Arc flash/blast
Arc- phase to phase or phase to ground
Heat- 35,000 degrees
Intense light- from arc
Copper turns to vapor, expanding 67,000 times
Schrapnel- breakers, parts of the panel/ switchgear
Molten metal
Pressure waves- 200 lbs per Sq ft
Sound waves- think of Thunder, only closer,
all of this happens faster than you blink.
These are the things PPE is protecting from, FR PPE protects from secondary injuries, will you get injured in an arc blast while wearing PPE? Probally, just not as severe as you would without.
Check out this video, very good training tool
http://www.electricityforum.com/arc-flash/arc-flash-video.html The link for the video is at the bottom of the page
[This message has been edited by BKey (edited 08-28-2006).]
