How to Wire a 4G Dimmer Switch for 120W Linear Lighting

Quick answer

Wiring a 4G dimmer switch for 120W linear lighting involves connecting the line, load, and neutral wires to the correct terminals, then testing each dimmer module independently. Always turn off power at the breaker before starting.

Step-by-step wiring process

1. Step 1: Identify the wires: Each dimmer module has a line (hot) terminal, a load (switched) terminal, and a neutral terminal. The ground wire connects to the metal back box. Label wires clearly to avoid confusion. Common mistake: mixing up line and load wires can cause the dimmer to not function or damage the module.
2. Step 2: Connect the first module: Connect the line wire from the power source to the line terminal of the first module. Connect the load wire from the first lighting circuit to the load terminal. Connect the neutral wire from the circuit to the neutral terminal. Secure all connections with wire nuts. Checkpoint: ensure the wire gauge matches the terminal capacity (typically 14-12 AWG). Overtightening can strip threads.
3. Step 3: Repeat for remaining modules: Repeat the connection process for the second, third, and fourth modules, each with its own dedicated circuit. Keep wires organized and avoid crossing them between modules. Common mistake: daisy-chaining neutrals across modules can cause overloading. Each module should have its own neutral connection.
4. Step 4: Ground the dimmer: Connect the ground wire from the power source to the ground screw on the metal back box. The dimmer plate itself is grounded through the mounting screws. Ensure a solid metal-to-metal contact. Checkpoint: a loose ground can cause flickering or erratic dimmer behavior, especially with linear LED loads.
5. Step 5: Test before final assembly: Turn the power back on and test each dimmer module independently. Rotate the linear knob slowly to verify smooth dimming from 0 to 100%. If any module does not respond, turn off power and check connections. Common mistake: testing with the faceplate off can expose live terminals. Use a non-contact voltage tester to confirm the module is off before touching wires.
6. Step 6: Secure the plate and finish: Once all modules work correctly, turn off power, attach the brushed steel faceplate using the provided torx caps, and tighten evenly. Restore power and perform a final function test. Checkpoint: overtightening the torx caps can crack the plate. Use a torque screwdriver set to the manufacturer's specification if available.

Product facts

• 4G DIMMER / 120W / LINEAR / STEEL: This 4G dimmer is made from solid metal with a brushed steel plate and includes a linear dimmer knob, solid metal collar nuts, and torx caps. The solid metal construction provides durability and a premium feel, but requires careful grounding to prevent electrical noise in linear lighting circuits.