Roger,
The reason that occurred to me is that I've come across many people who cannot tell the difference between 240/415V lines and 11kV lines, or even between power lines and telephone wires. With that in mind, I can easily see somebody being unable to tell fiber optic from power lines, and bearing in mind the actions of this guy, I think it's safe to say he knows very little about electrical matters in general.

Trumpy,
Unless there is some other evidence as to what happened, or even a photo of the "offending" cable, I don't see there's much you can do to help. Without seeing the actual set-up we can only guess as to what happened.

Quote
We have a client who was riding atop a large oilfield skid.....{cut}.... if an energized electric line touched the skid and
electrocuting him in that manner.

I'm not sure, but the first part of this seems to imply that the guy survived. If that's the case, the legal team needs to get its terminology straightened out before taking it to court anyway; electrocuted means "killed by electricity."