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The most common scale for a model train is called ho with 014 inch on the model representing one foot in the real world wiring will need to be done after you have laid or set the track in place however you will require a power controller to drive the train and a track that has a terminal connector for the electrical wires. Basic wiring those who have ever wired a tinplate layout recall that they just plugged the track together and the trains ran that was possible because the trains were powered by alternating current ac ho scale trains run on direct current dc and that creates the possibility of shorting out the track by improper wiring the oval within an . Atlas all scale hobby diorama model building and model railroad electrical wiring model train track controls control switches selectors relays wire. My csx ns ho railroad part 16b installing tortoise switch machines track laying glue or pin duration 2812 chadwick model railway 98291 views 2812 how to make a concrete counter top . Block switch a single pole double throw spdt electrical switch thats used to connect one wire to either of two other wires while most hobbyists think of toggle switches like those shown in figs 1 and 2 slide and rotary switches can also have spdt contacts