What is the purpose of a wiring diagram?

• A. To illustrate how electrical components are connected and how current flows through a system.
• B. To measure insulation resistance.
• C. To calculate load requirements.
• D. To pilot a network for wireless devices.

Answer: (A)

A wiring diagram is a map of how electrical components are connected and how current flows through a system. It shows where power comes from, how devices are linked, and the path wires take between terminals, switches, fuses, and loads. This helps technicians install wiring correctly, verify that each connection is in the right place, and troubleshoot by tracing circuits to see where the current should go. It’s a practical guide for building and maintaining the electrical system safely and efficiently.

Measuring insulation resistance, calculating load requirements, or planning a wireless networking setup aren’t the purposes of a wiring diagram. Insulation resistance testing is about checking insulation quality with a meter. Load calculations involve determining currents and conductor sizing, while wireless network planning focuses on communication signals, not electrical wiring diagrams.