Electrical
Best Extension Leads for Workshops UK 2026
Key Takeaways
- MDee RCD Extension Lead - best overall for workshops: RCD + surge protection, 5m reach, flame-retardant housing at £15.95
- 4-Way Heavy Duty 5m - cheapest option at £13.59 with 4.9-star rating, ideal if you don't need RCD built in
- Innvodt 6-Gang RCD - most outlets (6 sockets) with MCB breaker, good for crowded benches
- 4-Way Surge Protector with USB - best value surge-protected lead with 12,941 reviews proving reliability
- 5M Surge Protected with USB-C - premium pick with USB-C charging for phones and tablets on the bench
- Suggested reading: Cordless drill battery care · Workshop tool maintenance
A blown fuse or a nasty shock is usually what finally convinces a maker to sort out their workshop power setup. The problem is that most garages and sheds in the UK have a single 13A socket on the wall, and running a cordless drill charger, work light, soldering station and dust extractor off one outlet is a recipe for tripped breakers at best and a fire at worst.
The right extension lead fixes this. Not just any strip from the kitchen drawer - a proper workshop-grade lead with RCD protection, surge suppression and cable rated for the job. We compared six of the best options available on Amazon UK right now, covering budget picks through to RCD-protected leads with USB charging.
Comparison Table
| Product | Price | Rating | Sockets | Cable | RCD | Surge | Best For |
|---|---|---|---|---|---|---|---|
| MDee RCD 4-Way | £15.95 | 4.6 ★ (114) | 4 | 5m | ✅ | ✅ | Overall best |
| 4-Way Heavy Duty 5m | £13.59 | 4.9 ★ (63) | 4 | 5m | ❌ | ❌ | Budget pick |
| Innvodt 6-Gang RCD | £15.95 | 4.6 ★ (26) | 6 | 3m | ✅ | ✅ | Most outlets |
| 4-Way Surge + USB | £14.98 | 4.7 ★ (12,941) | 4 | 1.8m | ❌ | ✅ | Best value |
| 5M Surge + USB-C | £22.99 | 4.6 ★ (1,554) | 4 | 5m | ❌ | ✅ | USB-C charging |
| Tower 8-Outlet + USB | £22.99 | 4.6 ★ (89) | 8 | 3m | ❌ | ✅ | Maximum sockets |
In-Depth Reviews
MDee RCD Extension Lead 4-Way 5m
£15.95
The MDee hits the workshop sweet spot: four 13A sockets, built-in RCD protection that trips at 30mA leakage in under 0.1 seconds, and surge suppression to keep your electronics safe from mains spikes. The 5-metre cable reaches from wall socket to workbench without stretching, and the flame-retardant yellow housing is easy to spot on a cluttered floor - no more tripping over a black lead in a dark garage.
The RCD plug is the key differentiator here. Most UK garages and sheds don't have RCD-protected circuits, which means a fault in a power tool or damaged cable could deliver a fatal shock. The MDee's built-in RCD eliminates that risk without needing an electrician to upgrade your consumer unit. It also has MCB (miniature circuit breaker) protection at 13A, so it cuts power if you overload it - handy when you accidentally plug the drill charger and the bench grinder into the same strip.
Pros: RCD + surge protection in one unit, 5m reach, flame-retardant, visible yellow colour, MCB overload cutoff
Cons: Only 3m cable on some variants (check before buying), no USB ports
4-Way UK Heavy Duty Extension Lead 5m
£13.59
At under fourteen quid, this is the cheapest 5-metre workshop lead we found with a genuinely impressive 4.9-star rating across 63 reviews. It's a straightforward four-gang, 13A lead with fire-retardant housing and wall-mountable design - no RCD, no surge protection, no USB. Just four sockets and 5 metres of 1.25mm² cable.
For a workshop where the existing consumer unit already has RCD protection (or where you've fitted an RCD adapter at the wall socket), this does the job cleanly. The wall-mountable design means you can fix it to a stud or workbench leg and keep it off the floor. The fire-retardant housing is rated to UL94 V-0, which means it self-extinguishes within 10 seconds if it catches fire - a meaningful safety feature for a lead sitting next to sawdust.
Pros: Cheapest option, excellent rating, wall-mountable, fire-retardant, 5m cable
Cons: No RCD or surge protection, no individual socket switches, basic design
Innvodt 3M 6-Gang RCD Extension Lead
£15.95
Six sockets in a single lead with RCD protection and MCB breaker - the Innvodt is built for crowded workshops where every surface already has a tool plugged in. The 3-metre cable is shorter than the MDee, which limits reach, but the extra two outlets mean you can power the soldering station, work light, phone charger, glue gun and dust extractor without swapping plugs mid-project.
The 30mA RCD trips in under 0.04 seconds, faster than the MDee's 0.1-second claim, and the MCB cutoff is rated at 13A with overload protection. The housing is flame-retardant ABS and the cable is 1.25mm² - adequate for the loads it's rated to carry. The shorter 3m cable is the main compromise: if your wall socket is more than 3 metres from your bench, this won't reach without an additional lead (which defeats the purpose).
Pros: 6 sockets (most in this roundup), RCD + MCB protection, compact design
Cons: Only 3m cable, no surge protection, heavier than 4-gang leads
4-Way Surge Protector Extension Lead with USB
£14.98
With nearly 13,000 ratings and a 4.7-star average, this is the most battle-tested lead in the roundup. Four individually switched AC outlets plus four USB-A ports (two per side) make it a versatile choice for a maker bench where you're charging phones, tablets and 3D printers alongside power tools.
The 1.8-metre braided cable is shorter than the workshop leads above, which limits its reach from wall to bench. But the braided nylon outer is significantly tougher than standard PVC - it resists kinks, cuts and abrasion from workshop floors. Surge protection is rated at 1,800 joules, enough to absorb moderate mains spikes. There's no RCD, so you'll need that protection at the wall socket or consumer unit.
Pros: 12,941 reviews prove reliability, individual socket switches, USB-A charging, braided cable, 1,800J surge protection
Cons: Only 1.8m cable, no RCD, USB-A only (no USB-C)
Extension Lead 5M 4-Way Surge Protected with USB-C
£22.99
The most expensive lead here, but the only one with USB-C charging - increasingly useful on a maker bench where phones, tablets and even some 3D printers charge via USB-C. Five metres of braided cable with four individually switched AC outlets and a mix of USB-A and USB-C ports.
The surge protection is rated at 1,800 joules with a response time under 25 nanoseconds, which is genuinely fast for a consumer-grade lead. The braided nylon cable is the same 5-metre length as the MDee, so it reaches from wall to bench. The main premium here is the USB-C port - if you're charging a modern phone or tablet while working, this saves you from needing a separate USB-C charger cluttering the bench.
Pros: USB-C charging, 5m braided cable, individual switches, fast surge response, 1,554 reviews
Cons: Most expensive at £22.99, no RCD protection, heavier than basic leads
Tower Extension Lead 3M 8-Outlet + USB
£22.99
Eight AC outlets and four USB ports (two USB-A, two USB-C) in a tower design that stands upright on the floor or bench. The tower form factor keeps plugs accessible and prevents cables tangling - a real advantage when you've got six or seven devices plugged in at once. The 3-metre cable limits reach, but the tower design means it sits neatly beside a workbench rather than sprawling across the floor.
At £22.99 it matches the USB-C lead on price but doubles the AC outlet count. If you run a lot of kit simultaneously - chargers, lighting, soldering iron, small power tools - the eight outlets give you room to grow. There's no RCD or surge protection built in, so pair it with a wall-mounted RCD adapter if your circuit doesn't have one.
Pros: 8 AC outlets (most here), tower form factor, USB-A and USB-C, neat bench-friendly design
Cons: Only 3m cable, no RCD or surge protection, tower can tip if overloaded on one side
Buying Guide: Choosing an Extension Lead for Your Workshop
RCD Protection Is Non-Negotiable
If your workshop is in a garage, shed or outbuilding, the circuit feeding it probably doesn't have RCD (residual current device) protection built in. UK Building Regulations Part P recommends RCD protection for all outdoor and garage circuits, but many older properties were wired before this requirement. An RCD extension lead is the cheapest way to add that protection without calling an electrician. It monitors the current flowing through the live and neutral wires and cuts power in under 0.1 seconds if it detects a leak - fast enough to prevent a fatal shock.
Cable Length and Thickness Matter
Longer cables cause more voltage drop under load, which can damage motors and reduce tool performance. For a workshop, 3 to 5 metres is ideal. If you need more reach, use a shorter lead to a central distribution point and run separate cables from there. Look for cable thickness of at least 1.25mm² for a 13A lead - thinner cable overheats under sustained load. The British Standard BS 1363 requires 13A plugs on 1.25mm² cable minimum.
Surge Protection vs RCD Protection
These do different things and you ideally want both. Surge protection guards your electronics (soldering stations, oscilloscopes, phone chargers) against voltage spikes from lightning or mains switching. RCD protection guards you against electric shock. The MDee RCD lead is the only product in this roundup that includes both in a single unit.
USB Ports Are Increasingly Useful
Modern maker benches charge phones, tablets, wireless headphones and sometimes even small 3D printers via USB. A lead with USB-A and USB-C ports eliminates the need for separate chargers. The USB-C port on the 5M Surge Protected lead delivers enough power for most phones and tablets.
Never Daisy-Chain Extension Leads
Connecting two extension leads together doubles the resistance and increases fire risk, especially under heavy load. If one lead doesn't reach, get a longer one or install an additional wall socket. The total current draw across both leads can easily exceed what a single 13A plug can safely handle, and the extra connections introduce more points of failure.
FAQ
Do I need an RCD extension lead for my workshop?
Yes, if your workshop has a UK socket without built-in RCD protection (most garages and sheds do not). An RCD extension lead cuts power in under 0.1 seconds if it detects earth leakage above 10mA, preventing fatal electric shock. The Building Regulations Part P recommends RCD protection for all outdoor and garage circuits.
What amp rating should a workshop extension lead have?
For most UK workshops, a 13A (3,250W) extension lead covers everything from power tools to lighting. If you run a large bandsaw, planer thicknesser or multiple tools simultaneously, look for a 16A industrial lead. For typical DIY workshops with one or two cordless tool chargers and a work light, 13A is more than enough.
Can I use a normal extension lead in a garage?
You can, but a standard indoor extension lead is not rated for the temperature extremes, moisture and physical abuse a garage workshop dishes out. Workshop-grade extension leads use thicker cable (1.25mm² or 1.5mm²), flame-retardant housing and often include surge protection. If your garage is damp or unheated, an RCD-rated lead with IP44 or higher is the safer choice.
How long should an extension lead be for a workshop?
3 to 5 metres is the sweet spot for most workshops. Longer leads (10m+) cause voltage drop under load, which can damage motors. If you need to reach across a large workshop, use a shorter lead to a central power point and run tool-specific cables from there. Cable reels should be fully unwound when carrying load to prevent heat buildup.
What is the difference between surge protection and RCD protection?
Surge protection guards your devices against voltage spikes from lightning or mains fluctuations. RCD protection guards you against electric shock by cutting power when it detects current leaking to earth. For a workshop, you want both. RCD protects the person, surge protection protects the tools.
Is it safe to daisy-chain extension leads in a workshop?
No. Daisy-chaining two extension leads doubles the resistance and increases fire risk, especially under heavy load. The total cable length adds up and causes voltage drop. Use one properly rated extension lead and, if you need more sockets, choose a lead with more outlets rather than connecting two together.
Final Verdict
For most UK workshops, the MDee RCD Extension Lead at £15.95 is the clear winner. It's the only lead in this roundup that combines RCD protection, surge protection and a 5-metre reach in a single unit. The built-in RCD means you don't need to worry about whether your garage circuit has protection - this lead provides it regardless.
If your circuit already has RCD protection and you just need more outlets, the Tower 8-Outlet lead gives you the most capacity. And if budget is tight, the 4-Way Heavy Duty at £13.59 with a 4.9-star rating is a no-frills workhorse that does exactly what it says.
Whatever you choose, check that your workshop circuit has RCD protection at the consumer unit. If it doesn't, an RCD extension lead like the MDee or Innvodt is the cheapest way to add that safety net without rewiring.
Disclosure: MakerUK earns a commission on purchases made through Amazon affiliate links on this page. This does not affect our editorial independence or the products we recommend. We only recommend products we'd genuinely use in our own workshops.