H07RN-F 3 and 5 CORE heavy duty rubber cable

If you already have the connectors and just need the right cable, this is our go-to H07RN-F heavy duty rubber cable for professional temporary power and general site use. It’s ideal for making extension leads, short adaptor tails, repairs, replacements, and custom builds where you want cable you can trust rather than “mystery spec” flex.

Proper cable, built for real use

H07RN-F is widely used across temporary power, workshops and sites because it’s flexible, tough and hard wearing. The rubber sheath stands up well to regular coiling, dragging and day-to-day knocks, and it’s a solid choice for indoor or outdoor work where conditions are not always perfect.

This cable is manufactured to the relevant harmonised standards, and is UV resistant and flame retardant, making it a dependable option for professional use.

Choosing the right size (2.5mm² vs 6mm²)

2.5mm² is a great all-round choice for lighter duty and typical 16A style builds where you want a cable that’s still very flexible and easy to handle.
6mm² is the step up when you want more headroom and lower voltage drop, particularly on longer runs or higher load setups where cable performance matters.

If you tell us what you’re powering and the length you’re planning, we can point you to the best option.

Suitable for temporary systems

For temporary installations, BS 7909 points you towards using heavy duty rubber cable (H07RN-F or equivalent) and using cable where the specification and conductor size can be verified. For general electrical work, always ensure the finished assembly and application meet the requirements of BS 7671.

Need us to build it into a finished lead?

Need something specific? Check out our custom cable option so you can tell us the exact length and connectors you want and we’ll build it for you, fully tested.

Key specs

• Cable type: H07RN-F heavy duty rubber cable

• Conductor size options: 2.5mm² or 6mm²

Standards: EN 50525-2-21, EN 60228, flame retardant to IEC/EN 60332-1-2, UV resistant

• Supplied as cable only (no connectors fitted)

• Note: assembly should be carried out by a competent person, and finished leads should be tested before use