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Hi all, I'm planning for the future. My "big purchase" this year will be an autoformer. On long runs (150 feet) should I do cord then autoformer then RV. Or should it be autoformer then cord the...
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Hi Salvo,
I would be using #10 cord (a 120 foot and a 30 foot) and plugging into a 50 amp shore power service while drawing up to 30 amps on one leg.
Voltage drop is in the range of 8% (pretty high) for #10 wire. That takes it down to 110 from 120.
The other leg will be 20 amps X 2 and I'd be using #12 cord (x 2). That leg will not be going through the autoformer. Each 20 amp would be doing no more than 13 amps into resistive loads. These would exhibit 6% drop to 112 volts.
My inclination was to put the autoformer at the RV.
I would be using #10 cord (a 120 foot and a 30 foot) and plugging into a 50 amp shore power service while drawing up to 30 amps on one leg.
Voltage drop is in the range of 8% (pretty high) for #10 wire. That takes it down to 110 from 120.
The other leg will be 20 amps X 2 and I'd be using #12 cord (x 2). That leg will not be going through the autoformer. Each 20 amp would be doing no more than 13 amps into resistive loads. These would exhibit 6% drop to 112 volts.
My inclination was to put the autoformer at the RV.
Salvo wrote:
Do you have a 150 ft extension cord? What size conductors? That could be a huge voltage drop. Will an autotransformer correct a 20V drop?
