What is this standard about?
This Part 501 of IEC 60811 gives the procedure for determining the mechanical properties, which typically applies to cross-linked and thermoplastic compounds used for insulating and sheathing materials.
EN 60079-1:2014
EN 60811-501:2012/A1:2018
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IEC 60079-1:2014
IEC 60811-501:2012/AMD1:2018