This product is for use on a nominal 120-volt circuit, and has a grounding plug that looks like the plug illustrated below. An improper connection of the equipment grounding conductor can result in a risk of an electrical shock. Do not modify the plug that was provided with this product. If this plug does not fit into your outlet, have a qualified electrician install the proper outlet. Adapters, extension cords and surge protectors should not be used with this product. Also, a GFI protected receptacle should not be used. It is recommended to use a 20 amp dedicated circuit.