Outdoor Overhead Duct Optical Cable

One Cable, Two Worlds

Every fiber route eventually meets a split personality: one section runs overhead, strung between poles where wind and ice pull at the cable; the next drops into underground duct, where friction and tight bends try to stop the pull. Historically, contractors ordered two cable types and paid for transition splices at every mode change. The outdoor overhead duct optical cable collapses those two worlds into a single reel - one construction that satisfies both the span and the conduit.

Engineered for the Span

Tensile Strength for Aerial Duty: Aramid or FRP strength members give the cable a rated tensile strength of 2,000–3,000 N. That reserve handles not only the static load of a 100 m pole span but the dynamic shock of wind gusts and ice accumulation, which can multiply effective load several times over.

Sag-Tension Control: Controlled excess fiber length inside loose tubes means the jacket and strength members can stretch under load while the fiber stays strain-free. Sag is kept predictable, so clearance over roads and railways is maintained without violating right-of-way rules.

UV-Stabilized PE Jacket: Outdoor exposure means decades of sunlight. The high-density polyethylene sheath resists UV degradation and ozone cracking, keeping its mechanical properties through the full service life without a secondary protective layer.

Tuned for the Pull

Low-Friction Surface: The smooth PE jacket has a low coefficient of friction against HDPE conduit, cutting pulling tension by roughly 30% compared to textured or braided jackets. Longer continuous pulls mean fewer intermediate hand-holes.

Compression and Bend Tolerance: Rated crush strength of 1,500–2,000 N/100 mm and a minimum bend radius of 15× cable diameter (10× during installation) let the cable negotiate the tight bends and stacked conduits typical of underground duct networks.

Rodent-Resistant Option: For routes where duct runs are interrupted by hand-holes, an optional glass-yarn layer adds chew resistance without sacrificing the low-friction surface - a middle ground between unprotected PE and heavy steel armor.

Where This Cable Earns Its Keep

Rural and Suburban Distribution: Mixed pole-and-duct networks are the norm outside dense cities. One SKU covers both segments, so field crews carry fewer reel types and never wait on the wrong cable.

Campus and Industrial Loop Networks: Power distribution and telecom often share corridor infrastructure - overhead on the perimeter, ducted near buildings. The dual-role cable simplifies the loop while keeping plant standards uniform.

Temporary and Rapid-Deployment Projects: Disaster recovery, event networks, and construction-site links frequently alternate between aerial and ducted stretches. A single cable type speeds deployment and simplifies spare-part stock.

Utility and Highway Corridor Backbones: Long rights-of-way that mix pole lines and buried duct sections benefit from consistent mechanical performance across both environments, reducing splice points and the failure risk each joint carries.

Advantages at a Glance

One SKU, two installation profiles: eliminates transition splices and dual inventory

2,000–3,000 N tensile rating: safe for 100 m spans with wind and ice loading

30% lower pulling tension: longer duct pulls between hand-holes

Strain-free fiber: excess length design keeps attenuation stable under load

UV and ozone resistant: 25-year outdoor service without sheath degradation

Key attributes

Packaging and delivery

Lead time

Packaging & Shipping

FAQ

Q1: What is the maximum overhead span length?

For a 2,000 N tensile-rated cable with a standard 4 mm messenger-attached installation, spans of 80–100 m are typical. Longer spans are possible with additional strength members or intermediate support; we can calculate sag and load for your specific pole spacing.

Q2: Can this cable be blown into ducts instead of pulled?

Yes. The low-friction PE jacket works well with air-assisted blowing. Blowing distance depends on duct condition and route bends, but 1,000–1,500 m per section is achievable on straight, clean conduit runs.

Q3: How does it handle ice and wind loading?

The cable is designed for a maximum operational tension that accounts for ice build-up up to 10 mm radial thickness and wind speeds to 120 km/h on a 100 m span. For heavier ice regions, we recommend a version with increased strength members.

Q4: What is the difference between this cable and standard duct cable?

Standard duct cable optimizes only for pulling - its tensile rating is often too low for overhead spans. This cable adds aramid/FRP strength members and UV-stabilized jacket, so the same construction safely handles aerial duty without compromising duct performance.

Q5: Is an armored version available?

Yes. A corrugated steel tape (CST) armored variant offers crush resistance up to 3,000 N/100 mm and rodent protection for direct burial or exposed hand-hole sections, while retaining the same fiber and tube structure for splicing compatibility.