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Which frame of motor is preferred in moist surroundings?
1. Drip proof
2. Splash proof
3. Totally enclosed fan cooled
4. Open type

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Correct Answer - Option 3 : Totally enclosed fan cooled
  • Electric motor with totally enclosed fan cooled (TEFC) frame 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.
  • This motor is arguably the most commonly used motor in ordinary industrial environments.
  • TEFC enclosed motors usually cost more than open motors but offer increased protection against weather, dirt, and moisture.

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