Greg. We are using Nbr 12 sold wire ( Romax 12-2WG ) on our 7 buss blocks do to the distance of each. As long as we keep the block runs under 100’ that good for 20 amps. Ya …14-2WG is still good for 15 amps that most power supply are no much over 10 amps.
Well. today i got the USA Nbr 6 Switch installed. No more “S” track on long trains going out of Bakers Acres Yard.

But I did come across a problem that I forgot about do to we are track powered.
When coming into Backers Acres yard, we have a Aristo 10-R Track Switch that can be set Auto or manual for routing. But, at the other end we now installed a USA long Switch that has to have the points set for the fog. That so as not to be a short Cir. We use to have just another Aristo 10-R Switch with no problem coming out on the back side with spring load points and plastic or metal frog insulated. Now we have a little further to walk with our trains going around a storage shed to make sure its aligned.
This is what this area look like for now. The yard is behind this photo.
Showing on left side is Turntable and Eng. storage tracks, run around tracks, center tracks are the caboose tracks and right side is from yard to main line.

We can get 7 Eng. on the Turntable/Eng. Storage tracks and about plus or minus of 40 some rolling stock in the yard.
We still have to ring out the Yard area yet with our old ph. Mag. hand crank.
We still have a lot of Aristo and USA tracks that has the old screw joiner on them. Kind of fun finding bad joints that either show open or bad joint that for a few min. will smoke and then gets hard to crank the Mag. Easy way to find bad joint that train can runs slow in an area or block. If you do this like we do every year or so, make sure not to have any Sig. or track Switches involved in the line test. Ours puts out 20 A. @1 volt. or can switch to to 90 v. @ 500MA that don’t much on that setting that only show open or short cir.
We keep working on our layout, we may get more than just a track cleaning train running yet this year. LoL (http://largescalecentral.com/externals/tinymce/plugins/emoticons/img/smiley-cool.gif)