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Old 10-13-2012, 12:13 PM   #1
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Installing rough electrical porch light box


Hi folks,
I'm building a detached workshop and I'm doing the rough electrical. I've sheathed the framing with 1/2" plywood and will be prepping it for stucco. I'm installing a few outdoor lights and outdoor receptacles. I purchased the Arlington DBVM1C for the receptacles, so that is not in question.

I'd like to know how others handle the rough-in of the round boxes for the outdoor lights? I've seen the round 4" ceiling boxes used but I'm concerned about water infiltration. If you use these, which model? How do you secure them to the frame? How do you flash for new stucco?

I know there is a product called Quick Flash that looks to be a round 4" box with a wide flange. Has anyone tried these?

Thanks.

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Old 10-13-2012, 12:16 PM   #2
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Installing rough electrical porch light box


How much room will you have between the face of the finished stucco and the plywood? Are you installing foam insulation on the outside of the plywood?

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Old 10-13-2012, 12:35 PM   #3
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Installing rough electrical porch light box


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How much room will you have between the face of the finished stucco and the plywood? Are you installing foam insulation on the outside of the plywood?
k Buz,
I'd say about 3/4" of stucco will be applied over the plywood which will have Tyvek WRB and Grade D paper. No to foam insualtion.
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Old 10-13-2012, 12:43 PM   #4
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Installing rough electrical porch light box


I'd screw a 1/2" pan box or a 5/8" fan rated pan box to the plywood. Be careful of your wire fill with pan boxes.
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Old 10-13-2012, 12:48 PM   #5
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Installing rough electrical porch light box


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I'd screw a 1/2" pan box or a 5/8" fan rated pan box to the plywood. Be careful of your wire fill with pan boxes.

Thanks. I thought about using those, but, you're right, the fill capacity is the problem with those. I'll be putting four lights up and that will mean more than one 14/2-g into 3 of the boxes. The inspector would object, I'm sure.
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Old 10-13-2012, 12:49 PM   #6
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Installing rough electrical porch light box


Add J-Boxes inside the garage any only feed the pan box with one cable.
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Old 10-13-2012, 01:06 PM   #7
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Installing rough electrical porch light box


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Add J-Boxes inside the garage any only feed the pan box with one cable.

That sounds like a good option and easily done. I may do that.

Metal or plastic? I'm using plastic inside, but I can ground a metal pan box, no problem, plus it is stronger.

So, if I do it this way, would this be the correct procedure?

1. Drill hole 1/2" through plywood and feed cable.
2. Apply Tyvek and caulk or tape where cable comes thru Tyvek.
3. Install box.
4. Then Grade D paper with stucco lath, stucco.
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Old 10-17-2012, 04:14 PM   #8
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Installing rough electrical porch light box


I decided to use a 4/0 round plastic box with the side nails and a Quick Flash panel.

Can someone give me some pointers on nailing the box to the stud?

I need to cut a round hole in the sheathing, but it will be difficult to hammer the nails because they're very close to the interior side of the sheathing.
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Old 10-17-2012, 04:29 PM   #9
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Installing rough electrical porch light box


Remove the nails from the box and use 3" screws in their place.
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Old 10-17-2012, 04:42 PM   #10
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Remove the nails from the box and use 3" screws in their place.
Thanks sublime2,
That's an excellent idea. I also thought about nailing it to a short length of 2x4, cutting the round hole in the sheathing, and securing the 2x4 w/box to the framing.

But, I like your idea more because it lets me place it where I want.

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