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.
Although it is not airtight, the enclosure of a totally enclosed motor limits cooling of the windings from the external atmosphere. Motor cooling for totally enclosed motors is typically done by some external means such as a fan or water cooling. Table 2 provides a summary of the NEMA motor enclosure definitions. Table 2. Common NEMA Motor Enclosures. The enclosure is selected depending upon the environment and cooling method in which the motor will be operated. The application environment will determine the degree of protection for personal safety, water, or vapors.