Forgive me for getting up on my soap box, but in a previous life the company I worked for had to deal with UL and as part of my job I sometimes had to deal with them. UL does very little if any testing themselves. We did all the testing ourselves to there spec. filled out the paperwork and sent it to them, that was it. Once every few years they would send someone in to do an audit to make sure all was documented properly and once in a while they would even witness a test. The problem with UL is they have so many different specs. that you can get approval for nearly anything provided you go for the rite spec. A 5 ft extension cord can have a UL rating, the spec being no more than 10 amps at 120 volts indoors uncovered in a dry area. Pretty simple to make one that fits that bill but It will get a UL sticker. Unless you know what standard the device is approved for the UL tag may not mean what you think. I really don't think to much of UL but that's mostly all we have in this country so I guess you can say it's better than nothing, maybe.
