IEC 61851-22 specified the requirements for the a.c. electric vehicle charging station, the equipment sometimes known as a wallbox or a charging post that supplies alternating current to a vehicle for on-board charging. It defined the functions that the station must perform, the characteristics of its output under normal and fault conditions, the protection it must provide against electric shock and overcurrent, and the environmental and mechanical requirements applicable to equipment installed outdoors or in car parks, and it described the type tests by which compliance was demonstrated. The document has since been withdrawn; the requirements for a.c. charging stations have been incorporated into the general part of the conductive charging system series and into the harmonised product standards that now cover the supply equipment directly. A page retained for this part is therefore useful mainly as a record of legacy projects and of equipment approved under the earlier structure, and it should be marked as withdrawn with a clear pointer to the standards that now apply.