DIN EN 60335-2-12:2021
Household and similar electrical appliances - Safety - Part 2-12: Particular requirements for warming plates and similar appliances (IEC 60335-2-12:2002 + A1:2008 + A2:2017); German version EN 60335-2-12:2003 + A1:2008 + A11:2019 + A2:2019