Re: Ring main question

["David Buckley" <db@xxxxxxx>]

very bad

Presumably 2 x 32A breakers feeding a common ring, massive overload
potential, fires etc.

Expert advice needed.



----- Original Message -----
From: "Robert Chasmer" <robert.chasmer@xxxxxxx>
Newsgroups: tex.com.ml.ukha_d
Sent: 07 March 2002 12:42
Subject: [ukha_d] 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 ---+
>
> 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
>
> This email and any files transmitted with it are confidential and
intended
> solely for the use of the individual or entity to whom they are
addressed.
> If you have received this email in error please let us know by e-mail
reply
> and delete it from your system; you may not copy this message or
disclose
> its contents to anyone.  Please note that any views or opinions
presented
in
> this email are solely those of the author and do not necessarily
represent
> those of MMT Computing plc.  Finally, the recipient should check this
email
> and any attachments for the presence of viruses.  MMT Computing plc
accepts
> no liability for any damage caused by any virus transmitted by this
email.
>
> For more information: http://www.automatedhome.co.uk
> Post message: ukha_d@xxxxxxx
> Subscribe:  ukha_d-subscribe@xxxxxxx
> Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
> List owner:  ukha_d-owner@xxxxxxx
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>