Okay, this is a common problem and a good question. You've accurately identified the issues with using a generator designed for separately derived systems with a non-switched neutral transfer switch in a home setting. Let's break down the options and why some are better than others, and address your specific proposal.

Understanding the Problem Dual Neutral-Ground Bonds

The core issue is having two neutral-to-ground bonds in the system when the generator is connected. One is in your generator, and the other is at the meter-mounted transfer switch. This creates a parallel path for neutral current. This isn't just a nuisance; it's a safety hazard. Some of the neutral current from your home will flow through the grounding conductors, which is not their intended purpose. This can cause: Erroneous GFCI tripping (in the house and potentially the generator). Overheating of grounding conductors. Elevated voltage on grounded metal parts. Increased electromagnetic interference (EMI).

GFCI Compatibility

The extra path to ground will almost certainly cause the generator's GFCI to trip immediately when you plug it in. GFCI's work by sensing a current imbalance between the hot and neutral conductors. Any current leaking to ground (which happens with the dual-bond) will trigger the GFCI.

Why Your Proposed Solution (Removing Ground) is Dangerous and Violates Code

Your idea of disconnecting the ground connection between the generator and the transfer switch is not safe and violates the NEC. Here's why: Loss of Ground Fault Path

The ground conductor (Equipment Grounding Conductor, EGC) provides a low-impedance path for fault current to flow back to the source (the generator) during a ground fault (e.g., a hot wire touching the metal chassis of an appliance). Without this path, the fault current is greatly reduced, and the overcurrent protection device (breaker or fuse) may not trip quickly enough to prevent a dangerous shock. The metallic components of the electrical system, under fault conditions, are now ungrounded and at a dangerous potential with respect to earth.

Creates a Floating Ground

Without the ground connection, the generator chassis and any connected metal parts become ungrounded. This means they could float to any voltage relative to ground. Touch them and you may become the path to ground.

NEC Violation

The NEC requires a properly installed equipment grounding conductor. You would be intentionally defeating a critical safety feature.

Acceptable Solutions (in order of preference/best practice)


Modify the Generator (Best Solution)

The ideal solution is to permanently remove the neutral-to-ground bond inside the generator. You need to access the generator's wiring and physically disconnect the bonding jumper that connects the neutral conductor to the generator frame.

Important

This must be done safely and correctly. If you are not comfortable with electrical work, hire a qualified electrician. Disconnecting the bonding jumper is a one-time fix that allows the generator to function properly in your home setting. Once the bond is disconnected, the generator relies on the home's existing grounding system via the transfer switch. This is the safest and most code-compliant method.

Document the Modification

Clearly label the generator stating that the neutral-to-ground bond has been removed.2.

Replace the Transfer Switch (Second Best Solution)

Replace the existing meter-mounted transfer switch with one that switches the neutral. This is the second best solution, as it is relatively expensive and can be a hassle depending on the installation. With a switched neutral transfer switch, the generator's neutral and ground can remain bonded.3.

Use a "Neutral Switching" Adapter (Dangerous, Avoid if at all Possible, likely non-compliant)

Some companies sell adapters designed to break the neutral-ground bond when connecting a generator. These adapters are highly questionable and can be incredibly dangerous as they would create similar issues as the removal of the ground conductor described above. Some claim to use an isolation transformer, but I have doubts. Avoid these devices at all costs.

NEC Considerations



NEC 250.30

This section covers grounding and bonding requirements for separately derived systems (like your generator when it's not connected to your house). When connected to your house through the transfer switch, the generator is no longer a separately derived system; it's acting as an alternate source of power to an existing system.

NEC 702.10

This section covers optional standby systems (like a generator for home backup). It emphasizes that the transfer equipment must be suitable for the intended use and properly installed.

NEC 250.4(A)(5)

"Electrical equipment and wiring shall be installed in a manner that creates a low-impedance circuit facilitating the operation of overcurrent devices in the circuit." This is why a good ground connection is critical.

In Summary



DO NOT remove the ground connection between the generator and the transfer switch. This is unsafe and violates code. The best solution is to disconnect the neutral-to-ground bond inside the generator. If you're not comfortable doing this yourself, hire a qualified electrician. If disconnecting the bond is not possible, the second best option is to replace the transfer switch with one that switches the neutral. Avoid any adapter that claims to handle this problem as it will create similar issues as removing the ground conductor.Always consult with a qualified electrician to ensure your installation is safe and complies with all applicable codes. Electrical work can be dangerous, and mistakes can have serious consequences. Flag for review