Speed wire terminations are primarily used with which grade of wiring devices?

Speed wire terminations are primarily used with residential wiring devices. This method allows for quick and efficient wiring connections, which is particularly beneficial in residential settings where installers often seek to complete installations rapidly. In residential applications, the demand for speed and ease of installation is high, and speed wire terminations facilitate this by providing a simplified process for connecting wires to devices like outlets and switches.

While speed wire terminations could technically be used in other settings, residential applications predominantly benefit from these terminations due to the volume of installations and the need for efficiency. The other grades, such as commercial or industrial, typically involve more robust wiring methods and standards that prioritize durability and safety in demanding environments, which may not align with the convenience-focused design of speed wire terminations.