Gives impact tests, static load tests, endurance tests and overload tests to be carried out when called for by the detail specification, for electromechanical components. Applicable to similar devices when specified in a detail specification. Includes sections on free fall, mechanical impact, static load, transverse and axial, robustness of actuating lever, mechanical operation, electrical load and temperature, mechanical operation with electrical load, durability of contact retention system and seals, electrical overload, mechanical overload and switching capacitive loads.