Terminal Screws Backed out and staked, more info
Terminal Screws Backed out and staked, more info
Backed-Out and Staked regarding Electrical Screw Terminals (usually found on a switch or receptacle).
Staked screws have the last 2 or 3 threads slightly deformed during the manufacturing process.
The intent is to prevent the Terminal Screw from being accidently removed from the device. Staked (held in place) in a Backed-Out condition (to remove the screw from the device would require a significant amount of force; once removed it is extremely difficult to re-insert the screw).
Backed-Out is when Terminal has been run out to its maximum (without being removed from the device) and is ready to receive the conductor.
The purpose for Backed-Out is to facilitate the ease and speed (think, Time is Money) to complete the conductor termination on the device.