UL 98, Standard for Safety for Enclosed and Dead-Front Switches

Effective December 31, 2018

Standard Information
Standard Number:
UL 98
Standard Name:
Standard for Safety for Enclosed and Dead-Front Switches
Standard Edition and Issue Date:
14th Edition Dated February 12, 2016
Date of Revisions:
February 12, 2016
Date of Previous Revisions to Standard:
13th Edition Revised October 10, 2014
Effective Date of New/Revised Requirements

Effective Date: December 31, 2018

Impact, Overview, Fees and Action Required

Impact Statement: A review of all Listing Reports is necessary to determine which products comply with new/revised requirements and which products will require re-evaluation. NOTE: Effective immediately, this revised standard will be exclusively used for evaluation of new products unless the Applicant requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.

Overview of Changes: The marking change is only for double throw switches investigated for use in optional standby systems. Specific details of new/revised requirements are found in table below. The changes described below are based on UL’s announcement dated March 30, 2016.

If the applicable requirements noted in the table are not described in your report(s), these requirements will need to be confirmed as met and added to your report(s) such as markings, instructions, test results, etc. (as required).

Client Action Required:

Information – To assist our Engineer with review of your Listing Reports, please submit technical information in response to the new/revised paragraphs noted in the attached or explain why these new/revised requirements do not apply to your product (s).

Current Listings Not Active? – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records. We will do this at no charge as long as Intertek is notified in writing prior to the review of your reports.

Description of New/Revised Technical Requirements
9.2.63 The change is only for double throw switches investigated for use in optional standby systems. The revised clause is as follows (underlined verbiage is new): “Manually-operated switch suitable for use in optional standby power systems in accordance with ______”. (where the “blank” is to be filled in with the appropriate text from Annex A, Ref. No. 1).

CUSTOMERS PLEASE NOTE: This Table and column "Verdict" can be used in determining how your current or future production is or will be in compliance with new/revised requirements.