Okay, let's break down your plan and address the feasibility and some considerations.

Your Plan: Summary and Validation

Your plan is generally sound:1. Replace Existing Meter Pedestal

Upgrade the existing meter pedestal with a meter main combo designed for an interlock.2.

Interlock Breaker

Install an interlock kit and a 50A 2-pole breaker for generator input.3.

50A Inlet

Connect a 50A power inlet box for the generator.

Key Considerations and Recommendations1. Code Compliance

Crucial!

Get a qualified electrician to do this work. Mobile home electrical systems have very specific requirements. Improper installation can be dangerous and violate local codes, insurance requirements and void the homeowner's insurance. Your local inspection authority will need to inspect and approve the setup.2. Generator Sizing and Breaker Selection

You have a 12kW generator. A 12kW generator at 240V can supply approximately 50 amps (12,000W / 240V = 50A). A 50A 2-pole breaker is a good match. However, ensure the generator's output breaker on the generator itself is also rated at 50A or less. If it is larger, you might need to reduce the inlet breaker size. If your generator has a 30A twist lock outlet (L14-30), that is your limiting factor. Remember, your relatives can't pull more than 50A total from the generator, even if the house has more breakers. Overloading the generator will trip its internal breaker or damage it.3.

Interlock Kit Selection

The interlock kit must be specifically designed for the meter main combo you choose. They are not universally compatible. Check for UL listing.4.

Neutral and Ground Bonding

Extremely Important! Mobile homes have specific grounding requirements. Typically, in the main panel (which will now be the meter main), the neutral and ground are bonded. The generator must not have its neutral bonded to ground when used as a standby source. You have two primary options:

Floating Neutral Generator

Get a generator that does not have the neutral bonded to ground. Some generators have a switch to disconnect the neutral bond. This is the preferred method.

Switched Neutral

If the generator does have a bonded neutral, an electrician could install a transfer switch that disconnects the neutral bond in the meter main when the generator is connected. This is more complex and requires careful wiring. Improper grounding can create dangerous circulating currents and potential for electric shock.5.

Load Management

Educate your relatives about load management. They need to understand that they can't run everything at once on the generator. Prioritize essential circuits (refrigerator, some lights, furnace/AC blower). Turn off large appliances (water heater, electric stove, clothes dryer) while on generator power.6.

Fuel Storage and Safety

Ensure proper fuel storage for the generator (gasoline or propane). Follow all safety precautions regarding fuel handling and storage. Carbon monoxide is a deadly hazard. The generator must be operated outdoors, away from windows and doors. Install CO detectors inside the mobile home.7.

Inlet Box Location

Mount the power inlet box in a convenient and accessible location near the meter main, but away from potential hazards (e.g., lawnmowers, water sprinklers).

Manufacturer Recommendations (Meter Main Combos with Interlock Options)

These manufacturers are commonly used and offer meter main combos with interlock options. Confirm the specific model is suitable for mobile home service and allows an interlock kit



Square D

Square D QO series meter mains are popular and have interlock options available. Check their product catalog for "combination service entrance devices."

Eaton (Cutler-Hammer)

Eaton CH series meter mains are also well-regarded.

Siemens

Siemens offers meter main combo units.

Milbank

Milbank makes a wide variety of meter sockets and meter mains, including models suitable for mobile home service.

To find the right model


Visit the manufacturer's website.2.

Look for "Combination Service Entrance Devices" or "Meter Main Combos."3.

Filter by amperage (200A).4.

Look for options that explicitly state they are "interlock ready" or have compatible interlock kits available.5.

Download the product specifications and installation instructions.6.

Show the specs to your electrician.

Example Shopping Search

`"Square D 200 amp meter main combination interlock"` or `"Eaton 200 amp meter main combination interlock"`

Steps to Implement1.

Hire a Qualified Electrician

This is not a DIY project. Electrical work can be dangerous and must be done to code.2.

Discuss the Plan with the Electrician

Review your plan and all the considerations with the electrician. They can assess the existing service, recommend specific equipment, and ensure code compliance.3.

Obtain Necessary Permits

Your electrician will handle permit applications.4.

Purchase the Equipment

Based on the electrician's recommendation, purchase the meter main combo, interlock kit, breakers, inlet box, and wiring.5.

Install the Equipment

The electrician will install the equipment according to code.6.

Inspection

The local electrical inspector will inspect the installation.7.

Testing

The electrician will test the system to ensure it is working correctly.8.

Education

The electrician will educate your relatives on how to safely operate the generator and manage loads.

In Summary*Your plan is feasible with the right equipment and proper installation by a qualified electrician. Prioritize safety, code compliance, and load management. Do not cut corners on safety! This work requires the skill and knowledge of a professional. Good luck! Flag for review