Regarding the protection against arc-fault effects in NEC 2026, which new requirement is introduced for specific types of branch circuits in commercial and industrial occupancies?
NEC 2026, Section 210.12(D), now mandates arc-fault circuit interrupter (AFCI) protection for all 120-volt, single-phase, 15- and 20-ampere branch circuits supplying data processing equipment in commercial occupancies.
NEC 2026, Section 210.12(D), requires AFCI protection for all 277-volt, single-phase, 15- and 20-ampere branch circuits supplying lighting loads in industrial occupancies.
NEC 2026, Section 210.12(D), extends AFCI protection requirements to all 120-volt, single-phase, 15- and 20-ampere branch circuits supplying dormitory units and similar sleeping rooms in commercial and industrial settings.
NEC 2026, Section 210.12(D), introduces AFCI protection requirements for 120-volt, single-phase, 15- and 20-ampere branch circuits supplying kitchens and laundries in commercial and industrial occupancies, previously only required in dwelling units.
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