In case this is not understood about UL listing (Can't speak to the others more than to say that common ones like CE are often a higher standard. In Europe they tend to be more sticklers and happier to accept regulation), there are real design minimums required to be UL certified. Things that must be incorporated in the design or the UL cert will not be awarded. I am familiar with design of electrical gear and UL testing, there are important basic dimensional requirements for how far apart conductors may be (to prevent arcing and promote arc quenching), how far along non-conductive surfaces the distance is between conductors (reduces the occurrence of current flowing along tracks of carbon or other smut), for example, based on the applied voltages.
These minimums are not arbitrary, they exist because of real and dangerous failures; but the amount of risk is something many people argue about. UL is not a super stringent cert. I would not want to uses un-certified equipment for charging a large EV. My small. lithium battery pack/BMS, cheap from China, came with no UL listing. The stickers had even been peeled away from the charger which was modified with some post manufacture kludges. I didn't like it, but never came up with an affordable alternative. My healthy respect for safety regulations and my desire to be a cheapskate are often at war. Just be sure you understand the heightened risk and choose accordingly. On Fri, Mar 18, 2016 at 7:44 PM, Lee Hart via EV <[email protected]> wrote: > brucedp5 via EV wrote: > >> it mentions the product is >> - Safety listed by ETL >> >> I know UL, but what is ETL? >> > > ETL is a competitor of UL. Same kinds of testing; just a different test > lab (and usually cheaper). Both UL and ETL are independent testing > companies. You pay them to test your product. They are more or less > interchangeable. > > UL and ETL are "brand names" for testing laboratories. Just as "Coke" and > "Pepsi" are simply brand names for carbonated soft drinks. > > Unfortunately, many people use brand names to refer to generic product. > That's the power of advertising. Similarly, UL advertises its brand name > much more aggressively than ETL. Regulations *shouldn't* be written to > require a certain brand name product; but sometimes they do. That's how you > get rules that say "must be UL listed" when they really mean "must be > safety tested and listed by a recognized independent testing agency". > > -- > Knowledge is better than belief. Belief is when someone else does > your thinking. -- anonymous > -- > Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 585-6737 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Mobile and Google Phone [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160319/67fe17c7/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
