Safe installation: Switches, sockets and dimmers

⚠️ Important

  • 230 V is dangerous. Have a qualified electrician perform fixed electrical connections, replacement and wiring checks.
  • Switching off using a button or app does not isolate the device from the mains. Do not open the mechanism or touch terminals.
  • Use only manufacturer-approved loads and environments. Do not leave a socket’s protective earth contact disconnected where a protective conductor is required.

What to know before buying

Check whether the mounting box contains a neutral conductor N: many smart switches need one. Never use protective earth PE instead of N. Devices without N may require a minimum load and a manufacturer-specified bypass module at the light fitting.

Check box depth, fixings and wiring space. Compare rated current in amperes, power in watts and load type: LED limits may be lower than incandescent limits. Dimmers need dimmable lamps, compatible drivers and a matching dimming method. Connect motors or heaters only where permitted. Installing several devices together may require reduced load limits. Check multi-location switching arrangements, wireless protocol and hub requirements. An electrician assesses wiring, circuit breakers and residual-current protection RCD, especially for sockets and wet areas.

What the electrician does

  1. Isolates the circuit, prevents accidental reconnection and verifies absence of voltage using a suitable voltage tester.
  2. Identifies conductors and checks their condition, cross-section and protection, without relying solely on insulation colour.
  3. Checks the box, intended load, availability of N and PE, and suitability of the wiring arrangement.
  4. Connects conductors according to the manufacturer’s diagram and terminal requirements; does not combine neutrals from different circuits.
  5. Secures the mechanism and fits its cover without trapping wires or leaving live parts accessible.
  6. After necessary checks, restores power and verifies protection and operation; sets a stable dimming range where applicable.

What you can do yourself

After installation, install the app, connect to the appropriate network or hub and create routines. For Wi-Fi devices, check the required frequency band. Test buttons, remote control and behaviour after power or network restoration. Adjust settings through the app without opening the mechanism.

Common mistakes

  • Buying a device requiring N for a box without N.
  • Dimming non-dimmable LED lamps or incompatible drivers.
  • Applying incandescent power limits to LED loads.
  • Forcing a mechanism into a shallow box and trapping wires.
  • Using an ordinary switch diagram for multi-location control without checking compatibility.

When to disconnect power immediately

If you notice a burning smell, smoke, sparking, crackling, excessive heat, discolouration or repeated protective-device tripping, isolate the circuit at the distribution board if safe. Do not touch the damaged device or reconnect it before an electrician checks it.

See the manufacturer’s instructions for the exact wiring diagram (link on the product page). You can book installation with us.

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