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ekstra   ara
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PostPosted: Sun Oct 09, 2011 4:32 pm 
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Posts: 43
jghrist wrote:
The actual 2012 NFPA does not say "Only One of the Following". 130.5(C) says:

(1) At least one of the following:

a. Avaliable incident energy and the corresponding working distance
b. Minimum arc rating of clothing
c. Required level of PPE
d. Highest Hazard/Risk Category (HRC) for the equipment
...


It looks like there must have been a major change from a draft of the 2012 70E that was circulating out there. This language makes much more sense than the "either / or" language of 2009 and the "Only One" language in the 2012 draft. Glad it changed.


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PostPosted: Thu Oct 13, 2011 9:00 am 
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Location: Lima, OH
the final draft indicates:
(1) At least one of the following:
a. Available incident energy and the corresponding working distance
b. Minimum arc rating of clothing
c. Required level of PPE
d. Highest hazard/risk category (HRC) for the equipment


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PostPosted: Thu Dec 15, 2011 4:09 am 
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Location: Michigan
Where did this table come from?

A King wrote:
I believe you could wear it if you are actually calculating the incident energy. However, if a HRC is assigned based on T130.7(C)(9) then the incident energy listed in T130.7(C)(11) is the required minimum arc rating.

We post the calculated IE and PPE level on the label. The ATPV of the clothing and equipment worn must be greater than the calculated IE on the label. The PPE level is determined by the calculated incident energy and you must wear the equipment associated with that PPE level (see attachment).

So if the calculated incident energy is 9.2 cal/cm^2, you may wear your 11 cal/cm^2 FR pants and shirt but since the incident energy falls into PPE level 3 a flash suit hood is required instead of the face shield and balaclava.


Looking at this table, it appears to be different from how I would interpret all the documentation I have seen. Each catagory is listed with a [b]MINIMUM[b]arc-rating = X cal/cm2. Your table reads the opposite. Example: anything over 8.1 cal/cm2 would fall into HRC 3 for required equipment. This does not seem logical to me. Is this an actual table in 2012 NFPA 70E?


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