Solar cable thru fridge vent
Planning out my solar system and I see most go thru the fridge vent. Are you drilling a hole from the side and running cable down shaft or using fittings? I read that you stay on opposite side of fl...
Forum Discussion
Almot wrote:
Something I don't understand with this V-drop calculators. The one in BFL link says "single set of conductors, one-way length". If we have 2 leads of the same length, all is good. And, in panel wires this is usually the case - same or close length of Pos and Neg from panel to controller.
But, lets consider Pos 30ft and Neg 1 ft - ex, you bolted Neg to the frame when doing some trailer wiring - not necessarily panels. Should we still use one-way length, and if so, which one - 30ft or 1 ft? :)
What matters, of course, is the total wire length the electrons need to go through. If the calculator is set up for one-way wire length, you need to enter 30 + 1 = 31 feet in this case. If it's set up for a pair of wires, you enter half that length, or 15.5 feet.
In practice, it's almost certainly okay in this particular example to ignore the one foot pigtail as immaterial when compared with the 30' lead. A 3% error isn't going to alter your decision on what size wire is appropriate, partly because you can't buy 6.23 gauge wire.
