CW1308B Internal/External LSZH Telecom Cable

What is CW1308B Internal/External LSZH Telecom Cable?

The CW1308B Internal/External LSZH Telecom Cable is a multi-pair screened communications and signaling cable engineered in accordance with British telecom standard CW 1308B and IEC/EN 60228. Utilizing 0.5mm Class 1 solid copper conductors, high-dielectric PVC insulation, an integrated 1.38mm insulated white earth wire, a polyester separator tape, an overall Aluminium/Polyethylene (Al/PE) tape shield, and a black Low Smoke Zero Halogen (LSZH) thermoplastic outer sheath, it is designed for high-density voice distribution and low-level control systems.

Unlike standard internal-only telephone wires, the CW1308B hybrid design incorporates enhanced mechanical, environmental, and fire-safety properties. The collective Al/PE laminate screen prevents electromagnetic interference (EMI) and electrostatic disturbance between adjacent circuits. Simultaneously, the halogen-free LSZH jacket prevents the emission of toxic halogen acid gases and dense black smoke during fire incidents, ensuring regulatory life-safety compliance when transitioning directly from outdoor service ducts into indoor vertical riser networks.

CW1308B Internal/External LSZH Telecom Cable Construction

• Conductor: Class 1 solid plain annealed copper conductors (0.5mm diameter) complying with IEC/EN 60228 for consistent conductivity and stable IDC termination.
• Earth Wire: Integrated 1.38mm diameter insulated white copper earth wire providing earth continuity and shielding drain connectivity.
• Insulation: Polyvinyl Chloride (PVC) compound engineered for low-dielectric transmission loss up to +70°C.
• Separator: Helically wrapped polyester tape providing mechanical core binding and dielectric separation.
• Screen: Overall Aluminium/Polyethylene (Al/PE) composite foil screen delivering complete electrostatic coverage and moisture mitigation.
• Outer Sheath: UV-resistant Low Smoke Zero Halogen (LSZH) thermoplastic compound, flame retardant per BS EN 60332-1-2.
• Pair Identification: Standard CW1308 color coding scheme arranged in paired combinations and segregated into 20-pair unit lapping groups using color-coded binder tapes.
• Sheath Colour: Black.

Applications

CW1308B Internal/External LSZH Telecom Cables are designed for telecommunications backbones, exchange wiring, and low-voltage control systems requiring transitions across indoor and outdoor environments.

• Telecom Backbone & PBX Distribution: Primary trunk runs linking main distribution frames (MDF), cross-connect cabinets, and PABX telephony exchanges.
• Internal & External Transition Pathways: Continuous runs connecting external street duct infrastructure into indoor equipment rooms without intermediate splice enclosures.
• Low-Level Signal & Instrumentation Circuits: Multi-channel telemetry links, environmental sensor networks, and gas alarm monitoring loops.
• Public Transit Hubs & Commercial Facilities: Halogen-free communication raceways across rail stations, airport terminals, healthcare complexes, and educational institutions.

Specifications & Dimensions

The CW1308B Internal/External LSZH cable portfolio encompasses multi-pair configurations from 10 pairs up to 200 pairs (including 20PR, 50PR, 75PR, 80PR, and 100PR layouts), all built with 0.5mm nominal solid conductors and an integrated 1.38mm insulated earth conductor. Operating across a rated temperature range of 0°C to +70°C, the cable maintains a minimum installation bending radius of 15 times the overall cable diameter. Overall outer diameters span from 9.0mm on 20-pair cables to 25.6mm on high-capacity 200-pair assemblies, with nominal cable weights ranging from 98 kg/km to 1,155 kg/km. Electrical characteristics include a maximum conductor DC resistance of 97.8 Ω/km at 20°C, minimum insulation resistance of 50 MΩ/km, and maximum capacitance unbalance limited to 500 pF/km, strictly adhering to British CW 1308B manufacturing criteria.

Standards

Design Standards: CW 1308B, IEC/EN 60228
Flame Retardancy: BS EN 60332-1-2
Low Smoke Halogen Free: IEC/EN 60754-1/2, IEC/EN 61034-1/2
Operating Temperature: 0°C to +70°C
Minimum Bending Radius: 15 × overall diameter
Regulatory Compliance: European Regulation EN 50575 (CPR Compliant), Low Voltage Directive 2014/35/EU, CE Marked, RoHS Directive 2015/65/EU, REACH EC 1907/2006

Frequently Asked Questions

Q: What allows CW1308B cables to be routed both internally and externally?
A: CW1308B incorporates an overall Al/PE screen for moisture resistance and an outdoor-grade UV-resistant black LSZH jacket that is also certified flame retardant and zero-halogen, enabling smooth installation across indoor-outdoor boundaries without transition splicing.

Q: What is the purpose of the 1.38mm white insulated earth wire in the core assembly?
A: The integral 1.38mm solid copper conductor provides an earth continuity path and bonding terminal for grounding networks and surge protection units without requiring separate earth wire runs.

Q: What is the maximum capacitance unbalance permitted by standard CW 1308B?
A: The standard limits capacitance unbalance to a maximum of 500 pF/km, ensuring circuit balance and mitigating crosstalk across adjacent transmission pairs.

Q: What commercial payment terms are available for international project orders?
A: Huadong Cable Group accepts standard international commercial payment terms, including Telegraphic Transfer (T/T, with 30% advance deposit and 70% against shipping documents) and 100% Irrevocable Letter of Credit (L/C) at sight.

CW1308B – Why Choose Huadong Cable?

Huadong Cable Group manufactures CW1308B Internal/External LSZH Telecom Cables in strict compliance with CW 1308B and IEC/EN 60228 standards, verified by comprehensive laboratory testing for conductor resistance, mutual capacitance, and zero-halogen fire response. By utilizing high-purity electrolytic Class 1 solid copper conductors and uniform PVC insulation extrusion, our cables maintain low transmission losses and clean voice/data clarity across long-distance distribution backbones. The integrated Al/PE screen and durable LSZH compounding ensure physical stability and life-safety compliance in both external conduits and internal building risers.

Backed by more than 20 years of precision cable engineering expertise, Huadong Cable Group operates advanced multi-pair bunching, unit cabling, and LSZH jacket extrusion lines certified to ISO 9001, CE, CPR (EN 50575), RoHS, and REACH protocols. By eliminating commercial distributor markups, we provide competitive factory-direct pricing, 100% routine Mill Test Certificates (MTC) tested in accredited testing facilities, continuous drum lengths on ISPM 15 heat-treated export wooden reels, and seamless door-to-port logistics for telecom network operators and EPC contractors globally.