BS 7629-1 Fire Resistant Screened Control Cable 300/500V
BS 7629-1 Fire Resistant Screened Control Cable is a 300/500V mica-and-silicone-rubber insulated, overall-screened LSZH control cable for circuits that must retain functionality during fire conditions. The construction combines copper conductors, fire-resistant insulation, aluminum/polyester screening with tinned-copper drain wire and a low-smoke zero-halogen sheath.
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.
BS 7629-1 is the basic design reference for this cable. The range includes 2-, 3-, 4-, 7-, 12- and 19-core constructions, with solid or stranded copper conductors depending on the size and cable code. The design also incorporates dedicated circuit-protective conductors or drain wires according to core count, together with specified colour coding and fire-performance characteristics.
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.
- Basic design to BS 7629-1.
- 2-, 3-, 4-, 7-, 12- and 19-core configurations.
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
- Fire-resistant control circuits requiring maintained circuit integrity.
- Emergency lighting circuits.
- Fire detection and fire alarm systems.
- Voice alarm systems.
- Emergency voice communication systems.
- Building and infrastructure projects requiring screened LSZH control cable.
CONSTRUCTION PARAMETERS
| 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 conductor class, mica/silicone 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 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 is the rated voltage?
300/500V.
What is the basic design standard?
BS 7629-1.
What conductor classes are available?
Solid Class 1 and stranded Class 2 copper conductors to IEC/EN 60228.
What type of screen is used?
Aluminum/polyester tape with tinned-copper drain wire.
Is the sheath LSZH?
Yes. Thermoplastic LSZH LTS3 is specified, with thermosetting LSZH SW2-SW4 available as an option.
What is the listed minimum bending radius?
7.5 times the overall cable diameter.
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