@Glomoro By now I completely forgot what the chapter and the manga were about and I had to reread. It was meh.
Challenge accepted.
Point first: You don't die in an instant this way.
If you step on a live exposed wire with one foot, you will exactly fall because of muscles in your leg contracting before being a bit fried, but not die instantaneously because oh no all your body is shocked now. Pfft.
Point second:House appliances are bad at murdering people because electricity at home is weak.
Now, accounting for wire position and location this happens in, contact with the wire will be broken and, even if it weren't , he would just have one leg less. My older brother had to do wiring and got shocked by your pathetic 220v a couple of times, and judging from him being almost unhurt, it is clearly not enough to kill unless gotten through heart or brain. Our skin has resistance good enough to weaken it.
When you speak of live wires, you speak of transmission wires that run at high voltage and create a super-intense field of spreading electrons when touching the ground. Which is not the case at home, because oh no building materials are dielectric and power is puny.
Point third: Surprise, breakers!
If you manage to get shocked, electricity will leak out of system through his leg, let's imagine, into other cable, causing a short circuit. And what will happens when electricity leaks just a bit too much? A breaker click. System just shuts everything off, potentially freeing the guy and preventing him from being dead.
Point fourth and final: No magic for you.
Guy was clearly displayed zapped to death, so whatever you say about magic not applies here at all. No excuses for bad writing will make bad writing good.