How do I wire two separate 3-way circuits from the same power source?

Question

I have a switch box that has two 3 ways to control two different sets of lights 1 set in the hallway and 1 set in the living room and both of these sets have their own 3 way switch located in different locations but connected by 14/3 wire the power and both sets of lights are brought into the same box all with 14/2 wire.

The problem is I believe I have the wires crossed as when I turn the lights off at either of the different 3-way locations I have no control at the original switch box where the power and lighting wire is located.

How do I supply power to both 3-way circuits from the single power source?

Answer 1

Here's a typical three-way switch with power to the switch box:

You'll do just that. With the second circuit, the neutral (white) simply nuts with the others.

For the hots (black), add two pigtails to the source hot and run one to each switch, just as you normally would. Easy peasy.