This can be a confusing issue. Here is my understanding of marks and labels. IEC 950 sec 1.7.1 clearly defines the "power rating label" and its required contents. These include mfr's name or trademark, type or model number, voltage/frequency/current, and the "double-box" symbol if Class 2. Section 1.7.1 also states "Additional markings are permitted, provided that they do not give rise to misunderstanding."
In other words, the contents of the power rating label are under the control of IEC 950, which "allows" for additional contents. No agency can insist that their mark be on the power rating label, only that it be on the product. Where space permits and confusion is avoided, it is not unusual to see some or all of the following added to the required content of the power rating label: EMC markings Agency marks CE marking Nordic grounding statement CDRH laser statement IEC 825 laser statement Company logo Country of origin (U.S. reqmnt) S/N and/or date of manufacture Energy Star The CE marking scheme reduced the number of Western European marks required. However, the total number of country marks required is rising as Central/Eastern Europe, Commonwealth of Independent States, Latin America, and the Pacific Rim are adopting mandatory approvals and marks. It seems that labels will either have to get much bigger, or a multitude of labels and/or stickers will decorate the back of most equipment. George Alspaugh Lexmark International
