The GenInterlock GE-200VL is a generator interlock kit designed for General Electric vertical throw 150 and 200 Amp panels. Its primary function is to prevent the main breaker and the generator breaker from being turned on simultaneously, ensuring safe operation and compliance with electrical codes. This mechanism is crucial for preventing backfeeding into the utility grid, which can be extremely dangerous for utility workers and cause damage to electrical systems.
Function Description:
The interlock kit provides a mechanical means to ensure that only one power source (either the utility main or the generator) can supply power to the electrical panel at any given time. This is achieved through a sliding plate mechanism that physically blocks one breaker from being switched on if the other is already in the "on" position.
When the main breaker is in the "on" position, the interlock prevents the generator breaker from being turned on. Conversely, when the generator breaker is in the "on" position, the interlock prevents the main breaker from being turned on. This fail-safe design is fundamental to electrical safety when integrating a portable generator into a home or business electrical system.
The kit is specifically designed for panels where the main breaker is a 200 amp single-handle vertical throw type, with the "down" position being "off" and the "up" position being "on." The generator breaker is intended to be installed in the top left side, occupying two positions.
Important Technical Specifications:
- Model: GE-200VL
- Compatibility: General Electric Vertical Throw 150 and 200 Amp Panels
- Breaker Spacing: Designed for panels with 2 ½ to 3 ½ inch spacing between breakers.
- Main Breaker Type: 200 amp single-handle vertical throw (down for off, up for on).
- Generator Breaker Position: Top left side, occupying 2 positions.
- Installation Method: Requires drilling holes in the panel cover for mounting the interlock plates.
- Safety Features: Mechanical interlock, warning labels for generator start-up procedure, caution for portable generator on site, and a warning against exceeding generator capacity.
Usage Features:
The GenInterlock GE-200VL is designed for straightforward, albeit professional, installation and operation.
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Installation Process:
- Disassembly and Marking: The process begins by disassembling the interlock and placing the bottom plate (holes only) on the panel cover, aligning it with the contour of the main breaker and above the top left breaker. This allows for marking the drilling locations.
- Panel Preparation: The main breaker must be turned off, and the panel cover removed.
- Drilling: Holes are drilled in the panel cover using a supplied 3/16 inch drill bit. Any burrs from drilling must be removed to ensure smooth operation and prevent damage.
- Assembly: Screws are inserted from the rear of the cover. The bottom plate is then installed, followed by the top (slotted) plate. Thread lock is applied to the screws, and retaining nuts are installed, ensuring proper movement of the interlock mechanism.
- Breaker Installation: A 2-pole generator breaker is installed on the top left side of the panel. A "Generator Warning Sticker" is placed on the generator breaker.
- Cable Management and Final Labeling: Zip ties are combined to form a loop and installed around the top set of breakers in the panel, pulled tight, and trimmed. A "Warning" label is placed next to the release tab on the zip tie at the generator breaker.
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Operational Verification: After installation, the panel cover is re-installed, and the interlock's proper operation must be verified:
- With the main breaker ON, the generator breaker should be OFF and should NOT be able to be turned on.
- With the generator breaker ON, the main breaker should be OFF and should NOT be able to be turned on. This confirms the interlock's functionality.
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Generator Start-Up Procedure: A dedicated "Generator Start-Up Procedure" label is provided to be placed on the panel box, along with a "CAUTION" label on the panel box and electric meter pan. These labels guide the user through the safe process of activating the generator and transferring power. The procedure typically involves:
- Plugging the power cord into the generator and inlet box.
- Starting the generator and allowing it to warm up.
- Turning off all high-load breakers (e.g., electric stove, cooktop, oven, air conditioner).
- Turning off the main breaker.
- Using the interlock to block the main breaker and then turning on the generator breaker.
- Gradually turning on other breakers, being careful not to exceed the generator's capacity.
Maintenance Features:
The GenInterlock GE-200VL is primarily a mechanical device, and its maintenance is minimal, focusing on ensuring proper function and adherence to safety guidelines.
- Regular Verification: The most important maintenance aspect is the regular verification of the interlock's proper operation, as described in the "Operational Verification" section. This should be done periodically and certainly before each use of the generator.
- Visual Inspection: Periodically inspect the interlock mechanism for any signs of wear, damage, or obstruction that might impede its movement. Ensure all screws and retaining nuts are secure.
- Cleanliness: Keep the interlock mechanism free from dust, debris, or any foreign objects that could interfere with its smooth operation.
- Warning Labels: Ensure all warning and procedure labels remain legible and securely attached to the panel. Replace any faded or damaged labels.
Important Safety Considerations:
- Qualified Personnel: The manual explicitly states that "Only qualified personnel should be working on the panel box" and "An amateur should NEVER open the panel box." This underscores the critical importance of professional installation and maintenance due to the inherent dangers of working with live electrical panels.
- National Electric Code (NEC): Users are instructed to "Please follow all rules and regulations of the National Electric Code," emphasizing compliance with established electrical safety standards.
- Interlock Malfunction: A critical warning states: "If for any reason the interlock does not function properly, DO NOT USE and contact us immediately at sales@GenInterlock.com for support and instructions." This highlights the severe safety risk associated with a malfunctioning interlock.
- Generator Capacity: Users are warned "DO NOT EXCEED GENERATOR'S CAPACITY" to prevent overloading the generator, which can lead to damage or hazardous conditions.
- Disclaimer: The manufacturer, GenInterlock.com, explicitly disclaims responsibility for "misuse or improper installation" and states that "All electrical equipment should be installed and maintained by qualified personnel. Any consequences arising from improper use is the responsibility of the user." This reinforces the need for professional handling and user accountability.
In summary, the GenInterlock GE-200VL is a vital safety device for integrating a portable generator into a General Electric electrical panel. Its mechanical design ensures that only one power source is active at a time, preventing dangerous backfeeding. While its installation requires careful attention to detail and adherence to electrical codes, its operational features are straightforward, provided proper procedures are followed. Regular verification of its functionality and adherence to safety warnings are paramount for safe and reliable power transfer.
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