JF Ptak Science Books  Post 1555   [Part of the History of Lines series]

Barbed wire was one of the most successful and horrifying defensive weapons of World War I.  In 1915 it was made more effective yet by adding high-voltage electricity to the emplacements.  In general the electrical barbed wire fence was employed as only a tiny fraction of all wire fences during the war–as the non-electrified fence was already extremely effective, very cheap to produce and very easily installed–but the possibility of finding an electrified wire somewhere along the lengthy rat’s nests of mile sand miles of this thing must’ve had some sort of weight in most soldiers’ minds. 

The following image (and details) from The Illustrated London News for 9 October 1915:

And the places where the barbed wire was made and packaged, again from The Illustrated London News for 16 October 1915.

It looks as though the wire was stretched across 3.5 foot poles, with the barbed wire added diagonally, and then rolled up in long sections for easy transport and deployment.