Yes, as long as your fixtures don't require more than 1650-watts in an 110-volt supply.
ACTUALLY:You should never exceed 80% of the capacity of a breaker. If you actually used the 1650 Watts the breaker would trip because it would have reached the maximum capacity.Make certain that the maximum current draw on any circuit does not exceed that 80% limit.
AWG 12/2 requires the use of a 20 amp single pole breaker.
Remove the 30 amp double pole breaker and install at least one single pole 15 amp breaker. It is best if the other slot is not left open so if you have another single pole breaker of any size install it in the 2nd spot so it isn't open when you replace the cover on the panel. For your 15 amp circuit you need #14 gauge copper wire or larger with a hot, neutral, and ground. Your 30 amp circuit was probably wired with #10 gauge conductors. These will probably work on your 15 amp circuit but it may be difficult to connect #10 conductors to devices.
Yes. An everyday occurrence of this circuitry is in your kitchen counter split receptacles. The top half of the receptacle is a 15 amp circuit and from the same breaker the bottom half of the receptacle is another 15 amp circuit. A two pole single handle breaker is a common trip. If one of the circuits fed from the breaker faults the other connected circuit will shut off also. If you are talking about slot position in a breaker panel, you can remove the two pole breaker and install two single pole breakers.
The purpose of a 50 amp single pole breaker in an electrical circuit is to protect the circuit from overloading by interrupting the flow of electricity if the current exceeds 50 amps.
The purpose of a single pole 50 amp breaker in an electrical circuit is to protect the circuit from overloading and overheating by interrupting the flow of electricity when the current exceeds 50 amps.
Replacement for American Switch single pole 15 amp circuit breaker
A 32 amp fixture can not be fed from a 20 amp breaker as the breaker will trip every time.
A tandem 20 amp breaker is designed to provide two separate circuits in one breaker slot, allowing for more circuits in a limited space. It is different from a standard single-pole breaker, which only provides one circuit per slot.
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 appropriate double pole 30 amp breaker to use for a dryer installation is a 30 amp double pole circuit breaker.
Replacement for American Switch single pole 15 amp circuit breaker
Washing machines in the U.S. operate on 120 volts. That requires a single pole 20 amp breaker and wired with 12/2 w-ground wire. Black to the breaker, white to the neutral bus bar, and copper ground to the ground bus bar.