This standard specifies general safety requirements for mini-couplers with a rated current of max 16 A and a rated voltage of 250 V a.c. single phase@ applied for the connection or interconnection of mains supplied equipment in road vehicles@ e.g. to supply electrical pre-heaters for engines@ starter battery chargers and cab heaters. This standard may also be used for mini-couplers for other similar applications. The standard does not apply to: devices used in flexible supply cables for the connection of household electrical appliances and the like to their supply; - charging of electric vehicles; or - Adaptors@ which are considered to be not allowed.