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SESK: Stuff Everyone Should Know · sesk.info/elec-service-disc-location

Outside of one- and two-family dwellings, a service disconnect installed indoors must be where?

Nearest the point of entry of the service conductors.

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  1. Farthest from the entry
  2. In the attic
  3. Nearest the point of service conductor entry ✔

Why: Section 230.70 keeps the disconnect close to where the service conductors enter, so long runs of unprotected conductors inside the building are avoided.

Huh, didn't know that: The 2026 NEC adds that one- and two-family dwellings must have the disconnect outdoors.

The dad joke
Why did the disconnect sit near the door? It wanted to be first on scene.
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References

Answer: Nearest the point of service conductor entry. Section 230.70 keeps the disconnect close to where the service conductors enter, so long runs of unprotected conductors inside the building are avoided.

  1. EC&M: NEC Requirements for Services Part 2 www.ecmweb.com/national-electrical-code/code-basics/article/55021883/nec-requirements-for-services-part-2
    readily accessible location either outside the building or inside nearest the point of service conductor entry
    Checked 2026-10-11.
  2. EC&M: Key Revisions to Chapter 2 of the 2026 NEC www.ecmweb.com/national-electrical-code/code-basics/article/55400217/key-revisions-to-chapter-2-of-the-2026-nec
    The service disconnect must be outdoors for one- and two-family dwellings.
    Checked 2026-10-11.

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