A luminaire that weighs more than 50 pounds must be supported by other means than its outlet box. Which weight threshold is this?

• A. 6
• B. 16
• C. 50
• D. 35

Answer: (C)

The important idea here is how luminaires are physically supported. Outlet boxes are not meant to bear the full load of a heavy fixture. They have a limited load rating, and if a luminaire is heavier than what the box is rated to support, you must provide support that attaches to the building structure rather than relying on the box alone. This means using a mounting strap, brace, or other fixed support that is anchored to structural members (like joists) or using a box that is specifically rated for heavier loads. This approach protects the box from pulling out or failing and keeps the fixture securely in place.