Ultra Heavy Duty IP44 16 Amp CEE Extension Lead with 4mm2 Cable

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

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

This 4 mm² 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 4 mm² 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

• 4 mm² 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 30 m showed only 2 % drop under 1.5 kW load
• Length options: available from 10 m to 75 m
• Safe continuous use: full 16 A rating up to 50 m

Why Choose 4 mm² for 16 A Loads?

For distances over 30 m, 2.5 mm² cables can suffer from voltage-drop and heat build-up. Our 4 mm² version ensures:

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

Voltage-Drop Performance & Load Ratings

*Close to UK limit — use supervised loads or consider 6 mm² for continuous 18 A.

Trusted by Professionals

• Tool-hire and plant companies
• Construction and civil engineering sites
• Mobile generator setups
• Caravan and EV power extensions
• Stage, lighting & festival infrastructure

Choosing the Right Cable Size

HDIUK manufactures a complete range of 16 A Arctic-grade extension leads to suit every distance and application:

• 1.5 mm² – Standard Duty: ideal for everyday use on campsites, gardens and workshops.
  • 5 m 16 A Arctic Blue Extension Lead (1.5 mm²)
  • 10 m 16 A Arctic Blue Extension Lead (1.5 mm²)
  • 15 m 16 A Arctic Blue Extension Lead (1.5 mm²)
  • 20 m 16 A Arctic Blue Extension Lead (1.5 mm²)
• 2.5 mm² – Heavy Duty: for medium-length or higher-load equipment. View 2.5 mm² 16 A Extension Lead.
• 4 mm² – Ultra Heavy Duty: designed for extended runs up to 75 m or power-critical industrial applications (this model).

All HDIUK extension leads are built in the UK using Arctic-grade HO7RN-F cable and IP44 weatherproof CEE connectors, ensuring reliability and safety in all conditions.

Order now from MotorCables UK — trusted by trade users nationwide.

Disclaimer: All technical data, ratings, and compatibility information are supplied for guidance only. While every effort is made to ensure accuracy, HDIUK Ltd accepts no liability for minor discrepancies arising from manufacturing or specification changes.