I am sure that UL would not make an issue of this - I have certainly mentioned it to UL engineers in the past, and have been told they would not prevent Listing of a product to UL1950 because of a green wire in a power cord - no more than they would prevent Listing of a product with an internal US NEMA socket/plug, where you can touch the pins during disconnection !!
Reagrds, John Crabb, Development Excellence (Product Safety) , NCR Financial Solutions Group Ltd., Kingsway West, Dundee, Scotland. DD2 3XX E-Mail :[email protected] Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. VoicePlus 6-341-2289. > -----Original Message----- > From: Loop, Robert [SMTP:[email protected]] > Sent: 06 November 2000 15:53 > To: [email protected] > Subject: UL1950 - Clause 2.5.5 > > > Group, > > We are looking at a Class 1, cord connected product that utilizes a NEMA > 5-15P plug on one end and is wired to a non-service accessible terminal > block in the rear of the unit with a Recognized compression fitting for > strain relief. The product is being evaluated against UL1950. > > Here's the problem: > > The manufacturer only wants to sell the product in the USA and is using a > UL > listed cordset with US color code (black/white/green). Clause 2.5.5 > requires that the ground wire be bare or green with a yellow stripe. They > have expressed an unwillingness to change out the cordset claiming ( in > which my experience agrees) that no one sells a cordset with > black/white/green-yellow color code. > > In order to meet the letter of the clause, we could require them to strip > the 1-1/2 " portion of the green wire that extends past the outer > jacketing, > but it seems like a backhanded way of meeting the Clause (does the bare > wire > make the product any safer?). > > I remember some clause in 1950 making reference to installing the product > "in accordance with the national wiring rules", but can't seem to locate > it. > If that's the case, and the NEC does recognize the black/white/green color > code, what's the best answer to resolve this? > > Your engineering expertise and enlightenment is always welcomed. > > > Sincerely, > Robert Loop > Engineering Supervisor > Wyle Laboratories > Product Safety > ph - (256) 837-4411 x313 > fax- (256) 721-0144 > e-mail: [email protected] > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: [email protected] > Michael Garretson: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
