Gauge of extension cord
My trailer came with, what I believe to be, a 25-foot 30-amp power cord that connects to trailer with a round connector with locking ring... fairly standard for trailers from what I've seen. My questi...
Forum Discussion
RonRN18 wrote:
I have installed a Progressive Industries EMS-HW30C in my trailer, so I do get a display of the voltage coming in, as well as the amperage being used (it also displays the frequency of the AC and an error code if something is wrong with the power, but that isn't at issue in this regard).
So because your EMS is a hard wire installed at the trailer end of the incoming main service cable you're seeing incoming source voltage under load, including any voltage loss in the cable. As long as that displayed voltage remains above your PI disconnect threshold voltage of 104 vac you're good to go. Using anything heavier than 10 gauge for your 30 amp rig is nonsense, just keep an eye on your EMS's remote monitor and adjust what you have powered at any given time if you're seeing the voltage get too close to that 104 vac threshold.
