A 30 amp circuit breaker is needed unless the load is a motor circuit, then it has to be sized to 250 percent of the motors full load amps.
For 30A circuit is needed breaker 30*1.25=37.5 --> 40A.
If load is lamp or heater, then use breaker of group A or B.
If load is motor, then use breaker of groupC or D (very hard start) or special safe breaker for motor - with variable amp setpoint.
See related link also.
By code you are only allowed 80% of the rating of a breaker. So 30x80%=24amps.
24 amps is the MAX allowed on a 30 amp breaker. You would need a 40amp breaker for a 30 amp circuit. 40x80%=32. So you would want a double pole 40amp breaker.
A 400 watt heater can safely be used on a 15 amp circuit. The size breaker needed for a circuit is determined by the size of the wiring in that circuit. AWG #14 wire requires a 15 amp breaker. AWG # 12 wire requires a 20 amp breaker.
A 15 amp circuit breaker will handle this situation very well. The smallest home breaker is rated at 15 amp.
AWG #4 copper.
You use the correct size breaker depending on the size wire in the circuit. If the circuit is wired with AWG #12 wire use a 20 amp breaker. If it is wired with AWG #14 wire then use a 15 amp breaker.
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.
The pool light is usually on a 15 amp circuit. The breaker feeding this circuit must have a GFCI rating.
No. Each conductor requires its own circuit breaker. Be sure to match the size of the breaker to the size of the wire. Ex.: 15 amp breaker for #14 gauge wire/ 20 amp breaker for #12 hauge wire.
I think you mean either what is the correct size or minimum wire size needed when a branch circuit is protected by a 20 A breaker. The size is 12 American Wire gauge (AWG). 14 AWG is used for 15 A circuit and 10 AWG for a 30 A breaker. The lower the gauge the larger the cross-section of the wire.
A 15 amp dedicated circuit breaker should be used for the dishwasher. The disposal can be wired to the general kitchen 15 amp circuit.
Normally it is a 20 amp using AWG 12/2 gauge wire. But it really depends on what size wire is on that circuit. If it is white AWG 14 gauge then use a 15 amp breaker. If it is yellow AWG 12 gauge then use a 20 amp breaker.
The sizing of circuit breakers is dependent on the wire size going to the load. A #14 wire is protected by a 15 amp breaker. #12 a 20 amp breaker, #10 a 30 amp breaker, #8 a 40 amp breaker and #6 a 60 amp breaker. These are the most common breakers found in home electrical panels. On motor loads the breaker is sized to 2.5 times the full load amps of the motor. If it is not a standard breaker size then the next size up.