Uneven voltages on 50 Amp
When I put my converter breaker on, the voltages on each side of my feed go to 148 and 84. Took my ceiling fan plum out because it had low voltage, disconnected the feed tested 120 and fed the fan wit...
Forum Discussion
larryt1939 wrote:
Thanks for all the replys. This is a Jayco 5th Wheel, 2007. I just went and checked for the jillionth time that there is 120 on both sides and 240 between them. At the disconnect in the garage and the recept at the end of 50 amp direct burial. Checked continuity on 50 amp cable and in breaker box inside the RV. 240 across main breaker 120 from each side to neutral. WA3YEY@yahoo.com
I would check all neutral connections for looseness and/or corrosion. Things may measure OK with a voltmeter when there is no load, but apply a load and a neutral with high resistance due to loose connection or corrosion may act like it's "open" under a load.
One way to check in the RV is to turn off all breakers going to one hot leg, leaving only one hot leg with a load on it. Turn on whatever is connected and see if it works. You need to measure voltage with a load. A neutral with high resistance will cause low voltage under a load like this, and why it's important to have nothing connected to the other leg because the other leg will see high voltage when the one you are testing sees low voltage.
