6491B Single Core LSZH Cable | BS EN 50525-3-41 | 450/750V | Low Smoke Zero Halogen Fire-Safe Cable for Conduit & Fixed Installations
Overview
The 6491B Single Core LSZH Cable is a high-performance, fire-safe electrical cable engineered for 450/750 V applications. Manufactured to BS EN 50525-3-41 standards and BASEC Approved, with CE marking and backed by ISO 9001 quality management certification — this cable is widely trusted across South Africa’s commercial, industrial, infrastructure, and public-sector projects where fire safety, low smoke, and zero halogen performance are non-negotiable.
It is designed specifically for installation in conduit and for fixed, protected wiring. It excels in environments where fire, smoke spread, and toxic fumes would pose a serious risk to life and equipment — making it ideal for schools, hospitals, shopping centres, office blocks, airports, underground transport, data centres, and residential complexes throughout South Africa. In the event of a fire, 6491B cables emit very low smoke, no halogen gases, and minimal toxic fumes — keeping escape routes visible, reducing corrosion damage to sensitive electronics and infrastructure, and protecting both people and property.
Key Features & Construction
Conductor: Stranded copper — flexible yet robust, offering dependable conductivity and ease of installation.
Insulation & Sheath: LSZH (Low Smoke Zero Halogen) compound — flame-retardant, low-smoke, halogen-free.
Voltage Rating: 450/750 V.
Operating Temperature: -15°C minimum / 90°C maximum continuous.
Short Circuit Temperature: Up to 250°C — maintains integrity during fault conditions.
Minimum Bending Radius: 6× overall cable diameter — supports neat installation without damage.
Standards & Approvals:
BASEC Approved
CE Marked
Manufactured to BS EN 50525-3-41
ISO 9001 Quality Certified
Technical Specifications & Dimensions
Typical Applications
The 6491B range is the preferred choice for fixed wiring inside conduit and protected installations across South Africa, especially in buildings and spaces where fire safety is critical:
Commercial & Public Buildings: Offices, malls, schools, universities, hospitals, libraries, and public halls — where large numbers of people gather and safe evacuation is vital.
Transport & Infrastructure: Airports, railway stations, bus terminals, tunnels, and elevated walkways — LSZH cables reduce smoke and toxic gas exposure in enclosed or semi-enclosed spaces.
Industrial & Data Environments: Factories, control rooms, server rooms, and telecommunications hubs — protects expensive equipment from halogen-corrosion during fires.
Residential & Mixed-Use Developments: Blocks of flats, retirement villages, and hotels — meeting the latest South African fire safety expectations and building insurance requirements.
Health & Safety Priority Zones: Any installation where building regulations, insurer specifications, or project design require low-smoke, zero-halogen, flame-retardant wiring.
Why Choose 6491B LSZH Cable?
In South Africa, building design and electrical specifications increasingly demand wiring that limits harm during a fire. Standard PVC cables can release dense smoke and corrosive halogen fumes that obscure exits, damage equipment, and endanger lives — especially in high-rise or enclosed buildings.
The 6491B LSZH cable answers that need:
✅ Low Smoke: Visibility remains higher for longer during a fire — helping people escape and helping emergency services work.
✅ Zero Halogen: Releases no acid or corrosive gases — protecting critical infrastructure, IT systems, and electrical gear from secondary damage.
✅ Flame Retardant: Resists the spread of fire — meeting the requirements of BS EN 50525-3-41.
✅ Quality Assured: BASEC approval means independent, regular testing and compliance — giving engineers, buyers, and installers full confidence.
✅ Versatile Sizing: From lighting circuits (1.5 mm²) to heavier power runs (16 mm²) — one cable family covers most fixed-installation needs.
✅ Local Relevance: Widely specified in South African tenders, building projects, and public works where safety and compliance go hand-in-hand.
Installation Notes
Suitable for conduit, enclosed trunking, and protected fixed wiring — not intended for open, unprotected outdoor or direct-burial use without additional protection.
Temperature range supports reliable performance across South Africa’s varied climate — from cold highveld winters to hot summer conditions.
Stranded copper conductors make pulling into conduit easier than solid types, while still delivering excellent electrical performance.
Observe the 6× diameter minimum bend radius during installation to avoid insulation damage.
Compliance & Quality
BASEC Approved — independently certified safety and performance.
CE Marked — meets European conformity standards, widely accepted in South Africa.
BS EN 50525-3-41 — exact product standard for this LSZH cable type.
ISO 9001 — manufactured under certified quality management systems for consistent batch-to-batch quality.
Ordering & Supply
Available in six common sizes from 1.5 mm² to 16 mm², in standard coil lengths or cut precisely to your required length — reducing waste and speeding up your project. Multiple sheath colours simplify circuit identification and installation.
