Eccentric knockouts are holes cut into an electrical box that are larger in diameter than the inner diameter of the device being installed, such as when an oversized wiring device or conduit fitting is being used. Allowing for larger frames and deeper boxes, these knockouts give installers a lot more room to work when it comes to fitting bulky components into tight spaces. They can also make wiring much easier if an appliance or conduit fitting requires a bigger hole in the box