Arc Flash PPE - Layering

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MrSafety2777

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Does any one have a good reference point or standard that explains the layering process as it applies to arc rated clothing. I am looking to get a better understanding of this and how it applies to outerwear. Can you just add the protective amounts up to get to the desired level of protection? I am not sure.
 
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jim dungar

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PE (Retired) - Power Systems
There are several factors that go into determining the effect of layering. Ask your clothing supplier.

But, in general 2+2=5, because you get credit for the air trapped between the layers.
 
zog

zog

Senior Member
Location
Charlotte, NC
jim dungar said:
There are several factors that go into determining the effect of layering. Ask your clothing supplier.

But, in general 2+2=5, because you get credit for the air trapped between the layers.
Click to expand...

No, 2+2=4. Layered PPE needs to be tested and rated as a system to get that higher rating.
 
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jim dungar

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PE (Retired) - Power Systems
zog said:
Well your post was very misleading, there is no formula to factor in "credit" for layering.
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I am sorry that a generalization of a potential benefit was so confusing that it obscured my point.

"There are several factors that go into determining the effect of layering. Ask your clothing supplier."
 
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MrSafety2777

Member
Arc Flash PPE - Layering

If it is tough for you two more learned individuals to decide, please imagine how I feel. Thank you for your input.
Understand more questions are coming, OMG!
jim dungar said:
I am sorry that a generalization of a potential benefit was so confusing that it obscured my point.

"There are several factors that go into determining the effect of layering. Ask your clothing supplier."
Click to expand...
 
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