Aczlan wrote:I would use a vacuum and a "mouse" to pull a pullstring through, then pull the cable with that.
I wanted to do that but ran into the following problems:
You can't get good pressure in the conduit (positive or negative) because it has five T junctions along the way where a vertical run goes up then elbows into the various offices. There is no conduit running through the actual cinder blocks, there is only a hole that goes through at each point but that leaves a pretty big void between the inner and outer block edges.
At the point where the conduit goes around the corner there is a 90 degree junction box - not a bend, but there is a hole coming in one side then a hole going out on another. That's how I found out about the void in the block - I ran my tape from this box back to the point of entry where it promptly took a nose dive down between the sides. A piece of cardboard wedged in there to bridge the gap fixed that problem.
Easy to fix with a longer piece of fish tape - that will get me from the corner to the first riser where I can open the junction and pull it up the foot or so and poke it through the wall, then push my tape through to the next riser which is only about 2/3 the distance from the corner (without any of the wobbles), 2 feet to the next one, then 20 feet to the next one and then another two feet to the last one. The only problem was getting from the corner to the first point of entry.
Fortunately I figured out the potential problems before they installed the 2nd run of conduit and asked them to put the string in as they went along. For the longer and more complicated run I already have pretty pull strings sticking out of the wall