Cables in the tunnels
 

*Stupid question* Just wondering what they're for, normally one side has a
load of cables going along with two metal wires at the top and the other has
big fat cables.

Thanks

Fossil

Cables in the tunnels
 

"Fossil" wrote in message
...
*Stupid question* Just wondering what they're for, normally one side has a
load of cables going along with two metal wires at the top and the other
has
big fat cables.


Signalling, telecoms, power supply distribution.

Cables in the tunnels
 

On Thu, 26 Feb 2004 00:49:00 +0000 (UTC), "Cast_Iron"
wrote:


"Fossil" wrote in message
...
*Stupid question* Just wondering what they're for, normally one side has a
load of cables going along with two metal wires at the top and the other
has
big fat cables.


Signalling, telecoms, power supply distribution.

One of the problems at Camden Town was that nobody knew, it seems!
--
Peter Lawrence

Cables in the tunnels
 

Peter Lawrence wrote:
On Thu, 26 Feb 2004 00:49:00 +0000 (UTC), "Cast_Iron"
wrote:


"Fossil" wrote in message
...
*Stupid question* Just wondering what they're for, normally one
side has a load of cables going along with two metal wires at the
top and the other has big fat cables.


Signalling, telecoms, power supply distribution.

One of the problems at Camden Town was that nobody knew, it seems!

Knowing what a cable carries and its start and finish points are different.

Cables in the tunnels
 

On Thu, 26 Feb 2004 10:35:18 +0000 (UTC), "Cast_Iron"
wrote:

Peter Lawrence wrote:
On Thu, 26 Feb 2004 00:49:00 +0000 (UTC), "Cast_Iron"
wrote:


"Fossil" wrote in message
...
*Stupid question* Just wondering what they're for, normally one
side has a load of cables going along with two metal wires at the
top and the other has big fat cables.


Signalling, telecoms, power supply distribution.

One of the problems at Camden Town was that nobody knew, it seems!

Knowing what a cable carries and its start and finish points are different.

I think that at after Camden everyone knew where those cables
finished. Where they started or what they were for was something else
entirely.

OK, I'll get my coat

Keith J Chesworth
www.unseenlondon.co.uk
www.blackpooltram.co.uk
www.happysnapper.com
www.boilerbill.com - main site
www.amerseyferry.co.uk

Cables in the tunnels
 

Keith J Chesworth wrote:
On Thu, 26 Feb 2004 10:35:18 +0000 (UTC), "Cast_Iron"
wrote:

Peter Lawrence wrote:
On Thu, 26 Feb 2004 00:49:00 +0000 (UTC), "Cast_Iron"
wrote:


"Fossil" wrote in message
...
*Stupid question* Just wondering what they're for, normally one
side has a load of cables going along with two metal wires at the
top and the other has big fat cables.


Signalling, telecoms, power supply distribution.

One of the problems at Camden Town was that nobody knew, it seems!

Knowing what a cable carries and its start and finish points are
different.

I think that at after Camden everyone knew where those cables
finished. Where they started or what they were for was something else
entirely.

OK, I'll get my coat

LOL but you do have a point.

Cables in the tunnels
 

In article ,
Fossil wrote:
*Stupid question* Just wondering what they're for, normally one side has a
load of cables going along with two metal wires at the top and the other has
big fat cables.

The two metal wires are the emergancy signal phone (it has a proper
name, which I forget). Basically, in the cab of the train is a
telephone headset, which the driver can clip on to these wires to
talk to the signalman. Handy if the radio isn't working on that
bit of the track.

It can also be used to turn off the electricty to the rails in that
part of the track - again, handy if there is a problem.

--
You dont have to be illiterate to use the Internet, but it help's.

Cables in the tunnels
 

: Cables in the tunnels
From: "Cast_Iron"

How do you think Curry gets to the Indian restaurants London?

Cables in the tunnels
 

Mike Bristow wrote:
In article ,
Fossil wrote:
*Stupid question* Just wondering what they're for, normally one side
has a load of cables going along with two metal wires at the top and
the other has big fat cables.

The two metal wires are the emergancy signal phone (it has a proper
name, which I forget).

It's called the Tunnel Telephone, it has nothing to do with the signalling.

Basically, in the cab of the train is a
telephone headset, which the driver can clip on to these wires to
talk to the signalman. Handy if the radio isn't working on that
bit of the track.

It can also be used to turn off the electricty to the rails in that
part of the track - again, handy if there is a problem.

Not "handy", it was designed that way. In use from the start of the electric
tube railways the Tunnel Telephone is the first option in the event of
needing traction current to be discharged. Pinching the wires together
causes them to short out and operates the cut-outs in the sub-station
Clipping the handset on then allows the driver to talk to the Line
Controller.

Don't forget that train radio is a very recent introduction and is
unreliable compared to a direct line telephone.

Cables in the tunnels
 

In article ,
(Fossil) wrote:

*Stupid question* Just wondering what they're for, normally one side
has a
load of cables going along with two metal wires at the top and the
other has
big fat cables.

Thanks

Fossil



Tunnel telephone wires & insulators photo temporarily uploaded to:

http://www.romilepa.pwp.blueyonder.c...emptt&cant.PDF

(the pipe below the wires is the air pipe)

together with a close-up photo of the white "cant" notice that often gets
commented on here.

Roger