I would recommend #8 AWG for any residential wiring application for 40A.
No, #10 wire is only rated for 30 amps. For a 40 amp circuit you would need to use a #8 wire.
A #8 copper wire with an insulation factor of 90C is rated at 45 amps.
#8 RW 90 degree wire.
Wire is not sized by voltage. It is sized by current measured in amps. Some common copper wire sizes and their current capacities are: 15 amps -- 14 gauge wire 20 amps -- 12 gauge wire 30 amps -- 10 gauge wire 40 amps -- 8 gauge wire
In cooper electrical wire, gauge 8 means the wire size assigned by the American Wire Gauge (AWG) system. That is why you always will hear about AWG WIRE, it's not the type of wire is the gauge that we are talking about. A gauge 8 wire will be used for connections requiring from 40-45 amps to a maximum of 73 amps. (24 for power transmission). Diameter of an 8 AWG wire is 0.12849 inches. 8 AWG is solid, not stranded.
A #8 copper wire with an insulation factor of 75 or 90 degrees C has an ampacity of 45 amps. A #8 wire with an insulation factor of 60 degrees C has an ampacity of 40 amps.
You should never try to use more than 15 amps through a 14 gauge wire.
I am assuming that this is a one and a half HP motor. To wire a 120V 20A motor the electrical code states that the conductor has to be 125% of the motor's full load amps. This equals 25 amps. There is no wire rated at 25 amps so the next size up is 30 amps. A #10 copper wire with an insulation factor of 60, 75 and 90 degrees C is rated at 30 amps. To carry this to a conclusion This #10 wire should be protected by either 60 amp non time delay fuses or 35 amp time delay fuses or a two pole 50 amp breaker.
The amps that a four gauge wire will handle will depend with the thickness of the wire. If the wire is thin, the four gauge will handle 95 amps.
Wire is not sized by voltage. It is sized by current measured in amps. Some common copper wire sizes and their current capacities are: 15 amps -- 14 gauge wire 20 amps -- 12 gauge wire 30 amps -- 10 gauge wire 40 amps -- 8 gauge wire
Generally 40 amps continuous or 50 amps surge is safe.
A #8 wire with an insulation rating of 75 or 90 degrees C is rated at 45 amps.
In cooper electrical wire, gauge 8 means the wire size assigned by the American Wire Gauge (AWG) system. That is why you always will hear about AWG WIRE, it's not the type of wire is the gauge that we are talking about. A gauge 8 wire will be used for connections requiring from 40-45 amps to a maximum of 73 amps. (24 for power transmission). Diameter of an 8 AWG wire is 0.12849 inches. 8 AWG is solid, not stranded.
140 AMPS
30 amps is how much a 10-2 wire will carry at 110 feet. 10 gauge wire is only good for thirty amps per the national electrical code. Using 80% of the breakers usage you will actually be getting only 24 amps.
A #8 copper wire with an insulation factor of 75 or 90 degrees C has an ampacity of 45 amps. A #8 wire with an insulation factor of 60 degrees C has an ampacity of 40 amps.
You should never try to use more than 15 amps through a 14 gauge wire.
I am assuming that this is a one and a half HP motor. To wire a 120V 20A motor the electrical code states that the conductor has to be 125% of the motor's full load amps. This equals 25 amps. There is no wire rated at 25 amps so the next size up is 30 amps. A #10 copper wire with an insulation factor of 60, 75 and 90 degrees C is rated at 30 amps. To carry this to a conclusion This #10 wire should be protected by either 60 amp non time delay fuses or 35 amp time delay fuses or a two pole 50 amp breaker.
70 amps.
15 amps