How can you tell which wire is common on a 4 way switch?

Quote from the video:
Quote from Youtube video: This group of wires goes to the upstairs switch in this group that's connected to the switch still goes downstairs. As you can see that's the hot set of wires this is just a little voltage tester.

How do you wire a 4 way switch with multiple lights?





Quote from the video:
Quote from Youtube video: Then will be wired over to the actual four-way switch and then wired up to the last three-way switch. And then on to the lights. And you could have however many lights your circuit will handle.

How do you run a 4 way switch?

Quote from the video:
Quote from Youtube video: For this design we just extend the black wire from the two common terminals of the end switches. And then we run the gray and brown wires between the switches.

How do you wire a 4 lever switch?

Quote from the video:
Quote from Youtube video: But I'll go through the basics on the white board and just show you how a circuit is laid out here's a very simple diagram of how a four-way switch works. We our service panel.

How do you wire a Leviton 4-way switch?

Quote from the video:
Quote from Youtube video: Three wire run from each of the two three ways already. And they're just going into the box for the 4-way. And I'm just stripping off the outer coating. To cut in these wires.

How does a 4 pole switch work?





Quote from the video:
Quote from Youtube video: You will see that it is blocked by the other three-way. But if I was to switch to four-way. You will see that the travelers are now criss cross allowing power to be moved over to the other traveler.