2.5mm² 6701B Cable (H07Z-K) LSZH Grey Class 5 Flexible 450-750V LSZH-2.5-GREY-1

The LSZH-2.5-GREY-1 (product code: 6701b-h07z-k-lszh-cable-2-5-grey-100m) is a 2.5mm² 6701B LSZH cable (H07Z-K) rated 450/750V, supplied in grey as a 100m length — a single-core, Class 5 flexible panel wiring cable designed for safety-critical environments.

This 2.5mm² 6701B cable is ideal for wiring switchgear, instrument panels, metering equipment, and appliances where low smoke zero halogen properties are essential. Its LSZH cross-linked insulation ensures that in the event of a fire, toxic fumes and dense smoke are minimised — protecting both life and sensitive equipment. The flexible Class 5 copper conductor makes installation and termination straightforward, even in tight enclosures.

Key Features

• Low Smoke Zero Halogen (LSZH) Insulation: Cross-linked EI5 insulation dramatically reduces toxic fume and smoke emission during a fire, making it essential for enclosed or populated spaces.
• Class 5 Flexible Conductor: 50/0.25mm stranded plain annealed copper provides excellent flexibility, simplifying routing and termination in control panels and equipment.
• 450/750V Voltage Rating (H07Z-K): Suitable for a wide range of low-voltage power and control wiring applications.
• Temperature Range -15°C to +90°C: Performs reliably across demanding thermal environments.
• Approximate Overall Diameter 4.1mm: Compact profile with a minimum bending radius of just 3× overall diameter (approx. 12.3mm), ideal for dense panel layouts.
• BASEC Certified: Independently verified for quality and compliance, giving confidence in every metre.
• 100m Supply Length: Convenient reel size for panel builds and equipment wiring projects, weighing approximately 3.3kg.

Applications

This 6701B LSZH cable is specifically suited for internal wiring of appliances, switchgear panels, instrument panels, and metering equipment. It is widely used in environments where smoke and toxic fumes from burning cables could threaten life or damage sensitive equipment — including transport infrastructure, data centres, hospitals, commercial buildings, and industrial control systems. Its equivalent AWG size is 14 AWG, making it a useful crossover for international specifications.

Standards and Compliance

Manufactured to BS EN 50525-3-41 (formerly BS7211), Cenelec HD22.9, and tested to BS EN/IEC 60332-1-2 (flame propagation), BS EN 50267-2-1 (halogen acid gas), and BS EN/IEC 61034-1 (smoke density), with BASEC certification.

Supplied in grey, 100m length. Order code: 6701b-h07z-k-lszh-cable-2-5-grey-100m.

Frequently Asked Questions

What is the conductor stranding of this 2.5mm² 6701B LSZH cable?

The conductor comprises 50 strands of 0.25mm diameter plain annealed copper, with a radial insulation thickness of 0.8mm and an approximate overall diameter of 4.1mm.

What is the difference between 6701B (H07Z-K) and 2491B (H05Z-K) LSZH cable?

The key difference is the voltage rating: H07Z-K (6701B) is rated 450/750V, while H05Z-K (2491B) is rated 300/500V. Choose H07Z-K for higher voltage applications or where a greater insulation margin is required.

What is the minimum bending radius for this cable?

3× the overall diameter, which works out to approximately 12.3mm for this 2.5mm² size.

Can this cable be used in fire-sensitive environments?

Yes — its LSZH insulation is specifically designed for locations where smoke density and toxic gas emission must be minimised, tested to BS EN/IEC 61034-1 and BS EN 50267-2-1.

Where can I buy 2.5mm² 6701B Cable (H07Z-K) LSZH Grey Class 5 Flexible 450-750V LSZH-2.5-GREY-1 in the UK?

CSE Distributors, with branches in Wooburn Green and Southampton, supply this cable alongside a comprehensive range of electrical and industrial products. A family-run business with over 50 years' experience, CSE is backed by hundreds of positive customer reviews and offers same-day despatch with expert technical support.