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Safety ArticlesNFPA 70E – Safe Work Practices While Racking Circuit BreakersBy W. Jon Wallace, CSP, MBA Racking circuit breakers is a common task performed by electrical workers. Unfortunately, this task is responsible for numerous serious electric arc flash incidents. The main reason is the moving of parts that must be aligned properly to engage the breaker. Many times these mechanisms are not maintained and cause problems. Over use of force or broken parts tend to cause the issues that lead to arc flash. Another cause is a tool left in the breaker when it is being installed, and thus when energized, a short is caused. The bottom line is movement of energized parts under strain that are not generally properly checked and maintained. Click here to view an arc flash while an employee is racking a circuit breaker. Listed below are some safe work practices to ensure worker safety when racking circuit breakers:
If you have any questions concerning this article or other safety issues, please contact W. Jon Wallace, "The Safety Guru", at 919.933.5548 or by |