Is applicable to fully insulating spliced or hook ladders with extension or having a combination of insulating and conductive sections and used for live working on a.c. or d.c. electrical installations at 1 000 V and above for a.c. and 1 500 V and above
IEC 61478:2003 Referenced Document
IEC 60050-151:2001 International Electrotechnical Vocabulary - Part 151: Electrical and magnetic devices
IEC 60212:1971 Standard conditions for use prior to and during the testing of solid electrical insulating materials