What is considered the best starting point for tracing an electrical circuit?

The best starting point for tracing an electrical circuit is the power supply. This is because the power supply is the source of energy for the entire circuit, and understanding where the electrical energy originates is crucial for analyzing the flow through various components.

Beginning at the power supply allows one to trace the path through the circuit as it distributes voltage to loads and other components. By starting here, you can follow the flow of electricity, check for voltage drops, and ensure that the circuit is powered properly.

Tracing from the power supply also helps in identifying any potential issues, such as faulty connections or components that are not receiving adequate voltage. Overall, focusing on the power supply sets a solid foundation for understanding the entire circuit's operation and for systematic troubleshooting.