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2026-02-12T09:49:56-05:00
2026-02-12 09:49:56
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2026-02-12 true 2026-02 2026-Q1 2026-W07 2026

2026-02-12 09:49:56

Interrupting Rating

  • "short-circuit interrupting rating"

Applies to "Equipment intended to interrupt current".

nfpa-70_110_requirements#110.9 Interrupting Rating.

Maximum current that the equipment can interrupt without damage. Measured in amperes, usually shown as kAIC.

Short-Circuit Current Rating (SCCR)

  • "withstand rating"

nfpa-70_110_requirements#110.10 Circuit Impedance, Short-Circuit Current Ratings, and Other Characteristics.

Applies to assemblies: distribution equipment like switchboards, panelboards, switches, etc.

Maximum current that the equipment can withstand in a short-circuit event without damage. Measured in amperes, usually shown as kA.