Hello Rich,
Thank you, I had hoped you would see this email :) I've ordered the Electrical Product Compliance and Safety Engineering book you recommended and will start looking into the other references. Much appreciated. All the best James James Pawson Managing Director & EMC Problem Solver Unit 3 Compliance Ltd EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy www.unit3compliance.co.uk <http://www.unit3compliance.co.uk/> | <mailto:ja...@unit3compliance.co.uk> ja...@unit3compliance.co.uk +44(0)1274 911747 | +44(0)7811 139957 2 Wellington Business Park, New Lane, Bradford, BD4 8AL Registered in England and Wales # 10574298 From: Richard Nute <ri...@ieee.org> Sent: 08 December 2022 01:17 To: 'James Pawson (U3C)' <ja...@unit3compliance.co.uk>; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Electrical Safety - Fundamental Standards and Concepts Hi James: Understanding the basic physics and rationale of the safety standards requires reverse engineering of the requirements. And an understanding of the people (and their biases) that wrote the standard. Very difficult. And, the safety standards are not necessarily in agreement with each other. For example, one would think that electric shock requirements are independent of the type of equipment, but they are not. (In my opinion, we should have a safety standard that addresses electric shock rather than equipment.) 60664-1 is largely based on research by Stimper. 60479 is largely based on research by Biegelmeier. 60990 has a good bibliography, although some of the references have been ignored. I would recommend the following sources: "Electrical Product Compliance and Safety Engineering," by Steli Loznen, Constantin Bolintineau, and Jan Swart. ISBN 13: 978-1-63081-011-5. Papers presented at the annual IEEE Product Safety Engineering Society "International Symposium on Product Compliance Engineering," 2004 to 2022. Join one or more national committees addressing product safety standards. IEC Technical Committee documents. UL "Bulletins of Research." No longer available from UL, but may be in some technical libraries. Articles by Charles Dalziel. Books by Dr. Vyto Babrauskas, Ph.D. (Dr. Fire.) Product Safety Newsletter, Product Safety Engineering Newsletter. "Electrical Shock Safety Criteria," Proceedings of the First International Symposium on Electrical Shock Safety Criteria 1st Edition - January 1, 1985. Editors: J.E. Bridges, G.L. Ford, I.A. Sherman. eBook ISBN: 9781483162201 With regard to electrically-caused fire in 62368-1, the PIS requirements come from 60065 and Ernst Storm (deceased). The 15-watt requirement came from me based on ignition tests. Thermal burns are not due to object temperature, but skin temperature. Standards requirements are object temperature. Have fun! Best wishes for the holiday season, Rich From: James Pawson (U3C) <ja...@unit3compliance.co.uk <mailto:ja...@unit3compliance.co.uk> > Sent: Wednesday, December 7, 2022 5:07 AM To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Electrical Safety - Fundamental Standards and Concepts Hello experts, My goal is to put together a reading and reference list of fundamental standards that help me understand the basic physics and rationale behind the requirements in safety standards (mainly EN 62368-1, EN 61010-1, EN 60335-1). I've been finding a lot of useful references from the Normative References sections of these standards and from the IEC TR 62368-2 explanatory notes. In your opinion, what standards should I add to this list to expand my knowledge of electrical safety? Thanks in advance James General Terminology <https://www.electropedia.org/> IEC 60050 IEV "Electropedia" although this is sometimes lacking Electric shock IEC 60664-1 "Insulation coordination for equipment within low voltage supply systems - Part 1: Principles, requirements and tests" IEC 60990-1 "Methods of measurement of touch current and protective conductor current" IEC 60479 series shock current on humans and livestock IEC 61201 Touch voltage limits Electrically caused fire Power source classification in 62368-1 references IEC 60065 and IEC 60950-1. But where did they derive their information from? What are the power levels based on? UL 94 and UL 1581 for material and cable flammability Thermal Burn Basic standards detailing risks of touch temperatures ISO 13732-1 and IEC Guide 117 Other? Radiation IEC 62471 "Photobiological safety of lamps and lamp systems" IEC 60065 for audio levels Other? Mechanical hazards ??? James Pawson Managing Director & EMC Problem Solver Unit 3 Compliance Ltd EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy <http://www.unit3compliance.co.uk/> www.unit3compliance.co.uk | <mailto:ja...@unit3compliance.co.uk> ja...@unit3compliance.co.uk +44(0)1274 911747 | +44(0)7811 139957 2 Wellington Business Park, New Lane, Bradford, BD4 8AL Registered in England and Wales # 10574298 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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