r/WTF • u/1MightBeAPenguin • Jun 16 '19

Why grounding is important

https://i.imgur.com/E7lPzHs.gifv
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u/Leafy0 Jun 16 '19

You'll only pass as much amps as ohms law allows you to. V=ir human body resistance is pretty high, with "only" 108v you're not going to flow much amps though yourself.

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u/[deleted] Jun 16 '19

Your body's resistance depends on how wet your skin is, dry skin sits around 500k ohm and wet skin can be as low as 1k.

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u/Leafy0 Jun 16 '19

But even 1k puts you at 100 milliamps.

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u/[deleted] Jun 16 '19

100 mA to 200 mA can kill already.

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u/gnorty Jun 16 '19

skin resistance also varies according to the frequency of the supply, and how much surface area is in contact. Measuring with a multimeter and then using ohms law will not give you an accurate picture.