These are all different types of electrical boxes (except the lunch box, of course). The location and kind of wiring you are doing determines which kind of box to utilize. The lunch box will be used after the job is done. Before we get into specific kinds of boxes, let’s go over some things that are applicable to all types of electrical boxes.
*All electrical connections has to be contained inside Mould Box. The box shields the building material as well as other flammable materials in the event of electrical sparks.
*All boxes must be accessible. Never cover a box with drywall, paneling or any other wall coverings.
*If the electrical junction box holds only spliced wires with no device, like a switch, it should be engrossed in a blank cover plate.
*An electrical box needs to be installed using the front edge flush using the finished top of the wall or ceiling. When the space in between the finished surface as well as the fringe of the box is greater than 1/8″, then the box extender should be installed.
*Make certain 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 determine how many wires of what size each size of box can accommodate based on the cubic-inch capacity in the box. For 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 sizable box until you don’t have room within the wall or ceiling.
Electrical boxes are available in different materials and various shapes. By familiarizing yourself with all the several types of boxes, you’ll have the capacity to pick the correct box for your house wiring project.
Indoor boxes are generally either plastic or metal.
*Plastic electrical boxes are the most widely used boxes for indoor residential wiring. They’re inexpensive as well as simple to put in. However, because you cannot ground a plastic box, so some local codes do not allow them or they are only allowed for certain uses. Check 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 and 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 are using this kind of box.
*Plastic boxes are easier to damage than metal boxes, so buy extra boxes just in case. Never use a cracked box.
*Most are brittle; don’t use them where they are not included in the wall. The exception is definitely 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 towards the framing material.
*Metal electrical boxes are stronger and provide better ground connection than plastic boxes.
*Metal boxes must be grounded for the circuit grounding system. Connect the circuit grounding wires towards the box with a pigtailed green wire and wire nut, or with 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 inside the wall.
Outdoor boxes are generally molded plastic or cast aluminum.
*These boxes are employed with PVC conduit in outdoor wiring and exposed indoor wiring.
*These are generally necessary for outdoor fixtures associated with metal conduit.
*They may have sealed seams and threaded openings to maintain 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 allow them to be ganged together to form two-gang boxes.
Square (4″X4″) Trade Name “Four-Square”:
*”Plaster Rings” are used as adapters to allow for the subsequent configurations: One-Gang, Two-Gang, Three-Inch or Four-Inch Round.
*Whenever a square box is used only for splicing cables, it really is called an electrical junction box and 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 therefore are nailed or screwed towards the framing material.
While choosing the OBD Shell for the project will assist you to ensure 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 switched off in the panel, tagging it to let others know that work is being done on that circuit. Confirm that the power is off with a voltage tester. Electrical work should only be done by a good, experienced person or with a licensed electrical contractor.