Originally Posted by Bama Rambler
I took 5picker's comment "If you have 110v in the white wire terminal at the element, you can rule out the element" to mean touching the minus lead of the meter to ground and then the positive lead to each side of the element. In that situation you should read ~120 volts on both sides if the element is good, but the neutral is open. In that scenario, if the element is bad you'll read 120 volts on one side and zero volts on the other.
Ok Guys, I'm still having a problem with this. Maybe we can get it figured out together. My understanding of measuring voltage is the difference in "potential" between two points.
So when you measure voltage, say on the black hot line...you have to use a difference from either the negative or ground (which are actually tied together back at the power source feeding the RV).
When you measure voltage just using the two points on the hot line, you get a zero volts reading (since you didn't use the negative or a ground with zero volts as a difference)
Now, if I am understanding correctly what you are saying, is that with all switches on, there is going to be 120 volts pushing thru the heating element and "thru the neutral wire"........so you are going to be able to check for 120 volts on the neutral side of the heating element.
For you to be able to read 120 volts ONLY on the 'Neutral" wire, what are you going to use as a difference in potential? If you say a ground, then doesn't that mean that there is 120 volts on the neutral wire but zero on the ground.
If there is 120 volts on the Neutral wire, then how are you able to measure voltage at the element using the hot and neutral sides...since the premise is dictating that the hot 120 volts black wire and the white neutral wire are one and the same now being that the voltage is going thru the element to the neutral side. It would be akin to trying to measure voltage from two points on the same wire again...which you cannot do.