Oh fun T-Bar Ceilings. What I have done is take a piece of 1/2" EMT and cut 1 slice diagonal like you wear peeling an orange, so that you have something that looks sorta like a sickle. You want to unwind it just enough so that after you loop the hanging wire you can twist the conduit and cause the wire to wrap around its self.
When you place the wire inside the conduit bring two feet out the top, bend at 1 foot and hook onto the conduit, the wire should be very close to the conduit, at the top there should be a loop just the size of the bar to fit over, at the bottom of that one foot section, make a leg so that it will slip around the bar. So when placed around the bar, the loop at the top is wide enough so that the wire close to the conduit and the one foot section will be close enough for your sickle to catch, and begin twisting.