Check the electrical load and ensure that the sensors do not exceed the 10 Amp maximum. Whether in a home or an industrial facility, this box keeps your electrical setup organized, functional, and efficient. However, the key to. Are there any tricks to getting everything to fit inside of a box? Ideally, I like to use these: That is a PITA, because it involves plaster work after the box is in, and it's a new-work box so you have to nail it to stud. But it gives you 105 cubic inches, for the 3-gang size with the 3/4 raised. The one on the right in the first pic can be slid to the right a bit. Trade the GFCI outlet for a GFCI breaker. Test the Circuit When devices in your new box don't work, you start by testing the circuit.