Nori Komuro is a notable designer in the SET amplifier field. He is a degreed electrical engineer but owns and operates an electrical contracting business in NYC. Being an amp designer, I am sure he understands house electrical wiring as it pertains to an audio system better than your average electrician. Don't know the man personally, only by reputation and thought to pass the info along.
http://www.6moons.com/industryfeatures/komuro/komuro.html
http://www.6moons.com/industryfeatures/komuro/komuro.html