EN 60669-2-1 specifies the requirements for the safety and performance of switches for household and similar fixed electrical installations. It covers both mechanical and electrical properties of switches used for controlling lighting and other equipment. This part of the standard details specific conditions for switches that handle voltages up to 250 V AC and currents up to 16 A. It includes tests for durability, insulation, and operation under various conditions, ensuring that switches are safe and reliable for use in residential and similar environments.