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What is the highest arc rating of PPE that you/clients use?
4 to 12 cal/cm2
Above 12 through 40 cal/cm2
Above 40 through 75 cal/cm2
Above 75 through 100 cal/cm2
Greater than 100 cal/cm2
N/A
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 Post subject: PPE - Highest Arc Rating?
PostPosted: Sat Apr 10, 2021 4:59 am 
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Joined: Mon Sep 17, 2007 5:00 pm
Posts: 1586
Location: Scottsdale, Arizona
What is the highest arc rating of PPE that you/clients use? (select range of arc rating)

4 to 12 cal/cm2
Above 12 through 40 cal/cm2
Above 40 through 75 cal/cm2
Above 75 through 100 cal/cm2
Greater than 100 cal/cm2
N/A


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 Post subject: Re: PPE - Highest Arc Rating?
PostPosted: Mon Apr 12, 2021 7:08 am 
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Joined: Mon Jan 24, 2011 11:25 am
Posts: 38
Location: richmond, VA
We have done arc flash calculations for all of our quarries and have been successful at mitigating most Electrical panels to be under 8 Cal/cm and provide our electrical techs with 8 Cal/cm clothing. We have a very few situations with a higher than 8 Cal/cm, but have no need to enter those enclosures with power on and have done a great job with labeling as well as training to kill power before working in those areas.


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 Post subject: Re: PPE - Highest Arc Rating?
PostPosted: Mon Apr 12, 2021 11:43 am 
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Joined: Mon Sep 17, 2007 5:00 pm
Posts: 1586
Location: Scottsdale, Arizona
tish53 wrote:
We have done arc flash calculations for all of our quarries and have been successful at mitigating most Electrical panels to be under 8 Cal/cm and provide our electrical techs with 8 Cal/cm clothing. We have a very few situations with a higher than 8 Cal/cm, but have no need to enter those enclosures with power on and have done a great job with labeling as well as training to kill power before working in those areas.


Great to hear! Controlling the risk by reducing the incident energy and establishing an electrically safe work condition are the way to go! Electrical safety has evolved so much over the years. I still recall the days of "The incident energy is... dress for it"


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