Gary, It may depend on which standard you are using to certify your product. Here are 3 references from an investigation I performed in 2014:
1. UL 60950-1, Annex NAE, Clause 3.2.5, Cord-connected equipment - "The length of a power supply cord shall not exceed 4.5 m (14.76 ft)" [NEC 400.8, 645.5(B)] 2. UL 60950-1, Annex NAE, Clause 3.2.5, Cord-connected equipment - "The minimum length of a power supply cord shall be 1.5 m unless it is intended for a special installation, such as dedicated equipment intended to be mounted near a receptacle. ..." [NEC 210] 3. US National Electrical Code Handbook 2008 Section 210.52 - "Receptacles are required to be located so that no point in any wall space is more than 6 ft (1.83 m) from a receptacle. This rule intends that an appliance or lamp with a flexible cord attached may be placed anywhere in the room near a wall and be within 6 ft (1.83 m) of a receptacle, thus eliminating the need for extension cords. ..." (emphasis added) Gregory H. McClure Lexmark Product Safety Product Safety Team Lead 859-232-3240 office From: Darnel, Gary <gary.dar...@thermofisher.com> Sent: Wednesday, September 9, 2020 11:51 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Question - not EMC I have a general question, I hope someone here knows the history on it. Is there is a length restriction on power cords for instruments? I am not referring to extension cords. But either hard connected cord, or the the removeable C13/C14 style cords? If so, what is it, and why is it? Discounting the EMC issues, what, if any, is the safety issue with a long power cord? Which standards spell out this length? What testing or rationale supports this? Many thanks, Regards, Gary Gary Darnel, P.Eng. Senior R&D Engineer Laboratory Automation - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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