Dimensions
Mechanical components
Storage equipment
Racks
Printed-circuit boards
Interchangeability
Electromechanical devices
Electronic equipment and components
Link: BS EN IEC 60297-3-110:2018 Mechanical structures for electrical and electronic equipment. Dimensions of mechanical structures of the 482,6 mm (19 in) series Residential racks and cabinets for smart houses
Source: BSI Standards