Electric box types : Junction Box, Switch Box, Two-Gang Box


These are each different types of electrical boxes (except the lunch box, of course). The position and type of wiring you are doing will determine which type of box to use. Before we get into specific types of boxes, let's go over some effects that apply to all types of electrical boxes.

* All electrical connections must be contained inside an electrical box. The box securities the structure material and other ignitable accouterments in the event of electrical sparks.

* All boxes must be accessible. Noway cover a box with drywall, paneling, or other wall coverings.

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

* An electrical box should be installed with the frontal edge flush with the finished face of the wall or ceiling. However, also a box extender should be installed If the space between the finished face and the edge of the box is lesser than1/8".

* Make sure your box is deep enough to avoid crowding the cables. It must be deep enough so a switch or container can be installed fluently without releasing or damaging the cables. Electrical canons determine how numerous cables of what size each size of the box can accommodate grounded on the boxy-inch capacity of the box. For illustration, a# 14 line occupies 2 boxy elevations, and a# 12 line occupies2.25 boxy elevations. When counting cables, count the institution or device as one line. It's always safe to use a large box unless you do not have room in the wall or ceiling.

Electrical boxes come in different accouterments and different shapes. By familiarizing yourself with the different types of boxes, you will be suitable to select the correct box for your home wiring design.

MATERIALS

Inner boxes are generally either plastic or essence.

Essence

* The string entering an essence box must be clamped.

*"Gangable" boxes can be disassembled and ganged together to make space for two or further biases.

Revise

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

* Remodel electrical boxes are used when running string to install new bias into an old wall.

* Plastic remodel boxes have" bodies" and essence remodel boxes have expandable clips or bendable cognizance that hold them in the wall.

Out-of-door boxes are generally moldered plastic or cast aluminum.

Moldered Plastic

* These boxes are used with PVC conduit in out-of-door wiring and exposed inner wiring.

Cast Aluminum

* These are needed for out-of-door institutions connected with essence conduit.

* They've sealed seams and threaded openings to keep humidity out.

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