Remember, high voltage power lines are not insulated. Also, be aware that there are laws that prohibit any work within six feet of lines that carry between 600 and 50,000 volts, and require a minimum distance of 10 feet from these lines when operating boom-type lifting equipment. No extension cord can be kinked, tied in a knot, crushed, cut, or bent and still insulate the electrical current safely. An extension cord that is misused in this manner may cause a short circuit, fire or even electrical shock. Don't use extension cords in areas that receive a lot of traffic because not only will it cause someone to trip, but constant traffic will wear out the insulating rubber cover.
Extension cords are to be used temporarily and never as a permanent source of power to equipment.
As mentioned, water and electricity do not mix. In fact, water is an excellent conductor of electricity, and if water is thrown on an electrical fire, it will only spread the fire. Instead, use a chemical fire extinguisher. Make sure you know how to operate a chemical fire extinguisher and where the nearest one is in case of emergency. If you have questions or have difficulty locating an extinguisher, ask your supervisor for help.