From where is a 120-volt power supply for a residential electrical circuit typically taken?

A 120-volt power supply for a residential electrical circuit is typically taken from the load side of one branch circuit breaker and a neutral lug. In a standard residential setup, the branch circuit breaker distributes power to various electrical outlets and devices in the home.

When a circuit breaker is engaged, it allows current to flow from the supply system into the branch circuit. The load side refers to the part of the circuit where power is distributed to the devices. In a 120-volt system, one terminal of the branch circuit breaker outputs 120 volts, and the neutral wire, which serves as the return path for the current, is connected to a neutral lug. This configuration provides the necessary voltage for standard outlets and appliances.

The neutral connection is essential for completing the circuit and ensuring that the electrical system operates safely and effectively. It allows for the proper functioning of devices that rely on 120 volts in residential electrical systems.