You will need to use #8 wire.
6millimeter square.
What size is the AC? Look at the power consumption rating of the AC unit; if it pulls anything close to 15 amps, a new breaker will not solve your problem. There should be an information panel that shows the current draw of the AC. If the AC pulls more than the breaker can handle, you need to re-wire the outlet for the AC. You can't safely just replace the breaker with a larger one since that would result in a fire hazard.
Depends on the size of the wire going to the A/C. If the wire is AWG #10 you cannot install a 40 amp breaker. If the wire is AWG #8 you can.
Yes. You should use 8 AWG wire from breaker to AC unit.
You will need to use #8 wire.
3 TON
Your ac contractor or engineer will determine the correct size.
6millimeter square.
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.
the answer is 1.11 ton
2.5 ton
The size of room is enough wich is suitable for capacity of 1.5 Ton A/C The size of room is enough wich is suitable for capacity of 1.5 Ton A/C
P=VI here P=8000 Watts v=220 V I=8000/220 = 37 A so you should use 37A Breaker
45
What size is the AC? Look at the power consumption rating of the AC unit; if it pulls anything close to 15 amps, a new breaker will not solve your problem. There should be an information panel that shows the current draw of the AC. If the AC pulls more than the breaker can handle, you need to re-wire the outlet for the AC. You can't safely just replace the breaker with a larger one since that would result in a fire hazard.
A circuit breaker is easier to design for ac than dc because alternating current (ac) naturally goes to zero 100 or 120 times per second and this helps to extinguish any arc. Therefore an ac circuit breaker would not be suitable for dc assuming the same voltage and current ratings.