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10-06-2009, 07:38 PM   #1
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## 3 way switch question

quick question i hope!
I have a light that is controlled by two 3-way switches.
i have everything hooked up correctly for the two 3-way switches to work, the problem im having is that the circuit continues to another light from the light that is hooked to the 3-way switches, i need to know how to keep constant power to the other light.

10-06-2009, 08:03 PM   #2
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Quote:
 the circuit continues to another light from the light that is hooked to the 3-way switches
You obviously need to feed that light fron a source of constant power.

Is there constant power in the light box it is fed from or is it just the switch leg in there?

You may have to feed it from a switch box or receptacle box.

 10-06-2009, 08:13 PM #3 Newbie   Join Date: Oct 2009 Posts: 7 Rewards Points: 10 constant power comes in box to 3-way, then goes to light, then another 3-way goes to the light, and the circuit i need to tie into is in the light box as well

 10-06-2009, 08:21 PM #4 Member   Join Date: Oct 2007 Posts: 2,294 Rewards Points: 1,000 Too vague. No patience for 50 questions. Describe the cable type and route. 2 wire cable = black and white. 3 wire cable = black red and white. Ignore the bare ground for this discussion Use the terms switch one and switch two for the two 3 way switch locations.
 10-06-2009, 08:36 PM #5 Newbie   Join Date: Oct 2009 Posts: 7 Rewards Points: 10 i have a 2 wire cable for constant power coming into switch one, the white constant connected to white going to light, black constant connected to switch, black and red connected to switch going to light, the white wire is connected to light, the black wire is connected to (3 wire cable)white wire going to switch two, red is travel wire from switch one to switch two, and the black wire from switch two is connected to light. i hope this is not too confusing
10-06-2009, 08:53 PM   #6
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Quote:
 i hope this is not too confusing

OK...focus.

Quote:
 i have a 2 wire cable for constant power coming into switch one
You started off great but quickly digressed.

Describe the cable type and entire route. Forget the wiring connections for now.

 10-06-2009, 08:55 PM #7 Newbie   Join Date: Oct 2009 Posts: 7 Rewards Points: 10 2 wire constant into switch one, from switch one 3 wire cable to light, 3 wire cable from light to switch two, 2 wire cable from light to another circuit
 10-06-2009, 09:05 PM #8 Member   Join Date: Oct 2007 Posts: 2,294 Rewards Points: 1,000 THERE you go You don't have a hot in switch #2 (one wire short) You need to feed the "other circuit" from switch one instead of switch #2 edit. Actually that's all jacked up. I don't see how it can even work the one light properly? Are the walls still open? Last edited by 220/221; 10-06-2009 at 09:12 PM.
 10-06-2009, 09:07 PM #9 Newbie   Join Date: Oct 2009 Posts: 7 Rewards Points: 10 but the other circuit is in the light box, do i need to move the wire from the light to switch one or another power source? the light works fine the way it is Last edited by theBuilder; 10-06-2009 at 09:24 PM.
10-06-2009, 09:25 PM   #10
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Quote:
 but the other circuit is in the light box, do i need to move the wire from the light to switch one or another power source?
Crap.....again I am having trouble with your terminology. The only "power source" you have now is in switch #1.

You have

2 wire constant into switch one, from switch one 3 wire cable to light, 3 wire cable from light to switch two, 2 wire cable from light to another circuit

The way I read it, "another circuit" is actually "another light" that for some reason needs constant power (pullchain?)

Also, you said that the 3 ways worked but I can't see how.

This would be a standard method of wiring

2 wire constant into switch one,

3 wire cable from switch one to switch two.

2 wire cable from either switch to light

2 wire cable from switch one to "another circuit/another light that needs constant power"

 10-06-2009, 09:33 PM #11 Newbie   Join Date: Oct 2009 Posts: 7 Rewards Points: 10 well this was a bathroom that we are renovating, and the power to part of the house gets its power from the light in the bathroom your method is right except i have a switch on either side of the light, and the "other circuit" is just going to the adjacent room and bathroom to supply them power I have the light and switches hooked up exactly as you should with a switch/light/switch hookup, i just can't figure out which wires to get my continuous power from out of the light box to go to the rest of the house
10-06-2009, 09:34 PM   #12
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Quote:
 quick question i hope!

I see how the 3way is working. It is unothodox (in my area anyway) but it works.

The only constant power you have is in switch #1 so you will have to feed your other bathroom light from switch #1 or some other source. There is no hot or neutral in sw #2 and no hot in the light box.

 10-06-2009, 09:36 PM #13 Newbie   Join Date: Oct 2009 Posts: 7 Rewards Points: 10 ok, well i'll work on that, i appreciate your help, ha, yeah i guess it wasn't such a quick question. thanks again
 10-06-2009, 09:58 PM #14 Member   Join Date: Mar 2009 Posts: 780 Rewards Points: 500 I believe this drawing is what you have the brown wire in the drawing is what is missing.
10-06-2009, 10:29 PM   #15
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You do not have a constant hot at the light. You only have neutral and switched hot and two traveler wires. If you want to power your second light from the first light then you need a fourth wire from switch one to the fixture.
You should pull power for the second light from the first switch with the power cable.

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