Slv

[D Skelton]

What would be the disadvantages of using a SLV system to power a domestic installation? By SLV I mean the supply authority providing electricity as per normal, but with an inductor placed between the cut-out and meter to seperate the circuits. There would be a much greater reduction in the risk of shock in the sense that you could touch exposed live parts with little to no danger of electrocution. There would also be no need to earth or provide RCD protection.

 

[Deleted member 26818]

The requirements for earthing and RCD protection would still apply.

 

[D Skelton]

I'm not talking about the requirements for earthing, Imagine they don't exist. I'm talking theoretically.

 

[Deleted member 26818]

I suppose then that the main disadvantage would be the lack of appliances that could be connected to such a system.
When electricity was first distributed, there were no appliances, only lighting. Electrical lighting was marketed as being cleaner, safer and more modern than it's rival gas.
Once distribution became more wide spread, people started producing appliances, which at first could only be plugged into lighting sockets.
As appliances became more widespread power circuits and socket-outlets were introduced.
What benefit would your hypothetical Separated electricity provide over normal electricity?
What would be the costs involved in switching over to it?
My belief is that the next big change in the electrical industry will be wireless distribution of energy using microwaves.

 

[D Skelton]

You could still connect appliances to it and the benefit would be that there would be no risk of electric shock if your body provided an earth path. That would mean that the cost to the consumer would be reduced in that you buy all your cables minus the earth as there would be no need to provide a CPC. The cost of switching over would just include an inductor where your supply comes in, and most importantly, consider the safety aspect of such a system! A huge reduction in the risk of electric shock!

 

[Deleted member 26818]

What voltage are you considering, and why do you believe CPCs would not be required?

 

[D Skelton]

230V to 230V. An inductor would work the same as a tranny only the voltage would stay the same, however the circuits would be seperate. The seperation would mean no need for a CPC as the electricity couldn't physically travel to earth from a seperated circuit.

 

[Deleted member 26818]

Such a system would produce 460V, you would have to do as they do in America and use 110V to 110V to produce 220V.
At the moment the Regulations require a CPC for such a system.

 

[D Skelton]

How would it? An inductor with an equal amount of coils on each side would induce 230V through it. The voltage would only step up if the amount of coils was stepped up in the secondary winding. Faraday's law of induction. And like I said, the regs don't come into this as it's only theoretical.

 

[grantr37]

I used to have an old vaccum cleaner in the loft that had been there for probably over 60 years where I used to live, put in skip but noticed that the thing had a lamp bayonet connector on it.... I have also been in an old sandstone building only last year in Glasgow that had obviously lain empty and only been used for storage since the second world war, it was complete with very old wallpaper, old bakealite switches and I came accross a lamp socket and switch about 3 feet off the floor, which I assume was used as one of the earliest Electrical power sockets back when you had a lamp, a heavy early electric iron and some kind of early vaccum cleaner and had to take your radio battery into town to get it charged up, it was mounted on a square wooden plate and had brass fittings and an early bakealite switch.......old stuff in old buildings and disused factories etc fascinates me, I like to look at the old manufacturers plates they had stuck on them with rivets....I have seen some old 1940's and 1950's bench drills and presses in use in metal workshops in the last few years...

 

[D Skelton]

erm, ok