Not familiar with CISPR 12, so looked it up.
CISPR 12 CISPR 12:2025 Vehicles, boats and devices with internal combustion engines or traction batteries – Radio disturbance characteristics – Limits and methods of measurement for the protection of off-board receivers CISPR 12:2025 The limits in this document are designed to provide protection in the frequency range of 30 MHz to 1 000 MHz for off-board receivers. Compliance with this document does not guarantee adequate protection for receivers nearer than 10 m to the vehicle, boat or device. This document applies to the emission of electromagnetic energy that can cause interference to radio reception and which is emitted from: 1) vehicles propelled by an internal combustion engine (ICE), electrical means or both (see 3.1.34); 2) boats propelled by an ICE, electrical means or both (see 3.1.4). Boats are tested in the same manner as vehicles except where they have unique characteristics as explicitly stated in this document; 3) devices equipped with ICE (see 3.1.9). In the case of hybrid devices (e.g. equipped with both ICE and traction batteries), only the ICE mode is included in this document; 4) inboard and outboard boat engines and motors [i.e. equipped with ICE, electric motor (EM), or both], when marketed independently. See Annex D for a flow chart and a list of examples to help determine the applicability of CISPR 12. This document does not apply to aircraft, household appliances, medical devices, traction systems (railway engine or locomotive, streetcar or tram and electric trolley bus), vehicle, boat and device off-board chargers or to incomplete vehicles, boats and devices. In the case of a dual-mode trolley bus (e.g. propelled by power from either AC/DC mains or an ICE), the ICE propulsion system is included, but the EM propulsion portion of the vehicle is excluded from this document. In addition, domestic helper robots, such as household cleaning robots, hotel service robots and personal safety robots are also excluded from the scope of this document. NOTE 1 Other than inboard or outboard boat engines and motors that are marketed independently, this document does not apply to components or incomplete products, such as an ICE, an incomplete vehicle or boat that has not yet been fitted with an ICE or EM, or spare parts. This document only applies to the final product, which is equipped with all applicable parts and components to be able to function as intended. NOTE 2 Appliances without ICE for typical housekeeping and service functions in the household and similar environment are covered by the requirements of CISPR 14-1[1]. NOTE 3 Protection of receivers used on board the same vehicle as the disturbance source(s) are covered by CISPR 25[2]. This document does not prescribe measurement methods or limits for conducted disturbances, for the charging mode of operation, where the (electric or hybrid) vehicle or boat is connected to power mains, either directly (i.e. plug-in vehicle or boat) or indirectly (i.e. wireless power charging). The user is referred to appropriate IEC and CISPR standards, which define measurement techniques and limits for this condition. It appears that the intent is to protect offboard receivers from EMI from the vehicle at a distance of ten meters. This is specifically for equipment that is part of the platform. So my take on it is that based on your description, CISPR 12 doesn’t apply at all. One thing I don’t understand is your description of conducted emission issues, whereas Note 3 says CISPR 12 is only for radiated emissions. -- Ken Javor Ph: (256) 650-5261 Hello, We market an EV charger to the N. American market. We've been contacted by major automotive OEMs for partnerships, some white labeling, etc. Recently, one decided to test a charger in chamber with an EV to CISPR12 levels, even though it's an off-board charger qualified as a residential appliance. So, while the unit passes FCC Class B emissions, some testing during EV charging shows emissions above CISPR12 limits. We and our potential customer are trying to reason out why the unit failed, and what are the implications for passing FCC Class B, while not passing CISPR12. The way I like to approach sticky issues on the edge of compliance is to identify and address the hazard posed. So, with EMC emissions some number of dB(uV) above those limits (all towards the low end of allowed conducted limits, < 200 kHz), in a typical residential installation on or near a garage, and typical usage, i.e., not closely attended for any extended length of time: what are the hazards or risks posed? Not being much of an EMC guy, I've never really had to think too much on this issue. Being a long time safety guy, I have NEVER had an issue related to EMC from which to draw experience. What say you, my colleagues? Colorado Brian From: Brian Gregory <[email protected]> Reply-To: ***** IEEE emc-pstc List ***** <[email protected]> Date: Friday, August 22, 2025 at 1:46 PM To: <[email protected]> Subject: [PSES] Hazards, risks with EMC emissions? 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://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf 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://pses.ieee.org/wp-content/uploads/2024/12/EM-PSTC-List-Rules.pdf 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
