Smouldering coiled extension cable

  • Safety Flash
  • Published on 12 August 2019
  • Generated on 14 April 2026
  • IMCA SF 19/19
  • 1 minute read

While ventilating a manhole in the engine room, the fire alarm was triggered when an electrical extension lead overheated, melting the insulation and started smouldering.

What went wrong?

Investigations confirmed that the electrical extension lead was not laid out in the correct manner and was still around 80% coiled. Also, the extension lead was the incorrect specification for the task of providing power to the blower.

While ventilating a manhole in the engine room, the fire alarm was triggered when an electrical extension lead overheated, melting the insulation and started smouldering.

What were the causes?

  • Seafarers were unaware of the need to run out all the extension lead when using them.

  • The extension leads available on board were not of an appropriate or correct specification.

What lessons were learned?

  • Provide correct, fit for purpose specification extension leads.

  • Ensure coiled electrical leads are unwound totally prior to use and include such instructions in safety management system (SMS) and on coil casing.

  • Positive: All fire systems were operational, checked, drilled and crews reacted immediately alarm sounded.

What actions were taken?

  • Thorough audit of all extension leads to ensure correct specifications, and removed all non-approved leads.

  • Add electrical lead management to power and hand tools procedures, training and challenge tests in vessel SMS.

Latest Safety Flashes:

MAIB: Sinking of tug Biter with loss of two lives

MAIB has published Accident Investigation 17/2024 relating to the girting and capsize of tug Biter with the loss of two lives.

Read more
Dropped object – strop parted over sharp edge

A cylinder was lifted to a height of approximately 6 metres over deck of the vessel, the sharp steel edges of the cylinder cut through the firehose protection and caused the strop to part.

Read more
Person injured when pry bar slipped

A crew member who was applying downward pressure to their pry bar to lift a track, fell towards the deck when the pry bar slipped.

Read more
MSF: High potential near miss during FRC maintenance

The Marine Safety Forum has published Safety Alert 26-01 relating to an incident where there was an unplanned lowering of an FRC to the sea

Read more
BSEE: Crane incident leads to serious facial injuries

BSEE has published Safety Alert 512 relating to a crane incident during well abandonment which led to a worker being struck and suffering serious facial injuries.

Read more

IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of the entire offshore industry.

The effectiveness of the IMCA Safety Flash system depends on the industry sharing information and so avoiding repeat incidents. Incidents are classified according to IOGP's Life Saving Rules.

All information is anonymised or sanitised, as appropriate, and warnings for graphic content included where possible.

IMCA makes every effort to ensure both the accuracy and reliability of the information shared, but is not be liable for any guidance and/or recommendation and/or statement herein contained.

The information contained in this document does not fulfil or replace any individual's or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.

Share your safety incidents with IMCA online. Sign-up to receive Safety Flashes straight to your email.