Power losses in long wires with multiple loads
The choice Topology of series and/or parallel power feed determines what is best for bus load, and cable drop.

If your load is constant power or constant voltage or constant current, each must consider the accumulation of \$ I^2R=Pd \$ for cable losses.   

Clearly the distribution R of the bus must be a low % of the load R for goid load regulation and efficiency, which you can calculate easily in a spreadsheet using Ohm's Law by R ratios or adding power losses or voltage drop. 

Just like AC lines are designed for 5% distribution loss max with tap changers and prudent network design on power demand, you need to define a spec for bus regulation then choose a topology that suits your needs.

In the old days of distributed DC power both bulk power and DC reference voltages were fed to each line card for local regulation with the requirement that no designated feed current could be exceeded for the bus wire used.