Auto non-derailing wiring question

Better switching if powered by a constant voltage connected to the terminal on the switches. If I remember those switches the correct terminal is the one toward the center of the two with the metal jumper. Use insulating pins in the center rails at each switch. Make sure that insulating pins are in the control rails on each switch. Should work fine. 

The center rail is not part of the anti-derail circuit.  Presence or absence of the hot track supply will not affect the anti-derail feature. The required electrical circuit is a constant hot power source for the switch, and a return connection, via the wheels and axles, of a car passing over the anti-derail section of rail. 

Usually the small sections of track at the frog area are used for non-derail input.  Note the styrene used for isolation.  Ross switches pictured with DZ 1000 switch motors.  Both Ross and DZ, post on their websites non-derail wiring diagrams.  I'm not familiar with K-line switches.

Dave Ripp. posted:

I'm going to be connecting my 3 - O72 K-Line Super Snap loops with 8- K-Line Super Snap O72 switches. The loops are separately powered with Z1000's. The switches will butt up directly to each other for in out of loops, this works perfect with my track spacing no room for track in-between.  If I block power on the center rail will they still be non derailing. I run conventional only. Also does it matter if they are track powered or should I wire them separately ? 

The Z-1000's provide the ACC terminal at 14v for powering the switches

The "control rails" for the non-derailing feature are the two small rails at the V of the divergence.

As has been already stated, they are not affected by the isolation of the center rails.

Thanks for the responses. They were a tremendous help and a load off my mind.

Ok Dave,

While that is sinking in, consider this - Loop A is running at 9 volts and you want that train to cross to loop B - the engine has twin roller pick-ups and is pulling a passenger train with cars that have twin pick-ups.

What happens when the throttle for loop B is lower or higher than loop A when the engine or cars are on both center rails simultaneously on both switches of the cross-over?

"What happens when the throttle for loop B is lower or higher than loop A...?"

Sparks.  

Generally, the transformers are robust enough to withstand a momentary short from one output to another. A prudent operator will set the handles to similar voltages before making the movement from one power block to the next.  No need to give your passengers whiplash, with this being such a litigious society.