How To Run Two Lighting Loops On One Circuit? - Electrical - DIY Chatroom Home Improvement Forum

 DIY Chatroom Home Improvement Forum How to run two lighting loops on one circuit?
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12-16-2010, 05:16 PM   #1
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## How to run two lighting loops on one circuit?

I have a semi-complex (to me) scenario I need help with.

I want to run a 4 way light loop for recessed lights and a 3 way light loop for my pendant lights on the same ciruit.

recessed -S1=S2=S3-L-L-L-L-L-L-L
pendant S4=S5-L-L-L

For this example let's say:
S = Switch
L = Light
- is 12/2
= is 12/3

I am running the power to S1 then as I wrote above. I want to start the pendant line from S2. I know that S1, S3 and S5 need to be 3way switches and S2 needs to be a 4way switch.

My question is how do I wire into S2 the start of the other line? Does S4 need to be a 4 way or a 3 way switch and which wires need to be spliced together?

Does this make sense? Thank you!

12-16-2010, 05:29 PM   #2
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Hope this helps

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12-16-2010, 05:36 PM   #3
Chewy - Lic. Electrician

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Quote:
 Originally Posted by outgolfin0 recessed -S1=S2=S3-L-L-L-L-L-L-L
So in the recessed lights setup, these S1,S2,S3 switches only control the following 7 lights correct?

Quote:
 Originally Posted by outgolfin0 pendant S4=S5-L-L-L
In this setup the S4 and S5 are only controlling the following 3 lights?

Now you want the ALL the pendant lights to be fed off of S2? and if so do you want S1,S2,S3 to remain controlling the 7 recessed lights? if that is the case what do you want to come of S4 and S5?

please explain what your goal is. like what switches you want controlling what lights include what you want every switch to do. cause right now its hard for me to understand what your trying to say.

 12-16-2010, 06:51 PM #4 Electrician     Join Date: Aug 2008 Location: Near Jackson Michigan Area Posts: 1,452 Rewards Points: 504 I believe I understand what the OP is trying to do. You won't be able to take power from S2 to S4...no constant 'hot'. Take a 12/2 from S1 to S4 if you can. If you want S2 to S4, you'll have to bring a 12/2 from S1 to S2, and then to S4, in addition to the 12/3 from S1 to S2. S4 needs to be a 3-way switch. Decide which way you want to do it, and we can help you out with the actual connections. Watch you box fill. __________________ Kyle Just because you can, doesn't always mean you should Last edited by SD515; 12-16-2010 at 06:55 PM.
12-16-2010, 09:32 PM   #5
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Quote:
 Originally Posted by SGC622 So in the recessed lights setup, these S1,S2,S3 switches only control the following 7 lights correct? In this setup the S4 and S5 are only controlling the following 3 lights? Now you want the ALL the pendant lights to be fed off of S2? and if so do you want S1,S2,S3 to remain controlling the 7 recessed lights? if that is the case what do you want to come of S4 and S5? please explain what your goal is. like what switches you want controlling what lights include what you want every switch to do. cause right now its hard for me to understand what your trying to say.
The idea is to run two separate lines. there will be a recessed lighting line with 3 switches and 7 lights and a pendant line with 2 switches and 3 lights.
The switches and lights are different. The switches from the recessed line do not control in any way the lights on the pendant line and vica versa. I want the two lines to be run off the same circuit though.

I forgot to mention that S1 is in its own switchbox, S2 and S4 are together, and S3 and S5 are together.

I want to take the power for the pendant line from the other line at the switchbox of S2. Is this possible or do I have to run a 12/2 from the box of S1 to the box of S2/S4?

12-16-2010, 09:53 PM   #6
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Quote:
 Originally Posted by SD515 I believe I understand what the OP is trying to do. You won't be able to take power from S2 to S4...no constant 'hot'. Take a 12/2 from S1 to S4 if you can. If you want S2 to S4, you'll have to bring a 12/2 from S1 to S2, and then to S4, in addition to the 12/3 from S1 to S2. S4 needs to be a 3-way switch. Decide which way you want to do it, and we can help you out with the actual connections. Watch you box fill.

You are correct, I would like to take power from S2 for S4.

So if I understand this correctly, if you took power from S2, you would be controlling the power to S4 as well with S1-3 because you would be drawing power from the travelers. That's why you need to run a dedicated 12/2 from S1 so that you are getting constant power.

I am going to go ahead with just splicing in a 12/2 at S1 and running that over to S4. Thanks for the help.

 12-17-2010, 01:04 AM #7 Chewy - Lic. Electrician   Join Date: Dec 2010 Location: Whitman, MA Posts: 109 Rewards Points: 75 I think i get what your saying now and given what you said, you would have to take out the feed to S1 and run a wire from S4 to feed S1. to get both sets of switches to be fed by the pendant light circuit.
12-18-2010, 06:41 AM   #8
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Quote:
 Originally Posted by outgolfin0 You are correct, I would like to take power from S2 for S4. So if I understand this correctly, if you took power from S2, you would be controlling the power to S4 as well with S1-3 because you would be drawing power from the travelers. That's why you need to run a dedicated 12/2 from S1 so that you are getting constant power.
Correct

Quote:
 Originally Posted by outgolfin0 I am going to go ahead with just splicing in a 12/2 at S1 and running that over to S4. Thanks for the help.
That will work. Again, make sure your within the box fill calculations.

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 Tags 3 way switch , 4 way switch , mutliple loops

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