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A # 10 wire with a insulation factor of 75 or 90 degrees C are both rated at 30 amps.

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Q: What size wire for a 30 amp breaker to ac?
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What size breaker can you use on a 7500watt generator?

Depends on the wire size you are using. If the generator breaker is a 30 amp then install a 30 amp breaker.


What size wire and breaker do you need for a 5000 watt garage heater?

Look on the heater and see what amps it is pulling. That will determine the wire size and breaker size. It must be on a dedicated circuit. 15 amps = AWG # 14 wire with 15 amp breaker 20 amps = AWG # 12 wire with 20 amp breaker 30 amps = AWG # 10 wire with 30 amp breaker 40 amps = AWG # 8 wire with 40 amp breaker


What size breaker should be used on a 20 amp motor?

30 amp breaker with #10 gauge copper wire


How big of breaker do you use for 115 volt?

Depends on the wire size used in the circuit. If you use AWG # 14 wire you must use a 15 amp breaker. If it is wired with AWG # 12 wire then you use a 20 amp breaker. If a AWG # 10 wire is used then a 30 amp breaker is required. The breaker protects the wiring from overheating so you must use the proper size breaker for the wire used.


What size wire for 28 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.


What size breaker does it take to run a outdoor well?

Normally AWG #10 wire on a 30 amp breaker but it really depends on the size of the pump. The pump manufacture will specify the size wire and size breaker needed.


Should 25 amps breaker be replaced by 20 amps?

For typical residential house wiring 12 AWG wire is required for a 20 Amp breaker. If you change out the breaker for a 25 A breaker you would have to rewire the circuit with 10 AWG. In that case you could up the breaker to 30 Amps. All outlets and switches should be rated at the same voltage and current as the breaker.


What size wire for 75 feet of wire for a 30 amp 220 volt oven?

A 30 amp breaker run 75 feet would require you use AWG #10 wire. But, an oven normally pulls more that 30 amps and I would not use #10 wire on a 30 amp breaker for an oven. Normally any newer oven is wired with AWG #6 gauge wire on a 50 amp circuit breaker so the breaker will not trip during heavy use of the oven. Some older ovens could use a #8 wire on a 40 amp breaker.


What size of wire use if you have 6 outlet with 30 amp breaker?

It is unusual to have multiple outlets on a 30 Amp service. If you do this you need outlets rated at 30 amps and 10 AWG wire.


What breaker do you use for 10 2 wire?

Use a 30 amp breaker.


Got new AC code says we need to replace the 30 amp with a 15 amp to pass code can this be done with existing wires safely?

All depends on the size of the existing wiring. If you have a 30 amp breaker on AWG #14 wire then this is an unsafe condition that must be corrected. 15 amp requires that the wire be AWG #14. If the wire is #15 then you can and should install a 15 amp breaker. 30 amp breakers are used on AWG #10 wire.


Can I you use existing 8 3 wire hooked to a 30amp breaker was hooked to old electric heater to wire a heater that requires 10 2 wire its a 5000watt 240volt heater?

Yes the wire size is larger for that size breaker but will not effect the 30 amp breaker protection of that circuit.