Robert, consider invoking clause 1.4.1 which says that a requirement or test
is not required if safety is not affected.
Richard Woods
----------
From: Loop, Robert [SMTP:[email protected]]
Sent: Monday, November 06, 2000 10:53 AM
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]
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For help, send mail to the list administrators:
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