Expanding AC distribution panel

BFL13 wrote:
The RV 120v "ground" to the frame is the same as the 12v DC "ground" to the frame. They share the frame as "ground".

However the 120v also has white neutral, but the DC has white as "negative" (if black is "positive")

In an RV you can find one or more DC 12v clusters of white wire that then go to the frame.

The 30a 120v shore cord goes to the Main breaker for Black, to the Neutral Buss for White and the bare wire goes to the RV frame via the metal chassis for the 6300 power center.

The lower portion 6300 converter only has two 120v wires, black and white to breaker and neutral buss. It is grounded by its metal chassis touching the main metal chassis, which is grounded via that bare 120v wire to the frame.

The DC fuse panel is "grounded" to the frame several ways as mounted, (including the screws holding it in place AFAIK)

Just to claify I removed the lower converter portion of the 6300.

I'm wondering why some of the wires that were connected to fuses have conntinuity to ground?

e.g. there are two green wires one is connected to the Norcold's frig PCB 12+ input the other green wire has continuity to ground.

That doesn't make sense I currently have the one green wire that goes to the frigs 12 vdc connected to the Xantrex charger pos+ and the frig runs as it should.

There are two or three more wires that also have continuity to ground that were removed from the fuse connection on the Parallax 6300 DC fuse/dist panel.

I don't remember every removing any ground wires from the 6300 dc panel except for the top middle labled battery Neg.

The 6300 dc panel besides the fuse connection has a Conv. Pos+, Battery Pos+ and Battery Neg- that connect to the larger gauge wires that supply power from the converter and the battery to the DC fuses.

I'm stumped why ~three of the wires originally connected to fuses have neg ground?