I am hoping there is a trick I'm missing here, but I suspect the answer wil= l start with "dig it up". Please don't fail me ;-)
Doing our garden, I have buried seven metres of ducting to run cable for a = water feature. It is rubbery mains cable, and I need to get it through the = ducting. The ducting is 19mm internally, and has a slightly "grippy" feelin= g to its inside, as does the cable.
Now, I was hoping I could pull the cable down the ducting. No such luck - i= t gets stuck at the tiniest of curves. I have tried sucking it down with a = vacuum, which has been no more successful.
There are no tight bends, just gentle curves. String can be sucked down wit= h a vacuum cleaner without any problems. So, I'm guessing the issue is fric= tion - rubbery plastic against rubbery plastic.
The big question is, is there a lubricant I can add to the cable to get it = around the curves? I could dig the trunking up, but if the water feature (a= small, sealed pump) ever failed, then I would need to get a new cable down= .
I don't want to leap in trying greases, because if I used the wrong one, an= d it made matters worse, I may be stuck with trunking I can't use at all. T= he pump cable needs to thread through the base of the water feature first, = so the cable could not have been put in before the trunking was installed.
Thanks,
-- Jason