In accordance with the Frankfurt Agreement, electrotechnical standards should preferably be drawn up at international level at IEC and adopted in parallel by CENELEC as identical European (EN IEC) standards. The adoption of IEC standards in Europe may, however, require amendments in order for the requirements of Single Market directives or regulations to be met.
The resulting deviation between the two standards is evident in that CENELEC then publishes these standards not as EN IEC 6xxxx, but only as EN 6xxxx – but with the same number as the corresponding IEC standard.
