heaudio123135 posts
03-20-2020
8:58am
"3) Measure for voltage from the equipment ground contact to the neutral contact. The neutral contact is the larger of the two slotted holes on the outlet. Make sure the two DMM probes are making good contact. If you measure a good solid 120 nominal voltage then the Hot and Neutral branch circuit wires are reversed on the receptacle outlet. If you do not measure any voltage then you do not have an equipment ground."
I think some clarification here for a novice. When you measure between ground and neutral at a receptacle, most multimeters will indicate some voltage, i.e 0.1 - 2.0V approx.
heaudio123
I think some clarification here for a novice. When you measure between ground and neutral at a receptacle, most multimeters will indicate some voltage, i.e 0.1 - 2.0V approx.
True, If #2 of my previous post above is met. Therein a properly wired receptacle outlet with a Correct AC polarity, and an equipment ground is present.
For the novice a difference of potential, voltage, measured between the neutral conductor and the equipment grounding conductor on branch wiring can be caused by, at least, two things.
1) VD, (Voltage Drop), on the neutral conductor due to the connected load on the branch circuit.
2) An induced voltage that is/may be created by the hot and neutral current carrying conductors onto the equipment grounding conductor.
Jim