A junction box is a container used to enclose electrical connections (junctions).

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What can I do if I need another gang in a junction box but there isn't space in the wall?

I have a dual gang junction box installed in a space between 2 studs in the wall. I want to add swap the box for a 3-gang box to add another switch for a ceiling fan, however when I took the cover ...
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191 views

What is the proper way to leave unused nonmetallic sheathed cable inside walls or ceilings?

The question pretty much sums it up. I nailed through a live wire in my ceiling. Rather than splice it and install a jbox, I ran a new run to the outlet. However, I took a slightly different route ...
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In a multi-gang box, are neutral wires paired with specific hot wires?

I have a four-gang box that I'm installing new dimmers in. Currently all of the neutral (white) wires coming into the box are connected together (and not to the dimmers). The new dimmers require ...
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28 views

What fastener to use to attach 4" circular pan to steel stud?

I need to attach a 4" circular pan circuit box to a steel stud in order to hang a bathroom vanity light fixture. The fixture weights less than 10 lbs, but assume some future homeowner will want to ...
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60 views

How do I seal an electrical box for a ceiling fan?

We recently installed new electrical boxes and hung fans from them. We caulked around the boxes to seal off airflow into the attic. There are several small holes (and one has a medium sized hole) on ...
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606 views

Is it against code to create a romex to thhn junction inside a conduit body?

I'm installing a 60A subpanel in my detached garage. I'll be running 2GA conductors, to leave the possibility of upgrading to 100A service in the future open. The Breaker I'll be using on the main ...
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170 views

Replacing an outdoor junction box - need some help

Last year we had a contractor come to our house to do a few jobs. In the process, he ended up saying he busted a light bulb on our security light, and said he would fix it. About a week later, we ...
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What is the proper way to install a junction box above a dropped ceiling?

I'm doing some remodeling in my basement and part of that work involves moving a switch. When I was tracing the wires for the switch I found this above my dropped ceiling: Now, I'm no electrician, ...
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Doorbell for a rectangular switch box [closed]

I have a doorbell button that goes on a rectangular switch box that is outside my house. The rectangular switch box is inside concrete. Since the doorbell button is outside exposed to the weather, the ...
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At what voltage are “low voltage” junction boxes not appropriate?

120VAC needs a proper, enclosed junction box. Speaker cable, data, and low voltage power are fine with the more open low-voltage boxes. At what voltage are the enclosed boxes required? Do PoE lines ...
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How do I chain edison bulbs together with a junction box?-

I want to chain 6 Edison Lights They are a Standard Edison base, E26 medium, 120 volts. I am going to be hanging them on a 18 gauge wrapped copper wire. I am wondering how to wire them together and ...
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What type of junction box cover do I need?

We are building a set of shelves to cover up a sewer pipe in my basement. The shelves will have a false back that covers the pipe then have usable shelves in front of it. The only problem is that ...
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Why are the neutral wires not connected in this box?

I want to connect the wiring from my shed into a junction box on the ceiling in the basement. I opened the box to see what I was dealing with, I figured it should be simple, there is only 2 wires ...
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How do I install a junction box with NM-clamps?

I bought a junction box in order to splice three Romex together along the 2x4's in the ceiling of my (unfinished) basement. The box looks like this: When I bought it, I assumed that I could just ...
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Can I install junction boxes in a closet, and if so, what kind of box?

We are designing circuit runs for a ground floor of a house flooded by a hurricane and it is best to use a few junction boxes to run the circuit branches. One reason for the junction boxes is to keep ...
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How can I install a ceiling fan that needs a 4“ box where I only have a 3” box?

As part of a home renovation project I discarded my old ceiling fan and have bought a new one. When installing the new one the electrician tells me that I have a 3" junction box and that I'll need a ...
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Can I screw a ceiling fan electrical box directly to the joist?

I am putting in a ceiling fan in a bedroom. It is a smaller one approx. 18 lbs. The remodeling-type expander brace failed, so can I just screw one side of the box to the joist? (I cannot access the ...
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Can I cover junction boxes in the attic with insulation?

This may be a duplicate of What are the codes for electrical wiring in attics? I have an attic which is accessible via a ladder through an access panel in the garage and in a bedroom. The trusses ...
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How does one typically do “Old Work” with metal junction boxes?

I am trying to add a light fixture to a room. I have access to the studs in the wall (new wall being added to the room), but the ceiling is drywalled. There is no attic access. Unfortunately, the ...
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How should I rewire this situation?

In my dinning room, I have this: There is a wire run going up through the floor from the basement. It then goes outside the wall, around a stud (or studs, I'm can't tell there is more than one), back ...
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Is it possible to install a ceiling fan without an electrical box?

A while ago I had some electricians install a ceiling fan mount. Now that I've finally gotten around to installing a fan I've discovered that they didn't install any sort of electrical box to house ...
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How to tell if a ceiling junction box is braced to hold the weight of a ceiling fan?

My new home is almost done being built, and one of the extras I asked for was for two of the rooms to have junction boxes in the ceiling suitable for hanging a ceiling fan in the future. The light ...
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Is there any acceptable way to cover a junction box?

The outlet for my range hood was misplaced. It needs to be 4 inches to the side. I can make the junction and move the wiring to the new location but I really don't want to have the empty plate ...
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How to open NM box knockouts?

I've found the knockouts in NM boxes hard to fully open. I've had trouble with both Carlon boxes and Madison Smart Boxes. The plastic molded to make the knockout is very resistant to actually being ...
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How can high and low voltage be mixed in a junction box?

So I'm aware of the standard rule of thumb, keep high and low voltage away from each other, preferably on opposite sides of a stud. However, while looking at some properties, I'm seeing telephone and ...
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Is this an adequate junction box wire job using a standard electric box? (pic included)

I needed to splice a wire to repair nicked wire insulation, but I didn't feel like running to Lowe's just for a junction box. Instead, I used a regular electrical box. The wire comes up from the ...
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What's the minimum depth that an electrical box can recess into a finished wall? Does it have to be flush?

Do electrical boxes have to be flush to the finished surface? Can they recess any depth into the wall by as much as 1/8" or 1/4"? Edit: I appreciate everyone offering alternative solutions to ...
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I modified a nail-in electrical box to use screws instead of nails. Is there some code that prevents that?

Ever since I dove into the electrical side of things with my project, I've encountered a bunch of code restrictions. One thing that wouldn't surprise me if it was a violation of code is what I've ...