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Earths can be dangerous

Thanks for confirming you know nothing about car audio either.

Reply to
Dave Plowman (News)
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The drum isn't an electrical part, it's the motor that needs to be insulated.

By metal that's nowhere near the electrics.

The tool maybe, but the wire when you're hedge trimming tends to dangle under it. You can't change the law of gravity.

Reply to
Jimmy Wilkinson Knife

Er.... I wrote that below.

Well your fictitious example requires you to have wet hands and miraculously become a flat 0.5m^2 plate. So you can take a large amount off that 150mA.

Reply to
Jimmy Wilkinson Knife

Prick.

Reply to
Mr Pounder Esquire

Prick.

Reply to
Mr Pounder Esquire

This - is the fallibility of your argument.

You have a balanced isolated supply but in the real world electrical equipment can and does develop faults. A cooker can develop a leakage in an element to the framework of the cooker an immersion heater can develop a leak from the heating element to the metal case of the unit thence to the metal hot water tank. A washing machine can do the same with its heating element and it can also leak water into the motor thus in doing so the assumed balanced isolated supply is no more, you are back unknowingly to the current setup with the live and neutral system.

Or an unknown variant of the same, consider that if one unit were to leak to earth on one side of the supply one on the other how would you detect the current flowing away to waste there?

However if you have the established system you know that one side is in earthed and you can prevent all manner of accidental electrocution with a rather simple device a Residual Current Breaker this one device has done more to prevent electrocution than any other:)

To do this isolated supply would mean rewiring the UK. New transformers would be needed and the space to put them. Do bear in mind that some residential accommodation like flats might not have the space if you put them outside then you'd be doing a lot of road digging and overhead wiring for what real benefit?.

Let alone the removing of all the metal water pipes in the country. Also do bear in mind that not everyone is your electrically resistive self people do have wet bodies in showers, children may not be quite so hardy either.

Think through the wider real world issues then you'll realise there isn't an argument for what you propose.!

Reply to
tony sayer

No. If my washing machine was fed from an isolated supply, and developed a leak to it's chassis, there would be one leg of an isolated transformer output on the chassis, with nowhere to go if I touched it, so completely safe.

Now you're considering two broken appliances, you're really pessimistic.

We used to manage with just fuses.

Why would the isolated transformers be larger?

Just don't put them in in new installations. I'm not asking for everyone to suddenly become isolated by next week.

Bullshit. Everyone is pretty much the same, save for a few with dodgy tickers.

Reply to
Jimmy Wilkinson Knife

Yes except that there are likely to be other appliances that can develop leakage such as cookers, immersion heaters , kettles , electric irons water heaters..

Yes maybe but it can and does happen over time but the danger is you wouldn't know its happened with a floating supply. With a live neutral system it does come to notice rather quickly and the fault is noted and rectified..

Yes we did manage but then again the human body currents are much less then what a fuse can sort out..

They'd be many many more of them!. The current 3 phase distribution system can and does supply many properties with a floating supply to each property may more individual transformers are needed. Who is going to pay and to what real benefit?.

And thats -- the reason why your not in charge of the electricity supply in the country!...

Reply to
tony sayer

Very unlikely you have two problems at once. I've never actually encountered a single device with a leak to the chassis.

You'd still feel a tingle when you touched it.

And yet we're all alive.

Why does removing the link from one leg to earth, mean more transformers?

What's the reason? Because I don't think the whole world should tread on eggshells for the few that are both stupid and have dodgy hearts?

Reply to
Jimmy Wilkinson Knife

Do you think anybody is going to wade through all of the crap to find out if you ever write anything worth reading?

Reply to
Terry Casey

Clearly whoever you're replying to (as you didn't bother to quote their name), and the other person or people they were talking to didn't mind. You're on your own mate.

Reply to
Jimmy Wilkinson Knife

That's what the RCD will cope with..

Some are - some are not;(..

Suggest you read up on power distribution in the UK..

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Reply to
tony sayer

It doesn't need to. No path to earth, not enough to kill you.

Survival of the fittest. I've had many shocks through me at 240V and just jumped. For example the last one I had, I was mowing the lawn and the cable of the mower was damaged, I grabbed it and touched the bare live wire while my bare feet were on the lawn. I shouted abusive words and let go. No harm done except my religious neighbour objected to my blasphemy.

So you don't know then, thought so.

My local substation has three phases and ground. Just disconnect that ground from ground, job done. Instead of me getting ground and 240V, I'd get a floating 240V pair, neither of which would hurt me if I touched it and the ground.

Reply to
Jimmy Wilkinson Knife

sounds like he'll get several more. Darwin will prevail.

Reply to
tabbypurr

I can see that the only way to silence you would be for you to try it out.

Reply to
Max Demian

Invalid assumption that electricity usually kills people.

Reply to
Jimmy Wilkinson Knife

I know what a floating voltage is, clearly you don't.

Reply to
Jimmy Wilkinson Knife

I'm not aware of anyone making that assumption here. Not even worth explaining it to you I think.

NT

Reply to
tabbypurr

Just up there you reckoned Darwin would kill me with electricity. Please take note of your own posts.

Reply to
Jimmy Wilkinson Knife

Forums can be a great place to ask questions and share sensible ideas with others. However I don't think it's appropriate for you to come on here tell ing everyone about your complete disregard for the law, and for the safety of you and anyone living in your home, and suggest it is a good idea.

Never has the term "knowing enough to be dangerous" been so apt.

Reply to
jonny.a.wright

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