madmikejt12

ouch!!!

Someone Electro

He didnt make it right?

No i that episode they ware tring out the electroical aplience in the bath tub mith.Salt puts out ions on water and makes it very conductive.

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_3iMaJ

Water itself is not a conductor, the solution needs to have a salt dissolved into its components to carry the charge. Basic chemsitry.

akg

Basic electrochemistry 8)

Someone Electro

Yes water by it self is an insulator.

But tap water has impuretys that make it slitly codnuctive.

Disolving lots of salt in it make it a suprisingly good conductor.

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danielsmusic

i am suprized at the poll results, every one i have asked about it had said "no" very defensively. they allways say "mix water and electricity, and you will die" there must be one short circuit in the sea and millions of people swim there and they are alright. water out of a tap has a high resistance is nothing is added, and even in the sea where there is billions of tonnes of salt in the sea. i bet nobody had died in the sea from a man made electrical current.

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zachtheterrible

Daniel, it really depends on the situation. A short circuit in the sea would kill someone if they got in the path of the current. Have people been killed by electric eels I wonder?

I had someone tell me about a guy who went out to turn off the spotlights at a football game after the game. it had rained and the field flooded and he got shocked.

Two 120V leads seperated by a mile of water will not shock anyone because the resistance between them would be too high.

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audioguru

It is true that he got shocked. The mile of water guaranteed its very good connection to ground and the submersed skin area of the man guaranteed he was also grounded. His high amount of submersed skin area reduces the effective resistance of the high-resistance water and the high-resistance of a smaller amount of dry skin.
He touched the wet switch which is probably operated at much higher than only 120V due to the lights' high power and the high voltage jumped over the wet switch and into him. ZAP! :cry:

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zachtheterrible

This and the guy that got shocked are two different examples.

Although, I'm rethinking what I said about the two 120V leads in a body of water seperated by a mile . . .

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danielsmusic

hmm, what about this situation then.
what if i drop a desk lamp in to the bath while i am sitting in it. i have salt and minerals mixed with the water as well. would the current flow to me or through the fillerment

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zachtheterrible

Most likely the bathwater would be grounded and the electricity would end up flowing through you.

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Nigel Goodwin

I watched Mythbusters this afternoon, they were checking the viability of being killed by an electrical appliance falling in the bath (presumably using the weedy 110V mains over there?).

Basically they decided it was PROVED, different appliances gave different results, but an iron, a toaster, a hair drier, and a radio all would have been fatal, but curling tongs were below their fatal threshold, which was 6mA directly through the heart.

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Someone Electro

I sean that one.

They also put salt in.Then the curent was 1A.

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JLBShock

This topic looks weird for people tell them how it work when it start charged. Water and electronic can kill you. :twisted:

mechie

For my two pence worth -
If the lamp filament were to survive despite the glass envelope being broken ?

Think of it this way - there is a live wire supplying 240v (or whatever) and a neutral wire, effectively connected to ground (A Dangerous Assumption!), this power supply is running a desk lamp, either submerged in your bath or on top of next-door's television, it makes no difference! the local substation will happily power this lamp AND run a couple of amps through the bathwater to the earthed pipework - in fact it won't notice the combined load !

In my mind water and electricity DONT mix - the water disappears as hydrogen and oxygen (electrolysis !)

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