What do traveler, or switching, wires in three-way switch installations connect?

In a three-way switch installation, traveler wires connect the two switches to each other. These wires allow the switches to communicate, enabling control of a single light fixture from two different locations. When one switch is flipped, it changes the state of the circuit, allowing or interrupting the flow of electricity based on the configuration of the switches. This setup creates a versatile lighting control system that enhances convenience in areas where multiple access points to the light switch are beneficial, such as hallways or large rooms.

The other options refer to different connections that are not relevant in the context of traveler wires. The power supply to the light fixture and the light fixture directly to power do not involve these switching configurations, and ground connections are typically distinct from how traveler wires function within the control of the lighting circuit. Thus, the focus on the connection between the switches accurately defines the role of traveler wires in this electrical application.