My slip ring assy has two neutral slip rings. One is tied to the neutral wire of the shore power cord the other, is tied to a ground lug, bonding the neutral to ground at the second slip ring. It appears that the second slip ring is intended for N/Grd bonding.
I have heard that the current NEC book treats an RV, connected to shore power, as a sub-panel. No bonding allowed.
The dilemma is; to bond, or not to bond, at the cord reel?
Tim