Low voltage...lower than 48V?? So my device that runs on 24VDC wouldnt have to be UL certified..based on the fact my external supply IS certified.


--- On Thu, 10/30/08, Bob Axtell <bob.axtell@gmail.com> wrote:

> From: Bob Axtell <bob.axtell@gmail.com>
> Subject: Re: [OT]: Under what circumstances is a UL certification required in the U.S. ?
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> Date: Thursday, October 30, 2008, 1:33 PM
> You got me, that time, Bill.
> 
> Yes, anything that can use a UL-certified wallwart
> qualifies, BUT... make sure
> that the cert# is authentic. Lots of fakes out there...
> 
> --Bob
> 
> On Wed, Oct 29, 2008 at 10:01 PM, William Chops Westfield
> <westfw@mac.com> wrote:
> > On Oct 29, 2008, at 7:53 PM, Bob Axtell wrote:
> >
> >> UL certs are absolutely mandatory unless there an
> overriding reason
> >> to exempt,
> >> such as certain test equipment, power companies
> and transmission
> >> systems, radar
> >> or radio installations, etc etc.
> >>
> >> Ever play Monopoly?
> >
> > Monopoly games have to be UL approved?
> >
> > I thought there were some common exceptions:
> > 1) battery operated equipment.
> > 2) electrical equipment with a low voltage external
> power supply (wall
> > wart), where the external supply IS ul certified...
> > 3) Board games with no electronic content.
> > 4) ??
> >
> > BillW
> >
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