(Preface: I have read all of the related, earlier questions I can find... still stumped.)
I added an outlet to a run by cutting (before Outlet A) what I thought I had identified as the line in to Outlet A, and adding a Romex pigtail to the new outlet (Outlet N).
With breaker back ON:
- Outlet A is powered and fine.
- Outlet N is NOT powered.
- Outlets B and C (down run from Outlet A) are NOT powered.
What did I do wrong? Did I add the pigtail to the wrong wire? If the answer is YES, wrong wire, I did my best to ID the line coming into Outlet A; what is the trick I missed?
Additional info: House built in 2003; breakers are identified in box, but IMO oddly organized (example: "kitchen outlets" turns out to include random outlets in living room);