Electrical Boxes: How to Add Capacity
Updated: Dec. 19, 2017Two ways to solve this common remodeling problem
If you're adding wires or a bigger device to an electrical box, you may need additional capacity. There are two ways to enlarge an existing box without tearing the wall open.
Make room for a new device
Although your current electrical “box fill” may meet code, it’s not safe to jam a new device in if the box is already full of wires. You have two options: Add a plastic surface-mount extender box (like Leviton No. 6197-W; available through our affiliation with amazon.com; Photo 1), or remove the old 12.5-cu.-in. box and replace it with a flush-mount 20-cu.-in. box that’s 7/8 in. deeper (Photo 2).
Required Tools for this Project
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
- 4-in-1 screwdriver
- Cordless drill
- Drywall saw
- Electrical tape
- Hacksaw
Required Materials for this Project
Avoid Avoid last-minute shopping trips by having all your materials ready ahead of time. Here’s a list.
- Deep remodeling box
- Extender box
Originally Published: June 20, 2017
