Why are wire leads used instead of screws on the GUAC1 and GUAC2 GFCI USB devices? May 16, 2024 15:17 Updated Follow It allows for the highest possible power to be provided, as well as helps manage the heat generated by the devices. Related articles Do the Leviton USB In-Wall Chargers have a breakoff tab for split power applications? Where can I install a GUAC1 or GUAC2 GFCI combination USB outlet? Can the GUAC1 or GUAC2 USB GFCI receptacle be installed in a standard size wall box? Can the same neutral wire be used for the installation of more than one Dual Function AFCI/GFCI Receptacle? How do I know where the first outlet in the branch circuit is?