Octagon and standard-size round boxes range from 1 1/2 to 3 inches deep and are the standard box for ceiling- or wall-mounted light fixtures weighing up to 50 pounds. They provide much more room for wiring than shallow round pan boxes and can be used as junction boxes.
How do you size an electrical box?
For straight pulls, 314.28(A)(1) requires that the length of the box be at least eight times the trade size of the largest raceway. To correctly apply 314.28(A)(1), just multiply the largest raceway size by eight. The box must be at least as long as that number.
How much weight can an old work box support?
An old work box will support up to 50 pounds of weight as long as it is attached to a support, however, if it is only attached to the sheetrock then the weight-bearing limit is zero. The weight limit is different depending on the manufacturer, so it’s best to double-check the limit for your model.
What is a cut in box?
Cut-in boxes (also known as remodeling boxes) are the type of electrical boxes that you use when you are working with an already finished wall. Usually, the biggest problem that you are faced with when doing this kind of work is that different methods are used for installation depending on the type of cut-in box.
How deep is a shallow junction box?
Depth: 1-1/2″. Side Knockouts: (8) 1/2″ & (4) 3/4″. Cubic Inches: 22.5″.
Can you screw an electrical box to a stud?
Screw-on handy box—attach this box directly to the framing. Box with flange—nail the flange to the side of an exposed stud or joist, aligning the front so that it will be flush with the finished ceiling or wall. Nail-on electrical wall box—butt this box against a wall stud and nail it on.