Working on running network cables (not mains) down the garden to the
garage (12meters). Will be burying some of the pipe in concrete.
Something tough enough to avoid rodent damage and not the concentina
stuff. Where do the guys who lay cable TV cables get their piping from?

--
Adrian C

On Mon, 04 Jul 2005 21:08:10 +0100, Adrian C wrote:

Working on running network cables (not mains) down the garden to the
garage (12meters). Will be burying some of the pipe in concrete.
Something tough enough to avoid rodent damage and not the concentina
stuff. Where do the guys who lay cable TV cables get their piping from?

I'd use the blue plastic water pipe, the stuff NTL use is much less
strong. The 25mm stuff is dirt cheep, the bigger stuff is expensive.

Rick

On Mon, 04 Jul 2005 21:08:10 +0100, Adrian C wrote:

Working on running network cables (not mains) down the garden to the
garage (12meters). Will be burying some of the pipe in concrete.
Something tough enough to avoid rodent damage and not the concentina
stuff. Where do the guys who lay cable TV cables get their piping from?

Burdens in North Wales will get you the pipe you are asking for, many
builders merchants will get it as a specil in large rolls. Also land
drain with no holes might work, many places neer me can get this.

Rick

Rick wrote:
Where do the guys who lay cable TV cables get their piping from?

I'd use the blue plastic water pipe, the stuff NTL use is much less
strong. The 25mm stuff is dirt cheep, the bigger stuff is expensive.

Thanks for the tip on water pipe. Got some this morning from the
plumbers shop, seems OK for the task ahead :-)

--
Adrian C

"Adrian C" wrote in message
...
Working on running network cables (not mains) down the garden to the
garage (12meters). Will be burying some of the pipe in concrete. Something
tough enough to avoid rodent damage and not the concentina stuff. Where do
the guys who lay cable TV cables get their piping from?

--
Adrian C

Are you using anything for lightning protection?

Regards, Blew

David Blewitt wrote:
Are you using anything for lightning protection?

Nope. Should I be? It's all along the soil, some buried!

--
Adrian C

Are you using anything for lightning protection?

Nope. Should I be? It's all along the soil, some buried!

If there was a nearby lightning strike it may fry the entire network.
Probably not to much financial risk f their's only a couple of PC's, but if
you've got a lot, or expensive PC's you might want to consider it. There
are special lighting protection devices for both ends of the cable
(http://www.clickonit.com/product.php?product=85853&c) , most outside wiring
runs are in fiber. You might want to consider wireless, just take the risk
(preferably unplug both ends in a storm). I've only known of one incident,
though it did over £20,000 worth of damage.

BTW I'm not a profesional data cable installer, I'm an electrician who
occasionaly installs data so others on the NG might know better.

Regards, Blew

Are you using anything for lightning protection?


Thanks for the headsup. Yup, some of those protectors looks like a good
idea. I live close to some quite tall metal structures - the arch on top
of the new wembley stadium for one!

--
Adrian C

While on the subject, does anyone know if its possible to get green
(colour, not environmentally friendly) mdpe pipe. I need to lay some
under the lawn for bringing in cable TV - instead of the tortuous route
NTL installers thought acceptable - and since it will enter at the same
point as the existing water main I don't want any chance of confusion
so it seems sensible to use the right colour.

Andrew

"Andrew" wrote in message
ups.com...
While on the subject, does anyone know if its possible to get green
(colour, not environmentally friendly) mdpe pipe. I need to lay some
under the lawn for bringing in cable TV - instead of the tortuous route
NTL installers thought acceptable - and since it will enter at the same
point as the existing water main I don't want any chance of confusion
so it seems sensible to use the right colour.

Andrew

How about bright blue? Most wide diameter plastic water pipe is bright
blue. Would it stop the confusion?

BigWallop wrote:

"Andrew" wrote in message
ups.com...
While on the subject, does anyone know if its possible to get green
(colour, not environmentally friendly) mdpe pipe. I need to lay some
under the lawn for bringing in cable TV - instead of the tortuous route
NTL installers thought acceptable - and since it will enter at the same
point as the existing water main I don't want any chance of confusion
so it seems sensible to use the right colour.

Andrew

How about bright blue? Most wide diameter plastic water pipe is bright
blue. Would it stop the confusion?

The two generally available colours are blue (your "bright blue"
presumably) and black. The blue is for use underground and away from
light, the black is for above ground in the light. I'm not sure what
happens (if anything) if black is buried or blue is exposed to light.

--
Chris Green

On 13 Jul 2005 20:09:41 GMT,it is alleged that spake
thusly in uk.d-i-y:

BigWallop wrote:

"Andrew" wrote in message
ups.com...
While on the subject, does anyone know if its possible to get green
(colour, not environmentally friendly) mdpe pipe. I need to lay some
under the lawn for bringing in cable TV - instead of the tortuous route
NTL installers thought acceptable - and since it will enter at the same
point as the existing water main I don't want any chance of confusion
so it seems sensible to use the right colour.

Andrew

How about bright blue? Most wide diameter plastic water pipe is bright
blue. Would it stop the confusion?

The two generally available colours are blue (your "bright blue"
presumably) and black. The blue is for use underground and away from
light, the black is for above ground in the light. I'm not sure what
happens (if anything) if black is buried or blue is exposed to light.

Black is routinely buried (or was) before the blue became commonly
available, but like you, I know not if the blue is UV stabilized.

If it's going to be difficult (as it appears) to obtain the correct
colour, bands of green insulation tape would serve to identify it in
the 'in house' section where it enters, and possibly a sleeve of some
larger diameter pipe (maybe rainwater downpipe) in the buried section?
(At least near the water main).

--
Life is like a hot bath. It feels good while you're in it, but the
longer you stay in, the more wrinkled you get.
- Robbert Oustin

Andrew wrote:

While on the subject, does anyone know if its possible to get green
(colour, not environmentally friendly) mdpe pipe. I need to lay some
under the lawn for bringing in cable TV - instead of the tortuous route
NTL installers thought acceptable - and since it will enter at the same
point as the existing water main I don't want any chance of confusion
so it seems sensible to use the right colour.

Andrew

I've got 3 off 6m lengths of utility duct at work going begging, std
black, in Southampton.

On 13 Jul 2005 06:17:08 -0700, "Andrew"
wrote:

While on the subject, does anyone know if its possible to get green
(colour, not environmentally friendly) mdpe pipe. I need to lay some
under the lawn for bringing in cable TV - instead of the tortuous route
NTL installers thought acceptable - and since it will enter at the same
point as the existing water main I don't want any chance of confusion
so it seems sensible to use the right colour.

It might be worthwhile contacting any local civil engineering
contractor who does duct-laying for CATV companies in your area. I
shouldn't imagine that the original duct suppliers would be interested
in selling less than LARGE quantities of their piping to an
individual.

--
Frank Erskine
Sunderland

On Thu, 07 Jul 2005 02:50:40 +0100, Adrian C wrote:

David Blewitt wrote:
Are you using anything for lightning protection?

Nope. Should I be? It's all along the soil, some buried!

When lightning discharges to earth, depending on the resistivity of
the ground nearby there can be a severe voltage gradient in the soil.
If you have a long length of cable buried, the voltage across the two
ends may be perhaps several (or even many!) thousands of volts. Again
depending on the circuit configuration you can end up with lots of
volts /across/ the "pair".

I've had lots of experience of this on a VHF/UHF cable TV system, a
number of years ago. In spite of gas-discharge tubes fitted to trunk
amplifiers we lost loads of regulator ICs. As most of these amplifiers
were fitted underground it wasn't a very straightforward job having
these replaced in pi$$ing down rain while there are still storm
rumbles around and hundreds of people whingeing about their lack of TV
reception.

--
Frank Erskine
Sunderland