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# Two Separate Light Circuits - one power source

#1
11-07-05, 09:39 AM
kevha
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Two Separate Light Circuits - one power source - Help needed

Hi
I am remodelling my bathrroom
I have two powwer circuits - one for GFi so I have one remianing for lights

One Light circuit - one main dimmer an dtwo 5" recessed cans.
2nd Circuit - Vanity recessed lights with dimmer at vanity

How can I run both circuits form one power source?.

Current Set up so far .....
Power into one 5" can
Cables to Main swicth and second 5" can
I am ready to make a 'run' through to the vannity light circuit

Issue - The junction boxes that come on the top of the 3" vanity lights are small and would not allow multiple connections to fit. Is it possible to run a cables form 'somewhere' off the main lights circuit to the vanity dimmer and form there run single cable to 1st 3" can and then form that 3" can to the second " can? If so - how would this be wired?
Any ideas welcome
thanks

Last edited by kevha; 11-07-05 at 11:45 AM.
#2
11-07-05, 09:39 PM
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Join Date: Sep 2000
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I'm confused by your use of the word "circuit". In electrical terms, a "circuit" is everything that loses power when you shut off one breaker. So given that definition, how many circuits are in this bathroom?

There are a zillion ways to power multiple things from the same circuit. You've already run some cables. They're not necessarily what I would have done, but let's see if we can work with what you have. If I understand correctly, these are the cables you ran:
• Power-Can#1
• Can#1-Switch#1.
• Can#1-Can#2.
So you have unswitched power only at Can#1. So you can run cables in either of the following two ways:
• Can#1-Vanity, and Vanity-Switch#2, or
• Can#1-Switch#2, and Switch#2-Vanity.

#3
11-08-05, 11:07 AM
kevha
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Hi
Thanks for the response
Let me try to clarify.
I indeed have one 'circuit' but intend to run one swicth for two lights and a different switch for two other lights.

Example - lets use ....
Switch 1 to Can 1 and 2
Switch 2 to Can 3 and 4

I have main power to can 1, then a cable form can 1 to can 2
Another single cable from can one to swicth one

You ideas for setting up the vanity lights -
Can#1-Vanity, and Vanity-Switch#2, or
Can#1-Switch#2, and Switch#2-Vanity.

Option 2 (Can 1 to Switch 2) - then from swicth two to vanity light(can 3) seems good to me. (Little room at the junction box that comes with cans 3 and 4.

My question would be how the wiring structure would look like at swicth two for this scenario.

thanks !

#4
11-08-05, 12:19 PM
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Join Date: Sep 2000
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The wiring for switch#2 would be pretty standard. You have one cable coming in, providing power, and one cable going out to the loads. So connect the two white wires to each other, and the two black wires to the switch. This is exactly the same as if power had come directly to switch#2 from the breaker.