On the wiki page (see first link), it says that four glass cables, one redstone dust and one glowstone dust
make a dense cable.

As you can see on the screenshot I added (see second link), it should be four covered cables instead of four glass cables.

http://ae-mod.info/ME-Covered-Cable/
https://gyazo.com/7ff991dbac73e5c08e7bd8774499aae4

Fixed