John The device might use a battery, but I would have thought that IEC 60335-1 and IEC 60335-2-17 would be better standards to apply considering their scope:
IEC 60335-2-17:2012+A1:2015+A2:2019 deals with the safety of electric blankets, pads, clothing and other flexible appliances that heat the bed or human body, for household and similar purposes, their rated voltage being not more than 250 V. This standard also applies to control units supplied with the appliance. Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used in beauty parlours or by persons in cold ambient temperatures, are within the scope of this standard… Best regards Charlie Charlie Blackham Sulis Consultants Ltd Tel: +44 (0)7946 624317 Web: https://sulisconsultants.com/ Registered in England and Wales, number 05466247 From: John Allen <jral...@productsafetyinc.com> Sent: 05 October 2022 16:18 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Wearables and UL 62368 vs UL 964 Electrically Heated Bedding Hi, I hope everyone is well and happy 😊. I’m hoping I can get some input on my thinking for a heated garment powered by a battery pack. 1. The heater is insulated. 2. The fabric it is in contact with is combustible. 3. The circuit is PS2 – 16W 4. I read UL 62368 Clause 6.4.5.2 as the fabric must not ignite under a single fault and it must be UL 94VTM. Am I correct? Also, in researching other “fabric” products, I found UL 964 Electrically Heated Bedding. Following is a summary of how they manage fabric and heating elements – 1. Sec. 6 Covering of Electrical Parts – All electrical parts shall be covered (except the connector attached to the bedding) with a “shell” or other fabric with no openings. 2. The heating element shall not be in direct contact with the shell. It shall be insulated with UL AWM. 3. There shall not be any sharp edges in contact with the shell. 4. There is a very elaborate flammability test on the shell. Wash it in special soap, let it dry then flame test it. It does not seem equivalent to UL 94 testing. 5. There’s also an “Ease of Ignition” test with a hot plate. Is UL 62368 missing some requirements in regard to Wearables that are made of fabric?? Wearable Technology Standards: * Wellness or Non-Medical Wearable: IEC/UL 62368-1 https://www.ul.com/services/wearable-technology-testing-and-certification I would appreciate any input you can provide. Best Regards and Be Safe, John John Allen | President & CEO | Product Safety Consulting, Inc. Your Outsourced Compliance Department® 630-238-0188, Cell: 630-330-3145 [1496245974387_PSC] www.productsafetyinc.com<http://www.productsafetyinc.com/> John Allen | IEEE Product Safety Engineering Society President 2016-2019, Past President 2020-2021, BoG Director at Large 2020-2023 Chairman – Compliance 101 Technical Committee IEEE Senior Member Keeping our members informed and educated on Product Safety and Certifications [cid:image002.png@01D8D8E0.69CBAFA0] https://ewh.ieee.org/soc/pses/index.html Although PSC maintains the highest level of virus protection, this e-mail and any attachments should be scanned by your virus protection software. It is the responsibility of the recipient to check that it is virus free. PSC does not accept any responsibility for data loss or systems damage arising in any way from its use. This message is confidential and intended only for the individual to whom or entity to which it is addressed. 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