One place I worked, we had a breaker for 4160V. I never had to throw it, but it could have been somethign I would need to do. Not good when the arc flash rating is 99 feet. I respect electricity.
During my apprenticeship I had an electrical rotation assignment and I was taken out at 19 years old and with a few semesters of DC/AC circuits under my belt is all to a 400 ton mechanical punch press and the electrician I was working with opened the 550v disconnect pulled the fuses out and removed the feed. So I’m left with a 2 story tall machine that is dead and told to strip everything electrical off the machine except the main motor and junk it.
That was easy enough opening panels and seeing all kinds of old dirty relays and timers and who knows what with switches and pushbuttons labeled this and that and a mile of conduit full of numbered wires. Cleaned it down to the bones and dumped everything into scrap bins.
Took most of a week working alone and when done he comes back and says looks great and hands me a tablet and a pen and said now we are going to wire it and bring it all up to date. I said what’s the paper for and he said to design the circuits you want to make it work. I though what the hell I should have paid attention taking it apart. He said bring your layout to Charley when you are done. Charley was the head guy in the building for this crew. So I take another week drawing a circuit and take it to Charley and he looks at it for about a minute and says pretty good you need to move this to this and he marks red on my ten pages of lines. I thought how could this guy look at that so fast and know anything. He takes me to this other area and said everything you need is in here wire it back up and Norm the first guy will put the power back for you.
So I spend the next month rebuilding this thing from scratch and Norm would check in once in a while and show me some trick to bending conduit etc. I get it done and he comes down with Charley and they look it over and Charley tells him hook it up.
Long story to get to this point when Norm gets done putting 550 to it and new fuses in he walks around the press frame puts a finger in his ear and closes his eyes and faces away and pulls the handle to on. I thought what a clown only later to find out he did that on every switch he threw as he once had one blow him over.
To conclude I don’t know who was more amazed me or Norm that the machine worked even though I never let on I had any doubts. Charley never asked or said a word if it worked or not that I knew of.
I went on for four more years of apprenticeship with about 10 other different assignments and when I graduated the very first guy to offer me a job was Charley. I took my second offer as I was more interested in tool and die making at that point. But to this day I turn my face away from machine disconnects and plug my ear.
The really strange thing was before I retired there were ever changing rules around OSHA. I designed a machine and had my electrical crew wire it and when it came time to power it up first time my electrician leaves and comes back with his arc fault suit onface shield chest protection and heavy rubber gloves. I asked him what was up with that and he said new rules. I was amazed and asked if the operator needs all the gear to power his machine on? He said nope just us electricians.
at some point, some one, will listen 
