water and electricity don't mix? - Page 2 - Electronic Circuits Projects Diagrams Free

kazakhan · 22nd October 2005, 04:01 AM

Quote:

Originally Posted by instruite

See the following website
http://www.school-for-champions.com/...k.cfm?topic=AC
check the reply for the question titled "AC versus DC when holding the wire"

Are you calling me a liar? Whilst it may generally be the case it's obvious from my circumstances it is not the rule. Also the answer you've pointed to is quite poor which follows :-
Yes. It has to do with how the electricity causes the muscles to contract. DC causes muscles to tighten up, because the current it in one direction.
From this answer you could assume that AC will cause the muscles to loosen. Obviously that is not the case. How about the fact that AC is alternating, the contracted muscles actually get a chance to un-contract which they do leading to the throwing effect depending on the posture\position of the person. In the case where I got stuck to the wall socket I was sitting legs crossed, I was shaking quite rapidly(50Hz :lol

and I couldn't breathe or move whilst being shocked. Of course with DC the muscles have little chance of un-contracting and hence the sticking.

Quote:

Originally Posted by zachtheterrible

but the electricity wouldn't get to the brain unless your head was grounded.

I wouldn't test that idea if I were you :shock:

zachtheterrible · 22nd October 2005, 04:30 AM

Quote:

I wouldn't test that idea if I were you

Neither would I. that's why I leave it a theory :lol:

akg · 22nd October 2005, 07:59 AM

Quote:

Isn't the human body (and other animals) something like 65-70% water?.

yes ofcource.. not only water ..but also containing high conductivity salts

[/quote]

akg · 22nd October 2005, 08:07 AM

Quote:

Doesen't our brain have something inside it that conducts electricity?

yes .. our brain should have 'something' inside

Someone Electro · 22nd October 2005, 09:28 AM

Well probobly only the nerves are stimulated.

If a neve cell is stimulated it will triger the next one and that the next and the next one... Thay way transporting some singnal.The nerve cells in out brain work simalar to logic gates they proces an signal.And afuly a lot of them make a brain.

A salt can make water an amazingly good conductor.

Electricety kills becose that shock makes the nerve cells control the hart wrong or becose it frys your body.(Depends on where and how you get shocked.)

akg · 22nd October 2005, 10:17 AM

is it that electricity affecting nerve cells causes the problem..or that it affects the muscle? in the case of ac causing uncontrollable muscle movements and spasm? i think electricity affecting the muscle decides ur fate . (dc sticks u and ac flies u apart) ..what abt others ?

madmikejt12 · 22nd October 2005, 10:43 AM

i thaught electricity affected the nerves (sending impulses) which caused muscles to contract and go wild.
And i also thaught that if you were grounded, the electricity would pass through you but it wouldnt be life threatening :?: :?:

Someone Electro · 22nd October 2005, 10:52 AM

You must prevent any electricety to run trough you by not toching anything grounded. So if you wod float in air you cod toch the mains whithout geting shocked but if you toch the L and N or ground you wod get shocked.

**Nigel Goodwin** · 22nd October 2005, 10:53 AM

Quote:

Originally Posted by madmikejt12

i thaught electricity affected the nerves (sending impulses) which caused muscles to contract and go wild.
And i also thaught that if you were grounded, the electricity would pass through you but it wouldnt be life threatening :?: :?:

You don't want electricity to 'pass through you' - there are essentially two modes of mains electrocution.

1) From live to neutral - BOTH wires connected to your body (say between hands?).

2) From live to ground - ONLY live connected to your body, the neutral connection is then via your body through the ground (because neutral is grounded at the sub-station).

Either can kill you - or even if the shock doesn't kill you, it might cause you to fall and break your neck :lol:

Most household electrocutions are probably the second type?, where you are shocked via the ground.

Someone Electro · 22nd October 2005, 11:00 AM

Like it wod be stupid to hold on the neutral wire while working. :lol:

It shod shock you even more if you toch it directly becose there is less resistance in the path.

A long time back a school mate was fooling whith an mains plug in school. I told him not to do it.He sead that he can only get shocked if he toches bouth wires(L and N).The mains then proved to him his wrong and got a good shock.LOL :lol:

Dont wory he is still alive.He just jumpled and his finger was just red and hurt for about 1 hour.

audioguru · 22nd October 2005, 03:13 PM

Guys working on live high-voltage wires are in a well-insulated hoist, and they get a huge arc when approaching the live wire. The other side of the connection is their capacitance to ground.

You can hold a long florescent tube up beneath high-voltage wires and it will light a little. Its upper contact makes a capacitive voltage divider to ground. If you are grounded you will feel a very small current. :lol:

danielsmusic · 30th October 2005, 06:39 PM

thanks for the replys, iv bin on holiday, that is why i didn't post for a while.
i have had two mains electric shocks one through my finger and one through my body (hand to hand). i am still here, just luck was on my side. i always touch electrical stuff with wet hands and recently, i touched a bare live wire with 240v ac in it and didnt even tingle. so mabe alot of people are unlucky and electricity kills or burns them, and some pleople are lucky like me. back to the water though. for example if i was in a saltwater swimming pool and dropped a live desklamp in it, what would happen :?:

Someone Electro · 30th October 2005, 06:48 PM

If you thoched the neutral wire notng will hapend.Becose neutral is the same as the gound wire and the ground wire is the same as the ground your standing on.

So only thong the live will shock you.

salt water.Mithbusters testes that and meshured 1A of curent trough the dummys heart!So it wod lireraly fry you.

danielsmusic · 30th October 2005, 06:57 PM

i think i seen that one, was the one when they were testing what would happen when a bolt of lighting hit your house and they built a little house for buster ... he was in the shower and i think it broke the multimeter :lol:

**Nigel Goodwin** · 30th October 2005, 07:01 PM

Quote:

Originally Posted by danielsmusic

i have had two mains electric shocks one through my finger and one through my body (hand to hand). i am still here, just luck was on my side. i always touch electrical stuff with wet hands and recently, i touched a bare live wire with 240v ac in it and didnt even tingle. so mabe alot of people are unlucky and electricity kills or burns them, and some pleople are lucky like me.

You have to be really unlucky (or determined) for 240V to kill you, but a number of people manage it every year!.

An old friend of mine committed suicide many years ago, he was a BT Engineer. He replaced the fuses in the fuse box with nails, got an extension lead (and replaced the plug fuse with a nail), and ran the lead into the bathroom. He then got another plug (with another nail as fuse) and fitted wires from the plug to both wrists and ankles.

He then sat in a bath of water, and plugged himself in to the extention lead :cry:

As usual, it was over a woman - his wife, and a well known 'slapper'.

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22nd October 2005, 09:28 AM	(permalink)
Someone Electro	Well probobly only the nerves are stimulated. If a neve cell is stimulated it will triger the next one and that the next and the next one... Thay way transporting some singnal.The nerve cells in out brain work simalar to logic gates they proces an signal.And afuly a lot of them make a brain. A salt can make water an amazingly good conductor. Electricety kills becose that shock makes the nerve cells control the hart wrong or becose it frys your body.(Depends on where and how you get shocked.) __________________ Il give you shocking experience.

22nd October 2005, 10:17 AM	(permalink)
akg	is it that electricity affecting nerve cells causes the problem..or that it affects the muscle? in the case of ac causing uncontrollable muscle movements and spasm? i think electricity affecting the muscle decides ur fate . (dc sticks u and ac flies u apart) ..what abt others ?

22nd October 2005, 10:43 AM	(permalink)
madmikejt12	i thaught electricity affected the nerves (sending impulses) which caused muscles to contract and go wild. And i also thaught that if you were grounded, the electricity would pass through you but it wouldnt be life threatening :?: :?:

22nd October 2005, 10:52 AM	(permalink)
Someone Electro	You must prevent any electricety to run trough you by not toching anything grounded. So if you wod float in air you cod toch the mains whithout geting shocked but if you toch the L and N or ground you wod get shocked. __________________ Il give you shocking experience.

22nd October 2005, 11:00 AM	(permalink)
Someone Electro	Like it wod be stupid to hold on the neutral wire while working. :lol: It shod shock you even more if you toch it directly becose there is less resistance in the path. A long time back a school mate was fooling whith an mains plug in school. I told him not to do it.He sead that he can only get shocked if he toches bouth wires(L and N).The mains then proved to him his wrong and got a good shock.LOL :lol: Dont wory he is still alive.He just jumpled and his finger was just red and hurt for about 1 hour. __________________ Il give you shocking experience.

22nd October 2005, 03:13 PM	(permalink)
audioguru	Guys working on live high-voltage wires are in a well-insulated hoist, and they get a huge arc when approaching the live wire. The other side of the connection is their capacitance to ground. You can hold a long florescent tube up beneath high-voltage wires and it will light a little. Its upper contact makes a capacitive voltage divider to ground. If you are grounded you will feel a very small current. :lol: __________________ Uncle $crooge

30th October 2005, 06:39 PM	(permalink)
danielsmusic	thanks for the replys, iv bin on holiday, that is why i didn't post for a while. i have had two mains electric shocks one through my finger and one through my body (hand to hand). i am still here, just luck was on my side. i always touch electrical stuff with wet hands and recently, i touched a bare live wire with 240v ac in it and didnt even tingle. so mabe alot of people are unlucky and electricity kills or burns them, and some pleople are lucky like me. back to the water though. for example if i was in a saltwater swimming pool and dropped a live desklamp in it, what would happen :?: __________________ when you post that reply, im just kidding.

30th October 2005, 06:48 PM	(permalink)
Someone Electro	If you thoched the neutral wire notng will hapend.Becose neutral is the same as the gound wire and the ground wire is the same as the ground your standing on. So only thong the live will shock you. salt water.Mithbusters testes that and meshured 1A of curent trough the dummys heart!So it wod lireraly fry you. __________________ Il give you shocking experience.

30th October 2005, 06:57 PM	(permalink)
danielsmusic	i think i seen that one, was the one when they were testing what would happen when a bolt of lighting hit your house and they built a little house for buster ... he was in the shower and i think it broke the multimeter :lol: __________________ when you post that reply, im just kidding.