I have recently moved into a brand new appartment. I was amazed to
find out that every room is equipped with only one UTP and one
coaxial cable - I think two UTP cables would be much more usual these
days. Cables are layed into installation tubes of 18 mm diameter. I
have two questions:
- Is one UTP and one coaxial cable per room normal, or am I eligible
to request cable update from the construction company?
- Since cables are layed into installation tubes, should cables be
replaceable? The problem is that installation tubes already hold
cables when they were installed, so there is a great possibility that
cables couldn't be replaced. And if cables are not replaceable, what
to do? Request a whole new installation from the construction
Thanks for the answer.
What do you want to do that isn't possible now?
Did they mislead you about the issue, or were you somehow prevented from
finding out about it?
Unless I am missing something here, I would like to see their reaction when
you request your "cable update".
Consider yourself lucky to have wiring in every room. Communications lines
are under the jurisdiction of the FCC. They have recommendations for what
the current standards should be, but as far as I know they are not
enforceable standards by the local building department. Since the existing
wiring is in conduit (I am assuming that is what you meant by "Tubes") it
may be possible to pull additional wiring in them, but that depends on the
size of the conduit and if they actually go the whole length of the wiring
run. I think some builders and owners are installing more wiring to make it
appealing to a buyer or tenant while others still go the cheapest way
Conduits present in my flat are 18 mm internal diameter PVC tuboflex
conduits for concrete installation. They run all along flat, and they
are most probably connected at two places using usual insulating tape
(I guess this is not regular installing procedure). I tried to pull
one cable out of the conduit and I failed to move it out. Maybe I did
not use enough force.
Instead of pulling on the wire you should try pushing a fish tape through
the conduits and see how far it goes and where it goes to. If it comes out
some where, put a pull string on the end and pull it through. You can use
the pull string for pulling wire through in the future if you are not ready
to pull wire at that moment.
Where are you located?
I am only familiar with construction codes and practices in the USA. Do you
have a building inspector in your town that you can consult? It is possible
that the wire was preinstalled in the tubes and you might not be able to
pull additional wires into them.
Something else you could do is stop by construction projects similar to
yours and try to see how the wiring is installed or talk to the construction
Wire WAS preinstalled in the tube - I have photos. And one electrical
engineer in the field told me that this is wrong - tubes should be
laid empty and only later filled with wires. But firms here in
Slovenia often ignore customers in hope that since it takes several
years to get your way in the court people won't put charges against
them. Also corruption is high and they could bribe construction
inspector not to give me right.
John Grabowski je napisal:
Be careful pulling on CAT5 you don't want to break what you have. You
may be right that they installed the wire as they went along and do
have too many bends in the raceway. Are you sure they don't have some
pull boxes in between? The other thing you can try is to suck some
pulling lube in there with a vacuum cleaner. Home stores and
electrical suppliers have it. Don't use oil. If you do get it to pull
air all the way through, end to end, try sucking a stout piece of
nylon string through. 2 or 3mm . Use that to pull in another cable.
I have pictures how did they did it. There is no pull boxes between.
Except from being "glued" together at two places using insulating
tape, it is one tube from one end to the other. So at least air
should go from one end to the other.
email@example.com je napisal:
18mm (3/4" for us) should be plenty for just about anything you want
to pull through it. You can try pulling on the cable to see if it
pulls free but I bet it will. In real life one CAT5 cable will support
2 ethernet LANs but you will need to split out the pairs and punch it
down on 2 keystones. I do think they make a splitter adapter though.
It is not advised to run phone and data in the same cable but I know
people who do. In a residence with limited traffic on each you will
never notice but the LAN will see the ring current if you have
mechanical ringers. In an office with a heavily loaded LAN and lots of
phone calls your data rate will take a hit since most all the packets
sent while the phone is ringing may have to be resent. or so they say
Your mileage will vary depending on cable length, quality and the
type of ringers you have.
If you have 2 devices at the far end and you don't want to hang a hub
down there for whatever reason. I am running 2 as we speak . (Media
server PC and an RTV)
You may also actually have 2 sides of the router involved, WAN on one
set of pairs and LAN on the other. The list goes on.
Of course one might not actually be Ethernet. There are still folks
who need Token Ring, S loop, Baseband or some other protocol to
support some specialized hardware.
I know most people think windoze PCs on Intel platforms running
Ethernet is all there is in the world. Look at all the different
adapters you can hang on a CAT 5 sometime.
On Mon, 14 May 2007 16:29:06 -0400, firstname.lastname@example.org wrote:
In the past, you might have located the router and modem in the same
place. That's gotten more difficult if your router is also a wireless
access point. Then it needs to be in a good location for RF, as well
as near the modem.
I try to pull cables out, but I failed. There are ideas that two
cables (coaxial and UTP) are entangled between themselves on various
places. It is also possible that conduits are layed poorly (to many
90 degree turns and patching conduits using insulating tape). But my
question is of principle nature: should conduits be layed in a way
that cables are replaceable? If this is a case this is no longer my
problem but problem of construction company and I am eligible to
request new installation in my flat.
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