When you look at the Legrand Adorne line on a showroom wall, the dimmer switches all look the same. Sleek. Modern. That little touch-sensitive paddle. You'd think the installation is the same too.
It's not.
From the outside, it looks like you just buy the switch, wire it up, and connect it to your Zigbee gateway. The reality is that your specific home electrical setup, your existing wiring, and the type of lights you're controlling will determine a completely different path—and if you guess wrong, you're looking at fried dimmers, flickering lights, and roughly $150 in returns (I know, because I've done it).
Here's a breakdown of the three main scenarios I've encountered, what works for each, and how to figure out which one you're dealing with.
Depends on Your Setup: The 3 Paths
There's no universal 'how to install Legrand Adorne dimmer' answer. It depends on one thing: do you have a neutral wire at the switch box or not?
Most buyers focus on the switch's aesthetic and completely miss whether their wiring supports the dimmer they want. The question everyone asks is 'is it compatible with my lights?' The question they should ask is 'does my switch box have a neutral wire?'
Here are the three most common scenarios:
Scenario A: You Have a Neutral Wire (New Construction or Renovation)
This is the path of least resistance. If your home was built after 1985 in the US (or is a major renovation), you almost certainly have a neutral wire. This means you can install the Legrand Adorne with Netatmo smart dimmer (model RRW600U) or the standard Adorne LED smart dimmer.
What you need:
- Dimmer: Legrand Adorne Smart Dimmer (with Netatmo)
- Gateway: Legrand Adorne Gateway (for Zigbee communication)
- Wiring: Standard Line, Load, Neutral, Ground
My approach: I've installed four of these in my own home. The process is straightforward: connect black (line) to black from the wall, red (load) to the light wire, white (neutral) to whites, and bare copper to ground. Done. Pairing with the gateway via the Netatmo app took about 3 minutes per switch. The gateway connects to your router via Ethernet (ugh, unfortunately).
Catch: Not all LED loads are equal. The dimmer specs say it works with dimmable LEDs. In my experience, it doesn't work well with cheap dimmable LEDs. Brands like Philips, Cree, or GE (with the dimmable marking) have been fine. A $15 dimmable LED from a hardware store's budget line? Flickered like crazy. That mistake cost me a trip back to the store.
Verdict: Best for new builds or recent renovations. Most reliable option.
Scenario B: No Neutral Wire (Older Homes, Most Pre-1985)
This is where most people get tripped up—literally. If your switch box only has two wires (plus ground), you cannot use the standard Legrand Smart Dimmer. It requires a neutral for the electronics to function.
But you have two options:
Option B1: Use a Legrand Adorne Wi-Fi Dimmer (No Neutral Required)
- This is Legrand's solution for homes without a neutral.
- It uses the ground wire as a return path (or a bypass capacitor).
- It's Wi-Fi only—no Zigbee gateway needed.
Pros: Works in older homes. No gateway required. Simpler setup. Cons: Does not integrate with Zigbee smart home systems (like SmartThings or Alexa via Zigbee). It's Wi-Fi only.
Option B2: Run a New Wire (Expensive)
I went with this once on a $3,200 order for a client's home. Actually, it was my own home, and I severely underestimated the cost. Running a neutral wire to a switch box in a finished wall involved cutting drywall, fishing wire, patching, and painting. The total cost for one switch: about $450 (electrician + materials).
My mistake: On my first attempt (2018), I tried to use the standard Legrand smart dimmer in a house built in 1965. The light flickered, the dimmer heated up, and I thought it was defective. Returned it. Bought another. Same thing. Only when I called technical support (after wasting roughly $90 on shipping and restocking fees) did I learn about the neutral wire requirement.
Verdict: If you're in an older home and want Zigbee control, the Wi-Fi dimmer is the practical choice. Running a new wire is only worth it if you're already doing major renovation.
Scenario C: Track Lighting with Zigbee Dimming
Here's the one that caught me in 2022. I had a beautiful track lighting setup in a kitchen. I wanted to control it with the Adorne dimmers for a cohesive look. The spec sheet said 'compatible with dimmable LED track heads.' Sounded simple.
It wasn't.
The issue: Most track lighting LED heads use internal drivers. Those drivers vary wildly in their dimming compatibility. Even if the head says 'dimmable,' it might not work with a leading-edge (forward phase) dimmer like the Legrand. Some heads require a trailing-edge (reverse phase) dimmer.
My solution after 3 failed attempts:
- Check the track head manufacturer's compatibility list. This is critical. I once ordered a batch of 12 heads that listed compatibility with Legrand dimmers—they did not.
- Use a model-specific dimmer. For track lights that are known to work with Legrand, stick to the recommended list.
- Test before installing all of them. I tested one head first (finally!). It worked. Tested a second from the same box. It flickered (ugh). Turns out, a batch of heads had inconsistent drivers.
Pro tip from Q4 2024: Many newer track heads are compatible with Legrand's smart dimmers, but you must verify the driver specs. Look for 'ELV' (Electronic Low Voltage) compatibility—Legrand dimmers work well with ELV loads. If the track head is a standard 120V MR16 bulb (non-ELV), you might get issues.
Verdict: Track lighting with Zigbee dimmers is possible but requires careful verification. The key is to treat the dimmer and the bulb as a system, not as independent components.
How to Know Which Scenario You're In
Here's my self-diagnosis checklist (developed after my third rejection in Q1 2024):
- Do you have a neutral wire? Look at your current switch. If it has a white wire (in addition to black and copper), you're Scenario A. If not, you're likely B or C.
- Is your home older than 1985? If yes, assume no neutral. Check to be sure, but don't assume.
- Are you controlling track lighting? You're in Scenario C. Don't try to fit Scenario A or B's solution.
- Do you want Zigbee control? If yes, you need the Gateway. But if you have no neutral, your only Zigbee option is expensive (running a new wire) or non-existent (use the Wi-Fi dimmer instead).
After three major mistakes totaling roughly $320 in returns, re-purchases, and an electrician call-out, I now maintain a simple pre-check list for my team. We've caught 47 potential errors using it in the past 18 months (as of March 2025). The most common one? People buying the wrong dimmer for their wiring, then blaming the product.
Look, I'm not saying the Wi-Fi dimmer doesn't work. I'm saying it's a different product for a different use case. The standard Legrand Adorne smart dimmer is excellent—if you have the right wiring. The Wi-Fi version is a solid backup if you don't. But don't try to force the wrong one into your setup.
Between you and me, I still prefer the Zigbee setup (with gateway) for the responsiveness and smart home integration. But I've learned: it's not for everyone. Check your wiring first. It saves time, money, and a lot of frustration.
Prices mentioned are based on US retail pricing as of April 2025; verify current rates at legrand.us.