There's more pleasant ways to go that are near instant. Getting electrocuted especially on infrastructure around a few kV or lower is a slow death and everything will contract as hard as possible so it'll hurt the entire time you're dying.

Source: work in the power industry and in the past researched exiting methods when my mental health was much worse than it is now.

P.S. For those who need to hear this: Please don't go for a permanent solution for temporary problem(s). Though you may not feel it, we are happy that you are with us and we do care about you. There could be things about yourself or your situation you don't like. Accept where you are now, forgive your past self, then reach out for help. Professional help but also to friends and family depending on who is available to you, you're not a burden or an inconvenience, and it's not weak to ask for help it's the strongest thing you can do. Then unpack those problems with your help and work through them at your own manageable pace. It's fucking hard, but it can get easier. I have faith in you. Good luck and take care.