fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
Section/Paragraph: 210.12(A)(6) info 3.
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210.12 Arc-Fault Circuit-Interrupter Protection.
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(A) Dwelling Units.
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(6) Where a listed metal or nonmetallic conduit or tubing or Type MC cable is encased in not less than 50 mm (2 in.) of concrete for the portion of the branch circuit between the branch-circuit overcurrent device and the first outlet, it shall be permitted to install a listed outlet branch-circuit type AFCI at the first outlet to provide protection for the remaining portion of the branch circuit.
Exception: Where an individual branch circuit to a fire alarm system installed in accordance with 760.41(B) or 760.121(B) is installed in RMC, IMC, EMT, or steel-sheathed cable, Type AC or Type MC, meeting the requirements of 250.118, with metal outlet and junction boxes, AFCI protection shall be permitted to be omitted.
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Informational Note No. 3: See 760.41(B) and 760.121(B) for power-supply requirements for fire alarm systems.
Substantiation
The referenced code sections in Informational Note 3 are also referenced in the Exception. To apply the exception you have to already have the information in Note 3. Note 3 is redundant.
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Delete Text
210.12 Arc-Fault Circuit-Interrupter Protection.
....
(A) Dwelling Units.
....
(6) Where a listed metal or nonmetallic conduit or tubing or Type MC cable is encased in not less than 50 mm (2 in.) of concrete for the portion of the branch circuit between the branch-circuit overcurrent device and the first outlet, it shall be permitted to install a listed outlet branch-circuit type AFCI at the first outlet to provide protection for the remaining portion of the branch circuit.
Exception: Where an individual branch circuit to a fire alarm system installed in accordance with 760.41(B) or 760.121(B) is installed in RMC, IMC, EMT, or steel-sheathed cable, Type AC or Type MC, meeting the requirements of 250.118, with metal outlet and junction boxes, AFCI protection shall be permitted to be omitted.
....
Informational Note No. 3: See 760.41(B) and 760.121(B) for power-supply requirements for fire alarm systems.
Substantiation
The referenced code sections in Informational Note 3 are also referenced in the Exception. To apply the exception you have to already have the information in Note 3. Note 3 is redundant.
Inserted Deleted
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