Okay, let's break down the situation and the code implications.

Understanding the Situation



Existing GEC Encased in Stucco

This makes accessing the GEC challenging and potentially destructive to the stucco.

Meter/Main Combo Upgrade

This means you're likely replacing the service entrance equipment, and therefore you're required to bring the grounding system up to current code.

Proposed Solution

Cut the existing GEC. Use a direct burial Kearney connector (split bolt connector) near the first grounding electrode. Run a new #4 Solid Bare Copper (SDBC) GEC from the Kearney connector to the new meter/main.

Code Considerations (Based on NEC 2020, but check your local amendments)



NEC 250.64(C): Continuous

The GEC must be continuous from the equipment grounding bus (in the meter/main) to the grounding electrode without splices. There are limited exceptions.

NEC 250.64(C)(1): Splicing to an Aluminum or Copper Busbar

The GEC can be spliced using listed connectors to an aluminum or copper busbar that is mechanically fastened to the GEC.

NEC 250.64(C)(2): Irreversible Compression Type Connectors

The GEC can be spliced by irreversible compression-type connectors listed as grounding and bonding equipment. These are generally hydraulic or mechanical compression connectors, and typically require specific tooling for proper installation.

NEC 250.64(F): Protection of Grounding Electrode Conductor. Where exposed, a GEC shall be securely fastened to the surface on which it is carried. A #4 conductor is likely to require protection if exposed to physical damage. NEC 250.53(C): Grounding Electrode Connection

States how the connection is to be made to the electrode.

NEC 250.68(C): Grounding Electrode Connection This section requires grounding electrode connections to be accessible.

Analysis of Your Proposal and Code Compliance

Using a direct burial Kearney connector (split bolt connector) on the buried section of the grounding electrode conductor is

NOT generally permitted. Split bolts are not considered an "irreversible compression type connector listed as grounding and bonding equipment" as required by 250.64(C)(2) for buried splices on the GEC. The Kearney is generally not considered an irreversible compression type connector and not listed for this purpose. While direct burial rated, it does not meet the requirements of 250.64(C). The connection must be made with a method that is listed for the purpose.

Permissible Alternatives (Assuming you have access to the existing electrode)


Ideally: Replace the Entire GEC

The best and generally preferred method is to abandon the old GEC completely, especially if it's damaged or corroded. Run a new, continuous #4 SDBC GEC from the meter/main directly to the grounding electrode clamp. If the original GEC is still functional and appropriately sized for the new service, use the existing electrode conductor as a "pull wire" to bring the new, uninterrupted grounding electrode conductor back to the meter main.2.

Irreversible Compression Connector (if replacement is impossible)

If you absolutely cannot replace the entire GEC due to the stucco, the only code-compliant way to splice it underground is using an irreversible compression-type connector specifically listed for grounding and bonding applications and listed for direct burial (if applicable). You will need the correct tool to install the connector. The existing GEC must be in good condition.3.

Exothermic Weld

An exothermic weld is another acceptable method of joining the GEC.4.

Access to the connection

Make sure to provide access to the connection as required by 250.68(C).

Steps to Take


Carefully Expose the Existing GEC

Carefully remove enough stucco to expose the existing GEC without damaging the conductor itself. You need enough space to work with the connection.2.

Inspect the Existing GEC

Assess the condition of the existing GEC. If it's heavily corroded or damaged, replacing it entirely is the only safe option.3.

Select the Correct Connector (if splicing)

If the existing GEC is in good condition and you must splice it, use an irreversible compression-type connector listed for grounding and bonding, suitable for the conductor sizes, and rated for direct burial.4.

Install the Connector Properly

Follow the manufacturer's instructions precisely for installing the compression connector. Using the wrong tool or technique can compromise the connection and create a safety hazard.5.

Run the New GEC

Run the new #4 SDBC GEC from the meter/main to the grounding electrode connection.6.

Secure the GEC

Securely fasten the GEC to the building structure where it is exposed, protecting it from physical damage.7.

Inspect and Test

Have the grounding system inspected by the local electrical inspector to ensure it meets code.

Important Considerations



Local Amendments

Always check with your local electrical inspector for any local amendments to the NEC. Some jurisdictions may have specific requirements for grounding systems.

AHJ Approval

When in doubt, discuss your plan with the Authority Having Jurisdiction (AHJ) before starting the work.*

Safety First

Work on electrical systems can be dangerous. If you're not comfortable working with electricity, hire a qualified electrician.

In summary, using a direct burial Kearney connector is not the correct approach. Replace the GEC entirely if possible. If that's not possible, use a properly listed irreversible compression connector listed for grounding and bonding, direct burial, and use the proper tool. Flag for review