If you are going to run it underground, I would suggest the use of
Shielded CAT 5 cable .. it has much heavier outer jacket and better
wires ... it also has a ground drain ... this is good for a number of
reasons, interference immunity being one of them ... I would put
it in a plastic conduit from the home to the garage
You can usually get it a major electrical supply house
This site sells a 1000 ft box for only $160
http://www.cablewholesale.com/catalog/cat5estpcables.htm ... part #10X6-521TH
Note: Shielded CAT 5 requires a Special Connector
http://www.tessco.com/products/displayProductInfo.do?sku=441602&eventPage=1 .. part #441602
Shielded cat 5 is almost the same diameter as RG59 tv coax and as such, will not fit into a normal
size RJ45 connector ... installation is the same, just takes more pressure on the crimper