Wiring from Plug for wall sconces

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Old 02-27-20, 11:09 AM
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Wiring from Plug for wall sconces

HI again. Thanks as always for your help. I'm wiring for wall sconces. My plan is to take power from a plug and run the wire to a switch that in turn feeds a light box which is linked to another light box. Not sure how to make any of these connections. I have inserted a diagram for your review. thanks
 
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Old 02-27-20, 11:32 AM
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In receptacle.
Connect all whites together and to receptacle silver screw.
Connect all black together and to receptacle gold screw.

At switch'
Connect whites together.
Connect one black to each screw.

At light match all the colours. all the whites together. all the blacks together.

In all the boxes all ground connect together.
 
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Old 02-27-20, 01:48 PM
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Thanks! Just to be sure, in the receptacle there are currently 2 blacks and 2 wires screwed into the receptacle. Now i have another wire coming from the switch (1 black, 1 white). I believe you said to attach all black together and all white together and attach to the receptacle. So that means there will now be 2 (1 brass,1 silver) that won't have anything attached? thanks
 
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Old 02-27-20, 05:12 PM
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You would need to pigtail all 3 off each and attach to the receptacle.

Your box may not be big enough to add a third cable.
 
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Old 02-27-20, 05:17 PM
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The two screws on each are joined. They are in effect the same point. You need to use pigtails since only one wire is permitted under a screw.

 
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Old 02-27-20, 05:54 PM
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Often, too many wires and other parts for the outlet box lead to complications, and once in awhile it turns out easier to run a new branch circuit from the panel..
I think this is right for box fill in Canada.
One point for each entering hot or neutral conductor (6 points total)
Two points for the receptacle unit (wall plug unit) (2)
One point for all the box clamps (1)
One point for all the ground wires (1)
One point for 2'nd, 4'th, 6'th, etc. wire nut (marrette) each (1)
No points for jumper wires wholly within the box (pigtails) (0)
Total points: 11. One and a half cubic inches per point for 14 ga. wire equals 16-1/2 ci box needed.
 

Last edited by AllanJ; 02-27-20 at 08:34 PM.
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Old 02-27-20, 06:30 PM
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I don't think we count box clamps. There is a one count for fixture studs or hickeys. I never knew for sure what that was but I don't think it is box clamps. But all the rest is correct.

There is actually a line in the code stateing ignore them.

The total usable space in a box considered under Table 22 shall be considered to be the internal
volume of the box and shall disregard any space occupied by locknuts, bushings, box connectors, or
clamps.
 
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Old 02-27-20, 06:49 PM
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Couldn't I just use the push in friction holes in the back of the receptacle to add that wire?
 
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Old 02-27-20, 08:11 PM
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You could, but I would not recommend it. Push in back stabs are a very common source of bad connections.
 
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Old 02-29-20, 05:34 AM
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thanks! appreciate everyone's help
 
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