Originally posted by unnerv:
here is a chart of recomended wire gauge for current draw. Your current draw can be checked by dividing you total system watts by 12 volts (ie 360 watts total power would be 30 amps of current.) Make sure to add up the power of all amps connected thru the power cable and then cross reference the chart. Hope this helps.
Right chart, wrong calculation.
P = I^2 * R
360w into 4 ohms is 9.5A.
Or, 400Wx2 into 4ohms (assumption) = 14A.
Then consult chart for length of run.
