Forum Discussion
pianotuna
Jun 20, 2016Nomad III
Hi GordonThree,
I do know that two summers ago at one site, just running the roof air caused the breaker to trip on the shore power panel. The wiring was up to code at the time it was installed. There should be plenty of amps to run my roof air and fridge when using an autoformer. And in my case the load support feature can (and will) be used to limit the amperage I draw. That should prevent heating of the feeder circuit.
Is it as simple as wattage divided by voltage? i.e. 30 amps @ 120 volts is 3600, so at 110 volts amperage would be 32.72? Is there some "overhead" from the autoformer itself?
I do know that two summers ago at one site, just running the roof air caused the breaker to trip on the shore power panel. The wiring was up to code at the time it was installed. There should be plenty of amps to run my roof air and fridge when using an autoformer. And in my case the load support feature can (and will) be used to limit the amperage I draw. That should prevent heating of the feeder circuit.
Is it as simple as wattage divided by voltage? i.e. 30 amps @ 120 volts is 3600, so at 110 volts amperage would be 32.72? Is there some "overhead" from the autoformer itself?
GordonThree wrote:
If the wiring at the CG is so bad that voltage is severely sagging, how is an autotransformer going to help? As a step-up transformer, it will be trading amps for volts, which is going to heat up the feeder circuit (or worse mains transformer) even more, causing the resistance to increase and the voltage drop to increase.
Canada has an invasive government right? Maybe the health and safety people need to be tipped off as to the unsafe condition of the wiring at this campground? Sounds like an electrical fire waiting to happen.
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