What safety precautions must I follow when operating the Big Blue 400D?

Only qualified persons should install, operate, maintain, and repair the unit. Avoid touching live electrical parts as electric shock can be fatal—the electrode and work circuit are electrically live whenever output is on. Wear dry, hole-free insulating gloves and protective clothing made from flame-resistant material. Keep everybody, especially children, away during operation. Always stop the engine before installing, servicing, or connecting equipment. Remove all flammables within 35 feet of the welding arc and keep a fire extinguisher nearby.