Calculated Arc Flash Cat. 2

[farmaped]

When the calculated arc flash hazard is Category 2 (i.e. 4-8 cal/cm^2), does NFPA 70E, 2009, require the 8 cal face shield (w/ wrap-around guarding) only, OR, is the balaclava also required?
My interpretation does not require a balaclava to be worn in conjunction with the face shield at <8 cal. calcualted levels.
Am I right?
Thanks.

 

[VinceS]

Your question, needs more information..

Your question, needs more information..

If your truly going to get a answer the task and voltage category need to be provided.
ie. 130.7(C)(9) on 600v class switchgear:
Voltage testing would require the HRC 2* ( Level 2 with hood or face shield and balaclava )
Opening hinged covers to expose bare energized conductors and circuit parts requires only HRC 2.

 

[zog]

There seems to be some confusion here, either you have a calulated Ei or a HRC. Which is it?

 

[farmaped]

Calculated.
calculated

 

[billsnuff]

relevant interpretation link

relevant interpretation link

http://www.bnl.gov/esh/esc/PDFs/2 STAR.pdf

although dated 2006 i believe it is still relevant................

what say you, zog

 

[zog]

Calculated.
calculated

When you have a calculated Ei you need to have all body parts covered with PPE rated with ATPV's> than your Ei that would be exposed to >1.2 cal/cm2. 130.7 (C) (1), (3), and (5).

So yes, you need the balaclava.

 

[farmaped]

Thank you for the references. Exactly what I was looking for.
Indeed, 1.2 - 8 cal/cm^2 (calculated) requires the use of a properly rated face shield AND balaclava.