NEC 230.85: Emergency Disconnect Requirements for One- and Two-Family Homes

Firefighters at a house fire want the power off before they go in, and a main breaker in the basement doesn't help them. NEC 230.85 is the rule that puts a shutoff outside.

Short answer: NEC 230.85, added in the 2020 edition, requires one- and two-family dwellings to have an emergency disconnect at a readily accessible outdoor location, marked as such, so first responders can de-energize the house without entering it. It can be the service disconnect itself, a meter disconnect, or another listed switch or breaker ahead of the service disconnect. The 2023 edition reorganized the section and added a replacement trigger and specific label rules, and it applies to new and replaced services where your jurisdiction has adopted it, not retroactively to every house.

What does NEC 230.85 require?

The 2023 edition splits the section into five parts for one- and two-family dwelling units:

• (A) General. The disconnect goes in a readily accessible outdoor location on or within sight of the dwelling unit; the NEC defines "within sight" as visible and not more than 50 ft away. It needs a short-circuit current rating equal to or greater than the available fault current, and if there is more than one, they must be grouped.
• (B) Disconnects. Each one must be one of three permitted types, below.
• (C) Replacement. Where service equipment is replaced, the whole section applies, with one exception covered further down.
• (D) Other energy sources. Where the isolation equipment for solar, batteries, a generator or another source isn't next to the emergency disconnect, a plaque or directory at the emergency disconnect must say where it is.
• (E) Marking. The wording, color, size and location of the label.

The 2020 version was one paragraph with the same core: an outdoor, readily accessible disconnect, rated, grouped, one of three types, each marked.

Which disconnects qualify?

The 2023 text adds that the third type must be marked suitable for use as service equipment, and neither of the last two may be marked "suitable only for use as service equipment".

The practical split is where the service equipment ends up. With the first type, the outdoor device is the service disconnect, so the indoor panel becomes a downstream panel. With the other two, the indoor main breaker stays the service disconnect and the outdoor device sits ahead of it. Your electrician picks based on the existing panel, the distance to it, and the utility.

What must the label say?

Under 2023 230.85(E), the marking must:

• Use the wording for its type, from the table above
• Sit on the outside front of the disconnect enclosure
• Be white text on a red background, with letters at least 1/2 in (13 mm) high
• Meet NEC 110.21(B): permanently affixed and durable enough for the environment, so not handwritten

What changed in the 2023 NEC?

• Reorganized into subdivisions (A) through (E)
• Location adds "on or within sight of the dwelling unit" to the 2020 "readily accessible outdoor location"
• Replacement clause added as 230.85(C)
• Directory for other energy sources added as 230.85(D)
• Label color, size and location added in 230.85(E)
• Feeder-supplied dwellings, such as a house fed from a meter elsewhere on the property, are covered by a parallel rule in NEC 225.41

Does 230.85 apply to existing homes?

Not retroactively. Three things decide it:

1. The adopted edition. It applies only where the 2020 or 2023 NEC is in force, and adoption varies by state and sometimes by city or county. Some jurisdictions amend the section or remove it. Ask your building department which edition it enforces.
2. The scope of work. New services must comply. Under the 2023 edition, replacing service equipment, such as the main breaker panel or a meter-main, triggers the full section. The 2020 edition had no replacement clause, so whether a panel swap triggered it came down to local interpretation.
3. The exception. Under 2023 230.85(C), replacing only meter sockets, service-entrance conductors, or related raceways and fittings does not trigger it. Restoring a storm-damaged mast and socket, for example, doesn't by itself require adding an emergency disconnect. More in meter base replacement.

Planning a panel replacement under the 2023 edition? Budget for the emergency disconnect from the start: see electrical panel upgrade.

What about the 2026 NEC?

The 2026 edition reorganizes this again. Trade summaries of the new edition report that 230.85 was removed and its intent moved into the service disconnect location rules in 230.70, so the service disconnect of a one- or two-family dwelling itself goes outdoors and is marked as the emergency disconnect. States adopt new editions on their own schedules, so confirm the edition and exact wording with your AHJ before designing around it.

How a meter-main satisfies it

A meter-main puts the meter socket and the main breaker in one outdoor enclosure. When that breaker is the service disconnect and labeled EMERGENCY DISCONNECT, SERVICE DISCONNECT, it meets 230.85 with no extra enclosure. The indoor panel then becomes a downstream panel on a four-wire feeder with isolated neutrals, a trade-off covered in meter main combo vs separate meter and panel. On a 320 amp meter base meter-main with two 200 A breakers, both breakers are service disconnects, grouped in the same enclosure, and each one is marked.

The alternative keeps the indoor main-breaker panel as the service equipment and adds a listed outdoor disconnect ahead of it, the third type in the table.

How to tell whether your house has one

From the ground, without opening anything:

• A red label with white letters reading EMERGENCY DISCONNECT at or near the meter is the clearest sign.
• A breaker handle or hinged door on the meter enclosure means a meter-main. Opening that outer door to read the label is fine; removing any inner cover is not.
• A separate gray box between the meter and the wall is a standalone disconnect; its label says whether it is the service disconnect.
• Just a meter, with the main breaker indoors, means no outdoor emergency disconnect, which is normal under earlier codes.

Switching it off de-energizes everything downstream, but the meter socket and the conductors feeding it stay live. Never open the meter section or break the utility seal.

Why is this electrician work?

Adding an outdoor disconnect changes the service: a utility disconnect, line-side terminations no breaker of yours protects, a device rated for the fault current the utility can deliver, and a decision about where the single neutral-to-ground bond lives. It is permitted, inspected work, and the utility approves the meter mounting equipment, including any socket with a built-in disconnect.

Standards and code reference

• NEC 230.85: emergency disconnects for one- and two-family dwelling units (2020 NEC onward); in the 2023 edition, (A) location, rating and grouping, (B) permitted disconnects, (C) replacement and its exception, (D) directory for other energy sources, (E) marking
• NEC 225.41: emergency disconnects for feeder-supplied one- and two-family dwellings (2023 edition)
• NEC 230.82: equipment permitted on the supply side of the service disconnect, including meter disconnects
• NEC 230.70: service disconnect location; reported to carry the outdoor requirement in the 2026 edition
• NEC 110.21(B): field-applied hazard markings, permanently affixed and durable for the environment
• NEC 250.24: the neutral-to-ground bond at the service disconnect

Code editions and local amendments vary. Confirm the adopted edition with your AHJ, and treat manufacturer instructions as governing wherever they are more restrictive.

Where to go next

• What is a service disconnect
• Meter main combo vs separate meter and panel
• Meter base replacement
• How to shut off power to your house
• Size the service first: home electrical load calculator

More in our electrical panel guides.