OESC 210.12(E) Branch Circuit Wiring Extensions, Modifications or Replacements.

According to OESC 210.12(E), replacing damaged wiring in a location where AFCI protection is required will trigger the AFCI requirements.
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According to OESC 210.12(E), replacing damaged wiring in a location where AFCI protection is required will trigger the AFCI requirements.

Oregon has heavily amended the code language below regarding AFCI protection:

OESC 210.12(E) Branch Circuit Wiring Extensions, Modifications or Replacements. If branch circuit wiring for any of the areas specified in 210.12(B), or (C), or (D is not adopted), is modified, replaced, or extended, the branch circuit shall be protected by one of with the following:

  1. By any of the means described in 210.12(A)(1) through (A)(6)
  2. A listed outlet branch-circuit type AFCI located at the first receptacle outlet of the existing branch circuit.

Exception No. 1: Extensions or modifications of existing circuits shall not require the installation of AFCI protection.

Exception No. 2: Replacement or upgrading of a service or panelboard shall not require that existing circuits be protected by AFCI devices.

Exception: AFCI protection shall not be required where the extension of the existing branch circuit conductors is not more than 1.8 m (6 ft) and does not include any additional outlets or devices, other than splicing devices. This measurement shall not include the conductors inside an enclosure, cabinet, or junction box.

Oregon amendments to the 2023 NEC® are located in “Table 1-E” of the Oregon Electrical Specialty Code (OESC) which can be seen using the following link or the OESC PDF file located near the bottom of the screen: 2023 OESC

  Click here to view the OESC  

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OESC 210.12(E) Branch Circuit Wiring Extensions, Modifications or Replacements.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

Which of the following is true of a 120-volt branch circuit in an older dormitory that was not originally required by code to have AFCI protection at the time of installation?

A: It now requires AFCI protection.
B: Even if it is replaced, AFCI protection is not required.
C: An extension of the existing branch circuit will not require AFCI protection.
D: An extension of the existing branch circuit greater than 6 feet would require AFCI protection.
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