You
mention loose strands, I bet the strands were very fine to
keep the cables flexible. I think welders use that type of
stranded wire too.
In
Charleston we have the Aircraft Carrier Yorktown. I am
fascinated by the emergency wiring terminals, huge 3/8"
terminal holes with set screws at all the bulk heads.
I also
use the industrial terminals on our camper. The last two
photos are of my DCC circuit breakers. The mixed bunch protect
the boosters, the long group protect the rails.