Hoffman AEK115NDH, Style Electrical Interlock, NDH Style, 110/120 Volt, Steel/ZincProvide positive internal safety lockout on electrical enclosures while the equipment is energized. Use catalog numbers AEK115, AEK230 and AEK460 are used with standard Hoffman door latching mechanisms. When energized, these interlocks prevent the door handle from being turned to open the door.