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John Rumm John Rumm is offline
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Default Structured Wiring Systems - new wiki article

John Weston wrote:
In article , "John
Rumm" wrote:

What other explanations / photos do you think would make it a bit clearer?


John

Very good addition, IMO, after having had to sort out some rat's nests.

One omission as far as I can see is the subject of cable labelling.
Even on a simple system, it is good practice to label the cables at


Good point - you can see it in the photos, but I have not really covered
it in the text.

least at each end. There should also be some labelling of the sockets,


You can probably skip this on a domestic setup since the groups of
sockets will be identifiable generally by location. i.e. the sockets on
the patch marked "kitchen" end up at the sockets there. The convention
that the left socket will always be the lowest number then takes over.

Obviously in an office with 30 sockets, numbering both ends takes on
more significance! ;-)

behind the removable window. This will make it easier to trace problems
or do the initial wiring up to the terminations. Remember it may not be
the installer who is doing the maintenance.

Perhaps also include a section showing the various types of cable marker
available and some alternative DIY ones, with a warning not to use
ordinary tape that will unwrap itself, or Sellotape that goes brown :-)
The cheapest I've used for casual installations is a permanent marker
pen that can be used to write on the actual cable, but this can be
missed, if you forget to put a mark all round the cable...


The little dispensers that give a white sticky tab with clear section
are quite good. You write on it in the dispenser, adn then pull the
label out. As you wrap it round the cable the later clear section acts
to protect the written on white section.

I wouldn't like to sort out your bundle of cables in a restricted space
after you've taped them up, as in the garden picture :-) Not everyone
has a cable tracer... (Link required to a suitable model?)


Yup will add a link.

On my bundles I wrote the pair number on every other taping (plus each
end), before I grouped the pairs into larger bundles. I figured just in
case I ever needed to identify which was which mid span.

I might add an example numbering table etc, to re-enforce the message!

How about a note to include a pull-through if the cables go through an
inaccessible void? If this is included, make a note that it should be
double length with the pull loop in the middle, so it isn't single use
should someone forget to pull through a replacement along with the
cable...


Yup, although that might be covered in the electrical installation
article that deals more specifically with cable installation techniques.

How about noting the use of cable trays or similar support for large
cable looms? Can be DIY types.


Could do...

Also add a note about not running structured cabling alongside Mains or
similar interference-source cables.


I thought I had mentioned that somewhere... yup - last para of "Design"
section.

--
Cheers,

John.

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