Strange leakage current
I don’t know for sure how much, if any, this poses as a safety risk so I wanted to throw it out onto the forum for discussion. While laying on a heating pad in the bed I reached up to turn on the reading light and noticed that “feeling” one gets when touching a metal surface that has a slight amount of current that flows through your body to ground. I describe it as if the metal surface is a little “sticky” as you gently brush the back of your hand over it.
1. I did not have a shirt on so I made good contact with the heating pad.
2. The 2 wire heating pad is in excellent condition with no apparent conditions that would provide direct contact to wires, it was not wet, etc.
3. The feeling was present when the heating pad was powered on or off, but not when it was unplugged.
4. The 120 VAC plug next to the bed showed no errors when I checked it with a plug-in tester.
5. I have a Hughes Autotransformer plugged into the pedestal 30A circuit.
6. Using a Fluke NCVT-1 Voltage Tester on the skin of the Airstream indicated no voltage/current leakage to ground.
7. No voltage or current differential between the Airstream shell to earth ground when measured with a multimeter.
8. I do tie the external Airstream coax cables to earth ground as part of my antenna setup. I wonder if this ties the negative side of the 12 VDC power converter to earth ground which subsequently ties it to the 120 VAC ground as well.
9. Using a $30 multimeter, there is no voltage/current shown between myself and the metal on the reading light while laying on the activated heating pad, even though I can feel the difference of this “surface tension” when I brush my hand on the side of the reading light.
2017 25' Flying Cloud
2018 F-250 6.2L Gas
Blue Ox SwayPro 1000#