14/06/2022
HOW TO DETERMINE THE ARC FLASH RATING
In order to determine the arc rating of a given material, you have to send it for laboratory testing.
Basically, they blow up the clothing or equipment in a lab and see if it passes the test.
What’s the test?
This depends on the type of personal protective equipment you are trying to get rated.
Each type of protection has its own standard (or standards) for testing that it must meet.
Here are the main ones:
ASTM F1506 (arc rated apparel)
ASTM F2178/F2178M (arc rated face shields)
ASTM F2675/F2675M (arc rated gloves)
ASTM F1891 (arc rated rain gear)
During the testing, there are two things that can happen that determine the results of the test and therefore determine the arc rating.
At certain incident energy, you will either reach the material’s Arc Thermal Performance Value or its Breakopen Threshold Energy.
Whichever one comes first dictates the number that goes on the equipment’s tag.
Usually, it’s the arc thermal performance value or ATPV Rating.
https://leafelectricalsafety.com/blog/arc-flash-ppe
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