Rubber insulated cables of rated voltages up to and including 450/750 V - Part 9: Single-core non-sheathed cables for fixed wiring having low emission of smoke and corrosive gases HD 22.9 S1:1992
Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)