ETO-L3.1

Safe isolation and electrical safety

ETO-M3 · Function 6: Maintenance & repair · ETO-M3-A Electrical maintenance fundamentals

This lesson covers the safe isolation sequence an ETO must follow before working on shipboard electrical equipment, and the underpinning electrical safety knowledge — proving dead, lock-out, arc flash, and insulation testing — assessed in the MCA oral examination.

Independent preparatory study aligned to the MCA Electro-Technical Officer (STCW III/6) oral examination syllabus (MIN 654 section 5). Not an MCA-approved course and confers no CoC credit. AI-drafted content pending subject-matter-expert review.