Which of the following is a proper way to handle multiple electrical circuits?

Testing all circuits individually is a fundamental practice in ensuring safety and accuracy in electrical measurement. By handling each circuit separately, you can identify potential faults or issues without risking a cascading failure across multiple circuits. This method allows for more precise measurements, since the influence of other circuits is eliminated.

Furthermore, testing circuits individually reduces the risk of overloads and short circuits. Each circuit can be assessed for its specific characteristics, such as voltage, current ratings, and insulation integrity. This process also makes it easier to troubleshoot any problems, as you can pinpoint the precise circuit that may be malfunctioning. Overall, individual testing is essential in maintaining a safe working environment, ensuring proper functioning, and adhering to electrical safety regulations.