Electrical equipment is required to be field labeled by the NEC (NFPA 70) and OSHA. This requirement is meant to inform personnel working on energized equipment about ...

A few years ago, the term “arc flash” crept into our electrical technical vocabulary. Since that time, performing arc flash calculations remains a challenge for many of us. Calculating incident energy ...

If an arc flash hazard is present, the plant assesses the risk and decides on methods to control that risk. Most plants utilize the services of a subject matter expert to perform the arc flash hazard ...

“When I looked back and saw that I had no pants on the back of my legs, and literally, the skin was hanging off my arms and my legs, I just knew something horrific had happened.” So begins the story ...

In a typical television transmitter installation 30 years ago — at a time when big power was coming into play (three-phase, 460VAC) — power was fed from a transformer located just outside of the ...

The test stand at Schneider's Cedar Rapids, Iowa, testing center shows a typical setup. Seven heat sensors are placed 18 in. from the copper bus bars. The sensors are configured to represent a head ...

Although the electric arc flash hazard only recently has garnered the attention equal to that of the long-recognized hazard of electric shock, the arc hazard is not new. Until the 1980s, occupational ...

Standards and regulations may change, but the danger associated with arc flash hazards remains. Analyzing potential incident energy correctly and understanding what personal protection equipment is ...