This International Standard is applicable to electrical insulating blankets for the protection of workers from accidental contact with live or earthed electrical conductors, apparatus or circuits and avoidance of short circuits on electrical installations. Electrical insulating blankets in rolls having a width lower than 50 mm are not covered by this standard. NOTE 1 For a.c. electrical classification, as well as d.c. use, see 4.2. NOTE 2 This standard gives a.c. test provisions. There is limited history for use in d.c. applications. NOTE 3 See Annex A for suggested maximum voltage use