70 Amp Circuit Breaker Wire Size. For a 40 amp you need a 8 gauge wire size and for a 20 amp you will need a 12 gauge wire size. The most common household item that requires a 30 amp circuit is a central air conditioner often people living in rvs use 30 and sometimes 50 amp systems to run all the appliances in the vehicle.
30 amp wire size. The wires are incorrectly indexed white neutral being used as power leg. The wire size chart below shows allowable ampacities of insulated conductors rated up to and.
Also asked what size wire do i need for 60 amps.
The wires are incorrectly indexed white neutral being used as power leg. 80 of breaker max single phase breaker size wire size based on copper thhn wire. Everything i have read tells me that the two hots and the common need to be 4 wire and the ground a 8. The most common household item that requires a 30 amp circuit is a central air conditioner often people living in rvs use 30 and sometimes 50 amp systems to run all the appliances in the vehicle.
