Calculating voltage drop
In determining which size wire to use, what load do we enter when calculating voltage drop when adding a 50 amp RV site when the electric service is a 240 volt, 50 amp breaker and RVs technically run ...
Forum Discussion
BB_TX wrote:
Not exactly true. It is theoretically possible to pull 50 amps thru leg 1 while simultaneously pulling anything from zero amps to 50 amps on leg 2. Or vice versa. The neutral current would vary accordingly. In which case one leg would have more voltage drop than the other. And if one leg were pulling zero current, all voltage drop would be on the leg actually pulling current. A completely unbalanced load is as unlikely as a perfectly balanced load. Still, the voltage drop will not likely be equally shared.
You are correct but it's darn hard to do.. it's also theoretically possible to draw the full 50 amps on both legs but as I said it will never happen.
Figure the voltage drop as though you are going to be drawing 50 amps at 240 volts and you will be good for most RV's
