Cooper/Crouse Hinds WD034640 (0402974, 192594) polarizer plate; Cooper Wiring Devices/Crouse-Hinds is a division of Eaton. Plate is marked "208Y/120 VAC ARC105C BLUE" on the tab with "0402974" cast into the plate. For use with 100A APRC105 equivalent pin and sleeve receptacles.
