Re: NFPA 70E Training outcomes - Part III

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Original poster: Sparktron01-at-comcast-dot-net 


All

Terry please affford me this last opportunity to provide link information 
on this subject.  If additional info is desired, please contact me directly 
off-list...

Here are 4 excellent additional links in regards the NFPA70E / IEEE 1584...

<http://www.fluke-dot-com/download/library/1263690_w.pdf>http://www.fluke-dot-com/download/library/1263690_w.pdf

Fluke discussion of DVM safety, arc blast issues, this is current (2002) 
safety information.  A likely arc / blast scenario involving a DVM, and 
meter safety is throroughly discussed.  GREAT INFO!
<http://www.bussmann-dot-com/library/docs/spd02/SPDSection15.pdf>http://www.bussmann-dot-com/library/docs/spd02/SPDSection15.pdf
Excellent discussion of Arc blast / hazards.  Please note test 4, where a 
staged line side fault on the combination starter resulted in an escalating 
"domino" (toward power source)secondary fault in the wire-way above the 
switch.   The wire-way cover is sheared off and hurled into the mannequin's 
helmet / head.  Had this been a person, the cover impact would have surely 
led to severe injury (head trauma, concussion, death) WITHOUT the ensuing 
arc / blast.  Also note the amazing reduction in arc / flash intensity / 
energy by using low peak fuses (minimal i^2t, minimal arc / blast energy).

<http://www.pentaengr-dot-com/arcflash.html>http://www.pentaengr-dot-com/arcflash.html
Additional photos of arc blasts

<http://www.cdc.gov/elcosh/docs/d0500/d000539/d000539.html>http://www.cdc.gov/elcosh/docs/d0500/d000539/d000539.html
Statistics for construction deaths, focusing on electrocution - arc / blast 
injuries.  There is mention of deaths by neon signs (just to reinterate 
that neon sign transformers are NOT "less dangerous" then other HV 
apparatus).  This data for electrical deaths is from CDC database, circa 
1992-1998.  Interesting and revealing.

Be careful out there!

Best Regards
Dave Sharpe, TCBOR/HEAS, Chesterfield, VA   USA