A #6 RW 90 copper wire is rated at 65 amps. <><><> As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
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For a 240 volt 60 amp circuit, you should use 6 AWG copper wire or 4 AWG aluminum wire. Make sure to consult the local electrical code and consider factors such as distance and insulation type when selecting the wire size. It's always best to consult with a licensed electrician for proper installation.
Depends on the length of wire you need. The longer the length of wire, the more resistance it has, and the more heat it will generate. Thus, you'll use a larger gauge of wire to reduce the overall resistance in order to counteract the resistance caused by the length of wire.
Using the WIRE SIZE CALCULATOR on the related link, I get #10 copper wire as a conservative estimate.
For a 70 amp service at 240 volts, you would typically use a wire size of 4 AWG copper wire. This wire size is suitable for carrying 70 amps of current safely over a 240 volt circuit. Be sure to consult local electrical codes and regulations to ensure compliance with requirements in your area.
Yes, no problem at all going to a larger ampacity of wire. Larger size wire yes, smaller size wire no.
No. You will need a 14/3 with Ground.
A 3/0 copper conductor with an insulation rating of 90 degrees C is rated at 225 amps.
AWG # 10 wire on 30 amp circuit.