Okay, this is a common point of confusion and inconsistency. Let's break down the correct way to bond a 400A split-bus panel service based on the NEC (National Electrical Code), and then address the inspector's requests.

The Correct (NEC-Compliant) Method

The core principle is to establish a single point where the neutral conductor is bonded to the grounding electrode system. Here's how it should be done according to the NEC:1.

Service Entrance Point

The service entrance point is where the neutral is bonded to the grounding electrode system. In your case, you should choose one location to bond at. Either the meter can or the first 200 amp panel.2.

Grounding Electrode System (GES)

A proper grounding electrode system must be in place. This typically involves a ground rod, a concrete-encased electrode (Ufer ground), a metallic water pipe (with supplemental electrode), or a ground ring. All elements of the GES must be bonded together.3.

Main Bonding Jumper (MBJ)

This is crucial. The MBJ is a conductor (busbar, wire, etc.) that connects the neutral (grounded) conductor to the equipment grounding conductors (the grounds). This is the ONLY place in the system where the neutral and ground are intentionally bonded together.4.

Equipment Grounding Conductors

Equipment grounding conductors (EGCs, the bare or green wires) run with all branch circuits back to the panel where the circuit originates. They connect to the grounding busbar in each panel. These ground wires provide a low-impedance path for fault current to return to the source, allowing the overcurrent device (breaker or fuse) to trip.5.

Feeder to Second Panel

The feeder running from the first 200A panel to the second 200A panel must include

four conductors

two hots, one neutral, and one equipment grounding conductor. The equipment grounding conductor from the first panel must be connected to the grounding busbar in the second panel.

Applying This to Your Specific Scenarios & Addressing the Inspector's Requests

Let's analyze the inspector's requests:

Scenario 1: Electrode Conductor to Meter Can, Bonding to Neutral in Meter, Isolated Grounds in 1st Panel, Equipment Ground with Feeder



NEC Compliance

Potentially compliant, but with caveats. If the meter can is considered the service equipment enclosure, this could be compliant as long as the neutral is bonded to the meter can using a main bonding jumper, and a 4-wire feeder is run to the first panel.

Concerns

Inspectors can be difficult in this case, and the reasoning isn't as clear. This would require the meter can to be big enough to handle all the connections and main bonding jumper.

Important

The equipment grounding conductor (EGC) must run with the feeder to the first panel.

Scenario 2: Bonding in Meter Can AND First Panel, No Equipment Ground Between Meter Can and First Panel



NEC Compliance: DEFINITELY NOT COMPLIANT. This creates parallel paths for neutral current. Neutral current would flow on both the neutral conductor and the metal conduit/enclosure between the meter can and the first panel. This is a major safety hazard. Why it's wrong

Parallel neutral paths can cause the metal enclosure to become energized, create unwanted electromagnetic interference (EMI), and potentially overload the neutral conductor, leading to overheating and fire.

Scenario 3: Electrode Conductor to First 200A Panel, Isolated Ground/Neutral in Meter Can



NEC Compliance

Potentially Compliant, but depends on installation.



What to look out for

The meter can needs to be rated for service equipment. If it is not, the first panel will need a 4 wire feeder.

Important

Make sure your panels are rated for the appropriate short circuit current.

Key Takeaways and How to Handle the Inspector


Single Point Bond

The most important thing is a

single point where the neutral is bonded to ground. This point should be readily accessible.2.

Four-Wire Feeder

Any feeder between panels must be four-wire (two hots, neutral, ground).3.

NEC is the Standard

The NEC is the minimum standard. Inspectors can't arbitrarily make up their own rules that contradict the NEC.4.

Documentation and Communication



Document everything. Take pictures of your installations before they are covered up.

Politely ask for clarification. Ask the inspector to cite the specific NEC article they are referencing for their requirement.

Escalate if necessary. If you believe the inspector is wrong, politely ask to speak to their supervisor.

Consider a formal interpretation. If disagreements persist, your local electrical board or the NEC itself offers processes for formal interpretation of code requirements. This can be a lengthy process, but it provides a definitive answer.5.

Local Amendments

Be aware that some jurisdictions may have local amendments to the NEC. These amendments must be followed in addition to the NEC requirements. Find out if your area has any such amendments that relate to service bonding.

In conclusion:* While the inspector's inconsistencies are frustrating, focus on understanding the core principles of NEC-compliant bonding. Properly grounding and bonding the service entrance is critical for safety. If the inspector insists on something that violates the NEC (like Scenario 2 above), politely but firmly push back and request clarification and code references. If necessary, escalate the issue through the proper channels. Flag for review