Neutral Bonding

[Roll With The Changes]

I was doing some work on my generator today and it brought up a question.

I'm using a portable generator permanently mounted on the back of the 5th wheel. I installed a second shore power (receptacle? ) on the back and ran it through a transfer switch. In operation, it behaves like a factory built in generator that would be in the front bay. I just have a connector that I can unplug. I have bonded the neutral and ground at the generator so that I have exactly one bonding point when the generator is connected. When on shore power, the generator is unplugged and the one bonding point is at the distribution panel in the park. I think that is the right way to set it up, but somebody please correct me if I'm wrong.

So now my question... How are the factory built in generators set up to avoid two bonding points? If memory serves, the transfer switch only switches the the two lines. (Ground and neutral are hard wired.) That would mean there would be two bonding points (one at the generator and one back in the park somewhere. )

What am I missing?

[FT4NOW]

My transfer switch transfers all 4 wires (L1, L2, G, N) if I recall. I'm 99% sure anyway, thinking back to when I installed my EMS.

[MoonShadow_1911]

[QUOTE=FT4NOW;480949]My transfer switch transfers all 4 wires (L1, L2, G, N) if I recall. I'm 99% sure anyway, thinking back to when I installed my EMS.[/QUOTE @FT4NOW is correct.

[Roll With The Changes]

My transfer switch transfers all 4 wires (L1, L2, G, N) if I recall. I'm 99% sure anyway, thinking back to when I installed my EMS.

Well, now I need to go back and look.

That might answer everything 😁

[Redapple63]

Well, now I need to go back and look.

That might answer everything [emoji16]

Agree with all wires being switched. While I don’t have that setup today, my 50 amp Class A did all four wires through the transfer switch.

Bill

[LMagelitz]

I was doing some work on my generator today and it brought up a question.

I'm using a portable generator permanently mounted on the back of the 5th wheel. I installed a second shore power (receptacle? ) on the back and ran it through a transfer switch. In operation, it behaves like a factory built in generator that would be in the front bay. I just have a connector that I can unplug. I have bonded the neutral and ground at the generator so that I have exactly one bonding point when the generator is connected. When on shore power, the generator is unplugged and the one bonding point is at the distribution panel in the park. I think that is the right way to set it up, but somebody please correct me if I'm wrong.

So now my question... How are the factory built in generators set up to avoid two bonding points? If memory serves, the transfer switch only switches the the two lines. (Ground and neutral are hard wired.) That would mean there would be two bonding points (one at the generator and one back in the park somewhere. )

What am I missing?

The WFCO transfer switch in our 310 switches L1, L2, and neutral. Equipment ground isn’t switched. I also have a Progressive Dynamics PD52 transfer switch, and it’s the same way.

I have a Cummins/Onan QD8000 in our front compartment. It has a sticker on it noting there is an internal N-G bond.

[FT4NOW]

Agree with @LMagelitz , I knew the neutral was transferred, looking at the product manual for the different transfer switches, they all seem to have a grounding bus bar of some sort, but the L1, L2 and N are transferred.

[Roll With The Changes]

Thanks all for the responses.

It turns out that the only thing wrong with this scenario is my memory. I'm sure I thought all this through a couple years ago when I put it all in, but I forgot that I did actually connect the neutral to the big clunky contactor.

No problem here here... except my brain 🤐