I think it is a combination of both the voltage and current that makes it both effective and dangerous.

Spark plugs I think are 30 or 40 thousand volts but very low current. Welders (which will give you a good shock if hands are sweaty) vary but as I recall are around 50 volts but up to several hundred amps. Electric fencers are up there in the high voltage low current category.

Those old hand crank telephone generators must have varied in both depending on how fast you cranked. A slow crank and it would barely give you a buzz. As you increased the speed your muscles would contract and get to where you could not let go till the person on the crank stopped. I suspect that would be considered dangerous and unadvised in today's age but we just considered it fun. We were rednecks and didn't even know the word. Never killed anybody we know of.

Last edited by snrub; 06/22/18 09:21 AM.
John

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