seeking advice for a three way

angalaluNovember 21, 2012

wiring situation..

I have a one day opportunity, before floors go down, to run some wiring beneath the subfloors and need to configure the following three way switch situation: switch (fed from a nearby outlet), light fixture, switch, light fixture, the end. I would like both switches to operate both of the light fixtures. I have some elementary knowledge of wiring, however, my B&D Home Wiring book does not cover this specific configuration and I can take a guess, but would prefer to have some advice from someone out there with better electrical wiring knowledge than self. Many thanks in advance.

Thank you for reporting this comment. Undo
mike_kaiser_gw

Frankly, if you're unsure about wiring a circuit it might best be left to a licensed electrican.

The following picture in pretty good assuming you are going to use NM cable (i.e., Romex). In your case the cable labeled "power source" would come from the nearby outlet. What the drawing doesn't show is the ground(ing) conductor, which needs to be maintained throughout the circuit. The second drawing shows the grounding conductors more clearly. Note that the ground(ed) conductor (neutral) goes only from the first switch (where the "power source" comes in) to the fixture.


    Bookmark   November 22, 2012 at 1:06AM
Thank you for reporting this comment. Undo
angalalu

Hi Mike, thanks for the response. I am actually not going to be connecting the wires. An electrician will be putting in the switches and the fixtures. My job is to get the appropriate cable run under the subfloor before the floors are laid (after which point, many holes will need to be made in walls that have been freshly smooth coated. The actual configuration is: light switch, light fixture, light switch, light fixture. So there is one more light that needs to be included in your diagram. The big question is: Do I need to include (2) 3 wire romex between each fixture?

    Bookmark   November 23, 2012 at 1:47PM
Thank you for reporting this comment. Undo
mike_kaiser_gw

You would extend the circuit from the first fixture to the second fixture with two wire cable (Romex). Without doing any fancy drawing I indicated the wire connections with the arrowed lines.

The rest of the wiring should not be changed.

    Bookmark   November 23, 2012 at 11:44PM
Thank you for reporting this comment. Undo
angalalu

thanks Mike! the 12/2 Romex can go directly from fixture to fixture, no need to pitt stop at 2nd switch location, correct?

    Bookmark   November 24, 2012 at 2:53PM
Thank you for reporting this comment. Undo
weedmeister

I'm not that bright, but 12/2 is kinda large for a simple light circuit. 14/2 should be sufficient and a bit cheaper.

    Bookmark   November 28, 2012 at 3:33PM
Thank you for reporting this comment. Undo
mike_kaiser_gw

The gauge of the wire is predicated by the amperage of the circuit. Typically 14 gauge for 15 amps circuits and 12 gauge for 20 amp circuits.

There's some exceptions for fixture whips but I'm not sure we could call this one.

    Bookmark   November 28, 2012 at 10:20PM
Sign Up to comment
More Discussions
Disposer Power Cord
I recently bought a GE disposal online. The model is...
africanboy
Subpanel Question
I have a 100 amp panel being fed by #4 awg copper wire I...
Calo Renovations
Wiring in a 1 1/2" thick wall cavity
I need to run 12/2 wire thru an existing thin wall....
baker1mich
1 of 2 security light bulbs keep going out, do i need a new light?
I have a security light fixture in my carport that...
tlbean2004
Inspection Report
Had a gorgeous 1909 house inspected yesterday and don't...
cmae17
Sponsored Products
Crystorama Athena Chandelier - 23W in. Champagne - 4908-CM
$700.00 | Hayneedle
X Games 18 in. Freestyle Bike - 31812
$112.99 | Hayneedle
Oceanview Outdoor Wall Sconce by Philips Forecast Lighting
$50.00 | Lumens
Inhale Flushmount by Philips Forecast Lighting
$218.00 | Lumens
Simplicity by Strasser Cabinets 30 in. Tri-View Medicine Cabinet in Natural
Home Depot
Tronk Design | Williams Coffee Table
YLiving.com
© 2015 Houzz Inc. Houzz® The new way to design your home™