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Old 06-05-2010, 09:22 AM   #31
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Wiring lights in new construction


If the light hugs the wall there is mostly vertical shear force on the box and so any box should do.
Even if it doesn't hug the wall and projects outward, I can't imagine a small light torqueing a box out of the wall.
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Old 06-05-2010, 09:45 AM   #32
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Wiring lights in new construction


Total outward protrusion (mounting plate and glass fixture) just over 6".
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Old 06-05-2010, 10:04 AM   #33
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Wiring lights in new construction


Do not listen to the other poster. He is an engineer and knows nothing about electrical construction. Just the comment "vertical shear force on the box" should be enough for you to stay clear unless you want to turn this SIMPLE job into a science project. Sorry Yoyizit, but you are getting on my nerves.

Support a metal or plastic box securely to the framing members. I prefer metal for this application, but plastic will do just fine. While pulling the fixture up against the outside wall with the fixture screws will be tight, it may not stay tight. So mount the box at the correct depth and secure it well.
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Old 06-05-2010, 10:37 AM   #34
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Wiring lights in new construction


Appreciate the concern. However, will use 4" metal box and secure firmly to a vertical stud with 2-3 screws. Any "pull" outward will be against quarter inch drywall. Than again, I could easily brace it underneath with a cross piece of 2x4.

Related issue: Anyone aware of anything in code preventing you from mounting a light on the wall next to interior steps (4)? Would be above level where would interfere with pedestrian traffic. Also, above an entrance door? Appreciate any thoughts.
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Old 06-06-2010, 10:29 AM   #35
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Wiring lights in new construction


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Originally Posted by Mi Feller View Post
Related issue: Anyone aware of anything in code preventing you from mounting a light on the wall next to interior steps (4)? Would be above level where would interfere with pedestrian traffic. Also, above an entrance door? Appreciate any thoughts.
No issue at all. NEC and common sense both prevail in this post.
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Old 06-06-2010, 11:21 AM   #36
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Wiring lights in new construction


It is better if the nails holding the box to the stud are at the top and bottom edges of the box as opposed to being in the middle. That is, as far apart vertically as is practical. It is better if screws are used instead of nails.

A rectangular box will hold the light better than a square box because the closer to the stud the light is, the less likely it will tilt out of the wall, box and all.

The metal strip that spans the screw holes in the front of the box should be enough to hold the light in place, if that is what comes with the light for mounting purposes.
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He is an engineer and knows nothing about electrical construction. Just the comment "vertical shear force on the box" .
He knows plenty about electrical construction, but he includes plenty of numbers that some folks feel they need a Ph.D. to understand.
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Last edited by AllanJ; 06-06-2010 at 11:27 AM.
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Old 06-06-2010, 11:27 AM   #37
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Wiring lights in new construction


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Originally Posted by J. V. View Post
NEC and common sense both prevail in this post.
I'm glad to see that you have this thread under control!
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Old 06-10-2010, 11:19 AM   #38
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Wiring lights in new construction


Understand generally not a good idea. Just wonder if NEC has a hard fast rule. Locating porch light switch on wall where door swings against would put it nearest the light and result in significant savings on wire and time. An open door would hide the switch, but not physically touch it. Thanks for thoughts.
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Old 06-10-2010, 11:24 AM   #39
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Wiring lights in new construction


Not a problem
They do not really state on most placements
Around stairs is one place they do specify to some degree

As long as that light doesn't provide light for stairs you could put it in a closet
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