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I cleaned up a few 022 switches a while ago and they all tested out fine before placing on the layout. Then I placed them on the table and everything was working fine.  Then I had the audacity to screw the track down to the table.  Now I am getting a short on my lower level.  I am suspecting that it is one (or more) of the 022 switches causing the short once they were screwed down to the table. 

I remember a thin piece of cardboard coming out of one of the switches when I cleaned them up, but it worked fine without it so I removed it.  I can't remember exactly how the cardboard/insulation was placed inside the switch.  Do I just cover the center rail straps so it doesn't contact the base plate?  

I found this picture on tandem associates, it appears that there is a small piece of cardboard under both the center rail strap and outside rail strap.  Is this needed?  Is it common practice to need to place some thin cardboard in the 022 switch?  If so, where is the best place or most likely cause for a short?

 

 

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There are multiple points on the underside of the switch that are connected to the center(hot) rail.  The bottom plate is metal so if any of them come into contact with the plate there will be a short.  You come probably solve the problem with a couple of layers of electrical tape between the hot connection points on the center rail and the bottom plate.

I count two places plus the center piece of metal shaped like a '7' or dog leg.  As I recall on some switches there was a paper that covered the entire area between the switch and the bottom plate.

Thank you all for your help. I finally had a chance to dig into this issue.  I first loosened all screws in or near each of the four 022 switches. Still had a short. So I removed and tested each switch. They were all working properly. 🤔

Now I had the track broken into segments, which made it easy to locate the short. It turns out that there was 1 10in straight that was shorting out. I would have never suspected this piece to be bad. 

I swapped in a new straight, and carefully screwed all of the track back down, being sure to not “smash” down anything too overly tight. Issue fixed. Thanks again. 

JD2035RR posted:

Thank you all for your help. I finally had a chance to dig into this issue.  I first loosened all screws in or near each of the four 022 switches. Still had a short. So I removed and tested each switch. They were all working properly. 🤔

Now I had the track broken into segments, which made it easy to locate the short. It turns out that there was 1 10in straight that was shorting out. I would have never suspected this piece to be bad. 

I swapped in a new straight, and carefully screwed all of the track back down, being sure to not “smash” down anything too overly tight. Issue fixed. Thanks again. 

Good to hear that you solved the problem. The rail insulator material is pretty tough, but it does wear through.

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