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Installing the Wondrwall Light Switch

Guidance for qualified electricians on safely installing and wiring the Wondrwall Light Switch for lighting control and environmental sensing.

Introduction

The Wondrwall Light Switch replaces a standard light switch and forms the central control point for lighting and environmental sensing in the home. Correct installation is critical: improper wiring, shallow backboxes, or missing neutrals can prevent commissioning and cause delays on site.

This article provides step-by-step instructions for qualified electricians to install the Wondrwall Light Switch.

Safety & Compliance

Warning: This product must only be installed by qualified electricians.

  • Isolation: Isolate the circuit before beginning work and verify the supply is de-energised with an approved tester.

  • Regulations: Follow BS7671 wiring regulations and all relevant building codes.

  • PPE: Wear safety glasses, insulated gloves, and suitable site-approved protective gear.

  • Backbox depth: A minimum of 35 mm is required.

Before You Begin

Prerequisites

  • Neutral present at the switch location.

  • Stable internet connection in the property (required for commissioning later).

Tools required

  • Insulated screwdriver set.

  • Voltage tester.

  • Fixings for securing to the backbox if required.

Installation Steps

Step 1: Remove the Cover

  1. Push the cover upwards slightly to create a small gap between the cover and the main switch body.

  2. Option A – Hand method: Grip one side of the cover and gently pull to release the clips.

  3. Option B – Card method: Insert a thin plastic card (e.g. old debit card) into the gap at the top in portrait orientation. Slide in a zig-zag motion to release the clips.

  4. Carefully ease the cover off. Do not force it—if it feels stuck, check both clips are released.

  5. Store the cover safely to prevent damage.

Step 2: Connect the Power Feed

  • Connect live (L) and neutral (N) supply cables to the clearly labelled power input terminals on the rear of the device.

  • Tighten screw terminals securely.

  • Ensure all wiring is fully enclosed with no bare copper exposed.

  • Confirm that insulation colours are correct and clearly identifiable (if sleeving a grey conductor, sleeve consistently and appropriately).

Step 3: Connect Lighting Circuits

The Wondrwall Light Switch supports up to three gang lighting circuits.

  1. Connect the live and neutral of each circuit to the output terminals.

  2. Always connect to L3/N3 first, then L2/N2, and only use L1/N1 as a last resort.

    • For a single gang switch, use L3/N3.

    • For a two gang switch, use L3/N3 and L2/N2.

    • For a three gang switch, use L3/N3, L2/N2, and L1/N1.

  3. If present, place extractor fans on their own dedicated output.

  4. Any unused touch sensors will be reassigned automatically during commissioning.

  5. Refer to the Light Switch Technical Data Sheet for detailed output load values before finalising connections.

Step 4: Fix and Re-attach Cover

  • Secure the switch base to the backbox with the two fixing screws.

  • Ensure screws are tight enough for a flush finish but not excessively long.

  • Re-attach the cover, aligning the PIR semicircle on the switch body with the matching semicircle on the cover.

  • Check that there are no overlaps or gaps once fitted.

Verification

After restoring power:

  • Confirm the device powers on (LEDs briefly illuminate).

  • Check that lighting circuits operate correctly in manual mode.

  • Verify that the cover is properly secured with no visible gaps.

Note: The best practise is to confirm circuits are connected to L3/N3 or L2/N2 wherever possible.

Multi-way Lighting

Multi-way lighting is configured in the Wondrwall app during commissioning, not by conventional wiring.

  • Each Light Switch must have its own power feed.

Common Installation Errors to Avoid

  • Missing neutral at the backbox.

  • Shallow backbox (<35 mm) causing pinched cables.

  • Incorrect output assignment (e.g. extractor fan sharing a lighting circuit).

  • Using L1/N1 before L3/N3 or L2/N2.

  • Cover left unsecured, misaligned, or overlapping the PIR sensor.

Handover to Wondrwall Engineer

Before leaving site:

  • Confirm the Light Switch powers correctly and all circuits function.

  • Ensure backbox depth and wiring space meet requirements.

FAQs

Q: Can the Wondrwall Light Switch be installed without a neutral?
No. A neutral conductor must be present at the backbox.

Q: How do I configure two-way lighting?
Do not wire conventionally. Connect each switch to a power feed; configuration is completed in the Wondrwall app during commissioning.

Q: How many circuits can one switch support?
Up to three. Unused outputs are reassigned during commissioning.

Q: Does the Light Switch fit standard UK backboxes?
Yes, but the backbox must be at least 35 mm deep.

 

Help: 

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