zmVault/timestamped/2026-02-12_09-49-56.md

id, title, tags, daily

id	title	tags	daily
2026-02-12T09:49:56-0500	2026-02-12 09:49:56	status/draft topic/construction/electrical	2026-02-12

2026-02-12 09:49:56

electrical-construction

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.