Datatek · Jun 1, 2024

Grrrrrr said:
Well, yes, that goes without saying but you can handle thousands of volts with low enough amps. You cannot handle many amps no matter whatbthe volts.

Get hold of an electric fence or the HT of a cathode ray tube or car HT lead, tens of thousands of volts and only milliamps but it will give a nasty shock. For current (amps) to flow through a resistance (your body) there has to be sufficient volts. V/R = I. Thus you can safely touch the posts of a battery that can give 900 or more amps and feel nothing. In the case of the human body, the higher the voltage, the greater the current (amps) if the amps are available as the resistance value is in effect fixed.

R-Two-D2 · Jun 1, 2024

I can imagine that the future 2nd-hand car market will be full of dead hybrid batteries and/or controller issues.
No wonder there are stories of dealers not wanting to take them in part exchange...

DanClarke · Jun 1, 2024

Seen some horrible vids of people almost turned to cinders immediately with high-voltage like the train surfers in India.

pwood999 · Jun 1, 2024

Many years ago I was changing the tube in a high end TV studio monitor. Forgot to discharge it, so when I picked it up, the HV connector hole gave me a nasty belt in the chest. Had to sit down for 30mins after that one. 28,000V hurts !!

Montyjohn · Jun 3, 2024

Datatek said:
Amps do nothing without volts, put your fingers across the post of a 900CCA battery and you will feel nothing because the voltage is too low compared the the resistance of your body. A couple of amps at 400 volts will certainly do you harm.

What shocked me (that pun really wasn't intended, but I'm leaving it) was how little current it takes to kill someone. Between 0.1amps and 0.2amps.
I'm glad we have a fairly high internal resistance otherwise a toy car with 4xAA batteries could easily be deadly.

I don't know if it stands up to scrutiny but my analogy of the current vs volts question is to think of amps as the bullet, and volts as a gun. Harmless on their own. Bullets, like current ultimately do the harm, but they need the gun or volts in order to be driven through your body.

Datatek · Jun 3, 2024

Montyjohn said:
What shocked me (that pun really wasn't intended, but I'm leaving it) was how little current it takes to kill someone. Between 0.1amps and 0.2amps.
I'm glad we have a fairly high internal resistance otherwise a toy car with 4xAA batteries could easily be deadly.

I don't know if it stands up to scrutiny but my analogy of the current vs volts question is to think of amps as the bullet, and volts as a gun. Harmless on their own. Bullets, like current ultimately do the harm, but they need the gun or volts in order to be driven through your body.

That's a pretty good analogy.

Datatek

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R-Two-D2

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DanClarke

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pwood999

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Montyjohn

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Datatek

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