Cable-in-Conduit (CIC): Definition and How It's Used in Fiber Construction
Cable-in-conduit (CIC) is fiber cable pre-installed inside protective conduit before burial. See how CIC speeds up OSP fiber construction projects.
Cable-in-conduit (CIC) is fiber optic cable that comes pre-installed inside its protective conduit at the factory, rather than pulled or blown into empty conduit separately in the field. Crews place the finished assembly directly in the trench or duct bank, combining the cable and its raceway into a single product delivered on a reel.
How Cable-in-Conduit Is Made
Cable-in-conduit ships from the factory as one finished assembly. The manufacturer feeds loose-tube or ribbon fiber cable into a smooth-wall or corrugated HDPE conduit during production, so the two components arrive on the same reel already mated. Some CIC also includes a pre-installed pulling tape or a lubricated inner wall to ease future re-pulls. Because the cable and conduit are sized and tested together at the factory, contractors avoid the fit and friction problems that come from matching separately sourced cable and duct in the field.
Where Crews Use CIC
Crews use CIC most often on directional bore and direct-burial segments where opening a duct bank isn't practical, and on short, high-value runs where downtime from a broken pull is unacceptable. It shows up in rural long-haul builds, campus and data center laterals, and drops that connect a handhole to a building entrance. Because the assembly goes into the ground as one unit, it removes an entire step, and an entire failure point, from the build.
CIC vs. Pulling Cable Into Empty Conduit
Standard construction places empty conduit first, then pulls or air-blows cable through it later, often by a different crew. CIC collapses that into a single install pass. The tradeoff is flexibility: empty conduit can be resized or reused for a different cable later, while CIC is fixed to whatever fiber count and conduit diameter the manufacturer built. Fiber Construction Company chooses between the two based on segment length, splice plan, and how likely the route is to see a second cable pulled through it down the road.
Cable-in-Conduit (CIC), answered
What is Cable-in-Conduit (CIC)?
Cable-in-conduit (CIC) is fiber optic cable that comes pre-installed inside its protective conduit at the factory, rather than pulled or blown into empty conduit separately in the field. Crews place the finished assembly directly in the trench or duct bank, combining the cable and its raceway into a single product delivered on a reel.
Is cable-in-conduit the same as innerduct?
No. Innerduct is empty conduit installed inside a larger duct to create smaller pathways for future cable pulls. Cable-in-conduit already has the fiber cable inside it when it arrives on site, so there is no separate pulling step.
Can you splice or re-pull cable-in-conduit later?
Splicing works the same as any other fiber cable once the conduit is opened at a handhole or splice enclosure. Re-pulling a different cable through the same conduit is harder than with empty duct, since CIC is sized for the cable it shipped with.
When does CIC make sense over standard duct-and-pull construction?
CIC generally wins on directional bore segments, short high-value drops, and any route where a broken mid-pull would be costly to fix. Standard duct-and-pull still makes sense on long runs or routes likely to carry a second cable later.