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Drywall Mount Electrical Box Installation Tips
Drywall mount electrical boxes in the US should be covered with a matched electrical box if they cannot otherwise be covered, according to ezboxpro.com.
Installing Outlet Boxes in Drywall US - EzBoxPro
For instructions on how to install a junction box or outlet box in drywall in the US, contact EzBoxPro. This page offers the steps needed for proper installation.