12 volt to 120 volt ground
I've got a 12-volt light above the passenger seat that does not have a good ground. The positive side of the light is getting good voltage and it works when I manually ground it. I removed the light...
Forum Discussion
As mentioned previously, multiple times, the 120VAC ground is connected to the chassis. The 12VDC negative(ground), from both the chassis and coach batteries are also connected to the chassis. So obviously both systems share a common ground.
Not important, oh it's definitely important. It's both wrong and hazardous. I wouldn't want to stand on damp ground and touch your chassis, 60VAC will give you a good tingle. Bare feet and could be deadly. If the chassis ground is floating at 60VAC then there is most likely a fault in supply wiring.
I have seen this situation before and got a shock from the screen door. It was due to mis-wired supply.
wa8yxm wrote:
...The 120 volt ground often sits at 60 VAC believe it or not (I can explain why but it's not important).
Not important, oh it's definitely important. It's both wrong and hazardous. I wouldn't want to stand on damp ground and touch your chassis, 60VAC will give you a good tingle. Bare feet and could be deadly. If the chassis ground is floating at 60VAC then there is most likely a fault in supply wiring.
I have seen this situation before and got a shock from the screen door. It was due to mis-wired supply.
