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Old 10-17-2011, 09:50 PM   #1
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Need help mapping new light circuit


Hi folks,

I'm in the process of finishing the basement and I'm running a new circuit for lighting between 2 rooms. I'm planning to run 14/2 from the panel. Each room will have only 1 switch with multiple lights. Power will be run first to the light in room 1. From there I'd like to run to a) the remaining lights in the room with the switch at the end of this run and b) to room 2 with the same configuration. My question is do I have to run 14/3 at any point on this run? How do I break off the same circuit for the second room?

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Old 10-17-2011, 10:29 PM   #2
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Need help mapping new light circuit


I would suggest studying the section in the NEC regarding branch circuits, and picking up a book, such as Black & Decker's Complete home wiring guide.

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Old 10-17-2011, 10:41 PM   #3
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Need help mapping new light circuit


Run a power cable to the 1st light in the 1st room.
Then from there run a power cable to the 1st light in the 2nd room.

Now you have power at the 1st lights in each room!

Next run a wire from the switch in the 1st room to the 1st light in the 1st room.

And run a wire from the switch in the 2nd room to the 1st light in the 2nd room.

Now you can turn on/off power to the 1st lights in each room with their respective switches!

Next in the 1st room, run a wire from the 1st light to the 2nd light. Then a wire from the 2nd light to the 3rd light, etc.

And in the 2nd room, run a wire from the 1st light to the 2nd light. Then a wire from the 2nd light to the 3rd light, etc.

Now you have wires run to connect all the lights in "parallel" in each room.

Hint: There is a LOT of room in light fixture electrical boxes to connect several wires together, but not much room in the electrical box where the switch goes.

Hint 2: Label each wire at both ends. Then you will know what all the wires go to after the drywall is up.
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Old 10-18-2011, 10:38 AM   #4
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Need help mapping new light circuit


If you’re on the 2011 code cycle, and you run power to the lights first, you’ll need to run 14/3 from the light to the switch box, to get the neutral to the switch box. Easy way to avoid that is to run power to the switch box first, using at least a 18 cu in box for the switch boxes. A 20 cu in works nice.

14/2 from the panel to switch box 1, 14/2 from switch box 1 to switch box 2. 14/2 from sw bx 1 to light, 14/2 from sw bx 2 to light. Daisy chain lights together.
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