On 11/24/20 2:36 PM, John Robertson wrote:
On 2020/11/24 6:42 a.m., Peter W. wrote:
https://www.cui.com/blog/what-is-the...-ul-recognized


https://store.intellaliftparts.com/b...abbreviations/

Per the NEC and various codes, powered item permanently installed (in
the USA) is required to carry a UL/ETL listing.
Technically, any mains-attached (plug-in) item sold to the public (in
the USA) is also required to carry a UL/ETL listing. At whatever
operating voltage.
UL Listed items made up of sub-assemblies will typically carry UR
symbols on those sub-assemblies. Repairs made to such items must be
with UR components.

Where this gets cute: That junk from China is sold from, and
originates in China, is typically shipped via subsidized Chinese Post,
and directly to the consumer - thereby avoiding the letter of
regulations and codes. And then there are here-today-gone-tomorrow
resellers that get around the code by simply ignoring it. Making their
consumers potential victims.

https://www.galco.com/buy/Staco-Ener...xoCQPcQAvD_BwE
This device carries a CSA mark.


https://www.ebay.com/itm/20Amp-Varia...V/124023830503
This device does not.Â* Note the difference in cost. That costÂ* is not
only for those obscene profits on the part of the manufacturer, but
also for proper design, proper testing, basic quality control,
insurance and all the other unnecessary niceties avoided by the
resellers and their suppliers. So, the bottom line is that you get
what you pay for, with all the consequences attached thereto.

Peter Wieck
Melrose Park, PA


Thanks for taking the time to reply to such depth. I will be flagging
this so it is easily retrieved in the future!

John :-#)#


I appreciate this too. Further investigation on my part might shed
light on a cause for both of my dimmer failures: too high of input
voltage! Even though advertised as 12-24VDC input, I tend not to trust
this figure and, after looking at the components inside, I think it's
12V, period! Unfortunately, the driving supplies I had been using for
this were more like for standard Ham radio, 13.8 VDC. Perhaps this
higher voltage could not be handled by the dimmer components.