This European Standard specifies the general service conditions and requirements for all electric equipment installed in power circuits, auxiliary circuits and control circuits etc. on rolling stock. NOTE 1 Certain of these rules may, after agreement between user and manufacturer, be used for electrical equipment installed on other vehicles such as mine locomotives, trolley-buses etc. The purpose of this standard is to harmonize as far as practicable all rules and requirements of a general nature applicable to electric equipment for rolling stock. This is in order to obtain uniformity of requirements and tests throughout the corresponding range of equipment