Article 230 Services
230.85 Emergency Disconnects.For one- and two-family dwelling units, an emergency disconnecting means shall be installed.
(A) General.
(1) Location. The disconnecting means shall be installed in a readily accessible outdoor location on or within sight of the dwelling unit.
Exception: Where the requirements of 225.41 are met, this section shall not apply.
(2) Rating. The disconnecting means shall have a short- circuit current rating equal to or greater than the available fault current.
(3) Grouping. If more than one disconnecting means is provided, they shall be grouped.
(B) Disconnects. Each disconnect shall be one of the following:
(1) Service disconnect
(2) A meter disconnect integral to the meter mounting equipment not marked as suitable only for use as service equipment installed in accordance with 230.82
(3) Other listed disconnect switch or circuit breaker that is marked suitable for use as service equipment, but not marked as suitable only for use as service equipment, installed on the supply side of each service disconnect
Informational Note 1: Conductors between the emergency disconnect and the service disconnect in 230.85(2) and 230.85(3) are service conductors.
Informational Note 2: Equipment marked “Suitable only for use as service equipment” includes the factory marking "Service Disconnect".
(C) Replacement. Where service equipment is replaced, all of the requirements of this section shall apply.
Exception: Where only meter sockets, service entrance conductors, or related raceways and fittings are replaced, the requirements of this section shall not apply.
(D) Identification of Other Isolation Disconnects. Where equipment for isolation of other energy source systems is not located adjacent to the emergency disconnect required by this section, a plaque or directory identifying the location of all equipment for isolation of other energy sources shall be located adjacent to the disconnecting means required by this section.
Informational Note: See 445.18, 480.7, 705.20, and 706.15 for examples of other energy source system isolation means.
(E) Marking.
(1) Marking Text. The disconnecting means shall marked as follows:
(1) Service disconnect
EMERGENCY DISCONNECT,
SERVICE DISCONNECT
(2) Meter disconnects installed in accordance with 230.82(3) and marked as follows:
EMERGENCY DISCONNECT,
METER DISCONNECT,
NOT SERVICE EQUIPMENT
(3) Other listed disconnect switches or circuit breakers on the supply side of each service disconnect that are marked suitable for use as service equipment and marked as follows:
EMERGENCY DISCONNECT,
NOT SERVICE EQUIPMENT
(2) Marking Location and Size. Markings shall comply with 110.21(B) and both of the following:
(1) The marking or labels shall be located on the outside front of the disconnect enclosure with red background and white text.
(2) The letters shall be at least 13 mm (1/2 in.) high.

Material taken from the National Electric Code. is reprinted with permission from NFPA 70., 2023 edition. National Electrical Code®, Copyright 2022, National Fire Protection Association, Quincy, MA. All rights reserved.