I have been through three different sets of push rods, and that was after starting out with 5' sections of 1/2" pvc pipe with screw on couplings and then chimney rods. Here is what I have found:
* the PVC was cheap, but it worked
* the chimney rods were pretty good, plenty strong, far too bulky and the couplings were rather large.
* next was a set from mike the sandman (
i think) which were yellow fiberglass, and great. They were 6' rods i think, quite small 1/4" in diameter and very strong, and the best part was the screw together portion...the two parts nested together before the threads, hard to explain, but in short there was no stress on the threaded part because there was a sleeve that the tip slid into, NEVER had a problem with the coupling and uncoupling. ONLY downside was after repeated flexing and bending the fiberglass splinters a bit and gets little teeny slivers in the hands.
* next was a product I found at a BICSI show, screw together fiberglass rods with a poly coating. They fixed the sliver part, but the couplings were not strong and the rods were flimsy. I still have them, they are slick on the outside, great in a cable tray/conduit/trough but not rigid enough to span much. The same company also made a fiberglass/poly tape, like a metal fishtape but fiberglass, that was only 20 feet long for walls and short hops, I use that all the time, very nice.
* tried some bright green rods that were supposed to be great. They were fiberglass, almost translucent, with very small bolt/coupling combination. The bolts were maybe 6/32 size. We broke 4 in one job, they sucked.
* latest addition is a 3 piece set by greenlee. They rock, much like the yellow ones I got from the sandman, these bolt together with the same sleeve concept that protects the bolt. No problem flexing and breaking, they just are very durable yet flexible. Also they came with a screw on hook for one end, very handy.
Now, all that said *laughs* I also have a metal fish tape and a poly fish tape as well. They all have their own uses. In conduit, the fishtape is the way to go. Down walls, I really like the rectangular fiberglass short one, you can rotate it and almost steer it down the wall.
Pushing over the ceiling tile....we havent put wire on the tile for years, its a NEC violation, closest we get is mounting "D" rings to the structure above the ceiling, or some other support, and pushing the rods thru the rings with wire attached to the end.
Lots of personal preference, but if you are pushing wire in open spaces above the drop ceiling, the good fiberglass rods should get you 12-15 feet without having to open a tile, which can save quite a bit of time.
Good luck!
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com