The Main Circuit Breaker For This Control Panel Doesn’t De-energize The Panel Introduction This control panel is like thousands of control panels out in facilities today, and maybe even many in your facility. It controls a machine on the factory floor. It has four motor starters, individual circuit breakers for those motor circuits, ice cube…
Avoiding tight fitting clothing is essential if that clothing is being worn to protect you against the thermal effects of an arc flash. NFPA 70E states that the worker must avoid tight-fitting arc flash gear and that loose fitting clothes provide more thermal protection because of the “air spaces.”
When selecting arc flash PPE using the category method; the fault current and clearing time parameters are key to doing it correctly. It’s time we got serious about these parameters
You know your crew needs to wear FR clothing that meets a certain arc rating. But do you understand what that protection level means or how FR fabric gets its arc rating?