If a switch is marked "CO/ALR," which types of conductors is it suitable for?

The marking "CO/ALR" on a switch indicates that it is suitable for use with aluminum conductors, copper conductors, and copper-clad aluminum conductors. This designation means that the switch has been tested and approved for safe operation with all three types of conductors, which is important for ensuring both safety and functionality in electrical installations.

This versatility allows electricians and engineers to select this type of switch without needing to worry about the specific type of conductor they are using in their installations, making it much more flexible and reliable in a variety of applications. Understanding these classifications is crucial for ensuring proper compatibility and to prevent issues such as overheating or poor connections that can arise from improper conductor-switch combinations.