Things You'll Need
Instructions
Connect wires to the underside of a section of track and attached ̶0;ballast roadbed.̶1; One connection goes to the center rail, the other to an outer rail. Some sections come with wires already attached.
Run the wires to a transformer, such as the Lionel CW-80, though you can use non-Lionel railroad transformers. Higher wattage transformers can more easily power larger layouts.
Insulate ̶0;blocks̶1; of track to allow you to run two trains at once. Each block on a mainline should be long enough to hold one train of the length you plan to run. Insulate the rails by leaving a gap between sections, or using insulated connector pins.
Wire each block to a Double Pole, Double Throw toggle switch. Each pole goes to a separate controller on the transformer, while the center connectors are wired to the track.
Insulate one rail in sidings to store a locomotive while another is on the mainline. Wire the connections for the rail on either side of the insulated gap to a Single Pole, Single Throw toggle switch that allows you to cut off power when you choose.