2:47 - the heating tube has a WIRE inside of it, a heating element, which is INSULATED from the outer tube itself by some sort of heat-resistant "mineral" powder (either very fine quartz sand or crushed ceramics - or such), and elecric current runs through this inner wire ONLY, so please "don't talk trash". "Open" heating elements (like heating metal spirals set in a channel in a plate made of heat resistant brick-like stuff) are "electrified" but then the current always goes (most of it anyway) through the path of the least resistance, which in this case would be "to the neutral terminal" so not any real risk of deadly electrocution, unless you'd be standing barefoot on a wet metal plate which is earthed. ONLY if the spiral breaks (it does after some time of usage, as the red-hot nickel alloy exposed to air oxidises "slowly but surely") AND THEN you'd be tempted to touch this part of the broken circuit WHICH IS CONNECTED TO THE LIVE TERMINAL there'd be some substantial risk involved in it. Touching THIS type of heater shown here would give you only burns - unless it was kept in very humid place and not used for prolonged period of time, which causes the inner insulation to get wet AND kinda conductive (which happens in places like Singapore, which is a very humid place, but even then the shock is rather mild as the wet insulation still retains substantial resistance - ask me how I know...).
@MIH031911 күн бұрын
I speak from experience... I got electrocuted (obviously not fatally, as the current flowing through me is definitely a lot smaller than the current through the heater as you mentioned) from touching the iron stand, so either the insulation of the heating element is broken or there is no insulation at all.