I have a question for all you electricians out there. I am currently wanting to apply for a job as an electrician. This place doesn't require certification but it does require a general knowledge and also knowledge of 4160 voltages. I am wondering what exactly is there to know about it. I am currently seeking this job at an amusement park.
What you need to know about 4160v is that you don't even consider messing in your wildest dreams with it unless you have been thoroughly trained. Working with 120/240v and 208y/120 is somewhat forgiving depending upon the circumstance because there is 120v to ground. A 240/120, 3ph 4w system can have 208v to ground depending upon the phase you are tangling with. Then there is the 480y/277v system that has 277v to ground where there is a lot of 277v lighting that has caused more than its share of electrocutions. 4160v is a whole giant leap above 480 that has 2400v to ground which is never to be questioned as to be totally unforgiving and with almost all certaintly will result in death. The best advice that I can give to you is to take an apprenticeship in a business that works with 4160 on a regular basis and take a safety course in working with it. It is best to know what you don't know and hire a qualified person to do that work no matter what anybody says and don't ever let anybody convince you otherwise. So please take the 4160 very seriously no matter how attractive the job may be.
Stay away unless you have SPECIFIC knowledge. That's all you need to know.
The link below is a 13 minute long video on electrical hazards and injuries at voltages under 600v. Be warned, some parts are quite graphic. Now imagine the severity of a 5000v contact...if the voltage doesn't kill you, the force of the blast knocking you across a room, off a ladder, etc surely will.
You will also NEED to know what THEIR specific (not "general") procedure is for Lock-out/Tag-out (LOTO). The rides have many safety features(limit switches, fuses, etc) built in to protect the general public (ie, paying customers)...but what protects YOU from an accidental start? LOTO.
4KV cable requires special termination and probably stress cones. This type of system has nothing to do with the standard 600 volt and below installations. Anything you know about 600 volt systems is not applicable. As the others have said this may not be for you.
I;ve worked with 4160, 13800, 12470, 7200 and under 600 volts I;ve found most electricans know much if anything about this higher voltages and wiring methods. Even the code does not address them as it should. Its been getting better ever year. Just my two cents worth
Just a little side story...while working on the structure over a 25kv catenary line for trains, I was the last man on the steel - it was my job to remove the ground from steel...in my haste, I removed STEEL first >WRONG< I got wacked with the induction from the parallel catenary lines, that hurt like hell.
I have never forgotten that "lesson" from some 20 odd years ago.