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. Extension cords are considered temporary wiring, and their use should be minimized.
Grounding is very important because it helps to protect against electrical shock.
Use three-pronged plugs and outlets because they have grounding wires. Fuses and circuit breakers work by shutting off a power line to prevent overheating if there is an overload. Ground fault circuit interrupters are important in wet locations such as locker rooms, school bus wash bays, chemistry labs near sinks, or when maintenance workers are required to work outdoors. GFCI's monitor the current entering and leaving electrical equipment and will shut off the power if the current is out of balance enough to generate a shock. Another control school districts should use is restricting access to electrical rooms by keeping them locked.