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

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How to properly bond metal junction box with 6 AWG conductors

What is the appropriate way to bond a metal junction box containing a receptacle wired with 6 AWG wire? It seems that most metal junction boxes have a 10-32 tapped hole to accept a ground screw but ...
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44 views

Attaching Air Compressor To Junction Box

I have a 4 inch metal junction box with a 3/4" mud ring attached and recessed into the drywall in my garage. I want to connect an air compressor to this junction box directly without using a plug. ...
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1answer
57 views

What is the purpose of these removable “collars” on ceramic light fixtures

This fixture happens to be plastic, but all my ceiling juntion box mounted 600w rated light fixtures have a removable collar. I don't see the point in this extra part. Is there some sort of shade I ...
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58 views

What can I use to fix a gap between the light fixture and the ceiling?

It's a very old house that the ceiling is made out of lath and plaster so it would be too much work to dig a hole to put in a large junction box for the wires. They won't fit in the base of the light ...
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42 views

How to tell if old ceiling light box can support ceiling fan?

I want to replace a small hanging chandelier with a ceiling fan and am trying to figure out if the existing box can support a fan. I don't see labeling on the box itself but noticed this large rod ...
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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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37 views

Building a lamp with a docking station to power my phone. [closed]

I want to make a lamp with a docking station that can power and charge my phone, can I use a junction box to combined both cables so only one cable goes to the plug?
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217 views

Mount Ceiling Fan to Old Junction Box?

Is there anyway to safely mount a ceiling fan to this type of older ceiling junction box (see the photos)? I rent an old 1920's built house where an old hanging light fixture junction box was covered ...
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3answers
2k 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 ...
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1answer
110 views

Round hole, rectangular junction box

I am installing a new light fixture into ceiling. There is a round hole there right now (from a recessed light that I removed). The problem is this round hole is just short in diameter of standard ...
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187 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 ...
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257 views

Wiring a Junction Box: 1 source in, 2 sources out

I have an existing junction box and currently 1 source from the basement going in, and one source coming out and that goes to a wall switch. If I want to connect a second wire to come from that ...
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887 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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1answer
113 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 ...
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2answers
46 views

3-inch recessed lighting junction access

I am looking to install 3-inch recessed lighting in room under living areas. I have the ceiling down so I am using a new-work kit with rails and a pan. The lights are sold as remodeling and the rest ...
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1answer
307 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 ...
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2answers
939 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 ...
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2answers
216 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 ...
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2answers
381 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 ...
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1answer
75 views

Does this j-box follow NEC electrical code?

I'm considering buying the following product for a security floodlight install: Arlington 8141-1 Vertical Siding Lamp Mounting Kit with Built-in Box for 1/2 Inch Vertical Siding LAP. It seems to get ...
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1answer
49 views

Is there any easy way to mount multiple single gang low voltage panels in a multi-gang box?

So, a combination of AT&T, Comcast, and the previous owner of my house and made an absolute mess out of the area I'm wanting to use as the network hub of my house. There are five outlets, one for ...
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78 views

Replacing Old Ceiling Fan With New One and No Visible Ground Wire From Junction Box

I am replacing the ceiling fan in my bedroom. Coming out of the junction box are two sets of wires. Each set has one wire coming out of opposite ends of the junction box. I connected the blue and ...
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2answers
298 views

Is it possible to convert an octagonal electrical box so that it can house 2 Duplex outlets without changing the shape of the box?

I currently have 1 Duplex outlet installed in an octagonal box mounted on the ceiling. I need to add another outlet to make it a 2 gang. However, I can't find a cover that will hold a 2 gang outlet ...
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1answer
515 views

Ground wire is hot, drop ceiling carrying current?

I am no electrician by any means but I have ran thousands of feet of wire, hooked up receptacles, lights, hot water heaters, breakers, etc... the average things with never an issue. I ran some new ...
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1answer
284 views

What is this electrical junction box? (re: adding 3-way switch)

I'm trying to replace an existing switch (at the top of the basement stairs) with a 3-way switch by adding an additional switch at the bottom of the basement stairs. The existing switch box has 4 ...
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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.
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Can I put the junction box for an exterior wall fixture inside my garage?

I have an exterior, wall-mounted light fixture that I want to attach to my new garage. It looks like this: Here's a PVC board the contractor left to mount it. There appears to be OSB sheathing ...
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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 (...
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66 views

Electrical Boxes

I have one line coming from an outlet and need to branch it to two lines. Can i use a standard electrical box (blue PVC) as a junction box to branch an electrical line?
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386 views

How can I secure wire fished between two plastic switch boxes?

I have two light switches in two separate plastic switch boxes. The upper box controls the motor of a fan, and the bottom switch controls some outlets. I want to change the wiring so that the bottom ...
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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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3answers
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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 4"...
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Do I need a junction box for a hardwired stove?

I'm replacing my drop-in electric stove with a free-standing electric stove (both are rangetop + oven). The drop-in stove was hardwired and the wiring comes up out of a hole in the floor about 3" from ...
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1answer
229 views

Which wires do I connect to my new ceiling fan?

I looked all over the internet and my outlet box seems to have unorthodox wiring/ colors. On the ceiling outlet box I have 3 thick wires, red, white and green, and a fourth single little wire that ...
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3answers
26k 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, ...
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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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2answers
477 views

How should I connect a grounding wire from a device to this box?

I'm replacing this simple 2-connector light switch with a 4-wire dimmer. The 2 new wires present on the dimmer are neutral and ground, and only neutral has an obvious home. The box has no visible ...
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408 views

Can an electrical junction box be closed and covered if not needed?

Can an octagon fixture box that was also found to be a junction box, be closed and covered over in the ceiling after remodeling. Box not needed.
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532 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 ...
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1answer
272 views

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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2answers
8k 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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1answer
46 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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1answer
363 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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1answer
2k 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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2answers
824 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'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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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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1answer
387 views

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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1answer
647 views

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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203 views

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 ...