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Standards Corner - Appliance Advisor Issue 3 2019

Appliance Advisor Issue 3, 2019 Standards Corner


September 25, 2019

By Joe Musso, Standards Program Manager

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STP 507 – Electrical Fans: The task group formed to continue work on a proposal submitted from the Consumer Product Safety Commission (CPSC) to include a new thermal condition performance test for unattended fans, continues to make progress. CPSC is leading the task group (TG), which completed development of a proposal for consideration by the STP and public. The proposal was discussed at the STP 507 Meeting held Feb. 26, 2019, in Clearwater Beach, Florida. As a result of the meeting, the TG worked to further refine the proposal based on input received during the meeting. The proposal was circulated for preliminary STP and public review June 21, 2019, along with several unrelated proposal topics, closing for comments Aug. 21, 2019.

STP 982 – Motor-Operated Household Food Preparing Machines: A series of nine new proposal topics were posted for STP ballot in Q3 and Q4 2018. Topics address requirements related to the following:

  • Clarification of applicability of self-holding protector abnormal operation test
  • Smart-enabled machines
  • Vacuum blender
  • Feed opening accessibility
  • Electric knife unintentional operation
  • Interlocked blender cover opening equivalent area
  • Food processors with momentary contact switch
  • Input test
  • Soup-making blenders

Comments received during STP ballot of the above topics were discussed at the STP 982 meeting held April 25, 2019, at UL’s Northbrook, Illinois, office. Recirculation of topics with revisions based on the STP meeting discussion has been completed, with revisions to be published Q3 2019.

STP 1017 – Vacuum Cleaners, Blower Cleaners, and Household Floor Finishing Machines: A new revision cycle is underway. Work is ongoing, with a series of Technical Harmonization Committee (THC) meetings being held. Once the compiled draft proposals are ready, the next step will be to circulate the document for review by the consensus bodies and public.

STP 2595 – General Requirements for Battery-Powered Appliances: The new (third) edition of UL/CSA 2595, the Standard for General Requirements for Battery-Powered Appliances, has been developed and was circulated for preliminary STP review in 2018. The new edition will integrate, update and clarify a number of requirements, related to maximum rated voltages, use of general purpose batteries, general conditions of test requirements, normal charging of lithium-ion systems, power switches, and products powered or charged by USB power sources. A significant number of comments were received, which are currently being considered by the THC. The proposed new edition is anticipated to be posted for ballot in the third quarter of 2019.

STP 60335-2-40 –  Household and Similar Electrical Appliances – Safety – Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers: The international harmonization working group (CANENA 61D Work Group 10) addressed preliminary review comments received on the initial draft of the proposed new (third) edition. Upon completion of that work, the proposed new edition was circulated for STP ballot with a closing date of Feb. 5, 2019. The proposed new edition reached consensus with comments. The working group worked to address all comments, and a revised version of the proposed new edition was recirculated July 12, 2019, closing Aug. 26, 2019.

Call for Proposals and Working Group Volunteers

A new standards activity is in the early stages for UL 60335-2-89, the Standard for Household and Similar Electrical Appliances – Safety -, Part 2-89: Particular Requirements for Commercial Refrigerating Appliances and Ice-Makers with an Incorporated or Remote Refrigerant Unit or Motor-Compressor. This is a call for proposals. The UL standards development process is an open process, and the active involvement of those affected by the UL Standard is encouraged.

UL is inviting STP members, subscribers and any interested stakeholders to submit any proposed changes for UL 60335-2-89 via a proposal request in UL’s online Collaborative Standards Development System (CSDS). Proposals should be submitted by Sept. 30, 2019, at

On the CSDS homepage, you will find helpful information regarding the submission of proposals, UL’s standards development process and the STP process.

This is also a call for volunteers to participate in the THC that will prepare the draft of the next edition of UL 60335-2-89. This work will entail several face-to-face meetings as well as regular teleconference calls. If you are interested in participating, please contact Alan McGrath at Thank you for your participation in the UL standards development process.