Arc Flash & Electrical Safety News

Blog Author Steve Hudgik

Wednesday, May 16, 2007

Arc Flash Myths and Misconceptions

Daryl Lewellyn of Lewellyn Technology has written a good article about the wrong "knowledge" and misunderstandings people have about arc flash. Many of these come from trying to apply past experience to arc flash, and that is not always the best thing to do.

The article is available in PDF form at:

It covers five myths:

1. A current limiting fuse will always reduce the arc flash hazard

2. The arc flash hazard downstream will always be less than upstream

3. An arc flash analysis is about labeling panels

4. We don't have to do an arc flash analysis because we do regular infrared scans of our equipment

5. NFPA 70E is mostly about arc flash

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