Salvo wrote:
What's wrong with connecting a couple of wires to inverter to verify?
SoundGuy wrote:
Been following this discussion for 3 pages now in case there's something I too can learn but have to admit I must be missing something here - as suggested, why not just power up the inverter and measure it's output to determine it's design? :h
Partly because I wanted to figure this out before I wired it up into its final position. Mostly, however, because it wasn't (isn't?) clear to me that simply measuring 0V between neutral and ground is sufficient evidence. It's certainly a
necessary condition, but not a
sufficient one? That is, any two unrelated pieces of metal that I poke will generally measure 0V, so does it prove anything? Certainly a non-zero measurement would be strong evidence
against bonding, but why is the inverse true?
On the other hand, the ohmmeter measurement seems like positive evidence in favor of bonding.
Salvo wrote:
No, it's not adequate to just use and ohmmeter.
The only way you will know for sure is if you measure voltage. Many inverters have a internal switchable bond. Meaning, when on shore power the inverter bond is open and when using inverter the neutral-to-ground bond is made.
Right - I was aware of that, but that would simply mean that a "non-connection" measurement when off doesn't exclude bonded GN when running. In this case I measured no resistance when off, so it is apparently bonded when off, and there is no pass-through or anything else on this model, so am I wrong in assuming it must be bonded full time?
