Grounding multiplus

DIY
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1

I’m installing my AC system in my van using a multiplus-ii and am hoping for quick clarification on grounding.

I see in victron diagrams the AC system doesn’t have a specific chassis ground anywhere. I also know the multiplus has automatic N-E bonding and a case ground, and so my first question: does the N-E bonding only bond the specific AC input/output wires or is the case also bonded to N on inverter mode? If it’s the latter, I think the case chassis ground would act as the overall AC system chassis ground, otherwise I’d need a separate chassis ground somewhere in the system?

I also understand US electrical code dictates that the DC and AC systems must have separate chassis grounds, however in victron diagrams the multiplus case chassis ground always is routed to the negative DC bus, which would imply a shared AC/DC chassis grounding point.

I must be missing something here…?

2

Basically is there needs to be knowledge of local regulations and follow them. That is the answer.

Clarification is difficult unless the pwrson who answers knows what law governs where you are.

The inverter has a ground point on it somewhere. They are all common.

3

The equipment ground on the case of the Multiplus is for the DC side.

The AC ground is usually handled within main distribution panel of the RV. There will (usually) be a bare wire going from the ground busbar, within the circuit breaker section of the main distribution panel, to the frame of the RV. That’s how it works on my current and prior camper. My DC and AC systems are attached to the frame at different points.

N-G bonding happens at the shore power pedestal.

I am not an electrician and have only a basic understanding of the AC side of things. So take what I’ve provided with that in mind.