This answer is based on the 2017 NEC. A. Outlet boxes for a ceiling paddle fan must be listed and marked as suitable for the purpose, and must not support a fan weighing more than 70 lbs. Outlet boxes ...
A. Ceiling paddle fans must be supported independently of an outlet box or by one of the following means [Sec. 422.18]: (1) A listed outlet box or listed outlet box system must be marked as suitable ...
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