These are all several types of electrical boxes (except the lunch box, obviously). The location and type of wiring you are doing determines which type of box to utilize. The lunch box will likely be used following the job is done. Before we get into specific types of boxes, let’s go over some things that are applicable to all types of electrical boxes.

*All electrical connections must be contained inside Safety Protecting Case. The box shields the property 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 some other wall coverings.

*If an electrical junction box holds only spliced wires and no device, like a switch, it should be covered with a blank cover plate.

*An electrical box should be installed using the front edge flush using the finished top of the wall or ceiling. In the event the space between the finished surface and the fringe of the box is more than 1/8″, then a box extender should be installed.

*Ensure 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 the things size each dimensions of box can accommodate based on the cubic-inch capacity from the box. For example, a #14 wire occupies 2 cubic inches as well as a #12 wire occupies 2.25 cubic inches. When counting wires, count the fixture or device as you wire. It’s always safe to use a big box until you don’t have room inside the wall or ceiling.

Electrical boxes come in different materials and other shapes. By familiarizing yourself with the various kinds of boxes, you’ll be able to select the correct box for your residence 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 put in. However, because you cannot ground a plastic box, so some local codes do not allow them or they may be only allowed for certain uses. Check along with your local building department before using Mould Box.

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

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

*Most are brittle; don’t use them where they are not built into the wall. The exception is an outdoor box made 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 should be grounded towards the circuit grounding system. Connect the circuit grounding wires to the box with a pigtailed green wire and wire nut, or with a grounding clip.

*The cable entering metallic box has to be clamped.

*”Gangable” boxes can be dismantled and ganged together to help make space for two or more devices.


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

*Remodel electrical boxes are utilized when running cable to set up new devices into a classic wall.

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

Outdoor boxes are usually molded plastic or cast aluminum.

Molded Plastic:

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

Cast Aluminum:

*These are generally necessary for outdoor fixtures connected with metal conduit.

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


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

*These boxes can be used as switches and receptacles.

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

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

*”Plaster Rings” are used as adapters to allow for these configurations: One-Gang, Two-Gang, Three-Inch or Four-Inch Round.

*Whenever a square box is used 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 will fit any joist spacing and they are nailed or screwed to the framing material.

While deciding on the Aluminium Box for the 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 ought to be identified and turned off on the panel, tagging it to let others know that work has been done on that circuit. Confirm that this power is with a voltage tester. Electrical work should only be performed by a confident, experienced person or by way of a licensed electrical contractor.

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