Natupal Mechanical Interlock Kit for 150/200 Amp Generator Transfer — Interlock Between BW CSR Main and BR Branch

Overview

The Natupal Mechanical Interlock Kit is designed to simplify a safe and controlled transfer between utility power and a standby generator. Placed between the Type BW CSR main breakers and the Type BR branch breakers, this kit helps ensure that both power sources cannot be energized at the same time. The result is a smoother, more predictable power management experience during outages or routine switching, without promising anything guarantees.

Designed for compatible panels

This interlock solution is built for CH, Eaton, and Murray panels that route power from the utility to a standby generator. By aligning with the BW CSR main breakers and BR branch breakers, it supports a clear, mechanical separation of the two power paths and reduces the chance of accidental simultaneous energization.

Key features and safety considerations

Important design elements include a fixed 1 1/4 inch spacing between the main and generator breakers. This spacing ensures the two sources cannot be turned on at the same time. In addition, should the panel cover be removed, the generator breaker remains in a non operable state until reassembled, adding an extra layer of control during maintenance or inspection.

• Compatible with CH, Eaton, and Murray panels featuring BW CSR main breakers and BR branch breakers
• Requires a 1 1/4 inch interval space between main and generator breakers
• Mechanical interlock prevents simultaneous operation of both power sources
• Noise-free, gear-free operation with a compact slider plate

What’s included

The package contains all components needed for installation and ongoing use. Hardware is designed for a sturdy, secure mounting, and clear labeling helps with future reference.

• 1× Mechanical interlock assembly with slider plate
• 4× 10–32 x 1/4-inch screws
• 4× 10–32 x 3/16-inch screws
• 1× Generator hold-down retainer
• 1× #5–20 x 2 7/8-inch breaker hold-down screw
• 3× Interlocked breaker labels
• 1× User Manual

Installation at a glance

• Remove the trim or metal panel cover to access mounting points
• Drill the pre‑set points from the backside as indicated, then align the interlock assembly
• Secure with the included screws from the backside for a clean finish
• Consult the user manual and apply the interlock labels to confirm the interlock state

Compatibility and usage notes

Ideal for homes that rely on a mix of utility power and backup generator, this kit offers a practical solution to manage switching while keeping the electrical system organized and readable. It is a mechanical interlock kit that complements existing electrical setups, without replacing a formal transfer switch. Always follow local electrical codes and refer to the included manual for guidance.