Allen-Bradley 1494R-N11A Safety Interlock Switch is a safety interlock accessory in the 1494R family of disconnect switches, designed to enforce safe door interlock sequencing on industrial safety enclosures. The associated lug-kit variant (1494R-N11) provides two copper wire leads sized #1/0 to 350 MCM and is rated for 600 A, with two lugs per kit, for use with 1491 fuse blocks (N621 or R621). This interlock arrangement helps ensure that a guard or door cannot be opened while the disconnect is energized, supporting safe maintenance and operation in heavy-duty electrical installations.
