On a vessel of at least 1,000 HP, on a simulator, or in a laboratory.

Performance requirement

Behavior Standard
The student will: During assessment, the student shall, at a minimum:

Disassemble a squirrel cage induction motor

  • make or note match marks
  • remove end bells
  • remove rotor

Test insulation resistance and stator winding continuity

  • use 60 second insulation resistance test
  • discuss meaning of results

Reassemble the motor

  • ensure match marks align during reassembly
  • ensure rotor turns freely after reassembly


Assessed in EN‑4231 Sea Term IV: Marine Engineering.


  1. Table A-III/1 OICEW-B2.1
  2. NVIC Task

See the Assessment Guidelines for additional specifications of behavior and standards.