The sockets should all be earthed if they are on mains, (like 13, 15 or 5amp with three pins). It may be that the sockets to which you refer are 12 volt DC that have only positive feed and negative return wires.
Dave.
------------- Never argue with an idiot, they will drag you down to their level and beat you on experience.
Mark Twain.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets
Topic: Upgrading electrics
