seanandredj
As ravi pointed out - if you can find/get a really good deal on that 16 gage wire, then you just may want to buy it and just double up the runs! Twist together two runs of + and two runs of - and you would have wire that is roughly the equavalent of 12 gage. Or to put the size ratio another way.... The wire gauge is a logarithmic scale based on the cross sectional area of the wire. Each 3-gauge step in size corresponds to a doubling or halving of the cross sectional area. For example, going from 20 gauge to 17 gauge doubles the cross sectional area (which, by the way, halves the DC resistance).
If you are really bored with nothing else to do, here is some more reading about wire:
Wire info
Good Luck
Randyman
