DIN EN 60335-2-8:2009
Household and similar electrical appliances - Safety - Part 2-8: Particular requirements for shavers, hair clippers and similar appliances (IEC 60335-2-8:2002, modified + A1:2005 + A2:2008); German version EN 60335-2-8:2003 + A1:2005 + A2:2008