This specification applies to aluminuim electrolytic capacitors with non-solid electrolyte primarily intended for a.c. motor starting applications. It covers capacitors for connection to windings of asynchronous motors supplied from a single-phase system having a frequency of up to and including 100 Hz, with rated voltages up to and including 500 V.It prescribes preferred ratings and characteristics and selects from the specification EN 137000 the appropriate quality assessment procedures, tests and measuring methods and gives general performance requirements for this type of capacitor.