Extension Cord: Our 2026 Selection and Buying Advice
Choosing an extension cord is not simply a matter of picking the longest or cheapest option. An unsuitable model can become cumbersome, overheat if left coiled or fail to provide adequate protection in the garden. Whether you are a homeowner, DIY enthusiast, gardener or professional, the key considerations are the power requirements of your appliances, the environment in which the cord will be used and the number of connections you need.
Pitfalls to Avoid Before Buying
1. Confusing Length with Capacity
A long extension cord is not necessarily capable of powering every appliance. A 25- or 45-metre model must be fully unwound before use, particularly when connected to a lawn mower, hedge trimmer or electric barbecue. When left coiled, the cable cannot dissipate heat as effectively and may become dangerously hot.
Also check the maximum power rating specified by the manufacturer. A 16A extension cord at 230V is generally rated for approximately 3,500 to 3,680W, but this limit must never be exceeded. The combined power draw of all connected appliances must remain within the product’s specifications.
2. Using an Indoor Cable Outdoors
A cable designed for a living room or office is not built to withstand rain, splashes or damp conditions. An outdoor extension cord should feature a suitable design and, where required, an ingress protection rating such as IP44.
However, bear in mind that IP44 protects against water splashes, not immersion. Even with an IP44 extension cord, avoid puddles, areas liable to flooding and connections directly exposed to the elements.
3. Relying on Colour or the Number of Sockets
An orange sheath is easy to spot in grass, but its colour says nothing about the cable’s permitted power rating or durability. Similarly, a power strip extension allows you to connect several devices, but it does not increase the available power.
Instead, check the cable cross-section, cable type, presence of an earth connection and the safety instructions. The CE marking indicates a declaration of conformity with the applicable European requirements; on its own, it does not guarantee superior performance.
Technical Criteria to Check
Cable Type and Cross-Section
For most household applications, a HO5VV-F 3G1.5 mm² cable is a common solution for portable appliances and extension leads. The “3G” designation generally refers to three conductors, including the protective earth conductor.
The H07RN-F cable is designed for more demanding conditions and intensive use. It is particularly suitable for a garden extension cord powering a pump, pressure washer or outdoor equipment, provided the manufacturer’s limits are observed.
Earth Connection and Current Rating
For Class I appliances, choose an extension cord with an earth connection, generally recognisable by its 2P+E configuration. A nominal current rating of 16A is suitable for typical use on a 230V installation, within the maximum power limit specified on the product.
Avoid connecting several extension cords in series. This makes the load more difficult to assess and increases the risk of poor contact or tripping hazards along the route.
Length and Usage Environment
Choose a length suited to the actual distance:
- 1.5 to 3 m: desk, television, furniture positioned near a socket or confined space;
- 5 to 10 m: workshop, garage, patio or small garden;
- 25 to 45 m: large plot, work areas far from the building or maintenance of an extensive garden.
When used outdoors, keep connections dry, inspect the sheath regularly and store the cable without bending it at sharp angles.
Our Recommendations by Use Case
Zenitech Extension Cable 16A 2P+T HO5VV-F 3G1.5, 3 m
Why we recommend it: its 3 m length works equally well in a home, office or workshop, while the extra-flat plug slips neatly behind furniture.
The specifications list a 16A rating and an HO5VV-F 3G1.5 mm² cable. This model is intended for indoor use, so it should not be exposed to moisture.
A 3 m cable, 2P+T earth connection, extra-flat plug and advertised power capacity of up to 3,680W at 230V.
Baseus PowerCombo Cube: 3 sockets, 3 USB ports and 1 USB-C 20W port
Why we recommend it: its compact design sits neatly on a desk, bedside table or any space where several devices need to remain close at hand.
USB ports do not replace mains sockets: the three AC outlets and USB ports are clearly separated, helping to prevent unsuitable connections.
A 1.5 m cable, three USB-A ports and a USB-C port rated at 20W, with protection against surges, overloads and short circuits according to the product specifications.
Zenitech IP44 outdoor extension cord, H07RN-F 3G1.5 mm², 10 m
Why we recommend it: it is designed for garden tools, outdoor lighting and equipment such as pumps, where exposure to water splashes is possible.
Its IP44 rating and protective shutters set it apart from an indoor extension cord. Connections must nevertheless be kept dry and away from any standing water.
A 10 m H07RN-F 3G1.5 mm² cable, two 2P+T sockets with protective shutters and an advertised IP44 rating.
Need more options?
Browse our complete selection to compare lengths, sockets, cable types and indoor or outdoor applications.
Installation and Maintenance Advice
Before each use, inspect the sheath, plug and sockets. They should show no cuts, crushing or scorch marks. Fully unwind the cable and do not run it under a rug, beneath a door or through a frequently used walkway.
For an outdoor extension cord:
- use a suitable outdoor wall socket protected by an appropriate residual-current device;
- keep connections away from puddles and close the protective shutters when they are not in use;
- avoid leaving the cable unnecessarily exposed to sunlight, frost or damp conditions;
- store it carefully after use, without knots or excessively tight bends.
A USB-C extension cord or power strip with charging ports is suitable for phones, tablets and accessories. However, check the stated charging power. For a heating appliance or energy-intensive tool, use the mains socket and observe the permitted maximum power.
Frequently Asked Questions
What length should I choose for a garden extension cord?
Measure the distance between the socket and the work area, then allow a little extra length so the cable is not pulled taut. A 10 m cord is often sufficient for a patio or small garden. For a larger plot, a 25- or 45-metre garden extension cord will be more suitable.
Can an extension cord be left outdoors?
It is best to store it after every use. If it is designed for outdoor use, check its IP rating, cable type and the manufacturer’s recommendations. IP44 protection withstands water splashes, but does not protect against immersion or continuous exposure to rain.
Does a 16A extension cord use more electricity?
No. An extension cord itself consumes virtually no electricity. Consumption depends on the appliances connected to it. A greater length can, however, result in very minor power losses; the key is to stay within the rated power and fully unwind the cable.