IEC 60519-4:2013 provides particular safety requirements for electric arc furnace installations and its operating and maintenance personnel. These safety provisions concern the protection of persons and the environment against dangers of electrical origin and also against certain dangers of non-electrical origin. This fourth edition cancels and replaces the third edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - The structure has been amended and adjusted to IEC 60519-1:2010; - The classification (Clause 4) has been adapted to details with respect to secondary voltage in electric arc furnace installations; - All provisions have been redrafted and the text is more concise with respect to EAF; - Annexes AA, BB and CC have been restructured, with respect to details concerning high voltage designs and non-electrical issues, however to be aware of in those installations. This publication is to be read in conjunction with IEC 60519-1:2010.