Re: Ring main question

["Alancc" <alan.cc@xxxxxxx>]

Well thats confused the weekend electricians even more.

Alancc

----- Original Message -----
From: Paul Helliwell <g0kao@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, March 15, 2002 7:50 PM
Subject: Fw: [ukha_d] Ring main question


> DO NOT USE A BUZZER for this testing. You may get false readings due
to
> partial short circuits that may exist in the circuit.
>
> I am a Qualified Electrician and the only safe way to test this out
properly
> is with the use of an insulation tester. This generates a approx 500
volts
> so ENSURE THAT ALL PLUGS REMOVED FROM SOCKETS otherwise appliance may
get
> damaged and you may also get false readings. There is another tester
which
> is used to test Earth Loop Impedance and again all appliances should
be
> removed from sockets.
>
> If you are still not sure then I strongly recommend that you find a
suitably
> qualified electrician to check it out properly. Most good electricians
are
> registered with the Joint Industry Board for the Electrical
Contracting
> Industry and may also be registered withe the NICEIC which is an
Inspection
> authority that inspects work carried out by Electricians. If you can
find
> one by recommendation that is even better.
>
> Sorry for the long post guys but I feel that where electrics are
concerned
> it should be done properly.
>
> Paul H
>
>
> ----- Original Message -----
> From: "James, Daniel" <daniel.james@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Monday, March 11, 2002 10:54 AM
> Subject: RE: [ukha_d] Ring main question
>
>
> > >So it seems that the ring main is feed by two fuses, one in
each
> > > direction.
> >
> > I had this problem in a previous property.
> >
> > You should have 4 live wires returned to the fuse box.... from
the two
> rings
> >
> > It could be that the two rings have been crossed at the fuse box,
it is
a
> > easy thing to test and fix, but will involve taking the power
down for
an
> > hour or so.
> >
> > 1, Switch off the power to the house.
> > 2, Note where the cables are wired to .
> > 3, Disconnect the 4 live connectors from the fuses, and ENSURE
THEY ARE
> NOT
> > LIVE. (Hence turning off the master fuse in the box, not just the
two
> > rings..)
> > 4, take a mulitmeter / continuity tester and attach it to one of
the 4
red
> > cables, and touch the other end of the multimeter to one of the
other 3
> > cables, use this to see if the rings are crossed, - you should be
able
to
> > find the other end of the ring, as it is the one that sounds the
> continuity
> > buzzer!) - test this for all 3 cables, if the buzzer sounds then
you
have
> a
> > problem further down the system
> > 5, label these as a pair, and replace onto one of the fuses.
> > 6, buy virtue the other 2 cables should be the other ring, but
double
> check
> > this!!
> > 7, wire the fuse box back up, and then test the two circuits
> independently,
> > with a light plugged in to the various sockets, (some houses have
an
> > upstairs and downstairs ring, others have front back...)
> >
> > 8, label the fuses.
> >
> > If this does not work, then you have a problem elsewhere in the
house,
put
> > the cabling back as you found it in 2, above, and rethink :-)
> >
> > HTH
> >
> > Daniel
> >
> >
> > -----Original Message-----
> > From: Robert Chasmer [mailto:robert.chasmer@xxxxxxx]
> > Sent: 11 March 2002 10:45
> > To: 'ukha_d@xxxxxxx'
> > Subject: RE: [ukha_d] Ring main question
> >
> >
> > > "Robert Chasmer" <robert.chasmer@xxxxxxx>
wrote:
> > > > So it seems that the ring main is feed by two fuses,
one in each
> > > > direction.
> >
> > Paul Helliwell [mailto:g0kao@xxxxxxx] wrote:
> > > Basically Twin+E usually 2.5mm squared (carnt do symbol for
squared)
> > > starts at one fuse in fuse box and then goes to each socket
in turn
> > > and then from the last socket back to the same fuse in the
fusebox.
> > >
> > > For IEE wiring regulations try http://www.iee.org/Publish/WireRegs/
> > > lots of info can be obtained.
> >
> > Thanks for the info, I was pretty sure it wasnt't wired
correctly.
> > I'm not sure if its just the fuse box that is wired wrongly on
some
> > dogey join between two rings.  I guess I can check if two wires
are
> > terminating in each fuse.
> >
> > I've had a look on that site, and it seems they want money for
most of
> > the PDFs.  I'm going to see if I can find more info elsewhere.
> >
> >
> > David Buckley [mailto:db@xxxxxxx] wrote:
> > > Very bad
> > > Presumably 2 x 32A breakers feeding a common ring, massive
overload
> > > potential, fires etc.
> > > Expert advice needed.
> >
> > Worrying.  Are you saying that the ring is less likely to trip
because
> > of the two fuses, So then the cables become overloaded and start
to
> > burn? I'll let my mate know that he *SHOULD* invest in a good
leccky
> > to get this sorted.
> >
> > I saw a tv program a few weeks ago, about various dodgey so
called
> > electrical engineers.  For the sting they'd setup loads of
cameras
> > in the house and then just swapped two fuses over in the box. 
One
> > of the engineers decided to put a lighter to the fuses, making
them
> > look all burned to scare the owner that her house could catch
fire
> > unless she paid him for lots of money to fix it.
> >
> > Hopefully he'll be able to find someone he knows to do the work.
> >
> > Thanks for your help
>


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