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What happened?
A team was performing pre-rigging and messenger line installation works on a wind turbine.
A mobile generator was connected to the cable plug leading to the low voltage distribution box, which was linked to the lighting system on the upper platform of the transition piece (TP).
When switching on the generator, the lights on the platform did not turn on.
A worker went to investigate and found an open end cable by the voltage box. When he picked it up, sparks were observed.
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Why did it happen?
The cable leading to the distribution box was unterminated (not connected).
Cables were disconnected during commissioning, but it was not documented. This resulted in workers not being made aware of this before starting the job.
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What did they learn?
Verify cable terminations and plugs to distribution boxes before attempting to connect generators. Report any open end / unterminated cables.
If cables are disconnected during commissioning / other stages, record the changes so working teams could be informed.
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Ask yourself or your crew
What is the worst that could have happened?
What are the hazards posed by open end / unterminated cables?
How do you check cable terminations before starting work? What other checks do you need to perform today?
How can you document / access the records of changes made during commissioning?
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What happened?
A team was performing pre-rigging and messenger line installation works on a wind turbine.
A mobile generator was connected to the cable plug leading to the low voltage distribution box, which was linked to the lighting system on the upper platform of the transition piece (TP).
When switching on the generator, the lights on the platform did not turn on.
A worker went to investigate and found an open end cable by the voltage box. When he picked it up, sparks were observed.
Why did it happen?
The cable leading to the distribution box was unterminated (not connected).
Cables were disconnected during commissioning, but it was not documented. This resulted in workers not being made aware of this before starting the job.
What did they learn?
Verify cable terminations and plugs to distribution boxes before attempting to connect generators. Report any open end / unterminated cables.
If cables are disconnected during commissioning / other stages, record the changes so working teams could be informed.
Ask yourself or your crew
What is the worst that could have happened?
What are the hazards posed by open end / unterminated cables?
How do you check cable terminations before starting work? What other checks do you need to perform today?
How can you document / access the records of changes made during commissioning?
A team was performing pre-rigging and messenger line installation works on a wind turbine. After connecting a mobile generator to a light system, the lights did not turn on when the generator was switched on. A worker went to investigate and found an open end cable.
