What device is primarily used to connect multiple electrical devices to a single power source?

The device that is primarily used to connect multiple electrical devices to a single power source is a junction box. A junction box is designed to house and protect wiring connections between multiple circuits, allowing various electrical devices to be fed from a centralized source safely.

Junction boxes serve an important function in electrical installations, as they provide a safe enclosure for connections, reducing the risk of electrical fires and ensuring that devices are powered properly. They can include circuit breakers, fuses, or simply serve as a point of connection for multiple wires leading to different electrical devices.

While options like a power panel and power board can distribute power, they are not typically used specifically for connecting multiple devices through accessible electrical connectors in the same way that a junction box does. A power hub may refer to a centralized location for power distribution but is not a common term specifically associated with the standard practices for electrical connections in residential and commercial wiring setups.