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In North America the smallest size breaker found in a home distribution panel is rated at 15 amps
Minimum size is 10 gauge with a 30 amp breaker. To be safe I would install an 8 gauge with a 40 amp breaker.
Use only AWG # 10 copper.
Number 10 thnn copper wire.
Need motor voltage, amperage and phase to give you an anwer.
In North America the smallest size breaker found in a home distribution panel is rated at 15 amps
50 amps
50 amps
Minimum size is 10 gauge with a 30 amp breaker. To be safe I would install an 8 gauge with a 40 amp breaker.
There is not a minimum measurement requirement for a size of a room for it to be considered a bedroom. A room can be considered a bedroom if it has a closet.
Read the literature for the ac condensing unit, or the tag on the outside of the unit. Minimum circuit ampacity= minimum breaker, wire and fuse size. Maximum circuit ampacity= the maximum size. Your circuit breaker, wire size and disconnect fuses should all be at or between those 2 numbers.
A minimum of 15-amp breaker is "needed", but a 20-amp is often required by electrical code for that situation.
Use only AWG # 10 copper.
Number 10 thnn copper wire.
Need motor voltage, amperage and phase to give you an anwer.
I assume your sizing the 20 amp from the breaker? NEC 240.3 states minimum conductor size for the rated ampacity of the circuit breaker. In this case, minimum size for 20 amp breaker is 12 AWG. I assume you are wiring a motor? I suggest you size your over current in accordance with NEC, start reading around NEC 430.
When installing a circuit breaker, you size the breaker based on the wire size. The breaker should be matched to the ampacity of the wire to ensure proper protection against overloads and short circuits. The device being controlled by the breaker is not a determining factor in sizing the breaker.