Here’s Exhibit A why you don’t use an extension cord to plug in your RV.

The other day, I arrived at a service call where the customer had complained about the appliances throwing error codes, the ceiling lights dimming, and low-voltage loads generally not working. These are all classic signs of low system voltage, where the DC side of the RV’s electrical system has fallen below 12 volts. 

>>> READ MORE: RV 101: The Electrical System