Interpretations
The interpretation by the standards development organization of an identical or equivalent
standard is based on the literal text to determine compliance with the standard in accordance
with the procedural rules of the standards development organization. If more than one
interpretation of the literal text has been identified, a revision is to be proposed as soon as
possible to each of the standards development organizations to more accurately reflect the
intent.
CSA effective date
The effective date for CSA International will be announced through CSA Informs or a CSA
Certification Notice.
UL effective date
The effective date for UL is available on UL’s website at www.ul.com.
General
National differences from the text of the International Electrotechnical Commission (IEC)
Publication 60950-1, Information Technology Equipment – Safety – Part 1: General
Requirements, Copyright 2005, are indicated by the following margin notations:
There are six types of national differences, as noted below. The national difference type is noted
in the margin next to the affected text. The standard may not include all types of these national
differences.
D1 – national differences based on national regulatory requirements which result in
equivalent or more stringent requirements than in IEC 60950-1.
D2 – national differences based on other than national regulatory requirements which
result in equivalent or more stringent requirements than in IEC 60950-1.
DI – national differences based on IEC final draft international standards (FDIS). DI
national differences may be less stringent than, equivalent to, or more stringent than
requirements in IEC 60950-1.
DC – national differences based on UL and CSA component requirements. DC
national differences may be less stringent than, equivalent to, or more stringent than
component requirements in IEC 60950-1.
D3 – national differences based on bi-national requirements which result in less
stringent requirements than in IEC 60950-1.
DE – editorial national differences that correct typographical errors in IEC 60950-1 or
revise the terminology, but do not alter the technical intent of the requirements. This
notation is also used for informative statements such as the Preface.
National differences have been incorporated into the body of the standard. If national differences
necessitate the deletion of IEC 60950-1 text, the IEC 60950-1 text has been retained but has
been lined out. Except for tables and figures and annexes, text added as a result of national
differences has been underlined. Text added as the Preface is not underlined.
MARCH 27, 2007CAN/CSA-C22.2 NO. 60950-1-07 ♦ UL 60950-110
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
DE
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