Okay, let's break down the requirements and common interpretations regarding Emergency Disconnects for one- and two-family dwellings, particularly with your specific scenario in mind. The relevant section of the National Electrical Code (NEC) is 230.85 Emergency Disconnects.Understanding the Emergency Disconnect Requirement (230.85)



Purpose

The primary intent of 230.85 is to provide first responders (firefighters, police, etc.) with a readily accessible and reliable means to de-energize the entire electrical system of the dwelling in an emergency situation. This reduces the risk of electrical shock hazards during rescue operations.

Location

The disconnect must be located in a readily accessible outdoor location. Common examples include: Outside the building. Near the point of entry of the service conductors into the building. Other locations that are readily accessible to first responders. IMPORTANT: The location must be permanently marked as an "Emergency Disconnect."



Type

The disconnect must be suitable for use as service equipment (e.g., rated for interrupting the available fault current).

Accessibility

This is the key point related to your "one hand movement" question. The disconnect must be capable of disconnecting all power to the dwelling with a minimal number of actions.

Your Meter/Main Combo Scenario and Hand Movements

Here's where the interpretation comes in:

NEC Language

The NEC doesn't explicitly state "one hand movement." It focuses on "readily accessible" and the overall purpose of quickly disconnecting all power to the dwelling.

Multiple Breakers - Dwelling and Garage

This is where your setup becomes problematic. If you have separate breakers within the meter/main combo to disconnect the dwelling and the garage separately, it generally

DOES NOT meet the intent of 230.85. Here's why:

Reason 1 - All Power Must Be Disconnected

The emergency disconnect must de-energize all power to the dwelling. If someone needs to throw two separate breakers (one for the dwelling and one for the garage), this is not a quick, reliable disconnect of all power to the building. There is an increased chance that the garage breaker would be missed in an emergency situation, leaving the garage energized.

Reason 2 - Number of Operations

While it doesn't say "one hand," multiple steps create delays and opportunities for errors, directly contradicting the safety intent.

Acceptable Solutions (With One Operation)

Here are common solutions to comply with 230.85:1.

Main Breaker Only

The meter/main combo has one main breaker that disconnects all power to both the dwelling and the garage feed. This single breaker fulfills the intent of 230.85. This is the most common and recommended solution.
2.

Single Two-Pole Breaker (In Some Cases, Check with Local AHJ)

The meter/main has a main lug only and a single two-pole breaker installed to feed the dwelling and garage. This would require special instructions and labeling as well as inspection authority approval.3.

Contact the AHJ Ultimately this is up to the authority having jurisdiction. They will have the final say on your install and you should seek approval from them.

Surge Protection and Energized Circuits



Acceptable

It's generally acceptable for the surge protection device (SPD) to remain energized after the emergency disconnect is activated. The reasoning is: The SPD is protecting the service equipment itself. It's considered a low-risk component for firefighters. The SPD will likely be directly connected to the service conductors on the line side of the disconnect.

Important

However, the SPD must be properly rated and installed according to NEC Article 285.

Summary and Recommendations


Avoid Separate Breakers for Dwelling and Garage

Do not use separate breakers within the meter/main combo as the primary emergency disconnect. This likely violates 230.85.
2.

Single Main Breaker

Use a single main breaker in the meter/main combo that disconnects all power (dwelling and garage).3.

Surge Protection Okay to Remain Energized

The surge protection device is generally acceptable to remain energized on the line side of the emergency disconnect.4.

Consult Your Local AHJ

This is crucial. The Authority Having Jurisdiction (AHJ), which is your local electrical inspector, has the final say. Discuss your proposed installation with them before you begin work to ensure compliance. Get their approval in writing if possible.5.

Proper Labeling

Ensure the disconnect is clearly and permanently labeled as the "Emergency Disconnect."

Example Scenario:Let's say you have a 200A meter/main combo. You want to feed a 150A panel in the house and a 60A subpanel in the detached garage. The correct way to do this for emergency disconnect compliance is: Meter/main combo with a single 200A main breaker. From the load side of the 200A breaker, feed the 150A panel in the house. From the load side of the 200A breaker, feed the 60A subpanel in the detached garage. The 200A main breaker acts as the emergency disconnect.By having that single 200A breaker, one movement de-energizes the entire electrical system of the property. Flag for review