Current carrying capacity Copper thickness

You can make your own tab and bus wire. Copper foil is available in thicknesses from. 002 to. 021 from McMaster-Carr or another supplier. It can be cut into thin strips to your particular specifications. You can also use flat grounding braid for bus ribbon, as it is made for heavier current carrying capacity. Grounding braid comes in a variety of thicknesses and widths and is usually tinned. Make sure to use Tinnit to tin the tab and bus if you make your own - it also helps to minimize oxidation. You can use round wire, either solid or stranded, for bus connections as well as cell connects, if you desire, but the flat ribbon is probably easier to work with. Square mils... 

For uses in electronics, copper alone may be applied—in order to enhance the thickness of metal and its capacity to carry current. 

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