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Arc rating
The value attributed to materials that describes their performance to exposure to an electrical arc discharge. The arc rating is expressed in cal/cm2 and is derived from the determined value of the arc thermal performance value (ATPV) or energy of breakopen threshold (EBT) (should a material system exhibit a breakopen response below the ATPV value) derived from the determined value of ATPV or EBT.
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- Part of Speech: noun
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- Industry/Domain: Fire safety
- Category: Prevention & protection
- Company: NFPA
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