I speak from my perspective. I don't work for UL.
UL listing essentially means that the item listed is safe for it's
intended use. UL, as others have noted, doesn't approve anything. In
my employers case, all the stuff we have is put on our listing. It's
UL listed. I must further note that the amount of testing our
products endure is considerably less that starting from scratch since
most of the componentry is UL recognized. Switches, wires, the
plastics inside, transformers and so on. The manufacturer of each
item has already done their part of the UL testing process. I shudder
to think of the rigorous testing one my designs would endure were I to
need to test each and every component exhaustively. The listing
process is made considerably easier by the plastic having a yellow
card. By the switch itself being recognized. And so on.
What my design has to do is be safe (won't cause harm) to the user.
UL is not concerned if my device actually does the function I intend
it to do. Just be safe. That's it.
Again, I urge the OP to contact UL directly to determine what would
actually have to happen if he really want's to get his project listed.
IMHO it may not be worth the effort for a few hundred units. But what
do I know? I'm not in the OPs business.
On Fri, 05 Mar 2004 01:21:25 GMT, patriarch
|I have a problem that's come up at work.
|We are being asked to build a custom display light that uses off the
|shelf electrical components that will be enclosed by a melamine box.
|The customer wants the unit to have a UL approval sticker on it (This
|product meets the UL962 standard for household and commercial
|We'd be making several hundred of these and I have no clue of how to
|estimate the time or cost of getting the UL approval.
|Any of you guys have experience with this sort of thing?
As several others have stated, this is a real can of worms. Too many
worms to corral for only a few hundred piece parts.
That said, don't be bamboozled by UL into thinking that UL is the only
Nationally Recognized Testing Laboratory (NRTL). There are other
certified labs; see:
Keep in mind that when most people see a UL sticker on the cord they
think the whole unit is approved rather than only the cord to which it is
attached. Perhaps you too can get away with buying a bunch of UL
Buffalo, NY - USA
(Remove "SPAM" from email address to reply)
I don't post here much, but read a lot. What Edwin P. has been saying
is dead on straight. Unless you plan on marketing the "assembly" for
mass production, pass on getting the special unit UL listed. I deal
with it a lot as well and I wouldn't even agree to consider listing
Just my 2 cents
The only practical way to get UL approval is to hire one of the
consultants who "knows his way around UL." Pay the price and he'll
deliver the approval. If you try to do it by the book yourself I bet
you'll still be looking for help a few years from now.
I've come to feel that UL is another one of the guild like obstacles in
the way of business. It does not provide assurance that the purchased
product is safe.
Tom Watson wrote:
One might find more information here :
Seems at a quick glance that unless there is a new process or material
involved, their testing is to compare a manufactured item to standards
already established for similar items along with the materials and other
listed manufactured items used in its construction. Researching it for safe
combinations and stability for its intended use. A rejection would mean
choosing other material/s or modified design or a simple warning label and
resubmitting. Also they reserve the right to do periodic paid for visits to
the manufacture to insure consistency to the original item listed. I feel
that this is more for items that require complicated production control like
special tolerances, x-rays etc. or special bonding procedures and the like.
Your item might only require an occasional sample of current production.
Perhaps the cost might not be as prohibitive as expressed here. You can
phone, write or email inquiries to them. At least that part seems to be
The originator of this product is looking to reduce his liability insurance
premiums. Have you noticed the cost of ladders. Additionally the warning and
approval labels on them ? D--n Lawyers !
I would be interested as to what you find and decide.
Contact your local Hydro authority - they may have the ability to inspect
(and approve) small run custom devices. They then put an approval sticker on
whatever it is... cost could be $5-10 per sticker...
Sort of like having the electrical inspector approve your home wiring...
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