This part of IEC 60384 applies to capacitors and resistor-capacitor combinations which will be connected to an AC mains or other supply with nominal voltage not exceeding 1 000 V AC (RMS) or 1 500 V DC, and with a nominal frequency not exceeding 100 Hz. The principal object of this part of IEC 60384 is to prescribe preferred ratings and characteristics and to select from IEC 60384-1, the appropriate quality assessment procedures, tests and measuring methods and to give general performance requirements for this type of capacitor. Test severities and requirements prescribed in detail specifications referring to this sectional specification will be of equal or higher performance level; lower performance levels are not permitted. This document also provides a schedule of safety tests to be used by national testing stations in countries where approval by such stations is required. The overvoltage categories in combination with the AC mains voltages for the capacitors classified in this document should be taken from IEC 60664-1.