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UL Directories provide listings of the common sets of UL tests.
UL's Standards contain the requirements used to investigate materials, components, products, and systems.
UL's Outlines of Investigation contain the requirements used to investigate materials, components, products, and systems.
An electronic document associated with a Standard or Outline of investigation, and issued by UL for a variety of reasons. CSDS Proposals are available in UL's Collaborative Standards Development System (CSDS). CSDS provides the proposals and accepts all comments through the CSDS Internet site.
Clarifications of requirements for future applications, and the applicability of requirements under specific circumstances.
UL Standards for Safety are continuously revised and updated – as changes are made and adopted to a standard, they are reflected in the revisions.
A document associated with a Standard or Outline of Investigation, and issued by UL for a variety of reasons
UL Differences contains variations in the associated standards
Sets of similar Standards sold and distributed as a package.
Papers on technical subjects developed by UL’s engineering staff.
UL Certification Requirement Decision (CRD) is prepared and published by Underwriters Laboratories (UL). It is normative for the applicable UL Product Certification Program(s)
UL Standards Interpretation are Official interpretations of an ANSI/UL Standard can only be made by UL. Interpretations are not appeal able.
UL Historical Standards
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