General Electric | SL421NI | Fusible Bus Plug | 30A | 240V

Power reliability in your electrical panel with the General Electric SL421NI Fusible Bus Plug. Engineered for 30A at 240V, this part is a trusted solution for maintenance, retrofit, and replacement projects where exact specifications matter. The SL421NI designation isn't just a model number—it’s your assurance of compatibility in GE-based systems and panels that use fusible bus plugs to protect circuits.

• Amperage: 30A
• Voltage: 240V
• Part number: SL421NI
• Type: Fusible bus plug for panel protection
• Best reference for compatibility: The part number SL421NI

Why this fusible bus plug stands out

• Exact-fit compatibility — Designed to match GE panels that use fusible bus plugs, reducing guesswork during maintenance or retrofit.
• Clear, field-ready protection — Provides reliable overcurrent protection for branch circuits by incorporating a fusible element that opens when overload occurs, helping safeguard downstream equipment.
• Streamlined replacement — A straightforward, plug-in solution that minimizes downtime when a bus plug needs replacement in service panels.
• Durable construction — Built to endure the demands of routine servicing in commercial and industrial environments, ensuring stable performance over time.

Ideal use scenarios

• Maintenance on existing GE-based electrical panels that rely on fusible bus plugs for circuit protection.
• Retrofit projects where adding or upgrading protection requires an exact 30A, 240V fusible bus plug to maintain system integrity.
• Replacement of worn or failed bus plugs to restore proper protection without modifying surrounding hardware.

Important installation and compatibility notes

• Fit and ratings confirmation — Before purchasing, verify the part number and the panel’s compatibility for a seamless fit and intended protection level. The SL421NI is the best compatibility reference for this purpose.
• Professional installation recommended — For safety, efficiency, and to preserve protective ratings, have a qualified electrician perform installation and confirm system integrity after replacement.
• Documentation alignment — Keep the panel’s service manual on hand to cross-check mounting arrangements and any panel-specific requirements when using fusible bus plugs.

Practical guidance to maximize value

• Store spare SL421NI units in their original packaging to protect the fusible elements and ensure dependable performance when you need them.
• Pair with routine panel maintenance schedules to minimize downtime and ensure consistent protection across the system.
• If your application involves critical loads or non-standard configurations, consult your panel documentation to confirm that a 30A, 240V fusible bus plug aligns with the intended protection scheme.

Equipped for reliability, the General Electric SL421NI Fusible Bus Plug delivers precise, dependable protection where it’s needed most. When you need a replacement or retrofit component that you can trust to fit and perform as specified, this part is engineered to meet those exacting requirements.