IEC 60519-1:2010 specifies the general safety requirements applicable to industrial electroheating installations. This fourth edition cancels and replaces the third edition published in 2003. It constitutes a technical revision. The main technical changes with respect to the previous edition are as follows: - scope and object have been modified, voltage limits and classification removed; - terms/definitions, normative references and bibliography have been updated and completed; - Clause 4 on classification of equipment according to process frequency has been modified; - Clause 5 (General requirements) has been redrafted and new provisions have been added (e