So a 16awg bus for a DCC++ with Deek motor shield or a NCE Power cab (both at 2A max) should be plenty then............
It is also about voltage drop over distance so will also depend on layout size and the length of the wire runs. Most of those charts allow for a fairly large voltage drop which most household and shop appliances/tools can handle. You might want to have a smaller percentage voltage drop. For instance in solar installs it's good to try and keep them under 2%, ending up using wire that would work with a lot higher amps than the solar panels are putting out. Sumner
A 12 foot bus (24 feet out and back, or enough to go around the perimeter of a 4x8 foot layout) of 20 ga copper wire only drops a half volt at 2 amps. That's only a 3.5% drop (at 14V), which is entirely acceptable. If you wired your bus as a loop around the perimeter, and connected both ends back to the booster, the voltage drop and percentage would be half that.
