Wire Codes: Wire codes typically convey which information?

• A. Manufacturing date
• B. Voltage rating and color-coded insulation
• C. Maximum bending radius
• D. Wind-resistance rating

Answer: (B)

Wire codes are markings on electrical conductors that tell you what the conductor is rated for and how to identify it quickly in a bundle or during installation. The most important pieces shown are the voltage rating, which tells you the maximum voltage the insulation and conductor are designed to handle safely, and the color of the insulation, which identifies the conductor’s function (such as hot, neutral, or ground) and helps you follow circuits correctly in a system. This information keeps installations safe and ensures you pair the right wire with the right voltage and device.

Other ideas in the options don’t fit typical wire codes. Manufacturing date isn’t a standard part of wire marking, and maximum bending radius or wind-resistance rating come from mechanical or environmental specs rather than the electrical code markings found on the insulation.