People do all sort of crazy things with their cars, because the fearsome "brother-in-law effect". ("Hey, what a nice diesel injection pump do you have here, lets add the frying chips oil to 'clean' it!"). Of course they end with a broken car, while refusing adamantly to admit that the car is broken.

I'll shamelessly take advantage of your experience. Lets assume that you are trying to repair a sizeable electric stove, with or without wheels; what advice would you give to avoid being zapped?