Note: If you are looking for IEC 60099-4 (which covers testing procedures) or other parts of the series, the purchasing channels remain the same.
The modern utility industry benchmark, as cross-referenced in IEC 60099-4 . iec 600995 pdf link
: Offers the British adoption, BS EN IEC 60099-5:2018 . Note: If you are looking for IEC 60099-4