Westinghouse MC3800WK - 800A, 600V, 3-Pole, Switch

Westinghouse MC3800WK — 800A, 600V, 3-Pole Fusible Switch for Industrial Isolation

The Westinghouse MC3800WK is built for demanding industrial and commercial environments where reliable on/off isolation and robust overcurrent protection are non-negotiable. With an 800A rating at 600V and a compact 3-Pole design, this switch handles heavy-duty loads while staying serviceable and straightforward to maintain. It’s specifically suited for motor disconnects, panelboards, and branch circuits where space is at a premium and dependable protection matters.

Why the MC3800WK stands out

• High-capacity performance: 800A current handling at 600V supports large motors and demanding equipment without sacrificing responsiveness in fault events.
• Three-pole configuration: Perfect for 3-phase systems, providing balanced protection across all live conductors.
• Integrated fusible protection: A compact fusible switch design delivers coordinated isolation and overcurrent protection in a single, space-efficient unit.
• Engineered for maintenance: Designed for straightforward service and quick fuse changes, helping you minimize downtime during routine maintenance or fuse replacement.
• Versatile installation footprint: Ideal for motor disconnects in equipment rooms, panelboards feeding large circuits, and branch protection where a compact, reliable switch is required.

Practical applications and use cases

In manufacturing lines, the MC3800WK provides a decisive disconnect point for heavy motors, enabling safe shutdowns during maintenance or fault conditions. In commercial facilities, it serves as a reliable protection element for critical branch circuits and panelboard feeders, keeping downstream equipment safeguarded. Its compact footprint makes it a strong choice for electrical rooms with tight spacing, where you still need robust isolation and overcurrent protection.

How this improves your electrical design

By combining isolation and protection in a single, maintainable unit, the MC3800WK reduces the need for multiple discrete devices. This streamlines wiring, simplifies future expansions, and helps keep electrical rooms organized. It’s a practical pick for engineers and technicians who value dependable performance without sacrificing space or serviceability.

What you get with Westinghouse MC3800WK

• Reliable on/off isolation for high-demand environments
• Coordinated overcurrent protection suitable for large motors and heavy loads
• Compact, maintainable design that supports quick fuse changes
• Three-pole (3-Phase) configuration to suit modern industrial power systems
• A durable solution for motor disconnects, panelboards, and branch circuit protection

Installation and maintenance tips

Plan for correct fuse sizing and wiring per your load requirements and local electrical codes. Keep replacement fuses readily accessible for rapid maintenance, and schedule periodic inspections of connections and enclosure integrity to ensure ongoing reliability. The MC3800WK is designed to be a straightforward, long-lasting component in your protection strategy, enabling safer, more efficient operation of your electrical systems.