See Shows You How Booklet Wiring the Layout No 21 for a comprehensive colour coded diagram. There are certain products that, either due to the weight or the size, cannot be combined with others.
Peco PL21 4-Pole Double Throw Toggle Switch
Peco ST-11 Double Straight, 174mm / 6.7,8in long N Gauge
PECO ST-3011 Double Straight 174mm long 8-pack Code 80 Setrack N Gauge Track
PECO ST-11 Double Straight 174mm Single Length Setrack N Gauge Track
PECO ST-201 Double Straight 335mm Single Length Setrack OO/HO Track
PECO ST-2001 Double Straight 335mm 8-Pack ST-201 Setrack OO/HO Track
