Arc Flash & Electrical Safety News

Tuesday, June 01, 2010

Arc Flash Studies - Working Backward

The May issue of Electrical Contractor Magazine has an interesting article describing a way to simplify an arc flash study. Here's how the author, Jim Phillips, introduces the article:

"Would you like to know a little secret about how to simplify an arc flash calculation study? Perform the study backward. Well, not actually backward, it just seems that way."

He describes an approach of starting with the arc flash rating of the PPE and working backward to determine whether the PPE will be adequate.

Read the complete article here.

Labels: Arc Flash Calculations, Arc Flash PPE, Electrical Safety

posted by Steve Hudgik | This Arc Flash Post and 0 Comments | Add Comment | links

Energized Electrical Permits Not Required By NFPA 70E For Common Safety Tasks

A short article in today's American Chronicle points out that there are somec ircumstances in which an energized electrical permit is not required. The article states:

"NFPA 70E has long waived the necessity of an energized work permit for such tasks as testing (voltage, current, phasing, infrared and system tuning), circuit identification, and troubleshooting. In 2009, a fourth exemption was added allowing persons to cross the Limited Approach Boundary for visual inspection (130.1(B)(3))."

The new exemption allows energized equipment to be approached for a visual inspection by a qualified person wearing the appropriate PPE, and as long as that person does not cross the restricted boundary.

Read the complete article here:

Labels: Electrical Safety, NFPA 70E, Safety Inspections