Square D D323NRB Fusible Safety Switch NEMA 3R

Square D by Schneider Electric D323NRB is a 100 A, 240 V fusible general‑duty safety switch with a 3‑pole, 4‑wire configuration and a NEMA 3R outdoor enclosure designed for durable outdoor disconnects. The NRB variant adds a rain‑proof NEMA 3R enclosure with neutral terminal, bolt‑on hub provisions for conduit entries, and a 4‑wire connection capability, making it suitable for outdoor motor control of three‑phase equipment in residential and light commercial installations. With a horsepower rating up to 30 hp at 240 VAC, this safety switch provides a robust, code‑compliant means to safely disconnect power to pumps, fans, compressors, conveyors, and similar loads in environments where exposure to weather is a concern. As part of Square D’s general‑duty safety switch family, the D323NRB emphasizes straightforward manual operation, reliable protection, and a compact footprint that fits standard electrical enclosures and service entrances. Use with appropriate fuse carriers in the switch’s fusible configuration to ensure proper overcurrent protection, and install per local electrical codes and Schneider Electric guidelines for outdoor, 4‑wire, 100‑amp disconnects.