Historical
IEC 60519-21 Ed. 1.0 b:1998
Safety in electroheat installations - Part 21: Particular requirements for resistance heating equipment - Heating and melting glass equipmen
Covers the safety aspects of electrical parts also in the case when electrical heating is combined with other means of heating, for example liquid fuel heating. Supplements and modifies the corresponding clauses in IEC 60519-2
International Electrotechnical Commission [iec]