The chart below was taken from a booklet put out by 'SURE POWER INDUSTRIES"

Spread your page out wide and let's hope the columns line up...

                                                David(dsl82westy)
P.S.: anyone wishing an original of this pdf booklet, just ask via pm
and I will do my best to send it along.
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9.1

  The charts on these pages show wire sizes for both a 10% voltage
drop (most normal accessories) and a 3% voltage drop (sensitive
electronics).

WIRE GAUGE for 10% Voltage Drop 12 Volt Systems (AWG)

Wire to load in Feet            10      15      20      25      30
        35      40      45      50
Current (amps)
        5               14      14      14      14      14      14
        14      14      12
        10              14      14      14      12      12      12
        10      10      10
        15              14      14      12      10      10      10
        8       8       8
        20              12      12      10      10      8       8
        8       6       6
        25              10      10      10      8       8       8
        6       6       6

WIRE GAUGE For 3% Voltage Drop 12 Volt Systems (AWG)

Wire to load in Feet            10      15      20      25      30
        35      40      45      50
Current (amps)
        5               14      12      12      10      10      8
        8       8       8
        10              12      10      8       8       6       6
        6       4       4
        15              10      8       6       6       4       4
        4       4       2
        20              8       6       6       4       4       2
        2       2       2
        25              8       6       4       4       2       2
        2       1       1