Where non-power-limited wiring is installed exposed, it must be mechanically protected within how much of the finished floor?

Where non-power-limited wiring is installed exposed, it must be mechanically protected within how much of the finished floor?

• A. Three inches
• B. Seven feet
• C. Six feet
• D. Ten feet

Answer: (B)

Non-power-limited wiring is more hazardous if damaged, so it must be protected where it can be easily struck or exposed to wear. Within seven feet of the finished floor, the wiring is in a zone where foot traffic, carts, and cleaning equipment can come into contact with it, increasing the risk of damage. Requiring mechanical protection in this zone helps prevent cracks, insulation damage, or short circuits that could lead to electrical fires or shock hazards. To comply, run the wiring in protective conduit, conduit-like raceways, or other approved guards so the exposed portion near the floor is safeguarded. Beyond seven feet, the risk of routine contact is generally lower, so this specific protection rule doesn’t apply.

Non-power-limited wiring is more hazardous if damaged, so it must be protected where it can be easily struck or exposed to wear. Within seven feet of the finished floor, the wiring is in a zone where foot traffic, carts, and cleaning equipment can come into contact with it, increasing the risk of damage. Requiring mechanical protection in this zone helps prevent cracks, insulation damage, or short circuits that could lead to electrical fires or shock hazards. To comply, run the wiring in protective conduit, conduit-like raceways, or other approved guards so the exposed portion near the floor is safeguarded. Beyond seven feet, the risk of routine contact is generally lower, so this specific protection rule doesn’t apply.