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Another New Section in the 2023 NFPA 70 a/k/a NEC Disconnects for One & Two-Family Dwellings

jar546

jar546

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Here is the new code verbiage in the 2023 NEC.


225.41 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.

(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) 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.

(C) Marking.

The disconnecting means shall be marked as EMERGENCY DISCONNECT.
Markings shall comply with 110.21(B) and all 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 least 13 mm (1⁄2 in.) high.
 
Note that this in Article 225, on Outside Branch Circuits and Feeders. So it would apply in the case that the service disconnect is remotely mounted from the dwelling unit building, and the dwelling unit is supplied by a feeder. For the case of a dwelling unit supplied by a service, see 230.85.

Cheers, Wayne
 
So and ADU with a 60 amp feed from main house has to have a disconnect on exterior? How "secured" can it be? Just imagining someone pulling it in our zero degree weather while tenants are away, perhaps to disable alarm, and a total mess.
 
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