Below is a list of PDF files of the NEC electrical code. I will be adding more of them as time goes on. If there is one you don’t see please send me email what you’re looking for and I’ll get right on it.
Below PDF files will open a new window.
Electrical Alterations and Additions
SINGLE FAMILY DWELLINGS ADDITIONS 
Thank to Dominick videos of wiring I was able to put in a 3way switch in my kitchen due to where the original switch was located. I also was able to save thousands of dollars by rewiring my house myself that my wife and I bought.
You will have to trace them back.
When installing a three way switch, your video shows two black wires. One is supposed to be “hot” and the other a traveler. How doI i tell one from the other?
The green one is your ground.
I have four wires for a dryer. white, green, black, and red. and the outlet only has three hookups. the old one kept blowing breaker cause it was wired wrong. I need to know which one is the ground.