Exam Question
(a) How bus bar inspection and maintenance is carried out? (10)
(b) What are safety precautions taken during doing maintenance on the busbar? (6)
Class 4 (4th Engineer)
MET
📅 Dec 2025
Reference Answer
### (a) Bus Bar Inspection and Maintenance (10 Marks)
Bus bar inspection and maintenance is a critical task for ensuring the reliability and safety of the ship's electrical power distribution system. The procedure is typically divided into two categories: periodic live inspection and comprehensive de-energized maintenance, usually performed during a dry dock or planned blackout.
#### 1. De-Energized Comprehensive Maintenance
This procedure is performed only after the system is completely isolated and de-energized under a strict Permit-To-Work (PTW) system.
Bus bar inspection and maintenance is a critical task for ensuring the reliability and safety of the ship's electrical power distribution system. The procedure is typically divided into two categories: periodic live inspection and comprehensive de-energized maintenance, usually performed during a dry dock or planned blackout.
#### 1. De-Energized Comprehensive Maintenance
This procedure is performed only after the system is completely isolated and de-energized under a strict Permit-To-Work (PTW) system.
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