Aboard ship, in a workshop, or using an approved simulator, given access to an electrical distribution system, and proper tools and safety equipment.

Performance requirement

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

Describe operation of ground fault detection systems

Define a ground fault

State common causes of ground faults

State behavior of ground lamps

Operate ground fault simulator

Introduce ground fault and observe behavior of ground lamps

Introduce a second ground fault, and observe behavior of circuit breaker


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


  1. Table A-III/1 OICEW-B2.3
  2. NVIC 17-14 Task 7.3.A

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