We have alot of different types here, and some are from various places in the far east where they use zip cord extensively. I rip lots of that out. Also I get to demo lots of Japanese "romex" cable. It has Kanji writing on the sheath. Some of these guys like to install outlets without bothering to use a box, they just cut a hole in the drywall and use screw anchors to fix the ears of the receptacle to the drywall then screw on a plate. Homeowners could not even begin to compete with some of the stuff foreign "electricians" do around my town. But please don't take me wrong, I'm not zenophobic. It's part of the alure of living here, all types from all over.