Dedicated 20 amp circuit - Electrician laughed!

I have read about the 220-240V opinion previously.  Otherwise, the article is mostly about wire gauge vs. length.  Front end equipment is not going to draw near enough to matter so I suspect the concern is primarily related to big amps (like I have).  My dedicated lines are only about 25 feet from the main 200A panel so I am fully comfortable using 10awg wire for 20A circuits.  Note, he indicated a junction box is necessary to change the larger wire that covers most of the run to a 10awg size that can feed the outlet.  Not sure about silver paste on an electrical connection as long as the connection is mostly gas tight with copper on copper or copper on brass/bronze etc.  I have used the Quicksilver stuff from Xreme AV LLC on power cords I have made but quit using it because I noticed no difference.   I also noticed he carries the wire gauge recommendation on to speaker cables.....made me wonder whatever happened to the guy recommending 0 gauge car battery cables.

 Hi Mitch

I suspect that 10 AWG is very adequate for your distance.  My panel is much farther to my outlet (50+) and since I was going to start from scratch I figured why not do it by the book.  I probably would not change a thing if I had a 10 AWG installed.  Having said that, I was frankly surprised by the improvement going from a clean 14 AWG (house is only 3 years old) to an 8. I didn't expect the highs to be improved so much.  I was under the impression that my bass was going to get all the benefits, but I was wrong.
For people starting from scratch, listen to Mr. Galbo's recommendation:

• 1 to 40 feet: 10 gauge wire
• 40 to 60 feet: 8 gauge wire
• Over 60 feet: 6 gauge wire
  

Unless you are clipping bass your power supply is more stable with some resistance not less. However, neutral to ground differential can induce noise in unexpected places as chassis and signal ground vary with load.

The best mechanics in the world are not necessarily the best drivers for Formula 1 or alike. Just saying.

I think that some of you guys buying into some of the crazy ideas here need to get a copy of the residential NEC. First: NEC does NOT allow separate earth grounds in any circuit that is connected to your primary service (the service that comes to your home, over head or underground, from your power co. to your main service box). Every ground in every circuit must be connected to the ground buss that is connected to the earth ground rod. Second: NEC requires 12AWG wire for a 20A circuit. It does not require 10AWG unless the run is over 50’ and 8AWG wire will not even properly fit in a 15 or 20 A receptacle. If your amp or any other device requires a 20A service, it is required to have a cord that is designed to plug into a 20A receptacle. If your amp has a 20A dedicated cord, or is required to have a 20A cord, it will only plug into a twenty amp receptacle which is required to be on a 20A circuit. If your amp or any other device comes with the standard 15A cord, then it is UL approved to and required by law to work properly on a standard 120V, 15A circuit
Not trying to be snide, but even audiophiles have rules....Jim