Lessons Learned: Electric Shock After Water Ingress To Switch

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IMCA reports of an incident where a crew personnel experienced an electric shock after touching an electrical switch.

What happened

A shore representative visiting the vessel experienced an electric shock after touching an electrical switch in the steering room. Stop the Work authority was exercised; the electrical switch was immediately isolated and subsequently removed for investigation.

What went wrong

  • The switch had been removed from the wall, but not re-installed, during maintenance;
  • There had subsequently been engine room washing following major repairs, and the water ingress arose at that time;
  • The switch had been unprotected and remained live, not isolated, during the engine room washing.

Lessons learned

  • Ensure maintenance work is fully completed before returning equipment or systems to service;
  • Arrange appropriate isolation and protection of electrical connections and switches during any washing or cleaning of an area;
  • Ensure all parts of the vessel electrical systems and equipment are regularly inspected and tested by a Competent Person and the results recorded in the Planned Maintenance System.

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Source: IMCA