Class 4 (4th Engineer) MET 📅 Aug 2023

Exam Question

Explain the possible consequences if the following electrical current faults are not rectified: (16)

(a) Earth current leakage

(b) Currents induced into the shafting of rotating machinery

(d) Arcing at contact terminals

(e) Short circuit currents

Reference Answer

### Introduction
Electrical current faults on board a vessel, if not promptly detected and rectified by protective devices, can lead to catastrophic consequences including fire, equipment destruction, and severe personnel injury. The following explains the specific consequences of five distinct types of electrical faults.
### (a) Earth Current Leakage
An earth current leakage occurs when current finds an unintended path to the ship's hull (earth) due to insulation failure or component breakdown. Failure to rectify this fault leads to:

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