The manufacturer recommends grounding this generator to reduce the risk of electric shock. You can ground it by tightening a grounding wire around the grounding nut (placed on the front panel). The best solution is to take the standard No.12 AWG copper wire. Connect it to a copper, steel, or brass grounding rod that’s inserted into the earth. And don’t forget about OSHA grounding requirements. You can also use this portable generator without grounding if you’re on a boat, but don’t touch it without gloves then.