Here you go...

https://ogrforum.com/d...612#2415514336949612 

Use U for "black" and A or B for "red"

Phasing is nearly essential with more than one transformer, particularly if they share a common ground. It puts the alternating current sine waves in "phase". Non-phased transformers oppose each other, creating all sorts of problems with voltage and heat.

Phasing a Lionel PWC ZW Controller and 2 PW transformers

Is just about everything you need to know on this issue.

Yes and yes.

The polarized plugs aren't really needed, but if you stick with your proposal(switching wires inside), that will make the phasing issue for your KW's at any time going forward pretty much foolproof.

The only problem that might come up is if they are out of phase with modern power supplies you might procure in the future... which actually do have polarized plugs that matter.  At that point, I would just grind down the wide plug tangs on the KW's so they are no longer "polarized" and can be turned around if needed.

A small tip that was offered here, one that has been great for me since I only have a Christmas layout, is to do this: get the transformers in phase and then paint the same side of each plug so that you can plug them in over and over and KNOW how to insert the plugs.

I don't know electrical theory but I do recall reading once that not all wall outlets are guaranteed to wired correctly.  Thus, it was suggested that, if possible, use a multi-outlet strip and plug your transformers into it.

Simple things but they were helpful to me.

- walt

"I am running everything off a power strip so the "phasing" of all the plugs should be the same."

is that true?  that is a darn simple solution.

It is true, once the initial phasing procedure is followed.  The power strip just keeps all transformers plugged in as you placed them during the phasing steps, and then ensures they are plugged into ONE outlet instead of different ones around the room.