Insulating pins-Where do I place them?

[Anonymous]

Can someone please explain to me where to place the insulation pins on two switches that are going to connect or will be at each end of an inner loop.

I want to be able to run a train onto this inner loop, kill the power on the loop track, and then run another train on the main track. (Sorry if my terminology is not correct. I am fairly new at this).

Jim K.

[wrmcclellan]

Jim K.

Welcome to the CTT Forum!

You will need to place the insulating pins on the center rail at the point(s) where you wi***he power to the inner loop to be isolated from the main loop. This also means you will need another connection to the center rail for the inner loop and a switch of some sort to allow you to disconnect the power. You do not need to isolate (insulate) the outer rails, just the center rail. Depending on the current requirements of any trains you run (lots of lighted cars draw more power), the switch you purchase needs to be rated for at least 5 amperes and possibly 10 amperes (better). Radio Shack sells the switches you need (simple ON/OFF or SPDT as mentioned below).

If you wi***o select power for the inner loop from a second transformer or from a second set of terminals from the same transformer in addition to powering it with the "main" line transformer, then you will need a single pole double throw (SPDT) switch. Connect the A or B terminal(s) of each transformer to each of the outside terminals on the SPDT switch and connect the center terminal to the center rail on the inner loop.

If you are using two separate transformers, you will need to phase them together to avoid serious sparking as the trains cross the insulating pin from one loop to the other when both loops are powered by the separate transformers. This means reversing the plug on one of the transformers into the wall outlet (to avoid the sparking). Let us know if this is the case and we can provide additional notes for you on how to phase the transformers if needed.

If you are running modern era trains with electronic e-units and/or TMCC/DCS, the transformer phasing must be done before you run any trains across the insulated section to avoid possible destruction of the electronics.

Regards,
Roy