BS 7629-1 Fire Resistant Screened Control Cable 300/500V
BS 7629-1 Fire Resistant Screened Control Cable is a 300/500V silicone-rubber insulated, overall-screened LSZH control cable designed for fire-resistant control and signalling circuits. It combines plain annealed copper conductors, fire-resistant silicone-rubber insulation, aluminum/polyester overall screening with tinned-copper drain wire, and a low-smoke zero-halogen outer sheath.
PRODUCT OVERVIEW
The cable is basically designed to BS 7629-1 and is intended for fixed control, signalling and life-safety circuits where circuit integrity during fire conditions is required. Conductors may be solid Class 1 or stranded Class 2 in accordance with IEC/EN 60228. The cores are insulated with fire-resistant silicone-rubber compound type EI2, cabled together with non-hygroscopic fillers, wrapped with an aluminum/polyester overall screen and tinned-copper drain wire, and finished with an LSZH sheath.
The available range includes 2-, 3-, 4-, 7-, 12- and 19-core constructions. For 2-, 3- and 4-core cables, an uninsulated tinned-copper circuit protective conductor of the same section and class as the insulated conductors is used; for cables with more than four conductors, a 0.5 mm² tinned-copper drain wire is provided. The listed fire-performance references include circuit integrity, mechanical shock, water-spray, flame propagation, halogen-free and low-smoke tests.
KEY FEATURES
- Basic design to BS 7629-1.
- 300/500V rated voltage.
- Solid Class 1 or stranded Class 2 copper conductors to IEC/EN 60228.
- Fire-resistant silicone-rubber insulation type EI2.
- Aluminum/polyester overall screen with tinned-copper drain wire.
- LSZH outer sheath: thermoplastic LTS3; thermosetting SW2-SW4 can be offered.
- Operating temperature: -30°C to +90°C.
- Installation temperature: -20°C to +50°C.
- Minimum bending radius: 6 × overall diameter.
- Available in 2, 3, 4, 7, 12 and 19 cores.
APPLICABLE SYSTEM STANDARDS
BS 7629-1 is the cable’s basic design standard. The same cable family is intended for use in the following building life-safety systems:
Standard | System Application |
BS 5266-1 | Emergency lighting of premises |
BS 5839-1 | Fire detection and fire alarm systems in and around buildings |
BS 5839-8 | Voice alarm systems |
BS 5839-9 | Emergency voice communication systems |
CABLE CONSTRUCTION
Voltage Rating | 300/500V |
Conductors | Plain annealed copper; solid IEC/EN 60228 Class 1 or stranded Class 2 |
Insulation | 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 |
CPC / Drain Wire | Uninsulated tinned copper conductor of 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 | Orange; other colours on request |
PRODUCT APPLICATIONS
- Emergency lighting systems in premises.
- Fire detection and fire alarm systems in and around buildings.
- Voice alarm systems.
- Emergency voice communication systems.
- Fire-resistant control and signalling circuits requiring overall screening.
- Building life-safety systems requiring LSZH cable and documented circuit integrity.
| Cores | Cross Section mm² | Insulation mm | Sheath mm | Overall Diameter mm | Approx. Weight kg/km |
|---|---|---|---|---|---|
| 2 | 1.0 | 0.6 | 0.9 | 7.1 | 80 |
| 2 | 1.5 | 0.7 | 0.9 | 8.0 | 95 |
| 2 | 2.5 | 0.8 | 1.0 | 9.4 | 135 |
| 2 | 1.5 | 0.7 | 0.9 | 8.4 | 106 |
| 2 | 2.5 | 0.8 | 1.0 | 9.9 | 145 |
| 2 | 4.0 | 0.8 | 1.1 | 11.5 | 210 |
| 3 | 1.0 | 0.6 | 0.9 | 8.0 | 95 |
| 3 | 1.5 | 0.7 | 0.9 | 8.5 | 115 |
| 3 | 2.5 | 0.8 | 1.0 | 10.0 | 170 |
| 3 | 1.5 | 0.7 | 0.9 | 8.9 | 134 |
| 3 | 2.5 | 0.8 | 1.0 | 10.3 | 180 |
| 3 | 4.0 | 0.8 | 1.1 | 12.2 | 260 |
| 4 | 1.0 | 0.6 | 1.0 | 8.3 | 115 |
| 4 | 1.5 | 0.7 | 1.0 | 9.4 | 150 |
| 4 | 2.5 | 0.8 | 1.1 | 11.0 | 210 |
| 4 | 1.5 | 0.7 | 1.0 | 9.8 | 166 |
| 4 | 2.5 | 0.8 | 1.1 | 11.8 | 250 |
| 4 | 4.0 | 0.8 | 1.2 | 13.5 | 330 |
| 7 | 1.0 | 0.6 | 1.0 | 10.0 | 165 |
| 7 | 1.5 | 0.7 | 1.1 | 11.3 | 225 |
| 12 | 1.0 | 0.6 | 1.1 | 12.5 | 255 |
| 12 | 1.5 | 0.7 | 1.2 | 14.5 | 350 |
| 19 | 1.0 | 0.6 | 1.2 | 15.0 | 380 |
| 19 | 1.5 | 0.7 | 1.3 | 17.0 | 520 |
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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, insulated with fire-resistant silicone rubber, cabled with fillers, screened with aluminum/polyester tape and tinned-copper drain wire, and finished with the specified LSZH sheath.
Inspection
Inspection focuses on conductor construction, silicone-rubber insulation, screen continuity, drain/CPC arrangement, sheath integrity, dielectric test, insulation resistance, dimensions 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 core count, conductor size, length and project reference.
Shipping
Before shipment, cable drums and 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
Which system standards are associated with this cable?
BS 5266-1, BS 5839-1, BS 5839-8 and BS 5839-9 are listed for emergency lighting, fire alarm, voice alarm and emergency voice communication system applications.
What insulation is used?
Fire-resistant silicone-rubber compound type EI2.
What is the overall screen?
Aluminum/polyester tape with tinned-copper drain wire.
What is the minimum bending radius?
6 times the overall cable diameter.
What is the listed short-circuit temperature?
350°C.
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