This standard applies to the mechanical design features for the installation of all electronic equipment as defined in EN 50155 and complying with HD 493. For individual or specialised equipment not complying with HD 493, no specified dimensions are defined; this type of equipment shall be designed to meet the particular requirements. These requirements for racks and enclosures do not exclude other solutions (e.g. single board mounting within an equipment box, future developments, etc.) This standard also covers particular requirements for the interconnection to the vehicle wiring.