Square D SC-3 - 30A, 3-Pole, Disconnect Switch, NEMA 1

Experience dependable control and protection with the Square D SC-3 30A, 3-Pole Disconnect Switch, NEMA 1. Built for indoor, demanding environments in industrial and commercial facilities, this disconnect delivers reliable on/off isolation for motors and power circuits. The 3-pole design ensures all phases shut off together, eliminating partial energization during maintenance and servicing.

Key specifications

• Model: SC-3
• Amperage: 30A
• Poles: 3-Pole
• NEMA Rating: NEMA 1

Why this disconnect stands out

The SC-3 combines a compact footprint with rugged, indoor-ready construction, making it ideal where space is at a premium but reliability cannot be compromised. Its three-pole configuration provides synchronous isolation across all energized conductors, ensuring safer maintenance and service. Designed to integrate seamlessly with standard protective devices upstream, it serves as a precise, dependable motor disconnect or solitary disconnect for panelboards and branch circuits.

Ideal use cases

• Motor disconnects on small to mid-size industrial equipment (pumps, conveyors, fans)
• Dedicated isolation for panelboards and distribution circuits
• Branch circuit protection in indoor commercial or light industrial spaces
• Maintenance-ready shutoff for equipment serving daily operations

Practical considerations and installation tips

• Place in an indoor, dry environment aligned with NEMA 1 enclosure guidelines for reliable protection
• Ensure the circuit amperage and wire sizing match the 30A rating, with appropriate upstream protection (fuses or breakers)
• Wire the line and load terminals according to standard electrical diagrams, and clearly label the disconnect for quick identification
• Use the disconnect to safely isolate equipment before servicing, enhancing maintenance safety and reducing downtime