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Questions tagged [junction-box]

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

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3answers
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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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3answers
6k views

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 4"...
10
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2answers
3k views

What is this thing on my junction box?

This thing is on my junction box but i don't know what it is or what it's for.
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3answers
750 views

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 ...
9
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4answers
2k views

Do the quick connectors in my new bathroom fan need to be in a junction box?

I recently replaced a bathroom extractor fan. The new model uses "quick connect" electrical connectors, where I stick the house wiring into this little plastic device, and apparently that's all! The ...
8
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3answers
13k views

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 ...
8
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3answers
59k views

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, ...
8
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2answers
14k views

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 ...
7
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2answers
22k views

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 ...
7
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2answers
44k views

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 exposed....
7
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3answers
2k views

Is this Junction Box too full?

I'm installing a flood lamp on my outdoor garage. So, I went to take look at the junction box, and to my surprise, it appears oddly filled: Filled to the point where I almost feel as though it's too ...
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2answers
24k views

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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4answers
8k views

Light fixture mounting bracket too small to attach to junction box

Installing a ceiling fixture. With the other fixtures I installed the bracket just screwed into the box. This one the bracket width is too small to screw in, the box is too big. What kind of adapter ...
5
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4answers
9k views

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 ...
5
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5answers
22k views

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 ...
5
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1answer
764 views

Is an electrical box fill classified by wires, cables or conductors?

Is a 12-2 NM cable counted as "3" (THREE) wires/cables/conductors since it has 3 wires in it or "1" (ONE) wires/cables/conductors? According to 370-16 with this 3 X 3.5 X 2 box, I can put "8" (...
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2answers
2k views

Inspector says that split bolts shouldn't be used on live connections. Right or wrong?

I installed a spa sub-panel on the exterior of my house. The inside wiring is NM-B 6AWG wire that goes to a junction box where it's spliced to 6AWG direct bury rated wire (the NM-B wire I had wasn't ...
5
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2answers
18k views

Do metal junction boxes used solely as pull boxes need to be grounded?

I am planning to pull three sets of four conductors (3 AWG wire) through 2" EMT conduit for a 30' length that is common to all three sets of wires, and then branch off at a listed metal junction box (...
5
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6answers
26k views

Ceiling Fan Junction Box Converter/Bracket 1/2 inch width difference

First time poster. I feel like I have researched everywhere and not found the answer I am looking for. I've called a few manufactures of ceiling fans who didn't have any answers either. I began ...
5
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2answers
34k views

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 ...
5
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6answers
55k views

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 ...
5
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2answers
192 views

Can I cut the protruding conduit to the floor level and cover it with junction box?

I've removed the old island which had the electric range, with the conduit coming from the crawlspace: The junction box was attached to the back of the cabinet holding the range. But the new island ...
5
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2answers
732 views

Can I splice wires in an old ceiling light box and should I add a ground conductor?

We have a beautiful house built in the 1920s. I was changing over a light fixture when I found that the ceiling of the room is wired with rubber wrapped 12(?)gauge wire that goes into a metal pancake ...
4
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2answers
4k views

Can an open junction box be allowed over an enclosed ceiling?

I am renovating my basement and there is currently a suspended ceiling. After removing some of the tiles I noticed there are some junction boxes without covers. I want to replace the suspended ceiling ...
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3answers
2k views

Are splices required in a junction box?

If I have a conduit with 6 wires (3 separate circuits), and I want them to split at some point, can I send the conduit (A) to a 4-inch square junction box and then send 2 wires to leave the junction ...
4
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2answers
4k views

Identifying wires in junction box

I have a fixture to change in my apartment. There is a black, a white and a red wire in the junction box. The old fixture was connected to the white and red wires only. This led me to believe that ...
4
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1answer
101 views

How is this junction box intended to be used?

I am in Europe and recently purchase this junction box: I have two questions: What is the intended use of the two brass colored busbars versus the three steel colored busbars? What is the intended ...
4
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2answers
14k views

Bathroom vanity light with no junction box

I just removed two bathroom vanity lights to replace them and discovered that there was no junction box behind either. One light was mounted over a stud and the other was right next the a stud. At ...
4
votes
1answer
1k views

Are these black marks near an electrical box signs of an electrical problem that I should be concerned about?

My garage has an electrical box with no receptacle in it, just wire-nutted wires. It came this way when I bought the house. A non-contact voltage tester shows that the black wires are hot. I was ...
4
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2answers
14k views

Is there a way to extend electrical wire where the splices can be finished over? [duplicate]

I want to extend some wires to relocate some switches. Normally one might do this by splicing new wires in and covering the junction box with a cover plate. Is there a way to permanently splice wires ...
4
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2answers
55 views

Will ceiling junction box support fan mounting?

Will current ceiling junction box support fan? Not exactly sure if a fan was mounted to it prior as I recently moved into this apartment. Somewhat older of an apartment and box doesn’t directly state ...
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3answers
3k views

Damaged Wire Insulation

I opened an electrical box today to a bit of a surprise - a little bit of exposed conductor on one of the wires! As far as I can tell, there is no damage to the conductor (12 gauge). Note that this ...
3
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2answers
492 views

Are splices made with insulated cable connectors required to be inside a junction box?

I have a need to splice a 6/3 romex and 4/3 romex in my attic. It would look something like this: 4/3 |-- (6/3) new destination -----| |-- (4/3) original destination I am looking at ...
3
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2answers
6k views

What are these “GENTEX” things on my walls?

My condo has these devices installed in each bedroom and in the living room; but I have no idea what they're for.
3
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2answers
20k 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 ...
3
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3answers
180 views

Can I split off a 20a with a conduit body?

So I am coming out of my subpanel with 1/2 in metal conduit and using metal handy boxes with NEMA 5-20 for all the receptacles on my two indoor branch circuits. One is dedicated for a window unit AC. ...
3
votes
3answers
801 views

240V/60A circuit in PVC on the ground

This home has a PVC pipe running from outside the garage, to a pool+spa setup. The electrical circuit seems to be carrying 240V/60A - (primarily for the water heater). It runs on the ground beside a ...
3
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3answers
2k views

Ground wire from the junction box

Background: I am a regular DIYer just starting out. My question is regarding the ground wire while installing a chandelier. I have just moved to a new location in Ontario, Canada. The house was built ...
3
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3answers
5k views

Connecting Three 12 Gauge Wires

When I purchased our house the previous owners recently installed electric baseboard heaters in rooms A, B and C. I did not want to keep these but needed more outlets so I had swapped the breaker at ...
3
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1answer
6k views

Is it against code to create a NM-B 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 ...
3
votes
2answers
2k views

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 ...
3
votes
1answer
129 views

How to organize multiple electrical wires going into an ultra thin recessed light?

I am installing ultra thin recessed light in the basement and it comes with a very small metal box (probably 2x4 in in size). Due to the old wiring of the house, there are 5 wires coming in totally: ...
3
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2answers
659 views

Should the wiring to my recessed light have a strain relief and a ground wire connected?

I had this can light installed by a contractor. It was not attached to anything, just resting on top of a hole in the ceiling. The cable is not entering through the plastic grommets. There are no ...
3
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2answers
719 views

Confusing Junction Box

I'm dealing with a junction box for an outdoor patio wall sconce that has three separate sets of black/white/ground. House was just painted, and the old sconce was already taken off, so I had nothing ...
3
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1answer
1k views

What exactly does 'Maximum of 8 No. 12 AWG Branch Circuit Conductors' mean?

I'm installing some recessed lighting, the lights are IC and wet location rated if that helps. The plates on the junction boxes attached to the cans say' Mamixum of 8 No. 12 AWG branch circuit ...
3
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1answer
322 views

Wiremold Ceiling Fan Box not compatible with Harbor Breeze mounting bracket. How to fix?

I am surface mounting a Harbor Breeze ceiling fan directly to a wooden beam using a Wiremold Metal Ceiling Fan junction box. The wiremold box has two #10 screws which go from the back of the mounting ...
3
votes
1answer
211 views

Light junction box near water

We are wanting to put in sconce lighting in our bedroom. The junction box would be about 16 inches form our water shut off valves and bleed valves. Is there any issues about putting the lights in this ...
3
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2answers
2k views

How can I mount an electrical box to exterior foam board?

I am trying to replace an exterior light fixture next to my home's main entry way: The original light was mounted to a low-profile bracket that was mounted directly to the PVC "box" shown in the ...
3
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5answers
58k views

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 ...
3
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2answers
225 views

Need help with installing Ceiling light

I'm trying to install a ceiling light. I found a convent place to put a on/off switch. There is a receptacle at the bottom of where I would like to add the on/off switch for the light. So what I ...