Wire Gauge Required Question
For some reason I just can't understand the various wire gauge tables, and I have tried to, so I am hoping somebody will take pity and do all the work! :) One table that I can follow says that for...
Forum Discussion
You have to always ask, "Percentage of what?" Playing with tenbear's voltage drop calculator, leaving the same wire, distance, and amps, you get the same voltage drop in volts for any voltage chosen. (same length of wire, same R, same amps)
But the percentage changes when you change the voltage, so the higher the voltage entered, the lower the percentage that same drop is.
http://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=2.061&voltage=12&phase=dc&noofconductor=1&distance=30&distanceunit=feet&eres=8&x=63&y=12
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I just got my new 230w panel. On the back it says to use 12 AWG copper wire ("only use copper" it says.) However it does not say how long that wire can be and still be 12.
The two pigtails from the junction box (diode in that) are 39" each of 4mm2 and marked 12AWG/90C/600v/wet-dry with MC4s
I expect to go from those pigtails to whatever fatter gauge I choose.
No controller yet, so have to wait for the fun to begin!
But the percentage changes when you change the voltage, so the higher the voltage entered, the lower the percentage that same drop is.
http://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=2.061&voltage=12&phase=dc&noofconductor=1&distance=30&distanceunit=feet&eres=8&x=63&y=12
-------------
I just got my new 230w panel. On the back it says to use 12 AWG copper wire ("only use copper" it says.) However it does not say how long that wire can be and still be 12.
The two pigtails from the junction box (diode in that) are 39" each of 4mm2 and marked 12AWG/90C/600v/wet-dry with MC4s
I expect to go from those pigtails to whatever fatter gauge I choose.
No controller yet, so have to wait for the fun to begin!
