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Old 06-12-2012, 04:06 PM   #1
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Adding 2 outlets in the middle of a series of outlets - wiring question


Hello, Im adding 2 outlets (both in the same stud bay) off existing outlets in my garage, one closer to the floor and one parallel to the existing outlets.

Here is a diagram to show my situation and where the new outlets are going in. (red is new outlet or wire, everything is hot)


outlets 2 and 3 are the outlets I am adding. my question revolves around the wiring.

Ive already snaked new wire from 1 down to 2 and from 2 up to 3, so that was the easy part. the question is how to handle the outgoing wire to the rest of the outlet series

so I see 2 options here


option 1 would require moving the outgoing wire from 1 to 3, and is difficult in this situation, but it seems 'right' to my eyes.

I wanted to know if option 2 is acceptable, which would be to keep the existing output wire to the rest of the series from 1 (instead of moving it to 3), and adding another output wire down to outlet 2 .
thus having 2 output wires from the same outlet.


I havent seen this before, so I wasnt sure if it was a good idea

thanks in advance!

Last edited by Evan55; 06-12-2012 at 04:11 PM.
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Old 06-12-2012, 04:54 PM   #2
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Adding 2 outlets in the middle of a series of outlets - wiring question


Option 2 will work electrically but it is possible that box #1 may be too small for all of the wires.

Three cables coming into the box is six hot or neutral wires ends, 6 points.
The receptacle itself, 2 points.
All the ground wires, 1 point.
All the clamps or fingers holding the cables on the box, 1 point.
Total of 10 points, 2 cubic inches per point for 14 gauge wires, 20 ci box needed.
(For 12 gauge wires 2-1/4 ci per point, 23 ci.)
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Old 06-12-2012, 05:25 PM   #3
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Adding 2 outlets in the middle of a series of outlets - wiring question


Since they have to be protected by gfci, just use option 1.
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Old 06-12-2012, 05:46 PM   #4
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Adding 2 outlets in the middle of a series of outlets - wiring question


Quote:
Originally Posted by gregzoll View Post
Since they have to be protected by gfci, just use option 1.
there is already an upstream GFCI, so thats not an issue.

option 2 is the much easier option, so I guess the real question, is option 2 ok and safe.

Thanks Allan, how do I tell if its a 20ci box? its an original box so I cant take it out.
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Old 06-12-2012, 07:40 PM   #5
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Adding 2 outlets in the middle of a series of outlets - wiring question


Forget option two, go with one. Trust me on this one. I have done something like 2 in my garage, when I rewired it, but I always use the deeper boxes, for those times that I made need more than two Romex in a box, along with a device.
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Old 06-12-2012, 07:50 PM   #6
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Adding 2 outlets in the middle of a series of outlets - wiring question


A plastic box will have the size stamped on the back of the box. A metal box you would need to know the depth of the box and someone could look it up.
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Old 06-13-2012, 07:45 AM   #7
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Adding 2 outlets in the middle of a series of outlets - wiring question


If you use a ruler or tape measure (and a barbecue stick to measure the depth) you can get a good enough figure for the size of the box.

If you don't mind, you can add rectangular extension rings on the outside of the box (and get longer screws to hold the receptacle on) to gain more interior space for an existing box.
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Old 06-14-2012, 09:43 AM   #8
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Adding 2 outlets in the middle of a series of outlets - wiring question


Thanks, looks like its a 16 cu/in box. As it turns out, option 1 wont work because the outgoing wire goes back to the left and up, and is stapled to the stud.

box extension sounds like a great option, hadnt thought of that.
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