Blue Sea 4130 Lockout Slide 2 Position 2 Pole C-Series

The Blue Sea 4130 Lockout Slide 2 Position 2 Pole C-Series is a critical safety interlock designed to manage dual AC power sources on vessels, RVs, and stationary installations where generator and shore power must never operate simultaneously. This lockout mechanism prevents catastrophic equipment damage and electrical hazards by mechanically ensuring that only one of two double pole or triple pole circuit breakers can be activated at any given time.

The device mounts directly into the existing C-Series circuit breaker panel without requiring modifications to the panel structure. It uses the circuit breaker mounting screw holes for installation, making retrofitting straightforward on both new builds and retrofit applications. By guaranteeing isolation between AC power from the utility company and genset or inverter sources, the 4130 eliminates the risk of backfeeding or cross-current conditions that can damage sensitive electronics, blow utility transformers, or create fire hazards. The 2-position design fits all double pole and triple pole Blue Sea C-Series breakers, offering broad compatibility across marine and RV electrical systems.

This lockout slide is essential for marine electricians, RV system integrators, and boat owners managing hybrid power systems where dual-source electrical architecture is standard. It serves as a mandatory safety component in installations requiring dual-source transfer capability, ensuring that power distribution logic is enforced mechanically rather than relying on operator discipline alone. The compact form factor (4 x 3 x 5 inches) fits within standard panel layouts, and the lightweight construction (0.2 lbs) adds negligible weight to the overall electrical system.

Blue Sea Systems manufactures electrical components to marine-grade standards, and the 4130 lockout slide reflects that heritage—a purpose-built safety device backed by decades of marine electrical engineering. When dual AC sources are part of your system architecture, mechanical lockout is not optional; it is the failsafe that protects both equipment and personnel from preventable electrical faults.