They are generally 2 x 3 inches in size, with depths ranging from 1 1/2 inches to 3 1/2 inches. Some forms are "gangable"—with detachable sides that can be removed so the boxes can be linked together to form larger boxes for holding two, three, or more devices side-by-side.What is an old work outlet box?
An old work box is an electrical box for light switches, outlets, and other devices that are installed after drywall has been installed on the wall studs. The term old work (sometimes old construction or retrofit) refers to walls that are already covered up, making it impossible to access the studs.What is an electrical outlet box?
Definition of outlet box. : a terminal box for electric wiring or fittings at which the wires terminate for connection to electric fixtures or appliances.