Okay, let's break down the Ohio-specific requirements for meter base and mast replacements, focusing on the disconnect requirements in light of NEC 230.85(C).

General Requirements (Ohio and NEC) Permits and Inspections

Replacing a meter base and mast absolutely requires permits and inspections in Ohio. This is non-negotiable. Contact your local municipality or county building department to obtain the necessary permits before starting any work. They are responsible for enforcing the National Electrical Code (NEC) as adopted by Ohio.

NEC Compliance

Ohio adopts the NEC (usually with a delay of a year or two). Your work must comply with the currently enforced version of the NEC. The local authority will be able to tell you which version they are enforcing.

Licensed Electrician

While it's possible to do electrical work on your own home in Ohio, it's strongly discouraged unless you're very experienced and knowledgeable about electrical codes. A licensed electrician is highly recommended, and in some jurisdictions, may be required for this type of work. Using a licensed electrician helps ensure the work is done safely and to code.

Utility Company Coordination

You must coordinate with your local electric utility company. They will need to disconnect and reconnect power to the service. They often have specific requirements for meter base installations that go beyond the NEC.

The Disconnect Question (NEC 230.85(C))

NEC 230.85 deals with emergency disconnects for dwelling units. Here's the crux of the issue: NEC 230.85(A)

Requires an emergency disconnect readily accessible on the outside of a dwelling unit. This is often referred to as an "exterior disconnect."

NEC 230.85(C) Exception

This is the key part. It provides an exception to the requirement for an exterior disconnect in certain situations. It generally states that if you have a readily accessible service disconnect inside the dwelling unit, near the point of entry of the service conductors, and it meets specific requirements for marking and accessibility, then you might not need an exterior disconnect.

Summary Consult the AHJ (Authority Having Jurisdiction)

The most important step is to contact your local building department (AHJ) and ask them directly. Explain that you are replacing the meter base and mast and ask specifically if they require an exterior disconnect according to NEC 230.85. Provide the inspector with the details of where your indoor disconnect is located.

Important Considerations



"Readily Accessible"

This is a key term in the NEC. It means the disconnect must be capable of being reached quickly for operation, without climbing over or removing obstacles.

Marking

The disconnect must be clearly and permanently marked as the service disconnecting means.

AHJ Interpretation

Even with the exception, the AHJ has the final say. They may have local amendments or interpretations of the NEC that affect the requirement.

Safety: Even if not required*, an exterior disconnect provides an added layer of safety for first responders in an emergency.In conclusion, do not proceed without a permit and contact with the local AHJ. If you are unsure, hire a qualified electrician. Flag for review