BS 5839-8 Voice Alarm Fire Resistant Screened Control Cable
BS 5839-8 Voice Alarm Fire Resistant Screened Control Cable is a 300/500V mica-and-silicone-rubber insulated, overall-screened LSZH cable for voice-alarm systems. Its fire-resistant insulation, screened construction and low-smoke zero-halogen sheath are intended for building life-safety circuits where reliable signalling and circuit continuity are required during fire conditions.
PRODUCT OVERVIEW
This 300/500V fire-resistant overall-screened control cable combines plain annealed copper conductors with a mica-glass fire-resistant tape and fire-resistant silicone-rubber insulation, an aluminum/polyester overall screen with tinned-copper drain wire, and a low-smoke zero-halogen outer sheath. The construction is designed to maintain circuit integrity during fire conditions while also providing an overall screen for control and signalling circuits.
The overall aluminum/polyester screen and tinned-copper drain wire support screened control and signalling circuits, while the mica-glass tape and fire-resistant silicone-rubber insulation provide the core fire-survival construction. The product range includes 2-, 3-, 4-, 7-, 12- and 19-core configurations with dimensions and weights defined by size.
KEY FEATURES
- 300/500V fire-resistant screened control cable.
- Plain annealed copper conductors: solid Class 1 or stranded Class 2 to IEC/EN 60228.
- Mica-glass fire-resistant tape with fire-resistant silicone-rubber insulation type EI2.
- Aluminum/polyester overall screen with tinned-copper drain wire.
- Thermoplastic LSZH outer sheath type LTS3; thermosetting LSZH SW2-SW4 can be offered.
- PH120 mechanical-shock circuit-integrity reference in the product designation.
- Operating temperature: -30°C to +90°C; installation temperature: -20°C to +50°C.
- Minimum bending radius: 7.5 × overall diameter.
- Application reference: BS 5839-8 for voice alarm systems.
- Overall screened multicore construction for voice-alarm control and signalling circuits.
VOICE ALARM SYSTEM FOCUS
Voice-alarm systems form part of building emergency communication arrangements and rely on control and signalling circuits that must remain dependable under fire conditions. This cable combines fire-resistant insulation, LSZH materials and overall screening, allowing it to be specified where the project requires screened fire-resistant multicore cable for voice-alarm control, interfaces or related auxiliary circuits.
CABLE CONSTRUCTION
Voltage Rating | 300/500V |
Conductors | Plain annealed copper; solid IEC/EN 60228 Class 1 or stranded Class 2 |
Insulation | Mica glass fire-resistant tape + fire-resistant silicone rubber compound type EI2 |
Cabling | Cores cabled in concentric layers with suitable non-hygroscopic fillers |
Overall Screen | Aluminum/polyester tape with tinned copper drain wire |
Circuit Protective Conductor | Uninsulated tinned copper conductor, same section and class as insulated conductors in 2-, 3- and 4-core cables |
Drain Wire for >4 Cores | 0.5 mm² tinned copper conductor |
Outer Sheath | Thermoplastic LSZH LTS3; optional thermosetting LSZH SW2-SW4 |
Sheath Colour | Red or white; other colours on request |
Operating Temperature | -30°C to +90°C |
Installation Temperature | -20°C to +50°C |
Minimum Bending Radius | 7.5 × overall diameter |
PRODUCT APPLICATIONS
- Voice alarm systems referenced by BS 5839-8.
- Voice-alarm control and interface circuits.
- Building emergency communication and evacuation-related control circuits.
- Projects requiring screened LSZH fire-resistant multicore cable.
| Cores | Cross Section mm² | Insulation mm | Sheath mm | Overall Diameter mm | Approx. Weight kg/km |
|---|---|---|---|---|---|
| 2 | 1.0 | 0.6 | 0.9 | 7.9 | 85 |
| 2 | 1.5 | 0.7 | 0.9 | 8.8 | 105 |
| 2 | 2.5 | 0.8 | 1.0 | 10.2 | 150 |
| 2 | 1.5 | 0.7 | 0.9 | 9.2 | 110 |
| 2 | 2.5 | 0.8 | 1.0 | 10.3 | 155 |
| 2 | 4.0 | 0.8 | 1.1 | 12.2 | 220 |
| 3 | 1.0 | 0.6 | 0.9 | 8.4 | 105 |
| 3 | 1.5 | 0.7 | 0.9 | 9.3 | 130 |
| 3 | 2.5 | 0.8 | 1.0 | 10.8 | 190 |
| 3 | 1.5 | 0.7 | 0.9 | 9.4 | 135 |
| 3 | 2.5 | 0.8 | 1.0 | 10.9 | 190 |
| 3 | 4.0 | 0.8 | 1.1 | 13.0 | 280 |
| 4 | 1.0 | 0.6 | 1.0 | 9.3 | 125 |
| 4 | 1.5 | 0.7 | 1.0 | 10.3 | 165 |
| 4 | 2.5 | 0.8 | 1.1 | 12.0 | 240 |
| 4 | 1.5 | 0.7 | 1.0 | 10.5 | 170 |
| 4 | 2.5 | 0.8 | 1.1 | 12.1 | 250 |
| 4 | 4.0 | 0.8 | 1.2 | 14.4 | 350 |
| 7 | 1.0 | 0.6 | 1.0 | 10.5 | 175 |
| 7 | 1.5 | 0.7 | 1.1 | 12.1 | 230 |
| 12 | 1.0 | 0.6 | 1.1 | 14.5 | 300 |
| 12 | 1.5 | 0.7 | 1.2 | 16.0 | 380 |
| 19 | 1.0 | 0.6 | 1.2 | 17.5 | 470 |
| 19 | 1.5 | 0.7 | 1.3 | 17.5 | 470 |
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From Production to Delivery
From raw material preparation to final shipmen, every stage is caretuly controled to ensure consistent conductor quality, reliable pertormance,and sae delivery. Our roduction,
inspection, packaging, and logistics processes are managed in accordance with applicable standards and project requirements.
Production
Plain annealed copper conductors are prepared as solid Class 1 or stranded Class 2 constructions, wrapped with mica-glass fire-resistant tape, insulated with fire-resistant silicone rubber, cabled with fillers, screened with aluminum/polyester tape and a tinned-copper drain wire, then finished with the specified LSZH sheath.
Inspection
Inspection focuses on screen continuity, drain-wire arrangement, mica/silicone insulation, LSZH sheath quality, conductor construction, dielectric test, insulation resistance and required fire-performance documentation.
Packaging
Finished cables are wound onto suitable drums according to ordered size and length. Cable ends are secured and protected, and drum identification can include cable code, core count, conductor size, length and project reference.
Shipping
Before shipment, cable drums and accompanying technical documents are checked against the order and packing list. Test records, product identification and project documentation can be prepared according to customer requirements.
Frequently Asked Questions
What system application is this cable intended for?
Voice alarm systems referenced by BS 5839-8.
What is the voltage rating?
300/500V.
Is the cable overall screened?
Yes, with aluminum/polyester tape and a tinned-copper drain wire.
What multicore sizes are listed?
2, 3, 4, 7, 12 and 19 core constructions are listed in the source data.
Is the outer sheath LSZH?
Yes, thermoplastic LSZH LTS3 is specified; a thermosetting LSZH option is also noted.
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