Ceiling fans heavier than what weight must be supported independently of the outlet box?

• A. 50 pounds
• B. 75 pounds
• C. 100 pounds
• D. 65 pounds

Answer: (D)

A ceiling fan must be attached to the building structure, not just to the electrical outlet box, when its weight exceeds what the box is rated to support. The box in most installations isn’t designed to carry heavy loads; the usual rating is about 50 pounds. So once a fan weighs more than that, the support must come from the framing (a fan-rated box mounted to a joist or similar structure), not from the box alone.

In this question, 65 pounds is the option that clearly exceeds the typical box rating, so it represents the point where independent structural support is required. The other numbers are at or below that common limit, so they don’t illustrate the need for that separate structural support as directly.