Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [junction-box]

A junction box is a container used to enclose electrical connections (junctions). Use with the [electrical] tag. Use with [wiring] if your questions involves wires.

When you need to connect two wires together, that is called a junction. By code, all junctions must be made within a junction box. This protects the junction and contains any electrical arcing.

The most common use for a junction box is to install a or .

Reference:

http://en.wikipedia.org/wiki/Junction_box

Related Tags:

461 questions
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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.
Billy ONeal
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Remove old ceiling pancake (pan) junction box, or how to work around bolt in that box?

I'm having a difficult time removing an existing ceiling junction box/pan. There was a nut holding the bolt in the center. I thought the nut was holding the box in place, but even with the nut gone the box won't come out. There are no screws or…
Will Haley
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How many splices can a junction box contain?

Im passing 2 circuits and a ground from LB to junction for backyard outside circuits. So two neutral, two hot, and one ground 10 awg. The LB box screw fell into the vertical pvc conduit last minute, and I have a few feet of wire pulled out of LB.…
eaglei22
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How do I disconnect a garbage disposal from a junction box? What to do with loose wires?

I just removed part of our cabinet during demo and our kitchen has a hardwired garbage disposal to a junction box on the wall. I want to disconnect my disposal during demo and save it for reuse in our remodel. How do I disconnect the disposal from…
milesmeow
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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 switch controls the light on the fan. Since the…
Ed McMan
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Red wire in a junction box

I am removing/eliminating a switch and light from upstairs and traced the wire to a basement junction box. The white wire from that romex is connected to a single red wire from circuit box. If I remove the romex from the old switch, what do I do…
Bruno
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Repurpose Electrical Junction Box Knockouts Sizes

I have a metal electrical junction box with different size knockouts. Can I repurpose the larger size knockout by drilling a smaller standard hole within the same larger knockout? I need additional (small) holes than what's available per side. I…
AlwaysLearning
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Maximum number of wires allowed for junction box

Please take a look at attached pictures of my can light junction box. Outside says max 8 14 AWG conductors. It also says 10 cubic inch is J-Box volume. Inside, there are 3 push in connectors (for hot, neutral and ground), each with 4 holes. 1 of the…
user2716454
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Can I use a gutted sub panel as a junction box

I am going to be replacing my all in one 100A breaker panel with a 200A panel. The old panel has the ground/neutral bus at the bottom of the box and the wires are cut too short to reach the bus bars on the new box. The hot wires may also pose a…
C-Dog
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Junction box has screws 2 3/4" apart but fixture needs 3 1/2"

This is similar to question asked back in 2017. No good answers other than original poster said electrician figure it out. Wondering what it costs. Are we looking at replacing junction box which would entail widening the hole in ceiling? Can we slip…
Annette
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Can I put seven 12/2 cables in one 4 x 4 x 2-1/8 square metal junction box?

Can I put seven 12/2 cables in one 4 x 4 x 2-1/8 square metal junction box? According to some box fill calculators, this may be a tad too many wires for this junction box. However, I'm hoping I'm wrong. Other wise I may have to use two junction…
navig8tr
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Are these junction boxes suitable for domestic lighting?

I’m putting together some junction boxes for domestic lighting using RS own brand DIN terminals in a suitable enclosure (home automation later would favour grouping the wiring into a limited number of JBs with space to accept relays later). One…
drummer-bummer
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How to screw using the holes in this enclosure?

I have this enclosure: I wonder how I can connect some PCB (consider it as a plate where I drill holes) in to the holes from the enclosure (the 6 smaller holes in the bottom, where you can see 5 in the picture). The holes do not have any screw…
Michel Keijzers
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Makeshift Junction Box Cover

I'm about to cover up some junction boxes in my ceiling, they need a cover and I got the wrong size at the store. I have some metal flashing laying around from working on my roof would this be safe to use if I cut it to size and screw it on?
Calvin
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