Electrical Sources in Hazardous Locations Electrical equipment can become an ignition source when it produces arcs, sparks, or excessive heat in an atmosphere containing flammable gases or vapors, combustible dusts, or easily ignitable fibers or flyings. A single ignition can result in a serious fire or explosion. Where hazardous atmospheres may exist, ordinary electrical equipment may not be suitable. Electrical equipment and wiring must be approved and properly installed for the specific hazardous location and material present. What Is a Hazardous Location? A hazardous (classified) location is an area where fire or explosion hazards may exist because of the presence of flammable gases or...

Electrical Hazards – High-Voltage Electrical Burns Electrical contact can cause some of the most severe injuries encountered in the workplace. Electrical injuries may include shock, electrical and thermal burns, arc-flash injuries, cardiac arrest, internal tissue damage, falls, and electrocution. Electrical burns can be particularly dangerous because the injury visible on the skin may represent only a small portion of the actual damage. Why Electrical Burns Are So Serious When electrical current passes through the body, damage may occur at the point of contact, along the current's path through the body, and at another point where the current exits. Electrical injuries may cause: Deep muscle, nerve,...

Electrical Hazards – Anatomy of an Accident Electrical work leaves little room for error. Experience, training, and familiarity with a task do not eliminate electrical hazards. In fact, familiarity can sometimes lead to complacency, shortcuts, or assumptions that a routine task will go as planned. This incident demonstrates how a combination of inadequate planning, poor communication, loss of conductor control, and failure to follow established energized-work procedures can result in a life-changing injury. The Incident A four-person line crew was installing intermediate poles on an existing single-phase 14.4 kV distribution line. Three employees were journeymen with more than 30 years of experience, and the...