UL 10377 (ND)

Abstract

Scope: Preface There are six types of National Differences as noted below. The difference type is noted on the first line of the National Difference in the standard. The standard may not include all types of these National Differences. DR - These are National Differences based on the national regulatory requirements. D1 - These are National Differences which are based on basic safety principles and requirements, elimination of which would compromise safety for consumers and users of products. D2 - These are national differences from ISO requirements based on existing safety practices. These requirements reflect national safety practices, where empirical substantiation (for the ISO or national requirement) is not available or the text has not been included in the ISO standard. DC - These are National Differences based on the component standards and will not be deleted until a particular component standard is harmonized with the ISO component standard. DE - These are National Differences based on editorial comments or corrections. DT - These are National Differences that are the result of pending changes that have been tentatively agreed internationally by committees for the next edition of the standard and therefore are expected outcomes of the next edition. These changes include both clarifications and substantive changes in requirements and that will be reviewed when the next edition is published. Each national difference contains a description of what the national difference entails. Typically one of the following words is used to explain how the text of the national difference is to be applied to the base ISO text Addition / Add - An addition entails adding a complete new numbered clause, subclause, table, figure, or annex. Addition is not meant to include adding select words to the base ISO text. Deletion / Delete - A deletion entails complete deletion of an entire numbered clause, subclause, table, figure, or annex without any replacement text. Modification / Modify - A modification is an altering of the existing base ISO text such as the addition, replacement or deletion of certain words or the replacement of an entire clause, subclause, table, figure, or annex of the base ISO text.