Using white coax cable outside
David Bolton
outside (due to UV effect)? I've got a big job starting next week where they
are insisting on using white cable externally.
I've always used black externally and I can't really get a definitive answer
to whether white (WF100) is OK these days.
Bill Wright
cables seem to be OK.
Don't forget to take your white cable clips.
Bill
Dave Plowman (News)
--
*Succeed, in spite of management *
Dave Plowman da...@davenoise.co.uk London SW
To e-mail, change noise into sound.
Ian Spencer
was but no problems encountered with the plastic covering cracking or
anything.
Ian
Ian Jackson
<iansp...@hotmail.com> writes
Their plasticising constituents (which I suppose are responsible for
them being flexible in the first place) will gradually 'boil off'. Most
things become stiff when they get old (including me).
--
Ian
David Woolley
> In article <mamjq.10$Y_...@newsfe09.ams2>,
> David Bolton <carp...@nospam.com> wrote:
>> Quick question. Is it still considered bad form to use white coax cable
>> outside (due to UV effect)? I've got a big job starting next week where
>> they are insisting on using white cable externally.
>
>> I've always used black externally and I can't really get a definitive
>> answer to whether white (WF100) is OK these days.
>
> But did you find black PVC window frames too?
>
plasticiser that causes cables to go brittle.
Dave Plowman (News)
--
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David Woolley
> In article <j6mmkq$1k8$1...@dont-email.me>, David Woolley
> <da...@ex.djwhome.demon.invalid> wrote:
>> Dave Plowman (News) wrote:
>>> In article <mamjq.10$Y_...@newsfe09.ams2>, David Bolton
>>> <carp...@nospam.com> wrote:
>>>> Quick question. Is it still considered bad form to use white coax
>>>> cable outside (due to UV effect)? I've got a big job starting next
>>>> week where they are insisting on using white cable externally.
>>>> I've always used black externally and I can't really get a definitive
>>>> answer to whether white (WF100) is OK these days.
>>> But did you find black PVC window frames too?
>>>
>> The u in uPVC means unplasticised. It is the degradation of the
>> plasticiser that causes cables to go brittle.
>
> So no white cables are to be used outdoors?
>
that white uPVC window frames survive doesn't exclude the possibility
that white cable may survive. It will depend on the UV resistance of
the cable.
If white uPVC windows didn't survive, you might be able to infer that
white cable wouldn't, but even that might not be completely sound logic.
Steve Thackery
> Will that not be true of all coax (and other things made of plastic)?
> Their plasticising constituents (which I suppose are responsible for them
> being flexible in the first place) will gradually 'boil off'. Most things
> become stiff when they get old (including me).
(black) cable is damaged far less (because the carbon absorbs the UV at
the surface and converts it into heat).
--
SteveT
Alan
<nob...@nowhere.com> wrote
Doesn't heat destroy cable insulation just as quickly? You use a
different cable for connecting immersion heaters for a good reason and
they usually operate in cupboards not subject to UV from direct
sunlight.
--
Alan
news2009 {at} admac {dot} myzen {dot} co {dot} uk
Dave Plowman (News)
And, of course, the original colour for TV co-ax was brown - not black.
--
*No I haven't stolen it , I'm just a shit driver*
Andy Burns
> the original colour for TV co-ax was brown - not black.
A few years back I put up a new aerial and used new (foam core, braid
and foil screen) brown cable, as it turned out I had to go back up on
the roof after a couple of weeks. The outer of brown cable had already
started turning a greenish colour (except where it was under the
isulation tape strapping it to the mast).
Bill Wright
brown than you'd expect and then rapidly went green. After that the
outer crazed and fell off.
Bill
Steve Thackery
> Doesn't heat destroy cable insulation just as quickly? You use a
> different cable for connecting immersion heaters for a good reason and
> they usually operate in cupboards not subject to UV from direct sunlight.
No. At least, not the amount of heat produced by UV conversion.
I know about this because I worked for BT, which has loads of overhead
cable. It's all carbon-loaded black and, basically, lasts
indefinitely.
Sometimes a colleague would make a mistake and run the UG cable up the
pole to the distribution point at the top. It wasn't many years before
it would start to go brittle, crack and fall to bits.
--
SteveT
Graham
"Dave Plowman (News)" <da...@davenoise.co.uk> wrote in message news:521ee17...@davenoise.co.uk...
> In article <ktdaXvnN...@amac.f2s.com>,
> Alan <ju...@admac.myzen.co.uk> wrote:
>> In message <yNOdnQTiScDWpRLT...@bt.com>, Steve Thackery
>> <nob...@nowhere.com> wrote
>> >Ian Jackson wrote:
>> >
>> >> Will that not be true of all coax (and other things made of plastic)?
>> >>Their plasticising constituents (which I suppose are responsible for
>> >>them being flexible in the first place) will gradually 'boil off'.
>> >>Most things become stiff when they get old (including me).
>> >
>> >Yes, but the real killer for most plastics is UV. Carbon-loaded
>> >(black) cable is damaged far less (because the carbon absorbs the UV at
>> >the surface and converts it into heat).
>> >
>
>> Doesn't heat destroy cable insulation just as quickly? You use a
>> different cable for connecting immersion heaters for a good reason and
>> they usually operate in cupboards not subject to UV from direct
>> sunlight.
>
> And, of course, the original colour for TV co-ax was brown - not black.
And is still the best colour choice for UK brick built houses.
Someone remind me why brown CT100 isn't widely used, I see it is available.
--
Graham.
%Profound_observation%