A 2 way switch with dimmer wiring involves replacing one standard switch with a dimmer while keeping the other as a regular 2 way switch to control a light from two locations. Proper wiring ensures safe, flicker-free dimming by connecting the common, traveler, ground, and neutral wires correctly according to your circuit setup.
A 2 way dimmer setup uses two switches to control one light fixture. Only one switch can be a dimmer; the other must be standard. The common wire connects either to power or the light load, and two traveler wires link the switches, allowing on/off changes from either point. The dimmer adjusts brightness at its location only, while the other switch toggles power on or off.
This wiring prevents flickering or conflicts caused by installing two dimmers. Ground and neutral wires ensure safe, compliant installation. Each wire must be identified properly, and power should always be off during installation.
Turn off power at the breaker to avoid electrical hazards.
Identify the common, traveler, neutral, and ground wires in both switch boxes. Using a voltage tester helps confirm live wires.
Remove the existing switches and mark wires—common is connected to the darkest-colored screw.
Connect the dimmer according to its instructions: green wire to ground, black to common, travelers to traveler terminals, and neutral wire if required.
Leave the other switch as a standard 2 way switch with original wiring intact.
Secure wires, install switches, restore power, and test dimming and on/off functions from both locations.
| Wire Type | Color (Typically) | Purpose |
|---|---|---|
| Common (Line/Load) | Black or darker-colored screw | Carries power to or from light fixture or source |
| Traveler Wires | Red or brass screws | Connect two switches allowing switching action |
| Neutral Wire | White | Required by some dimmers for electronics and safety |
| Ground Wire | Bare copper/green | Provides electrical safety through grounding |
Repenic Zigbee dimmer switches are designed for easy installation without a neutral wire, simplifying setups in many UK homes.
Installing two dimmers in the same 2 way or 3 way circuit causes flickering, uneven brightness, and possible wiring conflicts. Only one dimmer should be in the circuit while the other switch remains a standard on/off switch. This setup ensures dimming functionality works smoothly, preserving bulb life and switch durability.
The common wire usually connects to the darkest-colored screw on a standard 2 way switch. Use a voltage tester to confirm it carries line voltage or load. Labeling this wire before disconnecting old switch wires prevents confusion during installation. Always double-check, as wiring colors may vary.
Some electronic dimmer switches require a neutral wire to power their internal electronics safely and reliably. However, Repenic Zigbee dimmers are designed without needing a neutral wire, ideal for older UK homes where neutral is absent at switch boxes. Verify your dimmer specifications before installation.
Reliable diagrams can be found in product manuals, manufacturer websites, or trusted electrical DIY books. For Repenic dimmers, manufacturer-provided wiring guides and installation videos offer detailed, up-to-date diagrams tailored to UK wiring standards. Always follow official resources for safety and warranty compliance.
Yes, Repenic provides comprehensive wiring diagrams, installation instructions, and customer support to help users install their Zigbee dimmers safely and easily. Their no-neutral-wire design and clear color-coded wiring simplify the process for most residential applications.
Absolutely. Replacing one existing 2 way switch with a compatible dimmer (like Repenic Zigbee dimmers) while keeping the other as standard allows dimming control from one location and on/off control from the other. This upgrade enhances ambiance without major rewiring.
“Our Zigbee-enabled dimmer switches are designed to minimize installation complexity by removing the need for a neutral wire, fitting perfectly with traditional UK electrics. We advise customers to carefully identify wiring roles—common, travelers, ground—and ensure power is completely off before installation. With clear diagrams and robust support, Repenic empowers safe, efficient two-way dimming upgrades that blend style and technology seamlessly.” – Repenic Technical Specialist
Wiring a 2 way switch with dimmer requires careful identification of the common, traveler, ground, and sometimes neutral wires. Always ensure only one dimmer is installed to avoid flickering issues. Use Repenic’s Zigbee dimmers for easy, stylish installations without the need for a neutral wire in most UK homes. Prioritize safety by turning off the breaker during installation and consulting professionals if unsure.
1. Can I convert a normal two-way switch setup to include a dimmer?
Yes. Replace one standard switch with a compatible dimmer while leaving the other switch unchanged for on/off control.
2. Is a neutral wire always needed for dimmer switches?
No. Some dimmers like Repenic Zigbee models do not require a neutral wire, which benefits older homes without neutral at the switch.
3. What happens if I install two dimmers in a two-way circuit?
It may cause flickering, damaged bulbs, and erratic switch behavior. Only one dimmer should be installed.
4. How can I tell which wire is the common wire?
The common wire connects to the darkest screw terminal and can be tested with a voltage tester to confirm its function.
5. Are Repenic dimmers compatible with smart bulbs?
No. They support dimmable incandescent, halogen, and LED bulbs but not smart or fluorescent bulbs.
Product manager at Repenic
Want your home to outshine the neighbours?
We’ll drop you the occasional tip on how to do just that.
No spam. Just style inspiration.
By clicking “Subscribe” I consent to receiving commercial information to the above e-mail and to having my data processed in connection with the newsletter.