Dave Plowman (News) wrote:
I'm thinking of building in one of those Lidl battery chargers in the old
car. So it can be left on float when not in use. The mains lead on those
is only two core and the case plastic. I was considering a Buccaneer
weather proof mains connector mounted in the body below the rear bumper.
Should the car body be connected to mains earth?

I would say yes. Treat the whole car as an appliance - it has a metal
case and can't be certified as double insulated, so the case must be
earthed.

Things get more complex for a boat, where galvanic corrosion in salt
water needs to be considered, but for a car I'd certainly connect the
body to the earth in the connector.

Pete