Since the original poster told us his cable was 12ga, there was never an argument about longer distances and lesser gauges.
However, with the distances he had specified, he would not get any signal loss even while using 16ga cable which was my point.
Obviously 22ga at 40 feet is a bit silly but so is using 10 or 8ga wire.
JohnK had posted on this not long ago. He linked to a
webpage with the table of recommendations (based on science) enclosed. It is very useful for obtaining a general idea of max lengths per gauge and he does discuss lengths beyond 50 feet.
