OICEW Task 7.1.A

Conduct insulation resistance test

MMA Method

In order to satisfy NVIC 17-14 Task 7.1.A , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Maintenance and repair of electrical and electronic equipment

OICEW-B2 Safety requirements for working on shipboard electrical systems

Maintenance and repair of electrical system equipment, switchboards, electric motors, generator and DC electrical systems and equipment

Detection of electric malfunction, location of faults and measures to prevent damage

Construction and operation of electrical testing and measuring equipment

Function and performance tests of equipment and their configuration:

Interpretation of electrical and simple electronic diagrams
Condition Behavior Standard

On a vessel of at least 1,000 HP, or in a laboratory or workshop,

the candidate plans to lock and tag out an electric motor and uses the Megger to measure and record the dielectric strength of the insulation of the motor through connections in the controller, describing actions as they are being performed.


All The assessment is required for all OICEW endorsements regardless of any limitations for propulsion mode and/or vessel equipment.

The candidate:

  1. Correctly plans for and lays out the job, in proper sequence, and incorporates all safety considerations;

  2. De-energizes the motor circuit;

  3. Employs available mechanical means (e.g., fuse removal, circuit breaker box lock, etc.) to prevent unintentional energizing of the circuit;

  4. Employs a sturdy tag device stating which circuit is de- energized, reason, date and time, and the person’s name who will be working on the motor;

  5. Confirms that the system is de-energized and uses the Megger correctly in accordance with manufacturer’s instructions;

  6. Corrects the reported resistance value for temperature and it is within +/- 5% of the assessor’s solution;

  7. Correctly describes the actions as they are being performed; and

  8. Takes proper action to prevent safety and pollution violations.