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.
Is it OK to put junction box in attic?
Yes, junction boxes in attics, suspended ceilings and crawl spaces are legal. Basically, the rule is that ALL wire connections must be accessible. In other words, you can’t cut a hole in a wall or ceiling and bury a junction box by covering it with drywall, paneling, tile, or whatever.
Can NM cable be used in attic?
Yes. NM cable may be exposed in attic. This is very common in modern dwellings. Armored cable / MC is not necessary in your case.
Where should junction box be placed in 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. Mount the box in such a way that all the cables entering and leaving the box will be set back at least 1 ¼ inches from the face of the stud, rafter or beam.
Can a junction box be in the ceiling?
Junction boxes, with blank covers are allowed above a suspended ceiling as it is not considered a closed space. The wires that are loose and wirenuted need to be put in a j-box. Also, clamps need to be used at each wire going into a j-box.
Can junction boxes Touch insulation?
Yes, you absolutely can. You can lay insulation around the junction boxes as well. Making sure that the insulation is of a fiberglass material will not only ensure a fireproof setup but also reduce airflow from the home through the attic.
Can you bury a junction box in insulation?
“They can be buried inside insulation provided it can be removed to access the box. Foamed-in-place insulation should not cover a box.”
Can you staple Romex to rafters?
It is okay to staple Romex along the floor joists, provided you keep it at a safe distance from the edge. This will help you protect it from screws and nails and any critters that may be crawling along the edges – since that is where insects usually decide to burrow. You can also run Romex THORUGH floor joists.
Where can NM cable not be used?
Types NM and NMC cables shall not be permitted as follows: In any dwelling or structure not specifically permitted in 334.10(1), (2), (3), and (5) Exposed within a dropped or suspended ceiling cavity in other than one- and two-family and multifamily dwellings. As service-entrance cable.
Can Romex running over ceiling joists?
Yes, you can run cable through bored holes in the joists if that’s what you prefer. Rarely have I worked on a job where the amount of cabling was substantial enough to warrant engineering/structural integrity concerns. Pipe – yes; typical Romex – no.
Where are junction boxes allowed?
Junction box covers must remain accessible; they cannot be covered with drywall or other surface material. A junction box is most often used where an electrical circuit branches off in two or more directions from a location where an outlet or fixture is not practical.
Does a junction box have to be attached to a stud?
They don’t need to be fastened to a stud, so you can install them anywhere.
How do you install a junction box on a finished ceiling?
Quote from Youtube video: Once you have the wire in the box you're going to push. The box back into the ceiling. And the box will have this particular one has three clips. So as you screw. The screws in the clips.
How do you install a junction box in an attic?
Quote from the video:
Quote from Youtube video: This. And I wanted it I wanted it somewhere where it was more accessible. So I could put a junction. Box up here and here's my little junction box right here this little plastic box.
How do you insulate around a junction box?
Quote from the video:
Quote from Youtube video: Take a marker make them up line where the top and the bottom of the electrical. Box are. Put the insulation on the ground compress it and put this line exactly on the edge of the insulation.
How do you insulate behind an electrical box?
Quote from the video:
Quote from Youtube video: And I'm gonna get the fiberglass insulation. I'm gonna tuck it into the bottom of the cavity. Now you may not have to do this but just because of the way that the wood is this is what I'm doing.
Can Romex touch ductwork?
As long as there are no sharp edges in the chase that might physically damage the cable, there’s no code violation if Romex touches metal hvac supply or return ducts.
Can electrical wires touch insulation?
It is perfectly safe for household insulation to touch wires provided the wires or cables are electrically insulated. There also are techniques to make insulation fit better around wires. However, under no circumstances should thermal insulation make contact with live uninsulated wires and cables.
Do you put insulation over or under wires?
Quote from the video:
Quote from Youtube video: It put it over the top and drape. It down when you come into account with the wiring that's run on the outside.
Can you put insulation over plywood in attic?
I agree that as long as the insulation under the plywood is tight to the bottom of the plywood that laying additional insulation on top should be fine. The plywood should add a little insulating value itself.
