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Bonding neutral to ground (earth) is accomplished in a permanent electrical panel when the ground terminal in the panel is connected to an earth electrode (8' long copper or zinc clad steel rod driven into the ground). The neutral terminal block and the equipment ground block are 'bonded' by being interconnected via the construction of the distribution panel box. They are both screwed to the metal box with no insulators between the terminal blocks and the metal box (panel). Generators are built so that bonding between neutral and equipment ground (all metal components (engine, frame, etc.) are integral. Any cord with an equipment ground prong, is safely grounded and bonded neutral-to-ground.
When installing an electrical surge protector or electrical management system, always maintain continuity through the system in the RV. Connect all wires including the bare or green insulated wire to proper terminals. If you tap into the supply line entering the camper to install any ems device, and that device does not include a ground terminal (for the green or naked wire), which is highly unlikely,you must provide continuity for grounding by bypassing the device with the ground wire.
If you are connected to a generator and the power grid and use a transfer switch, then the generator frame should be grounded to an earth electrode.
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