IEC 60715:2017 specifies dimensional and functional requirements for the compatible mounting of switchgear, controlgear and accessories on some types of rails. This second edition cancels and replaces the first edition published in 1981 and Amendment 1:1995. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the electrical function of the rail for protective earthing is covered by the relevant product standard. b) the document has been editorially updated to bring it into compliance with the ISO/IEC Directives, Part 2:2016, and drawings have been updated to bring them in compliance with ISO tolerancing and drawing standards.It has the status of a horizontal standard in accordance with IEC Guide 108.