How do i add usb power points or extra outlets to a room? (2026)
Quick Answer
If you want USB charging in a room, the simplest and safest option is usually to replace an existing socket faceplate with a like-for-like USB-integrated one, or use a plug-in USB charger. Adding a completely new outlet is a bigger electrical job that often requires checking circuit capacity, cable routes, earthing and local rules, so it is commonly one for a licensed electrician rather than a DIY task.
Overview
There are two quite different jobs people mean when they ask about adding USB power points or extra outlets. One is upgrading an existing socket so it includes USB charging ports. The other is creating an additional outlet where there is not one already. The first can be straightforward if you are only changing the accessory on an existing, suitable back box and the new unit matches the circuit type and manufacturer instructions. The second is more involved because it may require extending or altering fixed wiring, checking whether the circuit can safely take the extra load, and confirming the protection and test results afterwards. Before doing anything, identify what type of wiring system you have, whether the existing outlet is damaged or part of a ring or radial circuit, and whether local law allows you to carry out the work yourself. Always isolate the power properly and prove the circuit is dead before touching conductors. If there is any sign of overheating, brittle insulation, no earth conductor, aluminium wiring, uncertain polarity, or a crowded back box, stop and get professional help. USB sockets also have standby electronics and product-specific wiring requirements, so choosing a reputable product and following its instructions matters.
Who this is for
Homeowners or tenants planning a simple upgrade to an existing socket faceplate, and people considering whether adding a brand-new outlet is a DIY job or one for an electrician.
What you’ll need
- Replacement USB socket or outlet accessory approved for your country and wiring system
- Manufacturer installation instructions for the exact product
- Suitable insulated screwdrivers
- Two-pole voltage tester or other properly rated tester suitable for proving dead
- Access to the consumer unit or switchboard
- Good lighting, ideally not powered by the circuit you are isolating
- A camera or phone to record existing wiring before removal
- If adding a brand-new outlet: a licensed electrician in most cases
Before you start
Check whether you are replacing an existing outlet or creating a new one. Confirm the new accessory is compatible with the existing back box, conductor size, earthing arrangement and circuit type. Read the product instructions fully, check local electrical rules, and if you rent, get the landlord's permission first. Do not proceed if the existing outlet serves critical equipment, if you cannot clearly identify and isolate the correct circuit, or if the wiring looks old, damaged, altered or overcrowded.
Step-by-step
- 1
Decide which type of upgrade you actually need
Choose between a plug-in USB charger, a replacement USB socket faceplate, or a completely new outlet in a different position. If all you need is phone charging, a plug-in charger is often enough. If you want a tidier finish, a replacement USB socket may suit. If there is no outlet where you need power, treat it as a new electrical point rather than a simple swap.
Why: These options differ a lot in complexity, safety checks and whether DIY is realistic.
- 2
Check the existing outlet and product compatibility
Remove nothing yet. Look at the existing outlet style, gang size, back box depth, and whether there is enough space for a bulkier USB mechanism. Make sure the replacement is intended for your country, voltage system and outlet type, and that its instructions cover your wiring arrangement.
Why: USB outlets are often deeper than standard accessories, and forcing one into a shallow or crowded box can damage conductors or connections.
- 3
Isolate the power and prove it is dead
Turn off the correct circuit at the consumer unit or switchboard. Use a proper tester to verify the outlet is de-energised before touching any screws or conductors. Follow safe proving practice for your tester according to its instructions.
Why: Turning off a breaker is not enough on its own; mislabelling, shared circuits or backfeeds can leave conductors live.
- 4
Document the existing wiring before disconnecting anything
Unscrew the existing faceplate carefully and take clear photos showing where each conductor is connected. If the wiring does not match the expected markings, if there are extra conductors, or if insulation is discoloured or brittle, stop and get an electrician.
Why: A photo record helps you restore the original arrangement accurately and avoid polarity or earthing errors.
- 5
If replacing the outlet, transfer conductors exactly as instructed
Move each conductor to the corresponding terminal on the new USB socket exactly as the product instructions show. Make sure insulation is not trapped, exposed copper is minimised as required by the manufacturer, and terminal screws or clamps are tightened to the product's specified requirement. Fold conductors back neatly without sharp kinks and refit the faceplate gently.
Why: Loose or incorrect terminations are a common cause of overheating, arcing and device failure.
- 6
If you want a brand-new outlet, stop and assess whether this is professional work
A new outlet usually means running cable, selecting a safe route, maintaining required protection, ensuring the circuit can support the added load, and carrying out testing after the alteration. In most homes this is not a basic DIY task. Arrange for a licensed electrician if there is any doubt.
Why: New fixed wiring must be designed, installed and tested properly to prevent shock, fire and nuisance tripping.
- 7
Restore power and test the result
Turn the circuit back on and test the socket with a suitable socket tester or by plugging in a known working appliance, then test the USB ports with an appropriate cable and device. Watch for warning signs such as crackling, warmth, burning smell, poor fit, or intermittent charging, and switch off immediately if anything seems wrong.
Why: A device can appear fitted correctly but still have a wiring fault or poor connection that only shows under use.
Why this works
A socket outlet provides mains power through fixed wiring. A USB-integrated outlet adds an internal power supply that converts mains electricity to low-voltage USB charging power. Replacing an existing accessory can work well if the underlying circuit is already sound and the new unit is correctly matched, but adding an extra outlet changes the fixed wiring system and must be treated as an electrical alteration, not just a cosmetic upgrade.
Common mistakes to avoid
- Assuming a USB socket is a simple like-for-like swap without checking back box depth or cable space
- Failing to prove the circuit is dead before touching conductors
- Mixing up conductor positions or relying on wire colours alone instead of the terminal markings and product instructions
- Overtightening or undertightening terminals instead of following the manufacturer's specified method
- Trying to add a new outlet by spurting off unknown wiring without confirming the circuit design and legal requirements
- Ignoring signs of old or damaged wiring such as heat marks, loose terminals or missing earth continuity
Troubleshooting
USB ports do not charge, but the mains socket works
Check the product instructions, confirm the USB function is not switch-dependent, and make sure the unit is energised and correctly wired. If still faulty, isolate power and have the installation checked; the internal USB module may be defective or incorrectly connected.
Faceplate will not sit flush against the wall
Do not force it. The back box may be too shallow or overcrowded, or the conductors may need re-dressing. If there is not enough space, choose a compatible product or ask an electrician about changing the box arrangement.
Breaker or RCD trips after fitting the new outlet
Switch off and stop using it. This can indicate incorrect wiring, damaged insulation, a neutral-earth fault, or a faulty accessory. Recheck against the product instructions only if you are competent; otherwise get an electrician.
Socket or USB charger becomes warm quickly
A little warmth may occur with electronics, but excessive heat is not normal. Disconnect use, isolate the circuit and have the terminations and product suitability checked.
Compare your options
Plug-in USB charger
Best for: Fast, low-risk charging without altering fixed wiring
Pros: No electrical installation work, easy to replace, often the simplest option for tenants
Cons: Takes up socket space, less tidy, quality varies widely
Replace existing socket with USB-integrated socket
Best for: A tidier charging point where a suitable outlet already exists
Pros: Convenient, built-in look, no need for separate charger in daily use
Cons: Needs safe isolation and correct wiring, may not fit shallow or crowded boxes, USB technology can date faster than the socket itself
Add a completely new outlet
Best for: Rooms that genuinely need more mains access in a new location
Pros: Most flexible for furniture layout and reducing extension lead use
Cons: Usually the most complex option, often requires a licensed electrician, may involve wall chasing, cable routing and testing
| Option | Best for | Pros | Cons |
|---|---|---|---|
| Plug-in USB charger | Fast, low-risk charging without altering fixed wiring | No electrical installation work, easy to replace, often the simplest option for tenants | Takes up socket space, less tidy, quality varies widely |
| Replace existing socket with USB-integrated socket | A tidier charging point where a suitable outlet already exists | Convenient, built-in look, no need for separate charger in daily use | Needs safe isolation and correct wiring, may not fit shallow or crowded boxes, USB technology can date faster than the socket itself |
| Add a completely new outlet | Rooms that genuinely need more mains access in a new location | Most flexible for furniture layout and reducing extension lead use | Usually the most complex option, often requires a licensed electrician, may involve wall chasing, cable routing and testing |
Alternatives
- Use a high-quality plug-in USB charger from a reputable brand
- Use a surge-protected extension lead with integrated USB charging if appropriate for the room and load
- Rearrange furniture so existing outlets are more usable rather than adding fixed wiring
Pro tips
- Buy electrical accessories from reputable manufacturers and avoid unbranded USB outlets with unclear approvals or instructions
- Take a clear photo of the original wiring before loosening any conductor
- Label the isolated breaker or switchboard position so nobody turns it back on while you are working
- If the room needs more than one new outlet, plan the whole layout first rather than adding points one by one
Safety notes
- Never work on live wiring
- Use a proper voltage tester and prove the circuit is dead before touching conductors
- Stop immediately if you find damaged insulation, overheating marks, water ingress, no earth conductor or unfamiliar wiring
- Do not overload outlets with heaters or other high-demand appliances just because USB ports are present
- Keep children away from the work area until the faceplate is fully refitted and tested
Legal & regulatory notes
Rules on who can replace accessories or add outlets vary by country and sometimes by region. Replacing a faceplate may be allowed in some places and restricted in others. Adding a new outlet commonly falls under work that must meet local wiring rules and may require a licensed electrician, inspection or certification. Check your local electrical safety regulator before starting.
What this guide does not cover: This guide does not provide country-specific wiring diagrams, testing procedures, or permission to carry out regulated electrical work yourself. It is general guidance to help you choose a safe approach and recognise when professional installation is the right option.
Cost considerations
A plug-in USB charger is usually the lowest-cost route. A USB-integrated replacement outlet costs more than a standard faceplate and may also require a deeper box or electrician time. A completely new outlet is usually the most expensive option because labour, cable routing, making good walls and mandatory testing can outweigh the accessory cost.
Prefer to hire a professional?
If this job is beyond a confident DIY — or the work needs to be done by a licensed professional — you can find a verified electrician through these directories of real, verified trade businesses. Compare local tradespeople, read their details and request quotes before you commit.
Frequently asked questions
Can I just swap a normal socket for a USB one?+
Sometimes, yes, if it is a genuine like-for-like accessory change and the new unit is compatible with the existing box and wiring. You still need to isolate power safely, follow the exact product instructions and comply with local rules.
Is it better to install USB-A or USB-C outlets?+
Choose based on the devices you actually charge and the product support from a reputable manufacturer. USB charging standards change faster than fixed wiring accessories, so many people prefer a standard socket plus a separate charger for flexibility.
Can I add a new outlet by spurting off an existing one?+
That depends on the circuit design, loading, cable routes, protection and local regulations. Because getting this wrong can create fire and shock risks, a new outlet should usually be assessed and installed by a licensed electrician.
Why does my new USB socket feel deeper than the old one?+
It contains extra electronics to convert mains power to USB charging power. That often means it needs more back box space and careful cable dressing.
Do USB outlets use power all the time?+
Many contain electronics that can draw a small standby load even when nothing is charging. Check the manufacturer's information if standby use matters to you.
Sources & references
Guidance on this page is traced to documented sources. Last checked 25 September 2026.
- Electrical Safety First · industry
Supports general domestic electrical safety guidance, the need to isolate circuits safely, and the importance of using competent persons for electrical work.
- WorkSafe New Zealand · government
Supports checking New Zealand electrical safety requirements, legal responsibilities, and when prescribed electrical work must be done or certified by authorised people.
- Schneider Electric · manufacturer
Supports the need to follow manufacturer instructions, product compatibility, and correct installation of electrical accessories including USB outlets.
Basic safety principles stay fairly stable, but product designs, USB charging standards and local electrical rules can change over time.