My understanding as well.Thanks John.Sent from my T-Mobile 5G Device -------- Original message --------From: John Allen <[email protected]> Date: 10/29/24 9:45 PM (GMT-05:00) To: Steve Brody <[email protected]>, [email protected] Subject: RE: [PSES] Circuit Breakers
Hi Steve, My understanding is Branch Circuit Protection vs Supplementary is not dependent on the device it’s protecting. It’s based on where in the grid you are installed. The way I think about it is branch circuit protection is used to provide wire protection from the transformer outside a building/residence and supplementary protectors are used to provide equipment protection. So, if your motors are internal, Supplementary should be adequate. Lol, what’s the Standard say?? Here’s a video that seems okay. Not thoroughly review for accuracy - https://rspsupply.com/education/a-8-supplementary-breakers-vs-branch-breakers/?srsltid=AfmBOoo6qms4NXcbK1KV7SkFCny1UZh1FMYzjSfPUQe3PFi6pDCmU40I 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 https://www.youtube.com/channel/UCVSzENmSoWeNFSBQcOYN7-A www.productsafetyinc.com IEEE Product Safety Engineering Society President 2024-2025 Compliance 101 Technical Committee Chairman IEEE Senior Member Keeping our members informed and educated on Product Safety and Certifications 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. If you are not the intended recipient or addressee, or an employee or agent responsible for delivering this message to the addressee, you are hereby notified that any dissemination, distribution, or copying, in whole or part, of this message is strictly prohibited. If you believe that you have been sent this message in error, please do not read it. Please immediately reply to sender that you have received this message in error. Then permanently delete all copies of the message. Thank you From: Steve Brody <[email protected]> Sent: Tuesday, October 29, 2024 8:32 PM To: [email protected] Subject: [PSES] Circuit Breakers [EXTERNAL EMAIL] DO NOT CLICK links or attachments unless you recognize the sender and know the content is safe. Some clarification and/or education required. A client has a product that has an PDU that has a UL 489 CB where the branch circuit enters the PDU. All other CBs are UL 1077 supplementary protectors downstream from there. One of the downstream circuits with a UL 1077 supplementary protector is for internal servo motors, AC and DC. My understanding was that as long as the motors are not external to the product, that a 1077 device is OK for circuit protection in this scenario. Is this correct or am I wrong? Sorry I can't provide a circuit diagram. Thanks, Steve Brody [email protected] C - 603 617 9116 This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher at: [email protected] To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
