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These are all various kinds of electrical boxes (except the lunch box, obviously). The location and type of wiring you are doing will determine what sort of box to use. The lunch box will likely be used after the job is carried out. Before we get into specific varieties of boxes, let’s go over some things that are applicable to all types of electrical boxes.

*All electrical connections should be contained inside Mould Box. The box shields the property material as well as other flammable materials in the case of electrical sparks.

*All boxes has to be accessible. Never cover a box with drywall, paneling or some other wall coverings.

*If an electrical junction box holds only spliced wires without any device, such as a switch, it needs to be engrossed in a blank cover plate.

*An electrical box needs to be installed with the front edge flush with the finished surface of the wall or ceiling. In the event the space involving the finished surface as well as the edge of the box is greater than 1/8″, then this box extender should be installed.

*Ensure your box is deep enough in order to avoid crowding the wires. It must be deep enough so a switch or receptacle can be installed easily without crimping or damaging the wires. Electrical codes figure out how many wires of the things size each size of box can accommodate based on the cubic-inch capacity of the box. As an example, a #14 wire occupies 2 cubic inches and a #12 wire occupies 2.25 cubic inches. When counting wires, count the fixture or device as one wire. It’s always safe to use a big box unless you don’t have room in the wall or ceiling.

Electrical boxes are available in different materials and different shapes. By familiarizing yourself with all the various kinds of boxes, you’ll be able to choose the correct box for your home wiring project.


Indoor boxes are generally either plastic or metal.


*Plastic electrical boxes would be the most generally used boxes for indoor residential wiring. They’re inexpensive and simple to install. However, as you cannot ground a plastic box, so some local codes do not let them or they may be only allowed for certain uses. Check along with your local building department before using Aluminium Alloy Junction Box.

*Some plastic boxes have holes w/knockout tabs. These boxes do not possess built in clamps therefore the cable is not held in place from the box. You must use cable clamps and staple the cable within 8 inches from the box if you are using this type of box.

*Plastic boxes are simpler to damage than metal boxes, so buy extra boxes just in case. Never use a cracked box.

*Nearly all are brittle; don’t use them where they are not built into the wall. The exception is an outdoor box manufactured from extra strong PVC.

*Don’t use with heavy light fixtures and fans. Some plastic boxes include nails for anchoring the box towards the framing material.


*Metal electrical boxes are stronger and supply better ground connection than plastic boxes.

*Metal boxes should be grounded for the circuit grounding system. Connect the circuit grounding wires for the box with a pigtailed green wire and wire nut, or having a grounding clip.

*The cable entering a metal box must be clamped.

*”Gangable” boxes can be dismantled and ganged together to make space for several devices.


*These are generally sometimes called old-work or cut-in boxes.

*Remodel electrical boxes are used when running cable to put in new devices into an older wall.

*Plastic remodel boxes have “wings” and metal remodel boxes have expandable clips or bendable ears that hold them within the wall.

Outdoor boxes are often molded plastic or cast aluminum.

Molded Plastic:

*These boxes are employed with PVC conduit in outdoor wiring and exposed indoor wiring.

Cast Aluminum:

*These are needed for outdoor fixtures connected with metal conduit.

*They may have sealed seams and threaded openings to keep moisture out.


Rectangular (2″X3″) Trade Name “One-Gang”:

*These boxes are used for switches and receptacles.

*One-gang boxes may have detachable sides that permit them to be ganged together to make two-gang boxes.

Square (4″X4″) Trade Name “Four-Square”:

*”Plaster Rings” are used as adapters to support the following configurations: One-Gang, Two-Gang, Three-Inch or Four-Inch Round.

*Whenever a square box is utilized just for splicing cables, it is actually called an electrical junction box as well as a blank cover plate must be used.

Octagonal Trade Name “Three-“:

*These contain wire connections for ceiling fixtures.

*Some octagonal electrical boxes have extendable braces that can fit any joist spacing and they are nailed or screwed for the framing material.

While deciding on the Plastic Waterproof Box for your project will help to make sure the successful finishing of your wiring project, always respect electricity and follow safety precautions. Never work on live circuits. Before tipyyy begins, the circuit should be identified and switched off in the panel, tagging it to let others know that work will be done on that circuit. Confirm the power is off with a voltage tester. Electrical work should simply be performed by a confident, experienced person or with a licensed electrical contractor.

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