The power cord is also commonly referred to as the "shore power cord." This power cord is designed to groound the RV electrical system through the external power source receptacle. It is also designed to carry the voltage and current output from campground power receptacles.
Surge protector (customer supplied)
Occasionally the electrical service provided by a campground may experience low or high voltage (i.e., surges or spikes). Any prologned exposure will shorten the life of the electrical system and appliances. Always incorporate some type of inline sure protection with your power cord. Several styles and types are available for purchase, please consult your dealer for recommendations on power surge protections.