New wiring of the correct size must be installed.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.


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