From these guys. The info on UL "approved" no such thing, be weary, it's either "listed or recognized...how many audiophile cable makers say UL Approved? Or anywhere else, BEWARE, any one that claims it's just like UL listed, it ain't unless it is, what a concept!!!! http://www.middleatlantic.com/pdf/PowerWhitePaper4_07.pdf 
From these guys. The info on UL "approved" no such thing, be weary, it's either "listed or recognized...how many audiophile cable makers say UL Approved? Or anywhere else, BEWARE, any one that claims it's just like UL listed, it ain't unless it is, what a concept!!!! http://www.middleatlantic.com/pdf/PowerWhitePaper4_07.pdf