Standards and Outlines of Investigation -- UL's Standards and Outlines of Investigation contain the requirements used to investigate materials, components, products, and systems for determining the eligibility of the material, component, product, or system to use UL's Listing, Classification, or Recognition Mark, or other UL Mark that may be required.

Outlines of Investigation (Outline) – An Outline of Investigation is a collection of requirements based upon UL's investigations of a few products, and UL's first step toward development of a UL Standard.

Published Standards -- A Standard that has cleared UL's standards development procedures, and has been formally adopted and published as a UL Standard for Safety.

Hardcopy Published Standards (Standard) -- A Published Standard that that is provided in a hardcopy, printed format. A Published Standard consists of the current version of the Standard plus any published or adopted revisions that have been issued on or before the date the Standard is shipped. NO future revisions or proposals are provided.

Published Electronic Standards (Electronic Standard)-- An electronic version of a UL Published Standard delivered via the Internet. A Published Electronic Standard consists of an electronic file containing the complete text of the current version of the Published Standard, including all figures, equations, formulas, indexes, supplements, and appendixes. Any published or adopted revisions that have been issued on or before the date the Electronic Standard is shipped are merged into the text of the Standard. NO future revisions or proposals are provided.

Revisions -- UL Standards for Safety are continuously revised and updated – for example, to keep them abreast of technological advances and of field experience with the product category. Furthermore, because nationally recognized installation and use codes – with which UL Standards are intended to be compatible – are periodically revised to meet changes in the state of the art and conditions of use, UL Standards for Safety must be correspondingly revised. A UL Standard is current only if it incorporates the most recently adopted revisions. Revisions are available in only a hardcopy, printed format.

Bulletins (Bulletins) -- A document associated with a Standard or Outline of Investigation, and issued by UL for a variety of reasons:

• to report the results of a UL/industry meeting,

• to propose:

  • A revision of a single requirement.
  • A revision of a number of requirements amounting to less than a complete new edition of an existing UL Standard for Safety or Outline of Investigation.
  • A draft new Standard or Outline that has not previously been published.

• announce the adoption of new and/or revised requirements,

• provide information related to the use of the Standard or Outline

Proposed Standards (Proposals) – A UL draft standard that has not yet reached the Published Standard stage, or a proposed subsequent edition of a Published Standard. These drafts are issued for review and comment, and are in the final stages of becoming a Published Standard for Safety. A proposed revision of a single requirement, or a number of requirements amounting to less than a complete new edition of a Standard is not considered a Proposed Standard. A Proposed Standard is also called a Proposal.

Historical Material -- Superceded or withdrawn, previously published UL Standards and revised pages, bulletins, and announcements issued for these Standards; and prior editions of existing UL Standards and revised pages, bulletins, and announcements issued for the edition. Available only in a hardcopy, printed format.

Standards Sets -- Sets of similar Standards and/or Outlines sold and distributed as a package. The Standards in a set generally cover one or a group of similar components, products, or systems; and are often used together, in whole or in part, during the investigation of these components, products, or systems. Provided in hardcopy and electronic format.

Practical Application Guidelines(PAG) -- Clarifications of requirements for future applications, and the applicability of requirements under specific circumstances.

UL Certification Requirement Decision (CRD) -- 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 Formal Interpretations -- UL Formal Interpretations are Official interpretations of an ANSI/UL Standard can only be made by UL. Interpretations are not appeal able

Standards Subscription Service -- A three-year subscription service that provides the following material during the term of the:

• All reports of UL/Industry meetings pertaining to the Standard.

• All new and/or revised requirements issued for the Standard.

• A new edition if issued.

• Access to UL's Collabrotive Standards Development System to review proposals and provide comments for the Standards or Outline covered by the subscription.

Annual Standards Program – A yearly service that provides all of a subscribers Standards needs for a year at a fixed annual cost. Provided are:

• All reports of UL/Industry meetings pertaining to the Standard.

• All new and/or revised requirements issued for the Standard.

• A new edition if issued.

• National difference document, as applicable, for the Standards covered by the service, not including the 60065 or the 60950 series.

• Access to UL's Collaborative Standards Development System to review proposals and provide comments on the covered Standards and/or Outlines..

Test Equipment

• Rain Test Nozzle -- used in the simulated rain tests in UL's Standards.

• Sharp Edge Tester and Sharp Edge Tester Kit -- used to determine if an edge is sharp enough to cause a cut-type injury.

• UL Articulate Probe -- used to evaluate the accessibility of live parts or moving parts through openings in an enclosure.

• IEC Flexible Test Finger -- used to evaluate the accessibility of live parts or moving parts through openings in an enclosure.

CSDS Proposals - An electronic document associated with a UL Standard for Safety or Outline of Investigation, and issued by UL to propose:

• A revision of a single requirement
• A revision of a number of requirements amounting to less than a complete new edition of an existing UL Standard for Safety or Outline of Investigation.
• A revision of requirements mounting to a complete new edition of an existing UL Standared or Outline.
• A draft new Standard or Outline that has not previously been published.

National Differences - A compilation of the national differences, other than editorial differences, that have been identified for the specific IEC-based UL standard. The national differences represent those modified or additional requirements that apply in the US. The national differences for each IEC-based standard are also contained within the published UL version ofthe IEC standard. This document is not available for the 60065 or 60950 series.

Miscellaneous Products

Visit UL Standards on ul.com for access to UL’s current Catalog of Standards for Safety and Product Index -- provides up-to-date information pertaining to UL’s various Standards activities, such as, information about new editions, revisions, proposed Standards, proposals, and Outlines of Investigation; a list of UL Standards approved by ANSI and the DoD; UL/CSA and UL/IEC harmonized Standards, the scope of each Standard and Outline of Investigation, and other related information.