How to install a smart light switch or dimmer

Here is a 178-word summary of the news article: The article provides a detailed guide on how to install a smart light switch or dimmer. It explains that the job requires basic tools like a screwdriver and a non-contact voltage tester to ensure the wires are not electrified. The first step is to identify the type of existing switch - single-pole or multi-way. Many smart switches are not compatible with multi-way circuits, so this needs to be checked beforehand. After turning off power at the circuit breaker, the existing switch is removed, and the wiring is examined. The line (hot) and load wires need to be correctly identified. Installing the new smart switch involves making connections for the line, load, neutral, and ground wires, often using wire nuts. Stuffing all the wires back into the electrical box can be challenging due to the larger size of smart switches. Ensuring the switch is plumb and flush with the wall is important for an attractive finish. Finally, the power is turned back on to test the new switch, and the cover plate is installed. The article also provides troublesshooting tips in case the switch does not work properly.