Electric shock and fatalities occur on construction sites when temporary power systems are in use. All construction workers who operate power tools should receive training in the systems that safeguard them from electrical hazards. An Assured Equipment Grounding Program is a scheduled system for testing construction site electrical tools and cords to assure their proper grounding, polarity and resistance. A Ground Fault Circuit Interrupter (GFCI) is equipment that serves as a circuit breaker if continuous ground continuity in an electrical tool is not present. When electrical tools and cords are used in connection with the process of construction, and when receptacles are being used which are not a part of the permanent wiring, tools and cords should be tested every month on a scheduled basis, before first use, and when returned to service following repairs. All new employees to the jobsite who use electrical tools should receive training of the electrical safety program.