BS 7629-1 450/750V sR Insulated Fire Resistant Control Cable
BS 7629-1 450/750V sR Insulated Fire Resistant Control Cable is a stranded-copper, silicone-rubber insulated and LSZH sheathed control cable for general power-supply and signal wiring, emergency circuits and fire-circuit control. Available in 2- to 5-core constructions, it is designed around fire-resistant circuit performance while retaining a compact, unscreened multicore construction.
PRODUCT OVERVIEW
The cable is basically designed to BS 7629-1 and uses plain annealed copper conductors stranded to IEC/EN 60228 Class 2. Each conductor is insulated with fire-resistant silicone-rubber compound type EI2, after which the cores are laid together in concentric layers with suitable non-hygroscopic fillers and covered by an LSZH outer sheath.
The design is intended for control and power-supply circuits where fire survival, low-smoke performance and reduced corrosive gas emissions are important. Compared with the screened 450/750V version, this product omits the overall aluminum/polyester screen and drain wire, giving a simpler unscreened construction for circuits that do not require electrostatic-noise screening.
KEY FEATURES
- Basic design to BS 7629-1.
- 450/750V rated voltage.
- Plain annealed copper conductor, stranded IEC/EN 60228 Class 2.
- Fire-resistant silicone-rubber insulation type EI2.
- Thermoplastic LSZH outer sheath type LTS3; thermosetting SW2-SW4 can be offered.
- Unscreened multicore construction.
- Available in 2-, 3-, 4- and 5-core versions.
- Available conductor sizes: 1.5 mm², 2.5 mm² and 4.0 mm².
- Operating temperature: -30°C to +90°C.
- Installation temperature: -20°C to +50°C.
- Minimum bending radius: 7.5 × overall diameter.
CABLE CONSTRUCTION
Voltage Rating | 450/750V |
Conductor | Plain annealed copper, stranded IEC/EN 60228 Class 2 |
Insulation | Fire-resistant silicone-rubber compound type EI2 |
Cabling | Cores cabled together in concentric layers with suitable non-hygroscopic fillers |
Outer Sheath | Thermoplastic LSZH LTS3; optional thermosetting LSZH SW2-SW4 |
Sheath Colour | Red; other colours on request |
STANDARD BASIS & FIRE PERFORMANCE
BS 7629-1 is the basic design standard identified for this cable. The product also lists a broad fire-performance framework covering circuit integrity, mechanical shock, water spray, flame propagation, halogen content, smoke emission and toxic-gas performance.
Performance | Referenced Test / Standard |
Circuit integrity | IEC 60331-21; BS 6387 CWZ; DIN VDE 0472-814 (FE180); BS 8434-1 (30 min); BS 5839-1 Clause 26 2d; CEI 20-36/2-1; SS229-1; NBN C 30-004 (F3); NF C32-070-2.3 (CR1) |
Circuit integrity with mechanical shock | EN 50200 (PH60); CEI 20-36/4-0 |
Circuit integrity with mechanical shock & water spray | EN 50200 Annex E |
System circuit integrity | DIN 4102-12, E30 depending on lay system |
Flame retardance – single vertical wire | EN/IEC/BS EN 60332-1-2 and listed equivalents |
Reduced fire propagation – bundled cables | EN/IEC/BS EN 60332-3-24 (Cat. C) and listed equivalents |
Halogen free | IEC 60754-1 and listed equivalents |
No corrosive gas emission | IEC 60754-2 and listed equivalents |
Minimum smoke emission | IEC 61034-1&2 and listed equivalents |
No toxic gases | NES 02-713; NF C 20-454 |
PHYSICAL, THERMAL & ELECTRICAL PROPERTIES
Operating Temperature | -30°C to +90°C |
Installation Temperature | -20°C to +50°C |
Minimum Bending Radius | 7.5 × overall diameter |
Dielectric Test | 2500 V r.m.s. × 5 min (core/core) |
Insulation Resistance | ≥300 MΩ·km at 20°C |
Short-Circuit Temperature | 350°C |
Conductor Operating Temperature | 90°C |
Ambient Temperature for Current-Carrying Table | 30°C |
PRODUCT APPLICATIONS
- General power-supply control circuits.
- Signal wiring.
- Emergency-circuit control.
- Fire-circuit control.
- Building-services and industrial control circuits requiring LSZH materials.
- Fixed multicore installations where overall electrostatic screening is not required.
The listed range covers 2- to 5-core constructions in 1.5 mm², 2.5 mm² and 4.0 mm² conductor sizes. As conductor size and core count increase, the cable overall diameter and approximate mass increase accordingly.
| No. of Cores × Cross Section | Insulation mm | Sheath mm | Overall Diameter mm | Approx. Weight kg/km |
|---|---|---|---|---|
| 2x1.5 | 0.8 | 1.0 | 7.8 | 96 |
| 2x2.5 | 0.9 | 1.1 | 9.2 | 138 |
| 2x4.0 | 0.9 | 1.2 | 10.5 | 189 |
| 3x1.5 | 0.8 | 1.0 | 8.3 | 115 |
| 3x2.5 | 0.9 | 1.1 | 9.8 | 169 |
| 3x4.0 | 0.9 | 1.2 | 11.6 | 246 |
| 4x1.5 | 0.8 | 1.1 | 9.3 | 147 |
| 4x2.5 | 0.9 | 1.2 | 11.3 | 222 |
| 4x4.0 | 0.9 | 1.3 | 12.5 | 299 |
| 5x1.5 | 0.8 | 1.1 | 10.5 | 180 |
| 5x2.5 | 0.9 | 1.2 | 12.3 | 259 |
| 5x4.0 | 0.9 | 1.3 | 14.0 | 359 |
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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
Class 2 stranded copper conductors are insulated with fire-resistant silicone rubber, laid up with suitable non-hygroscopic fillers and finished with the specified LSZH outer sheath.
Inspection
Inspection focuses on conductor construction, insulation quality, core identification, sheath condition, dielectric test, insulation resistance, overall 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 type, voltage, conductor size, core count, length and project reference.
Shipping
Before shipment, drums and accompanying technical documents are checked against the purchase order and packing list. Test reports, inspection records and product identification can be prepared according to project requirements.
Frequently Asked Questions
What conductor class is used?
IEC/EN 60228 Class 2 stranded copper conductors.
What insulation is used?
Fire-resistant silicone-rubber compound type EI2.
Is this cable screened?
No. This product is an unscreened multicore fire-resistant control cable.
What is the minimum bending radius?
7.5 times the overall cable diameter.
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Contact Information
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