Hello,
This is electrical wiring junction box information post with questions and answers. There are many types and many uses for j-boxes but choosing correct one always depends on what use is needed. The 4in. sq. metal box can be used both residential and commercial. The single-gang cut-in is the best for brick. If you have any questions register then come back to this page to ask your question using the comment section at bottom of page. Thanks
![gangable-metal-cut-in-box](/wp-content/uploads/gangable-metal-cut-in-box-131x150-Large.jpg)
single-gang metal cut-in box
![4in-metal-box](/wp-content/uploads/2014/01/4in-metal-box-150x150.jpeg)
4in sq metal box – can be used flush or surface mount.
![4in-metal-box-in-brick](/wp-content/uploads/4in-metal-box-plaster-ring-brick-Large-150x150.jpg)
Not flush mounted, plaster ring not flush with brick.
![nail-on](/wp-content/uploads/nail-on-box-150x150-Large-150x150.jpg)
Plastic-nail-on can be used in brick but not recommended.
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