Point to point wireless might be cheaper than laying a trench. However, if
you already have the trench for other services, then this is less
attractive. I've still never come across armoured Cat5. Armoured telephone
cable is easy enough to find. If you do find armoured Cat5, let everyone
know, it could be very useful.
What sort of run is this? Have you considered using optical fibre? This
might be good for long runs, especially when you start getting serious
mismatches in earth potential. You can get media converters for around 90
quid nowadays. It is excellent for long runs in noisy environments, but
serious overkill to run it 10m to your shed.
Armoured off-the shelf is hard to come by but companies can armour it for
you, however for 50m the cost would most likely be too much to justify.
Electrical isolation - any problems in one building won't take out the
system in the other.
Avoids problems caused by differing earth potentials in different buildings.
It's probably cheaper than getting some twisted pair armoured.
Fast Ethernet today, gigabit tomorrow - fibre will take it all whereas Cat
5e just might.
You have to be careful with the differing earths, this can cause probelsm in
teh hubs/switches at either end.
If you really must use cat 5 how about some water /hose pipe and just push
the standard cat5 through that?
Yes, using conduit of some sort is certainly an option, but
steel wire armoured cable, like my mains and phone cables, would
It's a shame that there don't appear to be any suppliers for the
stuff. Armoured mains and phone are easy and cheap to obtain,
cat5 is non-existent.
Don't discount the electrical benefits of using fibre, though. You could
have real problems on Cat5 over 50m with incompatible voltage levels that
might interact with the building earthing arrangements, especially with TT
earthing, which would be recommended for such building separation. Fibre
would overcome this as it doesn't use voltage.
Agreed. Also avoids the risk of lightning strikes inducing pd in the ground
and destroying the NICs.
Surely 802.11x is the way to go for this application, but OP doesn't want
this, so I agree - fibre is the best bet.
A good place to check out products is http://www.blackbox.co.uk /
If it's for Cat 5 ethernet, I'm pretty sure the cable is isolated
at both ends, i.e. both the NIC and hub use isolating transformers
on the cable pairs. Other applications don't necessarily (like ISDN).
On Tue, 25 Nov 2003 09:19:19 +0000, The Natural Philosopher wrote:
Except that is blue for water. There is a standard colour code for
buried services, I think it's probably best to stick with it.
Unless it's a pretty straight run and large diameter pipe I doubt you
could pull another cable in. Use the the old CAT5 to pull the new
fibre in, assuming that there are no inaccesable bends...
I put a single CAT5 down just 10m of flexable plasitic conduit this
summer and unless the conduit was pretty straight there was no way the
cable was going to go through.
Dave. pam is missing e-mail
Having read what the situation is, I'd say fiber too.
Its not that expensive, and not too hard to terminate to the sort of
standard needed for relaible 50m transmission.
Ty Black Box or betterbox for various interface units.
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