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How to Make an Electrical Junction Box



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An electrical junction box is one of the most important installations that you can set up in your home or business establishment for safety reasons. It is a box that houses all the main electrical wirings, providing an avenue for the wires to be distributed to other areas of the house or the building in an orderly manner. But how exactly are they made?

If you have been curious to know more about how electrical boxes are made and how they function, then stick around as we are going to explore the construction process, the materials used, and how each type is used.


Installation Materials
Source: Spruce

To start off with the process, you have to assemble the materials needed to make the electrical junction box. To start off, you will need to collect the following items, which can be found in any electrical shop in your locality.


Setting up an electrical box is something that anyone who understands the basics of electricity. Once you have collected all the necessary materials mentioned above, use the following detailed steps to set up your electrical box that will be working within no time.

Step 1: Shut off the Main Power

Main Power
Source: Spruce

When dealing with any electrical installation, the first thing you have to do is to switch off the main power. This is for safety reasons as the last thing you would want is to get electrocuted while trying to set up your improvised electrical box.

This can be done from the main switch that can be found in the house. If you can’t locate it then find then get in touch with your contractor for further help. It may cost you some money in return but it is always a good idea to use the services of an expert if you are unsure of what to do when dealing with electricity.

Step 2: Set the Box Up

Setting up the Box
Source: Spruce

Depending on the type of box you are using, begin setting the box up for the installation of the electrical box. Check the box for all the necessary hoes that the wires will go through. Most usually come with the holes covered with thin flaps that can be knocked off. Once you have ascertained that the box has all the parts intact, it is now time to set the thing up.

Step 3: Mount the Box

Junction Box Installation
Source: Spruce

Find a good spot for the box that is along the main power line. This can be indoors or outdoors. Once you have located the spot, start screwing the box into the wall until you are sure that it is holding securely. Before screwing things in, make sure that the wires you intend to use are passing through the designated holes into the electrical box for the installation that follows later on.

Step 4: Set the Clamps

Source: Spruce

With the box in place, start arranging the writing neatly inside the box, ensuring that each one is well separated from each other. All wires are usually insulated, but it does help to have a separation of the wires all for the sake of safety and for neatness. Some boxes, especially metallic ones, come with their own clamps, but if they don’t have them, you can insert them yourself and secure everything in place.

Step 5: Secure the Cables

Securing the Wires
Source: Spruce

The wires and cables that are fed through the holes in the box have to be secured in place too. Leaving them hanging around is what makes the box too crowded, and this increases the chances of short-circuiting in case the wires come naked at some point. Secure all the wires using the clamps against the walls. Just ensure you exercise caution when tightening to avoid any damage to the cables.

Step 6: Join the Wires

Cover the Wires
Source: Spruce

With all the wires in place, it is now time to join up the naked ends with the main power lines. This should be done once all the cables are well arranged and secured. Begin with the ground wires first; these usually come in the form of green insulations. Next up, join the neutral wires; they usually come in white and finally join the black ones. Ensure that each connection is held securely with a connector and well covered to avoid any aked wires from coming into contact with each other. This is important as it is the only way to avoid starting fires inside the electrical box once the main power is switched on.

Step 7: Finish It Off

A Closed Box
Source: https://sc04.alicdn.com

With all the wires connected and well covered, it is time to fold everything into the box neatly. This can be done by using adhesive tapes or screws. There are electrical codes that one has to follow when doing this; therefore, ensure that you are familiar with most of them to understand how to get this done properly. Once you are satisfied with everything and how it looks, close the box up nicely and switch back the main power back on.


In every electrical installation, an electrical box is a very important tool that ensures safety and convenience when it comes to wiring. There are many types of boxes that you can use, and each is designed for specific conditions. The most common are made of metal and plastics. Take your time when selecting the right box to find the one that suits your needs perfectly. For more information on electrical boxes and their installations, check out our website and have all your questions answered.

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