I had a similar question to you. In my case I wanted to find the right gage wire to make up by lipo pack and to install remotely my Watt meter.. http://endless-sphere.com/forums/viewtopic.php?f=2&t=23474&start=0
knowing the max Amps my controller draws and the total cable length needed for the installation I use the info bellow to determine that I would need wire gage 10-12 to make my battery and watt meter harness. TAKEN FROM
http://www.epanorama.net/documents/wiri ... tance.html
FROM A CAR AUDIO PERSPECTIVE. IT DOES CERTAINLY APPLIES TO EBIKES
Car audio cable recommendations
This info in from rec.audio.car FAQ (orognally from IASCA handbook). To determine the correct wire size for your application, you should first determine the maximum current flow through the cable (looking at the amplifier's fuse is a relatively simple and conservative way to do this). Then determine the length of the cable that your will use, and consult the following chart:
[color=#000000]The problem is finding wire.. I found this on another forum
FROM (http://www.rcuniverse.com/forum/m_79521 ... tm#7952172
go to the home depot electrical department and ask to look at their s-o, s-j, s-j-o, or s-o-e-w, type copper wire. its multi-conductor so if you want 10awg you need to ask for 10/3 or 10/4. this means that if you buy 3 ft of 10/4 you actually get 12 ft of wire. it would be 3ft of black, 3ft of red, 3ft of white, and 3ft of green. it very closely mimics the wire we use in rc at a fraction of the cost. it has a very high strand count with very fine strands, and it solders very well.
any combonation of s-o is rated for 600 volts and has a very high strand count and a little thicker and softer insulation. anything starting with s-j will still do fine and much more closely resemble hobby wire than standard building, but will be a little stiffer than s-o types.
The "AWG" is a standard for the size of the wire itself. The insulation is the difference in what we are talking about. Solid, stranded wire has a slightly different Outside Diameter. Obviously Solid wire is not what you looking for. Home Depot, lowes, or major stores like this are going to carry mostly THHN wire. These four letters are used to explain the makeup of the insulation of that wire. Not what you are looking for. If you go to an electric supply store that specializes in selling all electrical supplies is your best bet. I dont know the insulation off the top of my head but ask for a wire for Panel makeup. The wires used in making up electrical panels is a high strand count with a very flexible insulation. THHN has an outer jacket of nylon the last N, in THHN. You should be able to pay cash at any supply house and they will hook you up. Much better prices than Home Depot. Ask them to take you in the back and you can check out the wire that they carry and find exactly what your looking for. I know that you have already found a wire that suited you needs. Just wanted to put in my two cents.
just tell them you want to see the 10awg rubber cord. they will cut it for you, to the length that you want, even 1 ft.
the rubber cord that you want should fall into the s-o, or the s-j category. you will be impressed with its construction and softness.
im an electrical contractor and we build machines that use this cable and rely on its ability to move freely to allow for proper automated movement of the equipment.