Ah! Not bad, I should have thought of using some cable as a resistor.
If I use a thinner gauge cable, do you think it simply won't tolerate the amperage? 6awg seems excessive on each line if they're only running 50amps each, and I don't need such a long cable. Plus, it'll be a lot more expensive.
X-section of 6awg = 13.3mm^2
X-section of 8awg = 8.37mm^2
So, if you're figuring 10ft of 6awg, I guess 6ft of 8awg will work. I think 8awg is capable of tolerating 50amps, at least I don't expect such high constant load. Then, I could pick up the wire from hobbyking. And...were you thinking that I'd need the long wire on each wire side [Positive and Negative] (i.e, 20ft each PS), or just 10ft total per PS?
If it's just 10ft total per PS, 10ft of 6awg is 4mOhm (according to http://www.cirris.com/testing/resistance/wire.html
?) and good for .2v drop @50amps.
[I found the resistance calculator after I did the stupid cross section babble above, but they both check themselves.)
I wonder if it would be useless or not to loop that wire around something ferrite to make a bit of an inductor. That would...reduce the current surge? I A) don't have any practical inductor experience outside of physics 101, and B) have no idea if that would have a meaningful impact.
If it's 6ft of 8awg per power supply, and I use 3, it'll be something like $20+ shipping from HK. If I need to use 6awg and 10ft, then it'll be more like $70-80 of cabling (~2x the length, 2x of 8awgs ~=6awg.).
Thanks, Monsieur, for the feedback.
I'm thinking especially if I can get away with the 8awg cable, I'll pick up 4 of the power supplies. They're ~$15 on ebay, or I could just buy 10 of them for $78.
New to endless-sphere? Notice a lot of signatures recommending Ebikes.ca? That's because it's the best place for a quality and manageable, (but still 'real'), first build. Justin is a solid supporter of electric bike development, and a good source of equipment.