If there is an imminent danger, in addition to any other action you take, you should telephone OSHA. Your Right to An Inspection Often, OSHA prefers to investigate complaints by faxing a letter asking about the hazard to the employer, rather than by conducting an on-site inspection.
(November 2014) A Totally Enclosed, Fan-Cooled (TEFC) electric motor is a type of industrial electric motor with an enclosure that does not permit outside air to freely circulate through the interior of the motor. An external fan blows outside air over the frame of the motor to cool it.
Ceiling fan fires are rare. I have never encountered one. The majority of ceiling fans sold in the USA are imported from China, and they are approved by Underwriters Laboratories (UL). UL507 is the general UL Standard for fans. UL507 references UL2111, which is the UL Standard for thermally protected motors.