Hmmm . . . you didn't specify the category of equipment, but from the perspective the UL standard 1950 (ITE) Clause 1.2.4.1 defines Class I equipment as:
"Equipment where protection against electric shock is achieved by: a) using BASIC INSULATION, AND also b) providing a means of connecting the protective earth conductor in the building wiring those conductive parts that are otherwise capable of assuming HAZARDOUS VOLTAGES if the BASIC INSULATION fails. NOTES 1. Class I equipment may have parts with DOUBLE INSULATION or REINFORCED INSULATION, or parts operating in SELV circuits. 2. For equipment intended for use with a power supply cord, this provision includes a protective earth conductor as part of the cord." NOTE 2 is clear that a protective earth conductor should be part of the cord. To me, this is a basic design issue . . . and not likely limited to UL 1950 . . . That customer should recheck there info source. My opinion only . . . John Juhasz Fiber Options Bohemia, NY -----Original Message----- From: Enci [mailto:[email protected]] Sent: Wednesday, May 16, 2001 11:47 AM To: [email protected] Subject: US Mains Plug/Earthing I am in the UK, a customer in USA wants us to fit 2 pin mains plugs to the Class 1 appliances he is going to be buying from us. He is very firm that there are no regulations in US that requires this to be so. Is that true? Thank you. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
