IEC 60085:1957 Withdrawn

Recommendations for the classification of materials for the insulation of electrical machinery and apparatus in relation to their thermal stability in service


Do you need a multi-user copy?



Describes recognized thermal classes for the insulation of electrotechnical products. Considers the thermal evaluation of insulation materials and systems, their interrelationship and the influence of service conditions. Defines the responsibility for assigning thermal identification and classification.

Additional information

Publication typeInternational Standard
Publication date1957-01-01
Available language(s)English/French, Russian
TC/SCTC 112 - Evaluation and qualification of electrical insulating materials and systemsrss
ICS17.220.99 - Other standards related to electricity and magnetism
29.035.01 - Insulating materials in general
File size1374 KB

The following test report forms are related:

Share this page

Share your publications

Learn how to share your publications with your colleagues, using networking options.

Payment information

Our prices are in Swiss francs (CHF). We accept all major credit cards (American Express, Mastercard and Visa), PayPal and bank transfers as form of payment.

Keep in touch

Keep up to date with new publication releases and announcements with our free IEC Just Published email newsletter.

Contact customer services

Please send your enquiry by email or call us on +41 22 919 02 11 between 09:00 – 17:00 CET Monday to Friday.