With respect to circuits exceeding 277V, nominal to ground, but not exceeding 600V, nominal between conductors, is it permitted to supply luminaires powered from direct-current (DC) systems (excluding exceptions)? A) No, this is not permitted. B) Yes, if luminaires contain a listed DC-rated ballast that provides isolation between the DC power source and the lamp circuit, and protection from electric shock when changing lamps. C) Yes, if the luminaire contains a listed DC-rated ballast and ...
Website Registration Required to Access this Content
Only registered users have access to Silver content.
Registration on EC&M allows you exclusive access to high value content centered around proprietary research, expert NEC analysis and in-depth technical procedures.