Flexible polyethylene tube, often 1 to 1.5 inch, pulled into a 4-inch conduit or run through ceilings and risers to give each fiber cable its own lane. It protects fiber from heavier cables, keeps paths organized and lets you add cables later without disturbing live ones. Textile innerduct, a flat fabric sleeve with pull tapes, fits more cables into the same conduit.
Pull three orange innerducts into the four-inch so we can add the second ring later without touching the live cable.
Also heard as
- subduct
- inner duct
Related terms
Mule tape
Flat, low-stretch polyester pull tape with printed footage marks, left in conduit to pull cable later.
Blown fiber
Fiber or microcable pushed through small ducts by high-speed compressed air instead of being pulled with a line.
Pull
A cable pulling operation, from setup at the feed end to the cable arriving at the far vault.
Rod
To push a stiff fiberglass duct rodder through a conduit to prove the path or to carry a pull line through.