The question of high voltages has been brought up and the dangers therein . Unusually since I first started repairing 1930 tube radios in the 50s I have lost count the number of times I should have died from electrocution . From the UKs -240V AC to 350/500Volts power supplies. From CRT TVs with 20000V or more to the tube but the worst was the large pentode tubes in the TVs with 800V or more at a HIGH current to earth . Arm felt like it had been hit by a sledge- hammer sore for days -lost feeling in fingers for about an hour .Its the AMPS that kill more than the voltage.Luckily it wasnt across my heart.This made me investigate why I survive. It seems that I have thick dry skin which raises body resistance[electrical] I compiled a note book on electrical deaths and the ones more liable to die had fine- moist skin. Those people were most to be found in red-heads and blonds--NATURAL- this seems to be a racial background thing. like Celts-Scandinavian types . In percentage terms they were 3 times more likely to die from electric shock.A bit morbid but just observation over many decades.And try not to let the current run up one arm and down the other[across your heart] as that shortens the odds.Keep one hand in your pocket when working on HV.