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- From: berger@atropa (Mike Berger)
- Newsgroups: comp.misc,comp.sys.ibm.hardware
- Subject: Re: Are Gateway systems UL listed?
- Message-ID: <Brr073.46q@news.cso.uiuc.edu>
- Date: 21 Jul 92 16:52:13 GMT
- References: <1992Jul19.042703.11299@mnemosyne.cs.du.edu> <1992Jul19.231402.12863@leland.Stanford.EDU> <1992Jul20.033322.25040@philabs.philips.com> <1992Jul20.121122.9833@kei.is.s.u-tokyo.ac.jp> <1992Jul21.035519.28712@mnemosyne.cs.du.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: University of Illinois at Urbana
- Lines: 38
-
- mrosen@nyx.cs.du.edu (Michael Rosen) writes:
-
- >jeff@is.s.u-tokyo.ac.jp (Jeff McAffer) writes:
-
- >>I am not sure about concrete but I'll tell you what I know. UL is
- >>sort of clearing house for standards listings. Note, listings, not
- >>testings. They will list your product as having conformed to *some*
- >>standard somewhere. This is supposed to mean that it is safer or more
- >>reliable. In effect however, it really doesn't seem to mean much
- >>since you don't know what standards were used.
-
- >According to the article I read, you are incorrect. UL (Underwriters
- >Laboratories) does to its own testing of systems submitted for
- >approval. Check out the August 1991 issue of PC Magazine. Here's the
- >listing process as described in an insert:
- *----
- I have a friend that used to do testing for UL. He dropped electrical
- and electronic equipment off tables, ran them at higher-than-expected
- voltages, and subjected them to very high voltages to test electrical
- breakdown, among other things. Many of the tests were ultimately
- destructive. The UL standards are well defined.
-
- You have to be careful when you buy equipment, however, because the
- UL listing on the power cord applies just to the power cord, not to
- the whole item. Be sure the entire device is UL listed if that's
- important.
-
- This is one of the main reasons cheap external power adapters are so
- widely used these days instead of internal power supplies in such
- things as modems. They don't need separate UL approval.
-
- The Canadian Standards Association (CSA) is the Canadian counterpart
- of UL.
- --
- Mike Berger
- Department of Statistics, University of Illinois
- AT&TNET 217-244-6067
- Internet berger@atropa.stat.uiuc.edu
-