Okay, let's break down this situation and the best approach for connecting your generator set. There are a few key things to consider, focusing on safety, code compliance (NEC is the standard in the US, but local codes always take precedence), and best practice.

Understanding Your Existing Setup Dual Metering (Originally)

The original setup had two separate services – one for the garage and one for the house. This is important because it means the wiring between the garage and the house was likely sized to handle the full load of the house.

Current Configuration

The PUD (Public Utility District) removed the house meter and effectively "jumpered" its service, tying the house load into the garage meter.

Large Meter Can

The oversized meter can (15x24, assuming inches) is likely there because it originally housed two meters and now has the added splice.

Detached Garage

This is a key factor because it introduces the possibility of a feeder run to the house.

Hillside

You're describing a significant distance and elevation change between the garage and the house, which might affect voltage drop and cable sizing.

Evaluating the Options for Generator Connection

Here's a breakdown of whether you can splice in the meter can, and what a safer approach would look like: Splicing in the Meter Can

It's

generally not permissible to make your generator's feed connection directly inside the meter can (this is because its the point of custody with the utility). Reasons against



Utility Control

The meter can is the utility's point of connection. They typically don't allow unauthorized modifications or splices within it. It's their equipment and responsibility.

Code Compliance

NEC (and local codes) generally restrict work inside the meter can to authorized personnel (typically the utility).

Accessibility

Working inside the meter can can be hazardous due to exposed service conductors.

Potential Problems

Unauthorized changes within the meter can could lead to utility fines, service interruption, or liability in case of problems.

Using the Garage Panel as the Splice Point (Recommended Approach)

This is the safer, more code-compliant, and recommended method.

The Recommended Approach: Using the Garage Panel1. Install a Transfer Switch

This is the most important piece. You must have a properly rated transfer switch (automatic or manual) installed in the garage panel. This prevents backfeeding the grid, which is dangerous and illegal. The transfer switch will switch the load from the utility power to the generator power when the utility goes out. Size the transfer switch to handle the total load you want the generator to power.2.

Generator Interconnect Wiring

Run appropriately sized and protected wiring from your generator location to the transfer switch in the garage panel. This needs to be properly sized based on the generator's output and the distance to the transfer switch. Use conduit and appropriate connectors for outdoor exposure.3.

Load Management (Important!)

A 28kW generator may not be able to handle the entire load of both the garage and the house simultaneously, especially with 200-amp panels. Plan carefully what loads you want the generator to power. Prioritize essential circuits (lights, refrigerator, furnace, well pump, etc.). Load management devices may be needed to shed non-essential loads if the generator is overloaded.4.

Grounding

Ensure proper grounding of the generator, transfer switch, and panel. This is critical for safety.5.

Permits and Inspection

Contact your local building department and PUD to obtain the necessary permits for the generator installation. A qualified electrician will ensure that the installation complies with all codes and regulations.

Steps for Installation using the Garage Panel Approach1. Consult an Electrician

This is the most important step. A licensed electrician can assess your specific situation, determine the correct wiring sizes, select the appropriate transfer switch, and ensure the installation meets all code requirements.2.

Determine Load Requirements

Calculate the essential loads you want the generator to power. This will help determine the required capacity of the transfer switch and the generator.3.

Select a Transfer Switch

Choose a transfer switch that is rated for the amperage of your panel (200 amps in your case) and is compatible with your generator. Consider an automatic transfer switch (ATS) for seamless power transfer during an outage.4.

Wiring and Conduit

Run the appropriate size of wiring (determined by the electrician) from the generator location to the transfer switch in the garage panel, using conduit for protection.5.

Install the Transfer Switch

The electrician will install the transfer switch in the garage panel, connecting it to the generator feed and the main panel feed.6.

Grounding

Ensure proper grounding of the generator, transfer switch, and panel according to code requirements.7.

Testing

After the installation is complete, the electrician will test the system to ensure it is functioning properly.

Important Considerations Generator Location

Consider the location of the generator. It needs to be in a well-ventilated area to prevent carbon monoxide buildup, away from flammable materials, and protected from the elements.

Fuel Source

Determine the fuel source for your generator (natural gas, propane, or diesel) and ensure you have an adequate supply.

Noise

Generators can be noisy. Consider the noise level and the impact on your neighbors.

Maintenance

Generators require regular maintenance to ensure they are in good working order.

Why This Approach is Better Safety

Properly installed transfer switch prevents backfeeding and protects utility workers.

Code Compliance

Meets NEC and local code requirements.

Utility Approval

Less likely to cause issues with the PUD, as the changes are made on your side of the meter.

Proper Load Management

Allows for selective powering of essential circuits.

Disclaimer: I am an AI chatbot and cannot provide professional electrical advice. This information is for general guidance only. Always consult with a qualified and licensed electrician for any electrical work. Flag for review