Re: [PSES] Question for FCC Part 18 RE test?

Refer to FCC MP-5 for information regarding testing at distances other than what is specified in FCC Part 18. https://www.fcc.gov/general/equipment-authorization-measurement-procedures Bill Stumpf Technical Manager D.L.S. Electronic Systems, Inc. 847-537-6400 x281

[PSES] AW: [PSES] Safety: 60335-1 conflicting clauses question - earthing (or not) of handles

Hi James, actually, these two clauses address two different, but related risks: Clause 22.35 addresses the risk that the handle itself may become live. In any case, a conductive surface (like the handle) has to be separated from live parts by basic insulation. Due to the higher risk that

Re: [PSES] Antenna tilting or bore sighting for radiated emissions

Hi Larry, Thanks a lot for your insightful comments. Yes I'm familiar with the setup and with the antenna 3dB beamwidth. My question aims to help me estimate how much is it worth the investment in a mast with tilting or boresighting capability for our 3m semi-anechoic chamber. Most of the tests

[PSES] WG: AW: [PSES] AW: [PSES] Safety: 60335-1 conflicting clauses question - earthing (or not) of handles

Hi James, Please find below some additional thoughts on the subject that have accidentally been discussed off-list. Kind regards, Bernd Von: Dürrer Bernd Gesendet: Donnerstag, 6. April 2023 11:36 An: John Woodgate Betreff: AW: AW: [PSES] AW: [PSES] Safety: 60335-1 conflicting clauses

Re: [PSES] Low Voltage connectors called out on CCL

Hi Ryan; Could the connectors be considered as filling holes in the fire enclosure (or making up part of the enclosure)? -Ken A On Thu, Apr 6, 2023 at 2:09 PM Ryan Jazz wrote: > Hello Members, > > We have an audio amplifier being evaluated by a local NRTL to UL 62368-1 3 > rd Edition. > > The

Re: [PSES] Low Voltage connectors called out on CCL

Hi Ryan: UL makes some of its money through certifications. Regardless of product safety, components, including connectors, are certified; their required use in end-products justifies the requirement for certification of those components. So, this is one of those unwritten requirements.

Re: [PSES] Question for FCC Part 18 RE test?

If it is a Part 18 device the lab is probably misapplying FCC 15.31 (f)(2), which gives a 40 dB/decade factor. Part 18 is 20 dB, unless multiple distances are used as Tom pointed out below. Thanks, [ElementSignature] [cid:image554720.jpg@6ED1BEFC.58F12BBE] David Schaefer​ Technical Manager

[PSES] Low Voltage connectors called out on CCL

Hello Members, We have an audio amplifier being evaluated by a local NRTL to UL 62368-1 3rd Edition. The NRTL is calling out all the low voltage connectors on the rear panel on the Critical Components list. For example the XLR and TRS connectors. * Can someone please let me know where this

Re: [PSES] Low Voltage connectors called out on CCL

The NRTL should be compelled to point to the words in the standard that justify their demand. It should not be up to you to search for it. == Best wishes John Woodgate OOO-Own Opinions Only www.woodjohn.uk

[PSES] Multiple electrical power sources

A new question. A client's product is using two independent AC power sources on a product, but I can't find anything in 61010-1 60204-1 that provide any guidance on compliance. The obvious is that the sections of the product that are fed from source A or B are not interrelated in any way that

Re: [PSES] [EXTERNAL] Re: [PSES] Low Voltage connectors called out on CCL

Hello Rich, Like to thank you and the all the rest for your replies. We are still not out of the woods. It certainly help to have a copy of UL 62368-1 when trying to present reasons. (always with most standards) Sincerely, Ryan Jazz Ryan Jayasinghe Regulatory Compliance Engineer

Re: [PSES] Multiple electrical power sources

You might want to take a look at UL/IEC/EN 60950-1 which I know definitely has requirements for multiple power sources. 62368 may have guidance as well Get Outlook for iOS From: Richard Nute Sent: Thursday, April 6, 2023 8:15:02 PM To:

Re: [PSES] Multiple electrical power sources

Thanks for your responses. Sent from my T-Mobile 5G Device Original message From: Steve Brody Date: 4/6/23 4:41 PM (GMT-05:00) To: PSES List Server Subject: Multiple electrical power sources A new question. A client's product is using two

Re: [PSES] [EXTERNAL] Re: [PSES] Low Voltage connectors called out on CCL

Hello Ryan, Maybe connectors are filling opening in fire enclosure and therefore they have to have appropriate flammability class or approval according to relevant connector standard. It also depends on classification of the circuit they are connected to. If it is ES1/PS1 and connectors

Re: [PSES] Multiple electrical power sources

Hi Steve, Below is link to official ISO symbol for multiple power source. https://www.iso.org/obp/ui/#iec:grs:60417:6172 Best regards, Boštjan From: Richard Nute Sent: Friday, April 7, 2023 2:15 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Multiple electrical power sources CAUTION:

Re: [PSES] Multiple electrical power sources

Hi Steve: The TV broadcast industry electronic products have used two (redundant) AC sources for their products for many years. You may have some help there. Rich From: Steve Brody Sent: Thursday, April 6, 2023 1:42 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES]