The answer to 'why is my electrical wiring dimming lights' is that there are several common causes, including loose connections, overloaded circuits, or issues with the electrical panel. Dimming lights can be a symptom of underlying electrical problems that require professional diagnosis and repair.
Loose connections in the wiring or light fixtures can cause voltage drops that result in dimmer lights. Overloaded circuits, where too many devices are drawing power from the same circuit, can also lead to dimming. Issues with the electrical panel, such as a failing breaker or overheated wiring, can also contribute to dimming lights throughout the home. If you notice your lights consistently dimming, it's best to have an electrician inspect your home's wiring to identify and resolve the root cause.