PD or Iota for my upgrade?
I'm thinking about a converter and battery upgrade. The batteries will be wet cell lead acid 6 volt Possible T-105s or the 230AH, EGC2 from Sam's club. I'll probably go for four. (Does nayone have...
Forum Discussion
Salvo wrote:
Forget about Iota unless you got 5 to 10 mohm cable resistance.
For reference, here are AWG wire gauge sizes and the resistances in milliohms per foot.
0000 (4/0) 0.04901
000 (3/0) 0.06180
00 (2/0) 0.07793
0 (1/0) 0.09827
1 0.4066
2 0.5127
3 0.6465
4 0.8152
5 1.028
6 1.296
7 1.634
8 2.061
#8 AWG will only let you get about 2.5 feet away for 10 milliohms (counting both pos and neg cables) and you still have to add in connector resistances.
I'm using 1/0 AWG welding cable ($2/foot) at less than 6 feet total (3 feet from the battery) for less than 1 milliohm total due to the cable. The Trimetric 50mv/500A shunt is only a tenth of another milliohm and the various connectors add a few more milliohms.
I've found that for reasonable distances and 1/0 cable, it's often the connector resistances that seem to dominate.
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tagsdon't seem to work on this site - is there a monospace tag anyone knows about that works here to make a simple ASCII table?)
