These are all several types of electrical boxes (except the lunch box, needless to say). The location and kind of wiring you’re doing will determine which kind of box to use. The lunch box is going to be used right after the job is performed. Before we get into specific types of boxes, let’s review some things that are applicable to all kinds of electrical boxes.

*All electrical connections has to be contained inside Plastic Waterproof Box. The box shields the building material as well as other flammable materials in the case of electrical sparks.

*All boxes should be accessible. Never cover a box with drywall, paneling or any other wall coverings.

*If the electrical junction box holds only spliced wires and no device, such as a switch, it should be engrossed in a blank cover plate.

*An electrical box needs to be installed with all the front edge flush with the finished top of the wall or ceiling. If the space between the finished surface and the fringe of the box is in excess of 1/8″, then this box extender should be installed.

*Make sure your box is deep enough to prevent 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 what size each scale of box can accommodate based on the cubic-inch capacity from 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 you wire. It’s always safe for use a sizable box unless you don’t have room in the wall or ceiling.

Electrical boxes come in different materials and other shapes. By familiarizing yourself using the various kinds of boxes, you’ll be able to select the correct box for your home wiring project.


Indoor boxes are often either plastic or metal.


*Plastic electrical boxes would be the most generally used boxes for indoor residential wiring. They’re inexpensive and easy to put in. 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 so the cable is not held in place from the box. You have to use cable clamps and staple the cable within 8 inches in the box if you use this type of box.

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

*Most are brittle; don’t make use of them where they are not included in the wall. The exception is definitely 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 for the framing material.


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

*Metal boxes must be grounded for the circuit grounding system. Connect the circuit grounding wires towards the box having 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 two or more devices.


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

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

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

Outdoor boxes are generally molded plastic or cast aluminum.

Molded Plastic:

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

Cast Aluminum:

*They are necessary for outdoor fixtures connected with metal conduit.

*They have got sealed seams and threaded openings to maintain moisture out.


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

*These boxes can be used for switches and receptacles.

*One-gang boxes may have detachable sides that allow 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 only for splicing cables, it is called an electrical junction box along with a blank cover plate should be used.

Octagonal Trade Name “Three-“:

*These contain wire connections for ceiling fixtures.

*Some octagonal electrical boxes have extendable braces which will fit any joist spacing and are nailed or screwed to the framing material.

While deciding on the Aluminium Box for the project will assist you to ensure the successful completing your wiring project, always respect electricity and follow safety precautions. Never work on live circuits. Before tipyyy begins, the circuit ought to be identified and turned off at the panel, tagging it to let others know that work will be done on that circuit. Confirm that this power is with a voltage tester. Electrical work should just be performed by a good, experienced person or with a licensed electrical contractor.