These are taken from the Amateur Radio Relay Handbook, 1985.

	AWG  dia    circ  open   cable  ft/lb   ohms/
	     mils   mils  air A  Amp    bare    1000'

	10   101.9 10380    55    33    31.82   1.018
	12    80.8  6530    41    23    50.59   1.619
	14    64.1  4107    32    17    80.44   2.575

	We don't show specs for 8ga or larger because they're
	usually stranded.

	Mils are .001".  "open air A" is a continuous rating for
	a single conductor with insulation in open air.  "cable amp"
	is for in multiple conductor cables.  Disregard the amperage
	ratings for household use.

	To calculate voltage drop, plug in the values:
		
		V = DIR/1000'
	
	Where I is the amperage, R is from the ohms/1000' column
	above, and D is the total distance the current travels (don't
	forget to add the length of the neutral and hot together - ie:
	usually double cable length).  Design rules in the CEC call
	for a maximum voltage drop of 6% (7V on 120V circuit)