Quote:
Originally Posted by TurtleKent
If you are hooked up to 50a shorepower, the display will be blank. Not sure why, but all three of my Winnebagos have been that way.
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The reason why it's blank is because of the way the system is designed. RV electrical systems have two side (or legs) with a common neutral. There is an induction loop on the neutral wire. When connected to a generator or 30 amps, both legs are connected in phase to each other. This means that the total of the current through both legs can be measured as the current flowing through the neutral.
When connected to 50 amps, the two hot legs are out of phase with each other (when one leg is positive, the other leg is negative). If you measure the current flow through the neutral when connected to 50 amps, you will only see the difference in current flow between the two legs.
The only way to measure current when connected to 50 amps would be to have an induction coil on each leg.
If you're connected to 30 amps and don't see the current displayed, switch to generator and see if current is displayed. If it does, there is faulty wiring. If it doesn't, the EMS may be faulty.