Posted: 20/01/2014 at 23:59
Mine has armoured cable wires run under the paving slabs or buried deep ( 30cm or a foot in old money)under the hedge from the garage. The external sockets are proper outside sockets with coverings. There is an off switch in the garage to isolate the system, and it has its own circuit breaker (residual current device). Mine was fitted by my brother, who happens to be a qualified electrician.
As others above have put, electricity and water don't mix, get someone qualified in.