[K12OSN] OT building to building ethernet wiring

Doug Simpson simpsond at leopards.k12.ar.us
Tue Oct 19 15:37:46 UTC 2004

As an experienced lightning survivor (previously non-survivor) It would 
not even be up for consideration to use anything except fiber between 
buildings.  Unless you wanted to use wireless (about the same price but a 
serious performance hit)

Don't even consider using Cat5e between buildings, or any other conductive 

You have been advised. . .  YMMV

I even have  afiber running between two different parts of the same 
building here to safeguard against this very problem.  One end of the 
building (the old part) is on it's own power company transfromer and the 
other end (a newer part) is on it's own power company transformer but even 
though they are in the same building, they are not connected by copper in 
any way.  In fact, the electricians who wired the building will not even 
run power from one section to the other so that right there tells you 
something about it. . .

Doug Simpson
Technology Specialist
DeQueen Public Schools
DeQueen, AR 71832
simpsond at leopards.k12.ar.us
Tux for President!

On Tue, 19 Oct 2004, Jim Kronebusch wrote:

> > Hello,
> > 	I wanted to get a wiring opinion from the list.  I need 
> > to extend a 
> > network from a school office to a few adjacent buildings.  
> > Each building 
> > will have 5 or less workstations or LTS clients.  The lengths 
> > are less 
> > than 30m.  I am considering running cat5e/6 thru metal conduit -vs- 
> > fiber.  I am concerned with ground potential between 
> > buildings and cable 
> > loss etc -vs- cat2fiber and fiber2cat costs.  Can I try it 
> > with cat, or 
> > should I just use fiber?
> I assume cost is an issue or this would be a no brainer (fiber).  Since
> you are concerned about cost I believe the proper way would be to run
> this inside a conduit (I think the standard is #80 plastic) with
> Shielded Twisted Pair cable and ground the cable on both ends (to a
> standard electrical ground, not the patch panel).  This should help
> prevent noise problems and electrical surges.  But if you have the money
> definitely go fiber, and pull it in a separate conduit to avoid future
> damage when other cables are pulled between buildings.  This will also
> give you room to grow bandwidth wise in the future since fiber is
> virtually unlimited in its potential.
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