How To Properly Install Junction Box Into Rafter In Attic

Making up joints in an attic.

How to properly install junction box into rafter in attic.

Junction box mounting locations there are two options for mounting boxes that are wholly contained within the attic. Mount the j box to the side of a framing member such as a wall stud ceiling rafter or floor beam using two 8 by 1 inch wood screws. If necessary trim the wires as needed and strip 3 4 inch of insulation from the end of each wire using wire strippers. Active oldest votes 1 junction boxes on rafters are fine but make sure there s at least 1 5 clearance from the back of the junction box to the outside edge of the rafter since roof sheathing properly installed will be nailed with 1 5 penetration into the rafter and cables enter the junction box right at the back.

If you come across a wire or romex cable that nee. You can attach them to the joist s side surface called the face or to the joist s top surface called the edge. If the box has breakaway plastic tabs most often found on boxes that will be nailed to the surface push the tabs out by hand or with a screwdriver. Fasten the cable using a wire staple within 12 inches 30 cm of the box to secure it.

The cable sheathing outer jacket should extend 1 4 to 1 2 inch into the box beyond the clamp and the individual conducting wires should extend about 6 inches into the box. Feed the cables through the clamps and into the box.