Fuses Stop Electric Shocks? Wrong! How to Teach Earth Wires

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I have to admit that I did not know this before I filmed this video.

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Комментарии
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Current takes all paths. The element has actually lower resistance. A 3 kW kettle has just 19.2 ohms. However, while the kettle uses 13 A, only 0.1 A can kill. Also the wire can get completely loose so that it does not connect to the heating element.

The earth wire does not go to the earth on a TN system. It goes to the transformer via a copper connection. On a TT system it goes to the earth but then the resistance is so high that it does not blow the fuse. On TT one must have an RCD to make it safe.

One should abandon the term "earth wire" and use the proper term the CPC (The circuit protective conductor). That tells what it does without giving false implications how it does it.

okaro
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I'm a bit confused about how the fuse blows up.
please explain

sanbhai
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Guess what I'm building over half term!

matloo
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I'm confused by the video title... Was it meant to say "Fuses prevent electric shocks? Wrong!"?

nickwiggett