Standard:Clause 23.3 and 25.14 of IEC 60335-1 Household and similar electrical appliances – Safety – Part 1: General requirements, IEC60335-2-14 and etc.
It is used to check that the supply cord of the small household appliances (such as Coffee pot / electric iron) and lamps is adequately protected against excessive flexing where it enters the appliance.
Household Appliance Supply Cord Flexing Test Apparatus