Independent comparisons. We may earn from shop links. More info

Socket cube vs extension lead: wall holes or reach

Updated: 23 October 2026

The free socket is behind the sofa, and you are holding a lamp and a router. A socket cube vs extension lead decision is which shortage you have. A cube adds holes at the wall. A lead carries a socket across the room. Neither raises the 13 A limit you start from. The rows are the [socket cube comparison](/hub/sockets-and-extension-leads/socket-cube). Peter F., editor for DIY & tools, did not lab-test them. The fire wording is from London Fire Brigade, Scottish Fire and Rescue, and Which?, read on 21 October 2026. A qualifying purchase can earn a commission at no extra cost to you.

The free socket is behind the sofa, and you are holding a lamp and a router. A socket cube vs extension lead decision is which shortage you have. A cube adds holes at the wall. A lead carries a socket across the room.

Our top picks

Masterplug Masterplug MSWRG3-MP

Best overall

Masterplug Masterplug MSWRG3-MP
8.9/10about £8.25
View offer
NAEEM SONS NAEEM SONS cube

Best value

NAEEM SONS NAEEM SONS cube
8.7/10about £4.30
View offer
Status Status 1.4 m cube

Alternative

Status Status 1.4 m cube
7.5/10about £13.98
View offer
On this page
  1. 1.Holes at the wall, or metres of cable
  2. 2.What fire services say about cubes
  3. 3.A cube on a short lead
  4. 4.Do not stack them
  5. 5.When to stop buying adaptors

Holes at the wall, or metres of cable

If the flex reaches and you need another hole, buy a wall cube. The Masterplug at about £8.25 is three switched faces and no cable. The NAEEM at about £4.30 is the cheap single for a small plug. If the flex stops short, buy a lead. A wall cube will not add that metre. The cube can block the other half of a double socket: Masterplug reviews say you lose the spare outlet or one face of the adaptor. A 13 A lead and a 13 A cube share the same ceiling. Four gang sockets are not four circuits. The sum of the plates is on how to use a socket cube. A cube avoids a trip and adds plug weight at the wall. A lead does the opposite.

What fire services say about cubes

London Fire Brigade wants a fused extension, fuse in the cable, rather than a plug-in cube, and does not want a kettle, toaster and microwave together. That note has not scored the Masterplug. Which? quotes Tim Benham: a block is not automatically unsafe, plug weight can pull it out and heat the pins, unfused blocks are best avoided, and a proper lead is what he would rather see. Scottish Fire and Rescue wants a fuse and an approval mark, and would rather see a bar than a block. The check you can do today is whether a fuse is named, on the socket cube buying guide.
Masterplug Masterplug MSWRG3-MP

Testsieger

Masterplug Masterplug MSWRG3-MP
8.9/10about £8.25
View offer

A cube on a short lead

The Status S3W1.4M3XUSB1PK6, B07B6NNR1D, is three sockets and three USB ports on 1.4 m, at about £13.98 and 460 g. BS 1363-3 does not treat a plug and portable sockets on a flex as an adaptor, so this row is already a short lead. The plug field says Type B, with no Type G line, and no USB watts are printed. One review wanted about 50 cm more. Another said 1.4 m reached a short kettle flex. Use it for an arm’s length to a desk, not to cross a room. If 1.4 m is short, buy a fused lead of the length you measured.

Do not stack them

Electrical Safety First says one device per socket, and no daisy-chain. A cube in a lead puts both limits on one 13 A plug. LENCENT reviews call that cube awkward on a bar because it blocks the next socket. Aodeng reviews describe more than 3 inches of projection, and a unit that leaned out. Which? links that pull-out to heat. One cube or one lead, in one wall socket. Do not feed a toaster from a cube that is already on a four-gang bar. Keep the cube for the lamp and the router.

When to stop buying adaptors

When adaptors are how the room works, Electrical Safety First says fit more sockets. A cube fixes a spare charger. A lead fixes a sofa off the wall. In England and Wales a new socket is notifiable under Part P when it qualifies. No cube here has an IP rating, including the LENCENT row that mentions a bathroom. Choose a wall cube when the flexes reach and the load is a lamp and chargers: the Masterplug for switches, the NAEEM at about £4.30 for small plugs. Those two are on best socket cube UK. Choose a fused lead for distance, and the Status only if you measured 1.4 m. A cube rearranges one 13 A path. It does not add a point on the ring.

Common questions

Is a cube safer because there is no cable to trip on?
No cable means no trip. The 13 A limit remains, and the plugs’ weight sits on the wall. Which? quotes the heating that follows a pull-out. London Fire Brigade prefers a fused lead. Scottish Fire and Rescue prefers a bar. A cube can answer a hallway trip. It does not answer a kettle.
When is a lead the better buy?
When the flex does not reach. Measure first. A 13 A lead gives you that distance, the same ceiling as the wall, and a cable to route. It is what London asks for when you multiply ordinary sockets. If the lamp is already beside the socket, you only needed a cube.
Is the Status cube an extension lead?
It is a cube on 1.4 m, about £13.98, three sockets, three USB ports, 460 g. Under BS 1363-3 a plug and sockets on a flex are not an adaptor, so this is a short lead. The plug field says Type B. USB watts are missing. It serves a nearby desk. It is not a reel.
Why do fire services dislike block adaptors?
London wants a fused inline lead and separate high-load appliances. The Which? officer says unfused blocks are best avoided and that plug weight heats loose pins, while a block is not automatically unsafe. Scotland prefers a bar, with a fuse and an approval mark. The shared ask is a fused lead first, not a ban on every cube.
When is the answer a new wall socket instead?
When the adaptors would stay every day, when the room is a bathroom, or when a cube has run hot. Electrical Safety First then wants more sockets. In England and Wales a registered electrician does that under Part P when it is notifiable. A new socket adds a place to plug in. A cube only shares the path you have.

Related pages

Extension lead comparison

Socket cube

Best socket cube UK: switched mains, cheap, or USB

Socket cube buying guide: fuse, pins and real outlets

How to use a socket cube: the one shared 13 A path

Socket cube with USB: about 12 W, not a 65 W brick

Sources

Sources taken from the research digest. Listings were scored from stored amazon.co.uk rows. This page did not run a lab test.

  1. Electrical Safety First — block adaptors (retrieved 22.10.2026)
  2. Electrical Safety First — appliance ratings (retrieved 22.10.2026)
  3. Electrical Safety First — plugs and fuses (retrieved 22.10.2026)
  4. Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 22.10.2026)
  5. BSI, BS 1363-3:2023 (retrieved 22.10.2026)
  6. IET Wiring Matters — BS 7671 FAQ (retrieved 22.10.2026)
  7. NICEIC — bathrooms and electrics (retrieved 22.10.2026)