Go Back  DoItYourself.com Community Forums > Electrical, AC & DC. Electronic Equipment and Computers > Electrical - AC & DC
Reload this Page >

Box Fill Question - 3 14/2s and a Receptacle in a 18.5 Box

Box Fill Question - 3 14/2s and a Receptacle in a 18.5 Box

Old 11-08-20, 09:54 AM
Thread Starter
Join Date: Jun 2015
Posts: 362
Received 0 Votes on 0 Posts
Box Fill Question - 3 14/2s and a Receptacle in a 18.5 Box

I need to replace a box, and Im not sure about the box full calculation. There are three 14/2 wires and one receptacle. The box previously had 2 - 14/2s, but I tapped it for another device. I would normally use an old work box, but the drywall is a bit overcut. Im planning to use a Madison box with the internal screws and secure it directly to the stud. The box I have is 18.5. They make one in 22.5, but Id have to order it. I could also use a 2-gang instead, but I dont have one. I was kind of hoping to get this done today, but I will wait if the box is too small. I wish Home Depot or Lowes carried these.
Old 11-08-20, 10:48 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 70,045
Received 2,949 Votes on 2,662 Posts
Both Home Depot and Lowes carry the Madison MSB22+ smart box.
My local Depot says out of stock. Lowes has it.

6 x #14 wires = 6
1 grounds = 1
1 device = 2
6 + 1 + 2 = 9 x 2 = 18 cu in.
Old 11-09-20, 02:36 AM
Join Date: Mar 2014
Posts: 817
Received 104 Votes on 86 Posts
Also cai24 you can take a look here. For the future if you need to know you can use this calculator to help you. Handy to have. There are a lot of box fill calculators on the Net but this will give you an idea.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: