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Reply to "Burned "run" on MTH RealTrax Switch"

Is that a size match to the red wire? (Or larger is ok too)

22g seems light and may get hot. (I associate 22gwith about 5a continual draw, 7a surge max, but the shortness might really increase that max?? [ I'm not prepared for that "short wire" math, lol]  I'd run a second wire if it is smaller than the red wire otherwise you have the same basic issue.

 Just because your transformer puts out 10a doesntd meant you want 10a fuses. If the wire (or track) only handles 8amp cont., you fuse at 8amp. Fuses/breakers should guard weak points. A line should be fused right? (Right). Adding lighter wire to that line(now a bus)  fo an accessory? Ideally a new fuse should be added at that draw point(block)(right) This switch is passing 100% of the used track power unless your blocks and feeds are set up with alternate power paths around the  switch (drops/jumps/feed/lock ons) Your block set up if butting to the turnouts may complicate things there. " Blocks can be set up in many ways.

  This turnout's board(s) is(are) your layout's weakest link(s) as is IMO. And as is, the feed to the track must be fused below this/these traces(wire) maximums to protect the traces from 10a. I'd bet 6-8a is the max on the trace; if that. Your wire? 5a imo. 

OR make sure there are drops/feeds to each track piece that attaches to all three legs of the turnouts. Even a jumper wire ( vs a bus feed) between these 3 tracks will keep a heavy draw off those boards.

So, adding breakers just to guard those tràces and allow 10a to the track isnt really feasible outside of fusing the switch's blocks lower than other blocks; kinda silly to bother trying to feed in 10a over there if 6-8a is enough over here.

Lower your main fuse/breaker rating and or add the 3way bypasses imo. (I like to tune in circuits with fuses, then choose a breaker based on that )

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