The safest and simplest way to install a home hookup for a recreational vehicle, or RV, is to use a supply pedestal manufactured for the purpose. Supply pedestals are similar to the hookups at most campsites, typically made with one built-in 50-amp outlet, one 30-amp outlet and one or two 20-amp outlets. Appropriately sized circuit breakers are preinstalled, and some feature a usage meter and a switched light for using the pedestal after dark. They are weatherproof and entirely self-contained, set up so that one 50-amp connection to the pedestal supplies all the outlets with their correct voltages.
Locate the breaker box to the home. Open the exterior cover and switch the main breaker to “Off.” The main breaker is the uppermost, largest breaker, usually marked as 100 or 200 amps. Remove the two screws at the bottom of the dead-front panel and lift it away, then test that all power is off using your voltage meter to bridge from the live side to the neutral side.