What gauge wire do I use
Hello, I want to place a 30 amp breaker in the panel of my house and then run about 200 ft of uf-b cable to a 30 amp rv outlet that I will place near my travel trailer. I would like to have the ab...
Forum Discussion
A search took me to: http://www.paigewire.com/pumpWireCalc.aspx where they recommended 4 AGW copper or 2 AGW aluminum for a 120 volt, 30 amp circuit at 200 ft with 3% tolerance. Change the tolerance to 5% and you can get by with 6 AGW copper wire.
http://wiresizecalculator.net/ came back with 3 AGW copper wire with a 3% tolerance or 6 AGW for 5% tolerance for direct burial.
3% of 120 = 3.7 volts - 120v - 3.7 = 116.3v
5% or 120 = 6 volts - 120v - 6 = 114v
I'd use the 5% tolerance figures.
https://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=1.296&voltage=120&phase=ac&noofconductor=1&distance=200&distanceunit=feet&eres=30&x=48&y=29 Agrees with these figures.
http://wiresizecalculator.net/ came back with 3 AGW copper wire with a 3% tolerance or 6 AGW for 5% tolerance for direct burial.
3% of 120 = 3.7 volts - 120v - 3.7 = 116.3v
5% or 120 = 6 volts - 120v - 6 = 114v
I'd use the 5% tolerance figures.
https://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=1.296&voltage=120&phase=ac&noofconductor=1&distance=200&distanceunit=feet&eres=30&x=48&y=29 Agrees with these figures.
