• Available Formats
    • Options
    • Availability
    • Priced From ( in USD )
    • Secure PDF

      Secure PDF Files

      Secure PDF files include digital rights management (DRM) software. DRM is included at the request of the publisher, as it helps them protect their copyright by restricting file sharing. In order to read a Secure PDF, you will need to install the FileOpen Plug-In on your computer. The FileOpen Plug-In works with Adobe Reader and other viewers. Visit FileOpen to see the full list.

        What you can do with a Secure PDF:
      • Print
      • Search
      • Highlight
      • Bookmark
      Please note that some publishers - including BOMA, IADC and ICML - do not allow printing of their documents.

    • 👥
    • Immediate download
    • $15.43
    • Add to Cart
    • Printed Edition
    • Ships in 1-2 business days
    • $17.13
    • Add to Cart
    • Printed Edition + PDF
    • Immediate download
    • $21.60
    • Add to Cart

Customers Who Bought This Also Bought


About This Item


Full Description

Specifies a numerical system of classifying materials and systems based on their thermal endurance, ranging from Class 90 to Class 250 (in nine steps) thereafter in steps of 25, the figure indicating the assigned Celsius temperature. Retains the AS C320 alphabetical classifications Y, A, E, B, F and H (but not C) as an alternative for the time being. Describes the evaluation of long-term thermal properties of materials and of more complex insulation systems, and the influence of service conditions. Also defines the responsibility for assigning thermal identification and classification. Is based on, but differs from IEC 85 (1984) which specifies a part-alphabetical part-numerical system of classification and which permits alternative systems of identification of materials used in certain products.

Document History

  1. AS 2768-1985


    Electrical insulating materials - Evaluation and classification based on thermal endurance

    • Most Recent
  2. AS C320-1958

    Classification of insulating materials for electrical machinery and apparatus on the basis of thermal suitability in service

    • Historical Version