Which of the illustrated motors has a totally enclosed, fan-cooled (TEFC) motor enclosure? Illustration EL-0001

Correct Answer: Option A — A

Totally Enclosed Fan-Cooled (TEFC) motors are designed to prevent the free exchange of air between the inside and outside of the case. An external shaft-mounted fan blows air over the exterior cooling fins to dissipate heat, ensuring operation in harsh, dusty, or wet marine environments per IEEE 45.