Plug enough into one extension lead and something is going to get warm. Usually it is the lead itself, not whatever you plugged in.

What Actually Matters When Choosing an Extension Lead

Every UK extension lead is built around the same limit: a standard 13A socket outlet, wired to BS 1363, tops out at 3120W (13A x 240V) per socket, and the lead itself has a total current rating that all connected devices share. A 4-gang Masterplug lead does not give you four independent 13A circuits, it gives you one 13A supply split four ways. Add up the wattage of everything you plan to run off it before you buy on gang count alone.

For most rooms, that math never gets close to the limit: a phone charger, a lamp and a laptop charger together barely register. Where it matters is workshops, garages and kitchens, where a kettle, a heater and a power tool can realistically be on the same lead at once.

Standard vs Surge-Protected: Do You Actually Need It?

Honestly, for a lamp and a phone charger, no. A basic Masterplug lead is perfectly fine for low-value, low-sensitivity devices. Where surge protection earns its keep is anything with a processor you would be annoyed to replace: a laptop, a games console, a smart TV, or networking kit that stays plugged in permanently.

A surge-protected model like the SWSRG4210N clamps voltage spikes, typically from things switching on and off elsewhere on the same circuit or supply fluctuations, before they reach the device. It will not do anything for a direct lightning strike on the property, but for the everyday spikes that quietly shorten the life of electronics, it is a sensible few pounds extra on anything permanent.

Standard flat leads suit most rooms, but if you need a supply routed further, browse the wider extension leads range or the trailing sockets collection for reel and multi-way formats built for garages, workshops and outbuildings.

Masterplug's Range at a Glance

How Long a Lead Do You Actually Need

Buy for the actual run, not the room size. A 2m lead is enough for a desk or a media unit sitting near a socket. Anything crossing a room, reaching a shed at the end of a garden in Nottingham, or running to the far end of a garage needs a cable reel like the LDCC2513/4BL rather than a standard flat lead, both for length and because reels are built with heavier-gauge cable for sustained outdoor or workshop use.

One thing worth knowing: cable reels should always be fully unwound when carrying a real load. A coiled reel under load traps heat in the cable, which is a common cause of reels overheating during garden or power tool use.

The Daisy-Chaining Mistake Everyone Makes

Plugging one extension lead into another to reach further is the single most common way people overload a circuit without realising it, and it is specifically against Electrical Safety First's guidance on extension lead use. Two 4-gang leads chained together look like 8 sockets, but they are still drawing through one 13A supply at the wall, and the joint between the two leads is a weak point that was never designed to carry sustained load.

Buying one longer or higher-gang lead in the first place costs a few pounds more than the cheapest short lead, but it is considerably cheaper than the alternative: a scorched socket, a tripped circuit mid-task, or in the worst case a cable fire from a joint that got warm and stayed that way unnoticed.

Frequently Asked Questions