Devin,This is the truth, Service extention cords eat up current too. I have a space heater that draws 13.2 amps plugged into the wall. When I used a 30' service cord with that same heater, it drew 14.9 amps and the cord was heating up... My 4 cents [inflation]Nick-
Richard,If the cord is stealing resistence, How would that decrease drawl at the panel???Nick-
The best I found was at home depot. They call it speaker installation wire. grey jacket with 2 inside separate insulated wire. 1 blk 1 red easy coded. 14 0r 16 ga. I used 10 ga single wire to feed from source then tapped the 14ga to run to light or application. grounding one side to bus I ran 3 10 ga or 30 amp circuits that provide plenty of power. You probally won't have over 90 amps ligts or 12v stuff.You can also use brake or trailer wire 2 individual wires in grey jacket. A little larger. The stranded 14ga works good in either.
The NEC requires that AC and DC be in seperate 'raceways'. The DC wiring really doesn't need conduit but the flex wrap makes the bundels neater. I used ENT flex conduit to contain the THNN wires for the AC circuits. I also used THNN for the DC but in split flex tubing from an auto parts store.RegardsJerry 4107 1120