The short answer
Most mains-powered electric gates need a dedicated, weatherproof power supply run from your consumer unit to the gate — usually a fused spur with cable run underground in conduit to the gate motor and control box. The mains connection should be carried out by a qualified electrician working to the wiring regulations, while the gate installer handles the motor, control board and safety devices. On remote sites without easy mains access, a solar and battery system is an alternative. Groundwork (digging trenches, laying ducting and concreting posts) is a significant part of the job and is best planned before the gate is fitted.
The hardware most people picture — the gate and the motor — is only part of an installation. Getting power safely to the gate, and running the control and access cabling, is just as important and often where the groundwork cost sits. This guide explains what supply a typical electric gate needs, how the cabling and digging is done, and where the line falls between an electrician’s work and the gate installer’s. Power and installation are usually quoted as part of the whole job — see our cost guide for how it fits the overall figure.
Power & installation at a glance
- Supply: dedicated weatherproof spur from the consumer unit
- Cable: armoured/ducted, run underground in conduit
- Mains work: qualified electrician, to wiring regs
- Gate work: motor, control board, safety devices
- Groundwork: trenches, ducting, concreted posts
- No mains nearby: solar & battery alternative
What power supply does an electric gate need?
A typical domestic electric gate runs from a standard 230V mains supply, but it needs its own dedicated, weatherproof feed rather than being spurred off a random nearby socket. The usual arrangement is a fused spur taken from the consumer unit, with armoured or ducted cable run out to a weatherproof control box near the gate. The motor itself often runs at a lower voltage (the control box steps it down), which is part of why the safety and control electronics live in that box. Because the supply is outdoors and feeds machinery, the mains side must meet the wiring regulations — which is why a qualified electrician should make the connection, even though the gate installer fits everything beyond it.
| Task | Who normally does it | Notes |
|---|---|---|
| Mains spur from consumer unit | Qualified electrician | To current wiring regulations |
| Trenching and ducting | Installer / groundworker | Cable run underground in conduit |
| Concreting gate posts | Installer / groundworker | Must take the gate’s weight |
| Motor and control board | Gate installer | Low-voltage motor circuit |
| Safety devices and force test | Gate installer | Photocells, edges, force limitation |
Cabling and groundwork
Getting power and signals to the gate usually means digging. Cable for the mains supply, the access control (keypad, intercom, loop) and the second gate leaf (on a double gate) is run underground in protective ducting, so the trenching is often done in one go. The gate posts themselves are concreted in and must be strong enough to carry the weight of a moving gate for years — an undersized or poorly set post is a common cause of trouble later. This groundwork is why it’s far cheaper to plan the whole installation, including access control, before the driveway is finished. Retro-fitting a buried cable across a new resin or block-paved drive is expensive and disruptive.
When there’s no easy mains supply
Not every entrance has a convenient power source. If the gate is a long way from the house or on a remote plot, running a new mains feed can be costly. In those cases a solar and battery system is a genuine alternative: a panel charges a battery that runs the low-voltage motor and electronics. It suits lighter-use gates in sunnier, open positions and removes the trenching for a mains run. It isn’t right for every gate — heavy or high-traffic gates may need more power than a panel can reliably supply — but it’s worth asking about when mains is awkward. Our solar and battery guide covers when it works.
Installation and safety go together
Power and groundwork get the gate moving, but a finished installation isn’t complete until the safety system is fitted and tested. Once the motor and control board are wired, the installer must add the safety devices — photocells, safety edges and force limitation — carry out a risk assessment, force-test the gate and issue a Declaration of Conformity. A gate that is powered up but not safety-tested is not legally ready to use. Make sure your quote includes the full safety commissioning, not just “supply and connect”. Our safety regulations guide explains exactly what that final step involves.
Compare electric gate quotes
A clear quote should set out the supply, groundwork and who connects the mains. Use our service to get matched with an automated gate installer who works with a qualified electrician.
Frequently asked questions
What power supply does an electric gate need?
A typical domestic gate runs from a 230V mains supply via a dedicated, weatherproof fused spur taken from the consumer unit, with cable run underground in conduit to a control box near the gate. The motor itself often runs at a lower voltage stepped down inside the control box. Where mains is impractical, a solar and battery system is an alternative.
Can I install an electric gate myself?
The mains connection is a job for a qualified electrician working to the wiring regulations, and the gate must be force-tested with a Declaration of Conformity issued — so a full DIY install is not advisable. Automated gates are machinery and must meet strict safety duties. Most homeowners use a competent installer who handles the supply, groundwork, motor and safety together.
How is the cable run to an electric gate?
Cable for the mains supply, access control and the second gate leaf is run underground in protective ducting, usually in a single trench dug during installation. Planning this groundwork before the driveway is finished avoids the cost and disruption of digging up a new surface later.
Do I need an electrician for an electric gate?
Yes for the mains side. Connecting an outdoor machinery supply to your consumer unit must meet the wiring regulations and is a qualified electrician’s job. A reputable gate installer either employs or works with one and provides the relevant electrical certification for the supply.
Sources & further reading
- DHF (Door & Hardware Federation) — powered gate installation guidance
- Gate Safe — advice on safe automated gate installation
- Supply of Machinery (Safety) Regulations 2008 — duties for automated gates
- BS EN 12453 / BS EN 13241 — safety in use of power-operated gates
This is general information, not advice for your specific property. Supply arrangements and groundwork vary with site. Always use a competent installer and a qualified electrician, and get written certification.