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- #2

Gold Member

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The short, safe answer, would be to consider any voltage "DEADLY" if you have no information about the current.

- #3

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. . . because without knowing the current, you really don't know.The short, safe answer, would be to consider any voltage "DEADLY" if you have no information about the current.

- #4

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You need to look at the resistance of your body. Let's say that this is about [itex]3000 \Omega[/itex], you can calculate the current flowing for a given voltage. A current of 30mA is considered deadly, but there are more factors involved, p.e. the resistance varies in case your hands are dry or not, the fact that it is DC or AC (DC is more dangerous because it does not go through zero every 50 or 60 times a second, therefore more difficult to cut), etc.

As an example consider [itex]U=230V[/itex] and [itex]R=3000\Omega[/itex], you get about [itex]77mA[/itex], so deadly, on the other hand [itex]U=110V[/itex] with the same resistance gives about [itex]37mA[/itex], so lesser change of death, but indeed dangerous. Consider every voltage as dangerous and being carefull is the best remedy.

best regards,

coomast

- #5

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DC is more dangerous because it does not go through zero every 50 or 60 times a second, therefore more difficult to cut)

In fact, Edison tried to prove otherwise! Remember the historical debate between Edison and George Westinghouse on DC versus AC ? An elephant lost it's life in the bargain when Edison electrically executed a rogue elephant with AC power to prove to the world the that AC voltages can be fatal.

regards,

Shahvir

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