How to Install a Low Voltage Electrical Wall Box


Enclosing your electrical connections in a junction box protects your home from a fire in the event the connection fails, and the electrical code requires a box at every 120- or 240-volt connection. Connections for wires carrying less than 30 volts don't have the same potential to create fires, however, so the main purpose of a 12-volt wall box is to support the cover plate. It isn't really a box at all, but a bracket that you anchor to the drywall. You can use it for phone, cable TV and speaker wires as well as for wires for 12-volt lighting fixtures.

Things You'll Need

  • Torpedo level
  • Ruler
  • Drywall saw
  • Screwdriver
  • Place the front of the bracket against the drywall at the installation location. Set a torpedo level on the top edge and adjust the box to center the bubble. Poke a pencil through the reference hole near each of the corners and make a mark on the wall. Remove the bracket.

  • Draw lines between the marks to form a rectangle, using a ruler and a pencil. Double-check the level of the top and bottom lines. If they aren't level, the cover plate for the box will be askew.

  • Cut around the rectangle, using a drywall saw. Remove the cutout.

  • Fit the bracket into the hole and turn the screws in front clockwise, using a screwdriver. The mounting brackets will automatically align against the back of the drywall as you do this, and tightening the the screw will secure the bracket.

Tips & Warnings

  • The bracket doesn't have a back, so you can run the wires through it after you've installed it. Like a conventional electrical box, it has holes at the top and bottom for the screws for the cover plate.
  • Use a stud finder to locate the studs before you outline the bracket on the wall. You can't install it in front of a stud.


  • Photo Credit Jupiterimages/Creatas/Getty Images
Promoted By Zergnet


Related Searches

Read Article

Make an Ikea Lack Table Look Expensive With This Cheap Hack

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!