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
tenbear wrote:BFL13 wrote:
Thanks tenbear. I used 30v at 30ft with #8 and 8amps to get a 1%drop and so 29.7v "at the end" (at the controller I guess)
So now the question is, "How many amps will that cost me (if any) at the battery, where we assume no losses controller-battery?"
I wish I could answer your question but I have no idea.:h
I'll get you some number tomorrow. assuming no conversion loss, calculate the watts loss at the input, swag say from your numbers that 0.3Vx8A = 2.4Watts. OK on the output assume 13V so I= 2.4W/13v or about 0.2A.
not much. But again, I'll run through some numbers to verify run resistance, Imp etc.
BTW I run up to 100' of wire for my portable panels @160W and have worst case about .5A loss due to power loss in the cable. cabling is all sections of 30A RV cord. Take the ground wire and run it in parallel with one of the other conductors, doesn't make any difference which one to cut down resistance. basically makes the cable as 1 10g wire and one 8 ga wire.
