What type of coding is placed on a conductor to identify the type of insulation?

The correct answer is that colors are used to code conductors to identify the type of insulation. This system relies on commonly recognized color codes that indicate various properties of the wire insulation, such as its thermal resistance or environmental suitability. For instance, different colors may signify insulation that is rated for higher temperatures or specialized applications.

Using color coding serves as a quick visual reference, allowing technicians and electricians to easily identify and select the appropriate wire for specific tasks, while minimizing the risk of error. This system is widely adopted in the industry for its efficiency and effectiveness in conveying information at a glance.