Electrical cable spiking gun, to prove de-energization of a cable.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...n_fullsize.jpg
Previously:
Submarine cable cross-section - photo
Undersea cable armoring GIF
How electricity is delivered - photo
Passivating welds with electrolytic cleaning - GIF and video
Fishing invasive species with electricity - GIF
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