Tim,
Sure. In clause 3.2.3, “Permanently connected equipment”, it says:
“PERMANENTLY CONNECTED EQUIPMENT shall be provided with <either
>(strikethrough):
* a set of terminals as specified in 3.3; <or> (strikethrough)
* <a NON-DETACHABLE POWER SUPPLY CORD> (strikethrough)
PERMANENTLY CONNECTED EQUIPMENT having a set of terminals shall:”
This has been there since UL 1950 and CSA C22.2 No. 950 of old times.
The source of this omission is in the following US National Electrical Code
and Canadian Electrical Code, Part I sections:
NEC (2008), Article 400 – FLEXIBLE CORDS AND CABLES
“400.7 Uses Permitted.”
“(B) Attachment Plugs. Where used as permitted in 400.7(A)(3), (A)(6), and
(A)(8), each flexible cord shall be equipped with an attachment plug and shall
be energized from a receptacle outlet.”
“400.8 Uses Not Permitted. Unless specifically permitted in 400.7, flexible
cords shall not be used for the following:”
(1) As a substitute for the fixed wiring of a structure
(4) Where attached to building surfaces
(6) Where installed in raceways, except as otherwise permitted in this Code.
CSA C22.1, Canadian Electrical Code, Part I (2006),
4-010, Uses of flexible cords
(3) Flexible cords shall not be used
(a) as a substitute for the fixed wiring of structures and shall
not be
(i) permanently secured to any structural member;
Best Regards,
Don Gies, N.C.E
Senior Product Compliance Engineer
Alcatel-Lucent
Murray Hill, NJ 07974-0636 USA
________________________________
From: Haynes, Tim (SELEX GALILEO, UK) [mailto:tim.hay...@selexgalileo.com]
Sent: Thursday, November 20, 2008 4:03 AM
To: Don Gies; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: What's the deal with Wire Nuts?
Don, Hi.
In your response to Brian you said...
" However, written into the body of the IEC 60950-1 and EN 60950-1 (and other
national derivative standards) is a wiring method for permanent connection to
the mains not acceptable in the US and Canada – the use of a non-detachable
power supply cord for permanent connection. "
Can you please supply to me the reference that prohibits that wiring method in
US and Canada?
Regards
Tim
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