A shock can occur when somebody touches a live wire, or uses a tool or machine with poor insulation or that isn't grounded properly. The longer a person is in contact with the electrical current, the greater the risk, particularly if the current enters the body near the heart. Even if the shock itself doesn't seriously injure someone, it might cause him to fall or come into contact with dangerous machinery. Liquids, such as water, grease, wax or oil magnify the dangers when working with electricity. Be careful not to work with electrical equipment while standing in these substances or while working with wet or sweaty hands.
Electrical burns can be another hazard.
People can suffer burns from overheated equipment or from the current flowing through the body. Yet another concern is electrical fires and explosions that usually result from overloading circuits or equipment, which causes them to overheat. Reducing Electrical Hazards When working outdoors, make sure the cords used are waterproof. If it is necessary to use electrical equipment in work areas containing flammable liquids, vapors or dust, be sure the equipment is safe to use around these materials by checking its label. Ask your supervisor if you still are not sure.