During a winchex in the 80's from a Sea King the winch man we were collecting after the first cct grabbed the harness assembly before it grounded. He collapsed and his heart stopped. He was resuscitated eventually and went on to a fullfilling career. They estimate a charge in excess of 40,000v can be generated in the right circumstances but obviously only with a small amperage.
I haven't heard of any (professional) unit that winches/hoists/sling loads without an earthing strop?
