Ummmmmmmmm when i wazzaa appentice 2 of my buddies were sent outta town to take the place of an entire crew that drug up the week before. They had built a step down bank 13.2 to 4 kv i bleve. this was back in the day and bucket trucks were few and far between. They climbed the pole safetyed off and energigized the bank and the pots blew up encasing both guys in a huge fireball. one managed to jump the other hung there until the nylon linking the d rings in his belt burnt into.Both were burnt over 80% and i spent many days and nights sitting with em in the burn ward they were horribly disfigured and in terrible pain. one eventually died and the other lived but his mind was never quite the same.It was determined that the transformer manafacturer ( mcGraw Edison) had had labor relation problems and when the pot was built someone intentionally cut thru the paper insulation used on the windings causing this fiasco. a few hours with those guys was all I ever needed to know about the dangers inherrant in our trade