Toolbox Talk: Arc Flash Prevention
An electric arc flash is when an electrical current passes through the air between a “hot” conductor and ground, or between “hot” conductors (while opening or closing disconnects). Temperatures can reach 35,000 degrees Fahrenheit.
Eighty percent of all electrical injuries are burns resulting from an arc flash and ignition of flammable clothing. A primary factor of serious arc flash is the available fault current.
Points to Remember:
1. Work on equipment de-energized if at all possible.
2. Only qualified employees are permitted to work on or near energized equipment.
3. Read all signs warning of “Arc Flash Hazard” around equipment that has the potential for arc flashes.
4. Wear appropriate PPE when working within the arc flash protective boundary. The type of PPE depends on the electrical work being done.
5. Follow safe work practices when working on or near live circuits.
6. Cordon off the limited approach boundary and ensure that all unqualified people do not enter this area.
7. Ensure all tools used are electrically insulated tools and inspect tools before each use.
8. Do not wear any conductive articles of jewelry and clothing.
