Electric switch is outside in water heater compartment. Hard to see normally black toggle switch which may have a safety pin thru it. We run ours strictly on hydro when available with no problems. Saves alot of propane. Just make sure it is switched off when not filled with water and connected to electricity as if it runs dry you will burn out electric heating element.
2008 Cardinal 30RKLE 5th wheel sold
2006 Rockwood 2607, 2001 Traillite
55 nights 2009, 53 for 2010
44 for 2011, 38 for 2012, 35 for 2013, 51 for 2014