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The
material you described is fine but do the following. I built, operated and
maintained a cable TV business. We installed pulling string in all our
conduits during the course of construction. You then attached a pulling
rope and pulled it through the conduit with the pulling string. Second you
then pulled the cable along with another pulling string. Always have a
pulling string in the conduit and you can use the corrogated material you speak
of. As an aside the corrogated tubing has less contact area thus reduced
friction. Another idea is to simply install an extra wire or two for
future use as needed.
Bob
Smiley
N94RJ
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