There is for one thing, nothing known as the U.S. electrical code. There is a thing called NEC 2002, which is the current code cycle, for the National Electrical Code. Get it read it, understand it. you will soon realize there is no such thing as "audio" grade AC wiring devices, , as being marketed by hucksters, and marketing BS machines. NEMA has no such category. Learn it read it, get educated. Power cord materials, have all been classified, for ampacity, enviormental uses, ie. water, oil, hard use, etc...nothing of it's AUDIO properties, since there are none. ampacity, voltage ratings of the insulation of the wire, etc. are all electrical properties that have a clear defined standard, and is part of teh mfg'd product specs. Audio qualtiys does not come into play. Ther eis more BS in audio than anything I've ever seen, the gulliable fill their heads, with such hyoped BS, they eventually loose all capacity for thought, reaasoning, and the use of logic. The 6ft power cord improves the sound, the previous 100 feet of NM cable in the wall back to the service panel, then out to the street transformer is imaterial? How is this possible, in anywhere other than BIZZARO world? AUDIO spelled backwards, is OIDUA, and you know what it means? Nothing, you thought it did? Why don't the power cord effect the toaster or steam iron, only audio products, how do them electrons know to do something differenly going to an audio product, don't they get confused? Is this a coffee maker, an iron, a vacuum cleaner, nooooo, it's an audio product, let's change physics. What a bunch of fools, in Audio Bizzaro world.