Installing 230V Sockets in a Campervan (UK Wiring Guide)
Having 230V sockets in your campervan means you can plug in a laptop, charge devices, or run small mains appliances without thinking twice. But wiring mains electricity into a vehicle is not the same as adding a socket to your kitchen wall. You need the right sockets, correct cable, proper protection, and a healthy respect for the fact that 230V can kill.
This guide covers everything you need to know about installing BS 1363 sockets in a campervan — from choosing the right type to wiring them safely through a consumer unit with RCD protection.
Design Your 230V System
Our free calculator helps you plan your complete campervan electrical system, including 230V circuits, inverter sizing, and battery requirements.
What Type of Socket Do You Need?
In the UK, the standard mains socket is the BS 1363 double socket — the familiar three-pin design you have in every room of your house. You can use these in a campervan, but you need to think about the environment.
Surface Mount vs Flush Mount
Surface mount sockets sit on top of the wall panel. They are easier to install — you just cut a small hole for the cable entry, screw the backbox to the panel, and wire up. This is the approach most van converters take because campervan walls are thin plywood or composite panels that do not suit flush mounting.
Flush mount sockets sit inside the wall with only the faceplate visible. These look neater but require a recessed backbox, which needs at least 25mm of depth behind the panel. In a van, this is often impractical unless you are building out thick walls or fitting sockets into furniture carcasses.
For most campervans, surface mount is the practical choice.
IP-Rated Sockets for Wet Areas
Standard BS 1363 sockets are rated IP20 — essentially no water protection. In a campervan, condensation is a constant companion, and areas near the sink or sliding door can get damp.
For wet or humid locations, use IP44 or IP55 rated sockets with spring-loaded covers that close over the pins when not in use. These cost £8-£15 each compared to £3-£5 for standard sockets, but the protection is worth it.
| Location | Recommended Rating | Example |
|---|---|---|
| Kitchen worktop area | IP44 minimum | Weatherproof socket with hinged cover |
| Near sliding door | IP44 minimum | Weatherproof socket with hinged cover |
| Bedroom area / overhead | IP20 (standard) | Standard BS 1363 double socket |
| Under seat / wardrobe | IP20 (standard) | Standard BS 1363 double socket |
| Bathroom / wet room | IP55 or higher | Waterproof enclosure with cover |
Never Install Standard Sockets Near Water
A standard IP20 socket near a sink or in an area prone to condensation is a serious shock risk. Moisture can bridge the contacts and create a path for current to flow through you. Use IP-rated sockets in any location where water or condensation could reach the socket.
Double-Pole Switched Sockets
Always use double-pole switched sockets. A double-pole switch disconnects both the live and neutral conductors when turned off. This matters because some campsite hook-ups have reversed polarity — what should be the neutral wire is actually live. A single-pole switch would only break the neutral in this situation, leaving the socket energised even when switched off.
Double-pole switched sockets cost only £1-£2 more than single-pole versions. There is no reason not to use them.
How Many Sockets Do You Need?
Most campervans work well with two to three double sockets:
- Kitchen area — for a kettle, toaster, or charging devices while cooking
- Living/sleeping area — for laptops, phone chargers, or a CPAP machine
- Garage/utility area (optional) — for power tools or charging equipment
Three double sockets give you six outlets, which is plenty for a campervan. More importantly, placing sockets in different zones means you do not need to run extension leads across the van.
Think About What You Will Actually Plug In
Before drilling holes, sit in your van and think about where you will use mains appliances. Where does the laptop go? Where do you charge phones overnight? Where would a kettle or toaster sit? Position your sockets within arm's reach of these spots, at a comfortable height (300-450mm above the worktop for kitchen sockets, 200-300mm above bed level for bedroom sockets).
Wiring 230V Sockets from the Consumer Unit
Circuit Design: Radial Circuit
Campervan sockets are wired in a radial circuit — a single cable runs from the MCB in the consumer unit to the first socket, then continues to the second socket, then to the third. This is simpler than the ring circuit used in houses and perfectly adequate for the low number of sockets in a van.
The cable starts at a dedicated MCB in your consumer unit and ends at the final socket in the chain.
Cable Specification
For a socket circuit protected by a 16A MCB:
- Cable type: 2.5mm² three-core flat twin-and-earth (6242Y) or 2.5mm² three-core flexible cable (H07RN-F for exposed runs)
- Colour coding: Brown (live), blue (neutral), green/yellow (earth)
- Maximum circuit length: Keep runs as short as practical. For a 16A circuit on 2.5mm², voltage drop becomes a concern above about 20 metres — unlikely in a campervan, but worth noting
Step-by-Step Wiring
Before starting: Isolate all 230V power. If connected to hook-up, disconnect the cable. If using an inverter, switch it off and disconnect.
-
Plan the cable route. Run from the consumer unit to each socket location. Keep 230V cable at least 50mm away from 12V wiring to avoid interference. Use cable clips or conduit to secure the cable and protect it from vibration damage.
-
Mount the backboxes. Screw surface-mount backboxes to the wall panel at your chosen positions. Use appropriate fixings for the panel material — self-tapping screws into plywood, rivnuts into metal.
-
Run the cable. Feed 2.5mm² cable from the consumer unit to socket 1, then from socket 1 to socket 2, and so on. Leave 150mm of slack at each backbox for termination.
-
Strip and terminate. At each socket, strip the outer sheath and inner insulation carefully. Connect: brown to live terminal (L), blue to neutral terminal (N), green/yellow to earth terminal (E or the earth symbol). Ensure no bare copper is visible outside the terminals.
-
Connect at the consumer unit. The cable from the first socket connects to the designated MCB (live), neutral busbar (neutral), and earth bar (earth).
-
Fit the faceplates. Tuck the cables neatly into the backbox and screw the faceplate on. Ensure no cable is pinched or strained.
Earth Bonding
Every socket's earth terminal must be connected back to the earth bar in the consumer unit via the cable's earth conductor. If you use metal backboxes, the backbox itself must also be earthed using a short fly lead from the backbox earth terminal to the socket earth terminal.
For full details on earthing requirements, see our campervan earth bonding guide.
RCD Protection: Non-Negotiable
Every 230V socket in your campervan must be protected by a 30mA RCD (Residual Current Device). This is not optional — it is required by BS 7671 Section 721 for caravan and motorhome installations.
The RCD sits in your consumer unit, upstream of the MCBs. It monitors for earth leakage current (which would flow through you if you touched a live part) and trips within 30 milliseconds if it detects a 30mA imbalance.
What This Means in Practice
- Your socket circuit MCB connects to the RCD's output side
- The RCD protects all circuits downstream of it — sockets, charger, everything
- Test the RCD monthly using the built-in test button
- If the RCD trips during normal use, there is a fault — investigate before resetting
Powering Sockets: Hook-Up vs Inverter
Your 230V sockets can be powered by two sources:
Shore Power (Hook-Up)
When connected to a campsite hook-up, your sockets receive mains power through the consumer unit. This is the simplest scenario — plug in and go.
Inverter
When off-grid, a pure sine wave inverter converts 12V DC from your leisure battery to 230V AC. The inverter output feeds into the consumer unit (or directly to the sockets, depending on your wiring design), and your sockets work the same as on hook-up.
Use a Changeover Switch
If you have both hook-up and an inverter, install a changeover switch (or an automatic transfer switch) that selects between the two sources. This prevents backfeeding the inverter into the hook-up supply or vice versa, which would be dangerous. A manual changeover switch costs £15-£30 and is a straightforward install.
Positioning Tips
Good socket placement makes life in the van dramatically more pleasant:
- Kitchen sockets: Mount at worktop height, 300-450mm above the surface. Keep at least 300mm horizontally from the sink to avoid splashes. Use IP44 sockets here.
- Bed area sockets: Mount at mattress height plus 200-300mm, within arm's reach of where you sleep. These are for phone charging and CPAP machines.
- Desk/work area: If you work from the van, a double socket at desk height saves running cables across the floor.
- Avoid floor level: Sockets below 150mm from the floor are at risk of water pooling and are hard to access.
- Avoid directly above the hob: Heat and grease from cooking will damage the socket over time.
Common Mistakes
Using extension leads instead of proper sockets. A daisy chain of extension leads is a fire risk in a vibrating vehicle. Install enough sockets in the right places and you will not need them.
Forgetting to secure cables. In a house, cables sit still. In a van, they vibrate constantly. Unsecured 230V cable will chafe through its insulation over time, creating a short circuit or shock hazard. Use cable clips every 300mm and protect any cable passing through metalwork with grommets.
Mixing 12V and 230V in the same backbox. Never install a 12V socket (cigarette lighter or USB) in the same backbox as a 230V socket. The voltages must be kept separate. Use different coloured faceplates or labels to distinguish 12V from 230V outlets.
Not labelling the circuit. Label your socket circuit at the consumer unit so that anyone can identify and isolate it. A simple adhesive label reading "Sockets" on the MCB is sufficient.
Materials and Costs
Here is a typical bill of materials for a three-socket installation:
| Item | Quantity | Unit Cost | Total |
|---|---|---|---|
| BS 1363 double-pole surface socket | 3 | £5 | £15 |
| IP44 weatherproof socket (kitchen) | 1 | £12 | £12 |
| Surface mount backbox (25mm) | 3 | £2 | £6 |
| 2.5mm² twin-and-earth cable (10m) | 1 | £15 | £15 |
| Cable clips (pack) | 1 | £3 | £3 |
| 16A Type B MCB | 1 | £6 | £6 |
| Total | ~£57 |
This does not include the consumer unit or RCD, which are shared across all your 230V circuits. See the consumer unit wiring guide for those costs.
FAQ
Can I use standard household sockets in a campervan?
Yes, standard BS 1363 sockets are fine for dry areas inside the van. For locations near water or the sliding door, upgrade to IP44-rated weatherproof sockets. Always use double-pole switched versions regardless of location.
How many sockets can I run on one MCB?
There is no fixed limit on the number of sockets per MCB — it is the total load that matters. A 16A MCB on 2.5mm² cable can supply up to 3,680W across all connected sockets. In a campervan, three to four double sockets on one 16A radial circuit is standard practice.
Do I need separate circuits for sockets and the battery charger?
It is not strictly required if the combined load stays within the MCB rating, but separate circuits are strongly recommended. If a socket circuit trips (say, a faulty appliance), your battery charger continues to work on its own circuit. This costs one extra MCB — about £6 — and is worth the independent protection.
Can my inverter power the 230V sockets?
Yes. A pure sine wave inverter can feed your sockets through the consumer unit. The inverter must be sized to handle the maximum load you will plug into the sockets. For most campervan use (laptops, chargers, small appliances), an 800W to 1200W inverter is sufficient. For high-power appliances like kettles or hair dryers, you need 2000W or more — and a battery bank to match.