HDIUK 16A Ultra Heavy Duty 4mm² Arctic-Grade Extension Lead

Up to 75m. Fully tested. Voltage drop data included. Built for professionals.

Ultra Heavy Duty, UK-Made, and Certified for Demanding Applications

This 4mm² extension cable is designed for power-critical environments where reliability and safety matter. Ideal for long-distance applications up to 75 metres, with real-world voltage drop performance measured and confirmed under load.

Introducing the HDIUK 4mm² Arctic-Grade CEE Plug to Coupler Extension Lead

This lead is built for serious industrial, construction, and event use. Manufactured in the UK and individually tested for polarity, insulation resistance, and earth continuity, it provides stable and safe current distribution without compromise.

Key Features:

• 4mm² Conductors: Lower resistance = less heat = longer, safer runs
• Individually Tested & Serialised: Earth, insulation and polarity certified
• Weatherproof IP44 Connectors: Built for year-round outdoor use
• Voltage Drop Tested: Live test at 30m showed only 2% drop under 1.5kW load
• Length Options: Available from 10m to 75m
• Safe Continuous Use: Full 16A rating up to 50m

Why Choose 4mm² for 16A Loads?

For distances over 30m, 2.5mm² cables often suffer from excessive voltage drop and overheating. Our 4mm² version ensures:

• Voltage stability on longer runs
• Compliance with UK wiring regs (max 5% voltage drop)
• Cooler running under load = safer operation

Voltage Drop Performance & Load Ratings

^*Max peak load calculated based on 5% voltage drop threshold. Intended for short-term use only.
^†Close to UK drop limit — recommended for supervised or temporary loads. Consider 6.0mm² for full 18A continuous use.

Trusted by Professionals

• Tool hire and plant companies
• Construction sites and civil engineers
• Mobile generator installations
• Caravan, EV, and off-grid power setups
• Stage, lighting and festival infrastructure

Order now from MotorCables UK — trusted by trade users across the UK.