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Questions tagged [junction-box]

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

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50 views

Is my 2-gang switch box over-full with 5 cables?

I am installing a dimmer, and I thought there were a lot of wires in this box. It looks like there are 5 cables into a 2-gang box. I tried to draw a little diagram and attach a photo to make it ...
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22 views

How to attach a doorbell transformer to a plastic junction box?

My son's doorbell isn't working, I'm not getting any voltage, and I traced the wiring to the transformer located in the basement behind a finished ceiling used for a light fixture. I would like to ...
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1answer
166 views

Counting Smoke Detector Wires In Junction Box

I want to connect a wire to get power for for a ceiling fan to an existing junction box in the attic that is used right now only for a smoke detector. Box currently has a 12-3 wire coming in, and the ...
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115 views

Garage wiring puzzle

I'm trying to figure out the wiring in my finished garage. It has two ceiling junction boxes, with attached porcelain lights, and three wall outlets. I'll say up front that all of this was done ...
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1answer
129 views

What is the best way to handle house wiring cables with short sheathing?

I'm replacing a couple switches in a bathroom with smart switches and ran into a problem. The previous owner redid the bathroom and the switch box in question had 5 Romex cables (four 12/2, one 12/3) ...
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1answer
93 views

Grounding metal electrical boxes

I would like confirmation on the following: Is any metal box automatically grounded if it is supplied by an armored cable (without a ground wire) that is properly connected to the box and back to the ...
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1answer
70 views

safely de-energizing a junction box so that I can permanently cover it up

I have a junction box in my ceiling that is controlled by a single light switch. I no longer want to use the junction box or have it exposed and I'd like to cover with drywall-- much preferable to a ...
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3answers
9k views

Junction box with screws 2 3/4“ apart, but fixture needs 3 1/2”

I recently bought a new fixture for my back patio light. (Just replacing an old halogen motion-detector light with a new LED motion-detector light.) Unfortunately, the mounting bracket for the new ...
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1answer
41 views

Will this ceiling fan box replacement work in old work hole?

I have had a hanging light fixture in the middle of the living room which I now want to replace with a ceiling fan+light. Nothing huge and fancy... but a hunter nonetheless. The old pan box was, old (...
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2answers
7k 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.
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7answers
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Outlet screwed directly into stud

I was replacing old outlet in my house and came across an outlet that is screwed directly into the studs. Also the stud and the junction box were cut to fit the outlet. The new outlet is too big to ...
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1answer
56 views

Separating 12-3 wire from panel to feed a bathroom fan and light

I am replacing an existing heater, light, night light, exhaust fan unit with a new unit that only contains a light and exhaust fan. The existing wiring has a 12-3 coming straight from the panel with ...
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2answers
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Vanity light installation using an old work box

I have a vanity light that weighs 5.6 lbs. The old work box I have is rated for 6 lbs. This seems very close to me. Is there something else I should be using?
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Replacing ceiling fan bracket

I'm replacing an old ceiling fan. The old one wobbled a lot even after tightening the blades and trying to balance it. Right now the electrical box is just a plastic one that appears to be screwed ...
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1answer
68 views

Can you mount a plastic junction box to metal studs?

Inspired by this answer Forget about plastic boxes, they are a wild misfit. They are generally kitted up to nail to wood joists. Can't nail to a steel joist. For a standard "new work" box, I ...
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3answers
851 views

How to Use GFCI Square Cover?

I have a 4" square box which I'm going to put a GFCI outlet in. I got one of the raised covers with a rectangular cutout for GFCIs. However, the outlet itself doesn't sit flush with the cover. When ...
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1answer
47 views

How can I install an exterior porch light where there is no junction box?

I live in an older house with small, exterior porch light fixtures outside 3 doors. Those fixtures need to be replaced. When I pulled the first one off, I found 2 wires coming thru the wall - no ...
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5answers
126 views

Using non-metallic cable with this metal box having armored cable attached?

I'm planning to using this existing outlet to add an additional outlet for a TV directly above. The kit I purchased has a plastic old work receptacle box. Can I use building wire (Romex) into this ...
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2answers
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Can I install NM cable, junction boxes on attic rafters

I'm replacing knob-and-tube wiring, and plan to add blown-in attic insulation afterward. I figure it would be safer to run NM wire on the underside of the attic rafters than to bury it in insulation, ...
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380 views

Can I use a light fixture box as a junction box for a Baseboard

I would like to know if it's allowed to use an octagonal box currently used for a light as a junction box for two baseboard heater ( I need to relocate the current line). The reason we need to ...
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3answers
133 views

Adding new 240v 30 amp outlet by tapping into existing NEMA 10-30 outlet box

Here's the situation: House was built in the 1980s. My laundry room has an existing NEMA 10-30 outlet that is not being used since we have a gas dryer. I am thinking about getting an electric car so I'...
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1answer
83 views

Flush Mounted PVC Electrical Junction Box or alternative ideas to supply two sub-panels

I'm not an electrician, but I am a pretty aggressive DIYer that wants to do things the right way (i.e. I plan on getting a permit and everything inspected but I need a gameplan first). I have a ...
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675 views

Handybox Extension

Can you stack a handybox with an extension outside of the drywall? This puts the total box size at just shy for 4". I know handyboxes can be used with conduit, but can they be double-stacked in a ...
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2answers
653 views

How to wire up a 240 V oven?

I recently purchased a Whirlpool WOS51ES4ES electric oven from Home Depot with the intention of installing it myself. Our old oven is gas, so I need to run a new 240 circuit. The oven draws 20A. I ...
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Are “terminal block” style junction boxes allowed in the US?

In the UK it seems pretty common to see junction boxes with built-in screw terminals that are used only for splicing wires from 2 or more cables together. Typical example: (source) Sample wiring ...
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1answer
3k 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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4answers
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Are these pigtails inside the panel and outside a junction box allowed?

I am concerned about a newer electrical panel's installation, where one of the older load wires, at the main electrical panel, appear to be shorter in length, appear not reaching the desired circuit ...
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1answer
274 views

Run conduit from exterior sconce

We have a sconce on the outside of our brick house on a covered patio currently. I would like to run conduit from it to allow us to place an exterior fan on the same covered porch. My questions: 1) ...
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1answer
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Any issue with GFCI outlet touching sides of outlet extender?

I have to extend a single gang outlet box to account for added depth from beadboard wainscoting. The box is PVC and so is the outlet extender. The problem is, the outlet is a GFCI and it is very snug ...
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1k views

Can I wire this light fixture set with the plate mounted directly to the stud?

I'm not an electrician. Light fixture has terrible installation instructions. I bought two. I pig-tailed one. I used 14-2 Type UF for the pig-tail because I didn't have 2' of Romex at the time. In ...
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1answer
21 views

What size junction box do I need for a wall mount with a 3.5 inch base?

I have some wall sconces that have a 3.5 inch round base; will a 3.5 inch round junction box work or do I need one that is smaller, like 3-inches? Do they even make those?
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Low Voltage between Neutral and Ground wires in Dishwasher Junction Box

My Bosch 800 series Dishwasher will not function. I plan on swapping the control module. In the junction box, at the terminals, I'm reading 120V between Hot and Ground, and between Hot and Neutral. ...
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4answers
1k views

Is a grommet needed for romex into this metal junction box?

I bought a 6-pack of these LED downlights. The metal junction box has knockout holes to run my 14-2 (with ground) wire. I was surprised that the J-box didn't come with grommets after knocking out the ...
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1answer
79 views

How can I rerun cables along stairs where a wall is being removed?

I want to partially take down the wall that currently serves as my staircase handrail. I will replace that portion of the wall with a cable rail. . The picture above was taken while the house was ...
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2answers
1k views

Need help wiring two lights from a switch at the end

I am trying to wire two lights in my shed with a switch at the end of the circuit. Power comes from a subpanel on the back of my house and is connected to a GFI outlet. Power then goes underground ...
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1answer
76 views

How do I add a receptacle outside off the porch light

I put in a gazebo in the back of the house and I want to install a receptacle from the only electrical source which is a porch light. I could just run some wire thru the base of the light and run it ...
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171 views

Adding wires to EMT conduit to add circuits

unfortunately, the kitchen wiring in our new condo is severely outdated. Just two circuits; one 15amp for lights and one 20amp for fridge, microwave, gas stove and oven, garbage disposal, dishwasher ...
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2answers
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Light junction box cover does not conceal the box opening

I recently replaced a hallway ceiling light with a pendant, only to find that the supplied canopy was smaller (5") than the hole previously cut in the ceiling (6"). I'm hoping someone has encountered ...
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2answers
5k views

How can I add a recepticle to this junction box full of push splices?

This is a picture of the junction box with all the wires. I've just never seen a junction box with this many wires. I'm brand new at DIYing electrical stuff but I'm fixing my attic up into a bedroom ...
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2answers
4k views

How do I convert a service panel to a junction box?

I'd like to convert my existing 100-A panelboard to a junction box (a new 200-A panelboard is being installed about 15' from the existing panel). My naive question: are there any particular rules to ...
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1answer
91 views

How to remove old pancake junction box (metal brace, lathe and plaster cieling)

I'm trying to upgrade my ceiling electrical boxes for ceiling fans. The house is from 1935 and lord knows when the electrical work is from, but it's old. Got up in the attic to get the old box out ...
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1answer
178 views

Mounting an electrical box to screws drilled into the ceiling

A plastic box junction box shall be mounted to a drywall industrial ceiling with two screws. The box will be filled with many low voltage wires before it is brought to the worksite (making it very ...
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3answers
66k 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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5answers
2k views

Ceiling fan electrical box missing female screw holes

I have an existing electrical box that appears to support ceiling fan installation but it is missing the 2 female screw holes I'm used to finding in these boxes. Is there some sort of intermediate ...
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3answers
4k views

How can I install an electrical plug without a stud nearby?

I need to place an electrical outlet where there is no stud. Where can I find outlets to do this?
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1answer
286 views

How can I mount a light to a square junction box?

In my entryway, there is a lighting fixture box that is sticking out of the ceiling drywall. (See attached image below) The box is 4 inch by 4 inch. I assume that it came with some kind of ceiling ...
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1answer
81 views

Does a cover exist for a 3.5 inch round electrical box?

I have a 3.5 inch round electrical box in the garage that is being used as a junction box. The inspector says that it has to be covered. However, I am unable to find a 3.5 inch pvc cover for this box. ...
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1answer
103 views

How to move a junction box?

Hi i want to move a junction box that's behind my back splash into a cabinet but so i should be able to access it as needed according to the code but the wires from the top and bottom are exact so i ...
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4answers
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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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I opened a light switch and found an unterminated wire in the junction box. Is this unsafe?

I switched of the main circuit breaker to the house and opened up a light switch to see if I had a neutral wire, so I could buy a smart switch. But when I took off the plate I found what appears to ...