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Message: <blockquote data-quote="Channel Hopper" data-source="post: 687759" data-attributes="member: 175144">The earthing is there to protect the user, not the equipment.Earthing satellite items to a common ground, minimises the internal voltages arising when a system covers more than a couple of floors. It should reduce the static discharge one may get when connecting something to the socket. Additionally the earthing outside equipment is mainly for lightning protection, not that it will do a lot, but it provides one relatively quick path for the strike to ground, rather than through the sockets dotted round the property.Mind you a lot has changed from my time with wiring regs.(oh, and unless it is a new kid on the block, it's Televes)</blockquote>