The rating of the cable is important too - a 2.5mm core mains lead is required on most UK caravan sites to satisfy IEE regulations [1]; rated to either 20 or 25 Amps (depending on the insulation and grade of copper). Household 4-way adaptor sockets are, as the name suggests, intended for household use indoors.The rating of the cable is important too - a 2.5mm core mains lead

How is a caravan wired?

Generally speaking, a caravan is wired in a similar fashion to a normal house, except for one crucial difference: an RV is connected to mains supply via a 15A flexible power cord, rather than fixed wiring, and can essentially be viewed as a very large appliance.