An external Class B PSU is identified under the verification process and the marking for the PSU is required.
Section 15.101 (a) Class B external switching power supplies Verification. I see many supplies with the FCC logo however this is a misused as the FCC logo is limited to products approved under the DoC process, All other devices shall bear the statement. Section 15.19 (5) (b) Products subject to authorization under a Declaration of Conformity shall be labelled as follows: (1) The label shall be located in a conspicuous location on the device and shall contain the unique identification described in ยง2.1074 of this chapter and the following logo: (i) If the product is authorized based on testing of the product or system; or [eCFR graphic er09de03.000.gif] on the other hand if sold with the system, then FCC states peripherals attached by cable do not need to be marked, and marking on the main unit is sufficient. Section 15.19 (4) Where a device is constructed in two or more sections connected by wires and marketed together, the statement specified under paragraph (a) of this section is required to be affixed only to the main control unit. The marking requirements of the PSU is really dependent on how it is marketed and placed on the market Comments suggestion welcomed. Rodney Davis ________________________________ From: Mark Bailey <mbai...@crfs.com> Sent: Wednesday, April 6, 2016 5:51 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Desktop Power Supplies Dear group, a quick question regarding selling desktop power supplies into the USA as part of a system. If I buy an off the shelf desktop PSU to power my product (unintentional radiator) to sell into the USA does the desktop PSU need to be marked with the FCC logo or verification wording? As part of the system compliance testing the desktop PSU will be included in the desktop test set-up for radiated emissions and we'll do AC port conducted emissions.testing. Assuming the system passes I can then put the appropriate mark/ wording on my product but am I also required to put the same mark/ wording on the PSU or as the PSU will only ship with the end product/ system do I mark my part of the system and use my emissions test reports (that will list the desktop PSU) to demonstrate that the desktop PSU used with my product meets the FCC requirements? Marking the off the shelf desktop PSU seems like a bad idea to me, but it also seems odd to ship the PSU with no EMC marking. Best regards -- Mark Bailey Approvals Engineer CRFS Limited mbai...@crfs.com<mailto:mbai...@crfs.com> www.crfs.com<http://www.crfs.com/> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
