Hi. I want to run some satellite cable (PF100 from TLC) from the outside,
through a wall, into the house. The spec' says the cable's minimum bending
radius is 60mm.

The cable will be shaped to make a (large radius) drip loop on the wall just
before it enters the house.. My problem is how then to get the cable into
the wall without bending it at sharp right angle.

The only way I can think of is to cut a deep channel into the wall. The
channel would have to have a minimum length and minimum depth of 60mm+plus
the radius or diameter of the cable - so about 70mm long and 70mm deep at
least..

The cable would enter on one side of the channel, parallel to the wall, bend
90deg in the channel and leave the channel perpendicular to the wall.
(Fortunately the cable will then be under the floorboards, so its direction
on exit doesn't matter.)

Does anyone know of other ways of getting the cable through while not
overbending?

Cheers

Steve

Steve wrote:

Does anyone know of other ways of getting the cable through while not
overbending?

Drill the hole at an angle (sloping down to the outside unless you like
damp carpet).

"Andy Burns" wrote in message
et...
Steve wrote:

Does anyone know of other ways of getting the cable through while not
overbending?

Drill the hole at an angle (sloping down to the outside unless you like
damp carpet).

Thanks Andy, but even, say, a 45deg angle would give a sharp-ish kink
wouldn't it? I've read that tight bends and kinks must be avoided as they
can cause a signal reflection which reduces the signal passed to the
receiver.

However, you've given me an idea for improving my 'slot approach'- the slot
can be shallow at one end and deep at the other, which saves
drilling/chiselling.

Cheers

On Wed, 21 Jan 2009 16:39:44 -0000, Steve wrote:

"Andy Burns" wrote in message
et...
Steve wrote:

Does anyone know of other ways of getting the cable through while not
overbending?

Drill the hole at an angle (sloping down to the outside unless you like
damp carpet).

Thanks Andy, but even, say, a 45deg angle would give a sharp-ish kink
wouldn't it? I've read that tight bends and kinks must be avoided as they
can cause a signal reflection which reduces the signal passed to the
receiver.

If you bring the cable down about a foot from the hole, then loop the cable
around to enter the hole, the radius will be quite large so you shouldn't
have any problems with kinks etc.
Same if you want a cable to go around a 90degree corner: start a loop a distance
out, then ust "twist" it around the corner and straighten up the loop on
the other side.

There's also a lot of myths and legends about satellite cable. Unless you
have a marginal signal, a dB or two loss from sharp bends (even if a bend
*does* produce a measurable drop, anyone actually measured it?) probably
won't hurt the reception.

"Paul Matthews" wrote in message
...
Steve wrote:

Thanks Andy, but even, say, a 45deg angle would give a sharp-ish kink
wouldn't it?

If you drill inside outwards, the blowout should smooth the radius as
well.

Good idea Paul. Also, I could deliberately enlarge the blowout a bit to
provide a more turning space.

On Wed, 21 Jan 2009 15:44:42 -0000, Steve wrote:

-------------------8
Does anyone know of other ways of getting the cable through while not
overbending?

I took the cable through an airbrick below floor level, then up through the
floor into the lounge (which is presumably similar to your intention). The
radius of the bend where the cable enters the house is taken care of by
allowing the cable to loop away from the wall immediately before passing
through the aperture. That might be a bit of a vulnerability in some
situations, but not in ours.

"Appelation Controlee" wrote in message
...
On Wed, 21 Jan 2009 15:44:42 -0000, Steve wrote:

-------------------8
Does anyone know of other ways of getting the cable through while not
overbending?

I took the cable through an airbrick below floor level, then up through
the
floor into the lounge (which is presumably similar to your intention). The
radius of the bend where the cable enters the house is taken care of by
allowing the cable to loop away from the wall immediately before passing
through the aperture. That might be a bit of a vulnerability in some
situations, but not in ours.
Thanks. Unfortunately I'd be uncomfortable allowing the cable to loop away
from the wall because the area is accessible (eg kids) and I don't want to
create a hazard.

On Jan 21, 9:09*pm, "Steve" wrote:
"Appelation Controlee" wrote in message

... On Wed, 21 Jan 2009 15:44:42 -0000, Steve wrote:

-------------------8
Does anyone know of other ways of getting the cable through while not
overbending?

I took the cable through an airbrick below floor level, then up through
the
floor into the lounge (which is presumably similar to your intention). The
radius of the bend where the cable enters the house is taken care of by
allowing the cable to loop away from the wall immediately before passing
through the aperture. That might be a bit of a vulnerability in some
situations, but not in ours.

Thanks. Unfortunately I'd be uncomfortable allowing the cable to loop away
from the wall because the area is accessible (eg kids) and I don't want to
create a hazard.

You could mount a little box over it.

Robert

Steve expressed precisely :
The only way I can think of is to cut a deep channel into the wall. The
channel would have to have a minimum length and minimum depth of 60mm+plus
the radius or diameter of the cable - so about 70mm long and 70mm deep at
least..

Go down, back up and allow it to come out away from the wall to form
some of the radius plus a small amount as it enters the hole in the
wall. Another way would be to make the hole in the horizontal brick
seam, but with a vertical seam directly below the hole - so you can
chase out some of the mortar in the vertical seam, always supposing the
mortar seams are wide enough for the cable.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

Steve wrote:
Hi. I want to run some satellite cable (PF100 from TLC) from the outside,
through a wall, into the house. The spec' says the cable's minimum bending
radius is 60mm.

The cable will be shaped to make a (large radius) drip loop on the wall just
before it enters the house.. My problem is how then to get the cable into
the wall without bending it at sharp right angle.

The only way I can think of is to cut a deep channel into the wall. The
channel would have to have a minimum length and minimum depth of 60mm+plus
the radius or diameter of the cable - so about 70mm long and 70mm deep at
least..

The cable would enter on one side of the channel, parallel to the wall, bend
90deg in the channel and leave the channel perpendicular to the wall.
(Fortunately the cable will then be under the floorboards, so its direction
on exit doesn't matter.)

Does anyone know of other ways of getting the cable through while not
overbending?

Cheers

Steve



A while ago we tried a Freeview aerial (it was fitted then removed,
without payment, as it did not work well enough). The satellite cable
they used was left behind. What had been pushed through the wall was
dreadfully damage by its treatment. The copper sheath was severely
cracked. Can't prove it was done by bending through the wall (though
that was too tight a radius), but I saw brand new cable coming off the
reel and saw nothing else that I could blame.

(Yes - it really was brand new from the reel. They left that as well.
That cable was in perfect condition.)

So I too was wondering how to get a cable through without damage -
either at time of fitting or afterwards. Decided the only answer was the
type of thing you are talking about.

--
Rod

Hypothyroidism is a seriously debilitating condition with an insidious
onset.
Although common it frequently goes undiagnosed.
www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember Rod saying
something like:


So I too was wondering how to get a cable through without damage -
either at time of fitting or afterwards. Decided the only answer was the
type of thing you are talking about.

Pex pipe.

"Steve" wrote in message
...
Hi. I want to run some satellite cable (PF100 from TLC) from the outside,
through a wall, into the house. The spec' says the cable's minimum
bending radius is 60mm.



You can get away with bending the cable more tightly than that. I have a
loop inside a normal square electical metal countersuck wall box.

You could use a rounded piece of wood on the outside of the wall if you are
that concerned. Also try uk.tech.digital-tv


--
Michael Chare

"Steve" wrote in message
...
Hi. I want to run some satellite cable (PF100 from TLC) from the outside,
through a wall, into the house. The spec' says the cable's minimum
bending radius is 60mm.

The cable will be shaped to make a (large radius) drip loop on the wall
just before it enters the house.. My problem is how then to get the cable
into the wall without bending it at sharp right angle.

The only way I can think of is to cut a deep channel into the wall. The
channel would have to have a minimum length and minimum depth of 60mm+plus
the radius or diameter of the cable - so about 70mm long and 70mm deep at
least..

The cable would enter on one side of the channel, parallel to the wall,
bend 90deg in the channel and leave the channel perpendicular to the wall.
(Fortunately the cable will then be under the floorboards, so its
direction on exit doesn't matter.)

Does anyone know of other ways of getting the cable through while not
overbending?

Cheers

Steve

Thanks everyone. I've ended up using a deep-ish slot leading to an upwardly
sloping hole. Cheers.