How to set up a smart plug
Quick answer: Plug the smart plug into a wall socket, install its app, join your home Wi-Fi (usually the 2.4GHz network) following the app's steps, give the plug a name, then plug your lamp or appliance in and set schedules or voice controls. Do not use one with heaters unless the plug is rated for it.
A smart plug lets you switch a lamp, a Christmas tree or a fan on and off from your phone or on a timer. It is a handy way to make an ordinary lamp turn on at dusk, or to switch something off that you forgot.
Most setup problems are about the Wi-Fi: many plugs only work on the 2.4GHz band, not 5GHz.
What you will need
- A smart plug rated 13A (or 10A, check the load)
- A smartphone with the plug's app, or a voice assistant
- Your home Wi-Fi name and password
- A wall socket that is within Wi-Fi range
Step by step
Check the rating
Look at the plug's rating. Add up the wattage of what you plan to plug in. Many smart plugs are rated for up to 10A or 13A, but they heat up, so use a lower load for heaters and avoid them unless the plug says it is suitable.
Plug it in
Plug the smart plug straight into a wall socket, not an extension lead. A light on the plug will usually flash to show it is in pairing mode.
Install the app
Download the manufacturer's app on your phone and create an account if you need one.
Join your Wi-Fi
Follow the app's steps to connect the plug. If it fails, check your phone is on the 2.4GHz network. Some routers combine 2.4GHz and 5GHz under one name. You may need to turn off the 5GHz temporarily or move closer to the router.
Name it
Call it something clear like 'Living room lamp', so you can use it with voice assistants.
Plug your device in
Plug the lamp or appliance into the smart plug and turn it on at the device. Test the app switch.
Set a schedule
Add timers, for example 'lamp on at sunset, off at 11 pm'. You can also link it to Alexa, Google Home or Apple Home if the plug supports it.
Tips
- Use smart plugs on lamps, fans, Christmas lights and chargers. Do not use them on anything you could not safely leave on or off, such as medical equipment or fridges.
- Choose plugs with the UK safety marks and BS 1363 pins.
- Keep the plug in a sensible place with good airflow and not covered.
Stop and get help if
- The smart plug is warm, discoloured or smells of burning. Stop using it and unplug it.
- You want to control a heater, oven, hob or any high-power appliance. Use an electrician-fitted device instead.
- The plug does not have a UK approval mark or is a cheap unbranded imported one.
- Your wall socket is loose, scorched or damaged. Get an electrician to look at it.
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Common questions
Why will my smart plug not connect to Wi-Fi?
Most smart plugs only work on 2.4GHz. Make sure your phone is on the 2.4GHz network when you set it up, and move the plug close to the router for the first pairing.
Can I use a smart plug with a heater?
Only if both the plug and the heater are clearly rated for it, and with great care. In most cases, do not. Heaters draw a lot of power.
Do smart plugs use electricity?
A very small amount all the time, but usually less than the saving if you use them to switch off things that would otherwise be left on.
More guides
Last reviewed 17 October 2026. This guide is general information for UK homes and is not a substitute for the manufacturer's instructions. If the job involves gas, mains wiring, asbestos, structural work or working at height, or you are unsure, ask a suitably qualified person.