This part of IEC 61851 together with Part 1 gives requirements for conductive connection of an electric vehicle (EV) to an a.c. or d.c. supply. It applies only to on-board charging units either tested on the complete vehicle or tested on the charging system component level (ESA – electronic sub assembly). This part of the standard covers the Electromagnetic Compatibility (EMC) requirements for electrically propelled vehicles in any charging mode while connected to the mains supply. This part of the standard is not applicable to trolley buses, rail vehicles, industrial trucks and 185 vehicles designed primarily to be used off-road, e.g. forestry and construction machines.