David Hansen wrote:
On Sun, 18 May 2008 04:53:25 -0700 (PDT) someone who may be pj
wrote this:-

I would like to link our house and garage using cat5/6 data cable
allowing internet to be shared. The route i would like to take
requires digging a trench and the total cable distance comes to about
70m inluding going around walls etc.


A distance of say 40m in a straight line between buildings is not
good for connecting by copper data cables, for the reasons others
have given. There are precautions which can be taken, but these add
to the cost.


Gosh: you had better tell BT that, since most of the country is fed by
copper cables in excess of a kilometer long.

Underground copper is totally fine: you wont get gigabit speeds, but
should get 100Mbps, and if worried abut comon mode voltage stuff, use
baluns.