Wiring Your Layout | Articlesel The BasicsConventional ControlAdding Command Control1. Understanding electricity and how it relates to your model railroad 2. Best Practices for model railroads – from the size of your wire to the power of your transformers 3. Soldering – learn a few tricks to mastering this essential modeling skill 4. Power Supplies – an introduction to our options 5. Phasing Transformers – an easy way to expand and simplify your wiring 6. Accessories vs. Track Power – Constant vs. Variable VoltageSee more on lionel How to Wire an Old Lionel Train Set | Our Pastimes How to Wire an Old Lionel Train Set By Rich Finzer ; Updated April 12, 2017. The track section is now firmly secured. Remove 1/2 inch of insulation from each end of the two strands of bell wire with the utility knife. Turn off or unplug the train transformer from the power outlet.