OBD Shell – Check This Out..

These are all different types of electrical boxes (except the lunch box, needless to say). The location and kind of wiring you’re doing determines which type of box to utilize. The lunch box will likely be used right after the job is performed. Before we get into specific varieties of boxes, let’s review 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 and other flammable materials in case of electrical sparks.

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

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

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

*Make sure your box is deep enough to avoid crowding the wires. It ought to be deep enough so a switch or receptacle can be installed easily without crimping or damaging the wires. Electrical codes see how many wires of what size each size of box can accommodate based on the cubic-inch capacity in the box. For instance, a #14 wire occupies 2 cubic inches along with 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 within the wall or ceiling.

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


Indoor boxes are usually either plastic or metal.


*Plastic electrical boxes are definitely the most widely used boxes for indoor residential wiring. They’re inexpensive as well as simple to set up. However, since you cannot ground a plastic box, so some local codes do not let them or these are 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 will not be locked in place by the box. You need to use cable clamps and staple the cable within 8 inches in the box if you utilize this sort of box.

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

*The majority are brittle; don’t utilize them where they are not included in the wall. The exception is surely 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 provide better ground connection than plastic boxes.

*Metal boxes has to be grounded for the circuit grounding system. Connect the circuit grounding wires towards the box using a pigtailed green wire and wire nut, or using a grounding clip.

*The cable entering a metal box must be clamped.

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


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

*Remodel electrical boxes are employed when running cable to set up 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 often 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 required 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 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 allow for the following configurations: One-Gang, Two-Gang, Three-Inch or Four-Inch Round.

*When a square box is utilized simply 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 towards the framing material.

While deciding on the Aluminium Box for your project will assist you to guarantee 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 on the panel, tagging it to let others know that work has been done on that circuit. Confirm that this power is off with a voltage tester. Electrical work should simply be performed by a confident, experienced person or by way of a licensed electrical contractor.

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