文档介绍：UL 746C
ISBN 1-55989-949-2
Polymeric Materials – Use in
Electrical Equipment
Evaluations
FEBRUARY 12, 2001 − UL 746C tr1
Underwriters Laboratories Inc. (UL)
333 Pfingsten Road
Northbrook, IL 60062-2096
UL Standard for Safety for Polymeric Material – Use in Electrical Equipment Evaluations, UL 746C
Fourth Edition, Dated December 27, 1995
Revisions: This Standard contains revisions through and including February 12, 2001.
These pages are being issued to correct ommisions that occurred with the October 16, 2000 pages.
UL is in the process of converting its Standards for Safety to the Standard Generalized Markup Language
(SGML), and implementing an pliant document management and publishing system. SGML -
an international standard (ISO 8879-1986) - is a descriptive markup language that describes a document’s
structure and purpose, rather than its physical appearance on a page. Significant benefits that will result
from UL’s use of SGML and these new systems include increased productivity, reduced turnaround times,
and data and information consistency, reusability, shareability, and portability. However, the fonts,
pagination, and general formatting of UL’s new electronic publishing system differ from that of UL’s
previous publishing system. Consequently, when revision pages are issued for a Standard with the new
publishing system, these differences may result in the printing of pages on which no requirements have
been changed - these additional pages result from relocation of text due to repagination and reformatting
of the Standard with the new publishing system.
Text that has been changed in any manner is marked with a vertical line in the margin. Changes in
requirements are marked with a vertical line in the margin and are followed by an effective date note
indicating the date of publication or the date on which the changed requirement es effective.
The following table lists the future effective dates with the corresponding item.
Future Effec