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These are all various sorts of electrical containers (except the feed box, of course). The location plus kind of wiring you're doing may determine which kind of box to employ. The feed box are selected after the job is done. Before we get into specific types of containers, let's discuss certain issues that are appropriate for all types of electrical containers. *All electrical connections need to be contained inside the box. The box shields the building material plus other flammable contents in the event of electrical sparks. *All containers need to be accessible. Never cover a box with drywall, paneling or additional wall treatments. *If the junction box holds merely spliced wires with no device, including a switch, it should be covered with a bare cover plate. *An electrical box could be installed with all the front edge flush with all the completed surface of the wall or ceiling. If the space involving the completed surface plus the edge of the box is betterthan 1/8", then the box extender could be installed. *Make sure a box is deep enough to avoid crowding the wires. It need to be deep enough so a switch or receptacle can be installed quickly without crimping or damaging the wires. Electrical codes figure out how countless wires of how big each size of box can accommodate based on the cubic-inch capacity of the box. Case in point, a #14 cable occupies 2 cubic inches plus a #12 cable occupies 2.25 cubic inches. When counting wires, count the fitting or device as one cable. It's always safe to utilize a large box if you do not don't have space in the wall or ceiling. Electrical containers come in various contents plus different forms. By familiarizing oneself with all the various sorts of containers, you'll be able to select the best box for a house wiring project. MATERIALS Indoor containers are either plastic or metal. Plastic: *Plastic electrical containers are the many widely used containers for interior domestic wiring. They're inexpensive plus simple to install. But, since you can not ground a plastic box, so certain nearby codes never allow them or they are merely permitted with certainty uses. Check with your nearby building section before with a plastic box. *Some plastic containers have gaps w/knockout dividers. These containers are deprived of incorporated clamps so the wire is not held in place by the box. You need to use wire clamps plus staple the wire within 8 inches of the box should you employ this sort of box. *Plastic containers are much easier to damage than metal containers, so buy additional containers just in case. Never install a cracked box. *Most are brittle; don't employ them where they are not built into the wall. The exception is an outside box manufactured additional sturdy PVC. *Don't employ with thick light appliances plus fans. Many plastic containers include nails for anchoring the box to theframing information. Metal: *Metal electrical containers are stronger plus provide better ground connection than plastic containers. *Metal containers need to be grounded to the circuit foundation program. Connect the circuit foundation wires to the box with a pigtailed green cable plus cable nut, or with a foundation video. *The wire entering a metal box need to be clamped. *"Gangable" containers can be dismantled plus ganged together to create space for two or even more equipment. Remodel: *These are often called old-work or break containers. *Remodel electrical containers are employed when running wire to set up fresh equipment into a vintage wall. *Plastic upgrade containers have "wings" plus metal upgrade containers have expandable clips or bendable ears that hold them in the wall. Outdoor containers are molded plastic or cast aluminum. Molded Plastic: *These containers are employed withPVC conduit in outside wiring plus exposed interior wiring. Cast Aluminum: *These will be required for outside appliances associated with metal conduit. *They have sealed seams plus threaded opportunities to keep wetness out. SHAPES Rectangular (2"X3") Trade Name "One-Gang": *These containers are employed for switches plus receptacles. *One-gang containers can have detachable sides that allow them to be ganged together to form two-gang containers. Square (4"X4") Trade Name "Four-Square": *"Plaster Rings" are employed as plugs to support the following configurations: One-Gang, Two-Gang, Three-Inch or Four-Inch Round. *When a square box can be used merely for splicing cables, it is actually called the junction box plus a bare cover plate need to be selected. Octagonal Trade Name "Three-0": *These contain cable connections for ceiling appliances. *Some octagonal electrical containers have extendable brackets that may fit any joist rate plus are nailed or screwed to the framing information. While selecting the best electrical box for a project may help to guarantee the lucrative completion of your wiring project, always regard electricity plus follow protection safeguards. Never work on live circuits. Before work commences, the circuit could be diagnosed plus switched off at the panel, marking it to let others know that really work has been completed on that circuit. Confirm that the electricity is off with a voltage tester. Electrical work could merely be done by way of a confident, experienced individual or by way of a accredited electrical contractor.
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