Table 2G of IEC 60950, Insulation Application


Insulation Calculator

This program  is based on Table 2G and Figure 2F of IEC 60950.  Select the circuits that bridge the insulation to be determined by using the drop down lists.  For example, a Primary Circuit to a Primary Circuit requires Functional Insulation.  The Insulation Calculator will automatically determine the insulation.  Notes are also provided as called out in Table 2G.

Applicable Standards

Insulation, Clearance, and Creepage are in accordance with:

  • IEC 60950 Third Edition, 1999-04
  • IEC 60950-1, 2001
  • EN 60950:2001
  • UL 60950, Third Edition
  • UL 60950-1
  • CAN/CSA-C22.2 No. 60950-00, Third Edition


    The author thanks the International Electrotechnical Commission (IEC) for permission to reproduce Section 2.9 "Insulation", Section 2.10 "Clearances,  creepage distance and distances through insulation", and Section 5.2 "Electric Strength" from its International Standard IEC 60950. All such extracts are copyright of IEC, Geneva, Switzerland. All rights reserved. Further information on the IEC is available from  IEC has no responsibility for the placement and context in which the extracts and contents are reproduced by the author; nor is IEC in any way responsible for the other content or accuracy therein.


    Consult with IEC 60950 for all final design decisions.

    These calculators are provided AS IS without warranty of any kind. Lorusso Technologies, LLC  further disclaims all implied warranties. The entire risk arising out of the use or performance of these calculators and documentation remains with you.

    In no event shall Lorusso Technologies, LLC, and its authors, be liable for any damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or other pecuniary loss) arising out of the use of or inability to use the calculators, even if Lorusso Technologies, LLC has been advised of the possibility of such damages.

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