Square D D324NRB - 200A, 240V, Safety Switch, NEMA 3R

Meet the Square D D324NRB — a robust 200A, 240V safety switch designed to provide reliable on/off isolation and overcurrent protection in demanding industrial and commercial environments. With a NEMA 3R enclosure, this unit stands up to weather, dust, and incidental moisture, making it a dependable choice for both indoor and outdoor installations.

Key specifications

• Model: D324NRB
• Amperage: 200A
• Voltage: 240V
• NEMA Rating: NEMA 3R
• Application: Ideal for motor disconnects, panelboards, and branch circuit protection where a compact, maintainable fusible switch is required

What makes this safety switch stand out

• Outdoor-ready, weather-resistant enclosure thanks to the NEMA 3R rating, enabling safe operation in exposed or challenging environments.
• Compact footprint paired with a maintainable fusible design supports easy installation and straightforward fuse changes, reducing downtime during servicing.
• Reliable on/off isolation paired with built-in overcurrent protection to safeguard motors, feeders, and connected equipment.
• Specifically suited for motor disconnects and panelboard feeds, offering a practical, space-saving solution for harsh industrial settings.

Ideal use cases

• Motor disconnects on conveyors, pumps, fans, and other industrial equipment
• Feeding and protecting loads in panelboards and branch circuits
• Outdoor or harsh-environment installations where robust, weatherproof protection is essential

Tips for optimal use

• Confirm 200A feeders and 240V supply align with your load requirements.
• Plan a straightforward maintenance routine to inspect the fusible switch and replace fuses promptly when needed.
• Label circuits clearly and implement proper lockout/tagout practices to ensure safe servicing.