Description
H05BN4-F 3 Core 2.5mm² Heat Resistant Cable
Heat-Resistant Cable for Immersion Heaters & High-Temperature Appliances
The H05BN4-F 3 Core 2.5mm² Heat Resistant Butyl Flexible Cable is designed for immersion heater connections and other high-temperature applications. With its durable butyl rubber insulation, it performs reliably in environments where heat, oil, and grease are present.
While most commonly used for immersion and storage heaters, this cable is also suitable for ovens, hobs, and cookers where a flexible, heat-resistant supply is required. Manufactured to ISO 9001 standards and compliant with EN 50525-2-21, it ensures long-lasting safety and reliability.
Key Features
- Immersion Heater Ready: Specifically suited for immersion and storage heater connections.
- Heat-Resistant Butyl Insulation: Withstands high operating temperatures.
- Flexible Construction: Easy to route and terminate in domestic and commercial environments.
- Oil & Grease Resistant: Reliable in kitchens and utility spaces.
- Certified Quality: ISO 9001 and EN 50525-2-21 compliant.
Core & Sheath Details
- Outer Sheath Colour: White
- Inner Core Colours: Brown, Blue, Green/Yellow
- Cable Diameter: 10.5 mm
- Electrical Resistance: 7.98 Ω/km
Immersion Heater & Cooker Cable Suitability – H05BN4-F 2.5mm
The H05BN4-F 2.5mm² cable is the standard choice for immersion heater wiring, where both flexibility and heat resistance are essential. It is also widely used for ovens, hobs, and cookers up to 16A (≈3.5kW).
⚠️ Note: Although rated to carry more, in practice this size is most often applied to appliances up to 16A. For higher-demand cookers, 4mm² or 6mm² cable may be required. Always follow the appliance manufacturer’s instructions, BS 7671 Wiring Regulations, and seek confirmation from a qualified electrician.
Learn more in our full guide: “Cable for Cooker – Practical Guide”
Browse cooker options: “Cooker Cables”
Browse immersion heater options: “Immersion Heater Cables’
Why Choose This Cable?
- Trusted choice for immersion heater connections.
- Heat, oil, and grease resistant for long-term reliability.
- Flexible for straightforward installation.
- Fully certified to UK and EU standards.
Why Buy From Electrical4Less?
- High-quality, certified cables for safe installations.
- Competitive pricing for trade and domestic use.
- Fast UK delivery to keep projects on schedule.
- Expert support with cable selection and guidance.
