One of the "home inspectors" here locally bought himself one of those "Inspector" three-prong electrical testers that measures voltage drop, and boy, has he been making waves! He's got a bunch of the realtors ready for a tar and featherin' party!
Around my area at least, none of the new home electricians seldom pulls anything larger than #12's to basic lighting/receptacle loads.
VD is a social problem, not an electrical one here.
We do service work on houses in the +2000 sq ft range that are all 14/2 NM except where the NEC historically required 12/2 NM (kitchen, dining rm, that sort of thing). 150 feet or more from the back of the upstairs bedroom to the loadcenter in the garage, all in 14 gauge NM cable, is not unusual. They use 14/3 to cut install costs to those long pulls, too. Share that #14 neutral!
Anyways, this home inspector has been noting on his reports that many of the homes he's inspected have an unacceptable voltage drop problem (20% in one case I looked at). And he's right, but how many of these people are going to pay (or can pay) to have nearly their entire house re-wired? They (the realtors) call me and ask for my opinion, and suggested options. I generally give two answers;
1) Re-wire to larger gauge wire, (pretty serious money) or,
2) Sell it with the deficiency noted.
Guess which one is ALWAYS chosen?
By the way, these houses are generally always signed off by the local housing inspectors. There normally is an "Approved" sticker fastened to the loadcenter door, where there are inspections.
Ok, my headache's back.... Doc, oh Doc!..