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Hazard Risk Catagory

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To help workers understand the burn dangers more easily, the NFPA assigns a 0-4 number to hazard/risk categories representing the danger level. The minimum hazard rating for arc blast puts the burn exposure at 4 cal/cm2, which is a NFPA 70-E “Category 1 Hazard” rating. FR apparel must be worn for the “Category 1 Hazard” level. When selecting an FR garment for electric arc hazards, look for labels that show the arc rating as required by to the ASTM F1506 standard below.

NFPA 70 E : Standard for Electrical Safety in the work place

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Required Minimum Arc Rating of PPE cal/cm2

G. D. International

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