Securing cable to a wall without conduit is allowed under which condition?

• A. Only indoors
• B. Only above 10 feet
• C. Only outdoors
• D. Under no circumstances

Answer: (B)

This question hinges on where a wall-mounted cable can be left without being enclosed in conduit. The rule is that unsecured or surface-mounted cable can be run without conduit only when it’s placed high enough to be out of reach and not easily damaged—specifically, above about ten feet. At that height the risk of accidental contact, physical damage, or tampering is greatly reduced, so additional protection isn’t required. If the cable were lower, it would need proper protection such as conduit or other raceways and appropriate securing methods to meet damage‑protection requirements. Outdoor installations or lower runs are not covered by this allowance, and there are scenarios where you must use protection regardless of indoor status if the location makes damage likely.