1. Helps in selecting the appropriate wire size for a specific electrical application, ensuring safety and efficiency. 2. Provides information on the maximum current capacity of different wire sizes, helping to prevent overheating and potential fire hazards. 3. Allows for easy comparison of different wire sizes and their corresponding ampacity ratings, aiding in the design and installation of electrical systems. 4. Helps in determining the voltage drop across a wire, ensuring proper voltage levels for electrical devices. 5. Provides guidance on the proper installation and use of electrical wires, reducing the risk of electrical failures and accidents.