I have an around the wall layout, so buss wires are black and white. Black to the back rail, white to the front rail.
I use these:
My main buss is parallel #16 wire. I have them twisted together to avoid crosstalk of the DCC signal. They go to these shorting bars. The feeders go from the shorting bars to the track. I have feeders attached to the track ~every 6'. My RailPro equiped locomotives have a voltage feedback to the handheld controller. Running a five engine consist, the voltage drop anywhere on the layout is a few tenths of a volt.
The shorting bars are available on ebay.
BigDaddyHow'd you know I used white and black?
I think most here are smart enough to figure out what to do if they don't have black and white wire So sure, feed them with a spoon.
I used a cable staple gun, the staples look like little croquet hoops, but there are also plastic cable clamps.
I do too, and after wiring my basement outlets to get it ready to be finished, I have lots of left over wire clips to fasten it down.
bearman14 gage bus, 18 gage feeders for me,
That's what I do too; you can get common 15 gauge house wire which is fairly economical and use it for a bus.
The bigger the layout and longer the run, the heavier gauge wire may be needed. While 16 may be adequate for smaller layouts, some go with 14 or even 12.
Rio Grande. The Action Road - Focus 1977-1983