VERTICAL CABLE 273-275 SERIES – TIGHT BUFFER ARMORED PLENUM FIBER CABLE (OM3, OM4, OS2)
The 273-275 Series is a family of tight buffer armored fiber cables wrapped in aluminum interlocking armor and rated OFCP for plenum use. It comes in OM3, OM4, and OS2 singlemode, in 6, 12, and 24-fiber counts, and suits indoor, outdoor, and underground conduit runs. The armor can replace inner duct, and the small, light cable fits in limited conduit space, so this tight buffer line helps cut installation time and cost.
KEY FEATURES
Here’s what makes the 273-275 Series a rugged tight buffer armored fiber cable:
- Tight Buffered Construction: Rugged, easy-to-handle construction for indoor and outdoor runs.
- Aluminum Interlocking Armor: Protects the fibers from crush and rough handling.
- OFCP Plenum Rated: Plenum-rated PVC jacket and tight buffer for air-handling spaces.
- Multimode and Singlemode Options: OM3 and OM4 multimode, plus OS2 singlemode (G657.A1).
- 6, 12, and 24-Fiber Counts: Match the cable to your project’s capacity.
- Crush Resistant: Rated for 100 N/cm.
- Strong Pulling Strength: Water-blocking aramid yarn strength member and a maximum tensile strength of 1200 N (270 lbf).
- Small and Light: Outer diameters of just 0.51 to 0.64 in (13 to 16.3 mm) for tight conduit space.
- Can Eliminate Inner Duct: The armor eliminates the need for a separate inner duct or conduit, saving installation time and cost.
- Color-Coded Fibers: 24-color identification for fast fiber tracing and termination.
- Wide Temperature Range: Operates from -40°F to 158°F (-40°C to +70°C).
- RoHS Compliant: Free of hazardous substances per RoHS 2011/65/EU.
APPLICATIONS
The 273-275 Series fits a wide range of fiber installations:
- FTTx Deployments: Rugged, compact cable for fiber-to-the-premises builds.
- Indoor and Outdoor Runs: One cable family for pathways that cross the building envelope.
- Underground Conduit: Suitable for conduit installations.
- Backbone and Computer Room Cabling: Armored protection for data center and equipment room runs.
- Local Area Networks (LAN): Dependable multimode and singlemode links.
- High-Security Environments: Armored construction adds physical protection.
- Inter-Building Connections: Link buildings with a single, rugged cable.
WHY CHOOSE THE 273-275 SERIES TIGHT BUFFER ARMORED FIBER CABLE?
Professionals choose the 273-275 Series for its ruggedness, compact size, and flexibility across fiber types. Here are 5 reasons to specify it for your next project:
- Armor Built In: Aluminum interlocking armor protects the fibers and can save you the cost of an inner duct.
- Plenum Rated: OFCP rating for air-handling spaces, with a plenum-rated tight buffer and jacket.
- Every Fiber Type You Need: OM3, OM4, and OS2 in the same rugged construction.
- Compact and Light: A small outer diameter makes it easier to fit in limited conduit space.
- Made for Rough Conditions: Crush resistance and a strong aramid strength member stand up to demanding installs.
GETTING IT INSTALLED?
Once you’ve picked your 273-275 Series configuration, here’s what to keep in mind:
- Bond and ground the armor. The aluminum armor makes this a conductive cable (OFCP), and NEC Article 770 requires bonding and grounding conductive cable as close as practicable to where it enters the building.
- Watch your bend radius. Keep bends at 20x the cable diameter during the pull, roughly 10 to 13 in, depending on the fiber count. Once installed, you can go down to 10x.
- Mind the pulling tension. Stay under the 1200 N (270 lbf) maximum tensile strength, and pull steadily rather than in jerks.
- Check the jacket marking for your environment. The cable is suitable for indoor and outdoor use, but confirm the printed marking and ratings meet your project’s needs.
- Choose the right fiber type up front. OM3, OM4, and OS2 aren’t interchangeable, so match them to your equipment and distance requirements.
- Confirm with your local authority. Plenum, grounding, and conduit requirements can vary by jurisdiction.
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