Ring main question - Attempt 2

[Robert Chasmer <robert.chasmer@xxxxxxx>]

Sorry guys, my last posting seems to have got lost by Yahoo.  This is my
complete posting.  Maybe its me going mad...

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/ /  /_/ / /__/ / / /__/ / / /__    http://www.kaosuk.co.uk/
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/ /__/ / / /  / / / /  / / _____/ / Rob Chasmer, MMT Computing
______/ _/  /_/ _/  /_/ ______/ robert.chasmer@xxxxxxx

-----Original Message-----
From: Robert Chasmer
Sent: 07 March 2002 12:43
To: Home Automation List (E-mail)
Subject: Ring main question


Hi, I wonder if anyone on the list could give me some advice on the
following.

I was helping a friend at the weekend move some mains sockets and add an
addional one.  Originally he intended to simply create spurs of the
existing
sockets, but I persuaded him to extend the current ring main instead.

As we began work, I started off my turning of the mains at his fuse box. 
He
has a number of tripswitch fuses marked as the following:-
1 x Cooker
1 x Upstairs lighting
1 x Downstarirs lighting
2 x Sockets

Now as there were two fuses marked sockets I expected one to be for the
upstairs ring, and one for the downstairs ring.  The girls we watching
telly
in the lounge so I promply tripped one of the socket fuses.  ...Telly still
On...  Ok so reset that fuse back on and trip the other fuse.  ...Telly
still on...  Ok trip both fuses... Telly goes off.

So it seems that the ring main is feed by two fuses, one in each direction.

MAINS

+--- Socket 8 ------ Fuse --+-- Fuse ------ Socket 1 ---+

Socket 7                                                Socket 2

+--- Socket 6 --- Socket 5 --- Socket 4 --- Socket 3 ---+

Is this normal, my ring at home certainly isn't like this of is this
something to worry about.  Another thought I had was that there are two
seperate rings but someone has managed to join the two together.

How is a normal ring main fused, does each direction of the ring simply
terminate into the same fuse like a socket?

--
______   __   _   ______   ______
/ ___   / /  /  / __    / _____ HOME: chas@xxxxxxx
/ /  /_/ / /__/ / / /__/ / / /__    http://www.kaosuk.co.uk/
/ /  __  / ___  / / ___  /  \__  \            ----
/ /__/ / / /  / / / /  / / _____/ / Rob Chasmer, MMT Computing
______/ _/  /_/ _/  /_/ ______/ robert.chasmer@xxxxxxx

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