Metal enclosures and raceways for conductors added to existing installations of open wire, knob-and-tube wiring, and nonmetallic-sheathed cable are not required to be connected to the equipment grounding conductor where these enclosures or wiring methods are in runs of less than ____ feet.

Question

Quizplus · Accepted Answer

According to NEC 250.86, if the metal enclosures and raceways for conductors are added to existing installations of open wire, knob-and-tube wiring, and nonmetallic-sheathed cable, and if they are in runs of less than 25 feet, they are not required to be connected to the equipment grounding conductor.

Metal Enclosures and Raceways for Conductors Added to Existing Installations