50m cable reel buying guide: cut-out, code, then load
Updated: 22 October 2026
A socket that will not reach the garden makes a 50 m drum look like the fix. A 50m cable reel buying guide is the order of checks before the brand, because a 13 A label and a bright sheath do not say what the reel can do while the cable is still coiled. The order comes from the nine amazon.co.uk listings in the [50m cable reel comparison](/hub/sockets-and-extension-leads/50m-cable-reel). We did not test the reels in a lab. A qualifying purchase can earn a commission at no extra cost to you. Who each model is for is on the [best 50m cable reel](/hub/sockets-and-extension-leads/50m-cable-reel/sub/50m-cable-reel-best) page.
A socket that will not reach the garden makes a 50 m drum look like the fix.
A socket that will not reach the garden makes a 50 m drum look like the fix. A 50m cable reel buying guide is the order of checks before the brand, because a 13 A label and a bright sheath do not say what the reel can do while the cable is still coiled. The order comes from the nine amazon.co.uk listings in the 50m cable reel comparison. We did not test the reels in a lab. A qualifying purchase can earn a commission at no extra cost to you. Who each model is for is on the best 50m cable reel page.
Our top picks
| Badge | Product | Cut-out | Cable code | Use stated | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  SLx SLx 90071PI | Yes | Not printed | Outdoor title | 8.4 | about £59.99 | View offer |
 Masterplug Masterplug Pro-XT OLU50134SL | Yes, manual reset | Not printed | Not stated | 8.6 | about £60.99 | View offer | |
| Alternative |  Brennenstuhl Brennenstuhl Standard 1098413 | Yes | H05VV-F 3G1.5 | Indoor | 7.8 | about £69.99 | View offer |
On this page
Start with the thermal cut-out and the wound rating
The first line to find is a thermal cut-out, and a wound rating beside the unwound rating. Electrical Safety First says not to use a reel with no clearly marked cut-out, and that wound current is typically as low as 3 A or 4 A. That figure is their typical rating, not a measurement of these nine drums. The 13 A mark is the load once the cable is fully off the drum, often 3,120 W at 240 V. UK mains are 230 V nominal. Listings often say 240 V. The fuse in the BS 1363 plug is not what protects a coiled drum under BS EN 61242.
The SLx user guide for the 30 m and 50 m family prints 960 W fully wound and 3,120 W fully extended. Desiretech’s bullets claim 13 A and 3,120 W with no derating over 50 m. That is a claim, not a wound measurement. If the drum in your hand prints a different figure, the label wins.
Read the cable code, not the colour
BEAMA’s checklist asks for a BS 1363 socket, a BS 1362 13 A fuse, and a sheath marked with a harmonised code and a cross-section. Above 2 m it expects 1.25 mm² or 1.5 mm². Only four reels here print a code, all H05VV-F 3G1.5: the Brennenstuhl Standard, the older Garant, and the two newer Garant drums. Brennenstuhl treats VV plastic as indoor cable and H07RN-F as outdoor and site cable. None of these nine prints H07RN-F. Desiretech, Status, IONOS, SLx, and the Masterplug leave the code blank. Green and yellow help you see the lead. They are not the harmonised mark.
Quote an indoor or outdoor limit you can point at
An indoor or outdoor limit is a sentence on the listing or in the manual, not the colour and not the word outdoor in a title. No listing here prints an IP rating. Desiretech, the Brennenstuhl Standard, and the older Garant say indoor use. The two newer Garant drums print H05VV-F and do not say indoor or outdoor. Status and IONOS put outdoor in the title and weatherproof in a highlight, with no IP code. The SLx title says outdoor, and its user guide says domestic use only and do not use it in damp or wet conditions. The Masterplug bullets do not state outdoor. The indoor drum set against the high-vis title is the indoor or outdoor cable reel page.
When the order says stop
Check the cut-out and wound figure, then a cable code, then a use sentence, then the shared 13 A plug. Buy 50 m only when the route is about that long. Call an electrician for a permanent shed supply, burn marks, an RCD that trips at once, or any plan to charge an electric vehicle from the reel.
Common questions
What should I check first on a 50 m cable reel?
Check for a thermal cut-out, then a wound rating next to the unwound 13 A figure. Electrical Safety First treats a missing cut-out as a reason not to use the reel, and puts a typical wound current at about 3 A or 4 A. That figure is not a test of these nine products. If the listing prints only the unwound watts, you still do not have a wound rating.
Does a 13 A label mean 13 A while the cable is still on the drum?
No. The 13 A mark, often 3,120 W at 240 V, is the rating once the cable is fully unwound. Cable left on the drum holds heat, and the fuse in the BS 1363 plug is not the protection for that coil. BS EN 61242 expects a thermal cut-out, a current cut-out, or a weak point in the reel itself. Desiretech’s no-derating bullet is a claim on that listing, not a measurement you can apply to the other drums.
Is a green or yellow sheath an outdoor rating?
No. High-visibility sheaths are there so you can see the lead. None of these nine amazon.co.uk listings prints an IP rating. An outdoor word in a title, or a weatherproof highlight, is not a code you can quote. If the only honest sentence is indoor, keep the reel indoors. Colour does not upgrade PVC flex to an outdoor rating.
Do four sockets mean four times 13 A?
No. Every socket on these reels shares one 13 A plug. Four shuttered outlets are four places to plug in, not four separate 13 A supplies. Add the watts of the tools that will run together and stay inside the unwound rating, and only after the cable is off the drum. Do not plug a second reel into the first. A spare socket is not spare capacity.
When is 50 m the wrong length?
When a shorter lead already reaches. A 50 m drum is about 6 kg, and you still have to unwind it for the full rating. If the job is a garage bench or a small lawn that 25 m covers, the extra cable is weight and rewind, not reach. Buy 50 m when the route really is about that long and you will pull the cable off. Otherwise the shorter reel is the better tool.
When should I stop shopping and call an electrician?
Call an electrician when the far end is a shed that needs power all year, when you see burn marks, when an RCD trips as soon as the reel is plugged in, or when the circuit is a workplace supply. A domestic reel is not a permanent installation, and it is not a charger for an electric vehicle. Those jobs sit outside a buying guide. The reel is for a temporary run you can unwind and put away.
Related pages
Sources
Sources taken from the research digest. Listings were scored from the stored amazon.co.uk pages. This page did not run a lab test.
- Electrical Safety First — Extension leads and cable reels (retrieved 22.10.2026)
- Electrical Safety First — Overloading sockets (retrieved 22.10.2026)
- Electrical Safety First — Garden (retrieved 22.10.2026)
- BSI — BS EN 61242 cable reels (retrieved 22.10.2026)
- SLx — 30 m and 50 m reel user guide (retrieved 22.10.2026)
- Brennenstuhl — Cable types (retrieved 22.10.2026)
- BEAMA — Extension lead safety checklist (retrieved 22.10.2026)
- HSE — INDG247 Maintaining portable electrical equipment (retrieved 22.10.2026)