Originally Posted By: jtedesco
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Arc Fault Current Interrupters (AFCI)
All smoke detectors in a single-family dwelling are on 120-volt circuit.
Three smoke detectors are installed in the bedrooms and two are installed in the bedroom hallways. Is this circuit required to have AFCI protection? I wouldn't want to lose the smoke detector protection if the AFCI trips out.
Yes, see 2002 NEC Section 210.12 which requires all branch circuits that supply 125-volt, single-phase, 15- and 20-ampere outlets installed in dwelling units bedrooms shall be protected by an arc-fault circuit interrupter listed to provide protection of the entire branch circuit.
As to smoke detectors, CMP-2 did consider the issue of smoke detectors. For example, see Comment 2-77, May 2001 ROC concerning the elimination of outlets that connect smoke detectors in bedrooms.
This comment was rejected as CMP-2 stated that they reaffirm the requirement for AFCI protection in dwelling unit bedrooms, including smoke detector outlets, as there has been no data submitted substantiating why smoke detectors should be deleted from the AFCI requirement.
Both code and standard regulations require that smoke detectors are not only required to be hardwired to 120-volt circuitry, but they also require battery backup. Also, see NFPA 72.
Is arc fault protection required on a 120-v bedroom heater? How about a 240v?
Article 210.12 requires AFCI protection for all 15 and 20 amp, 125-volt outlets in bedrooms. The 120-volt heater would require AFCI protection. A 240-volt heater would not require AFCI protection.
A hydro-massage tub is installed in a master bedroom. There is no stool or sink. Does the dedicated GFCI circuit for the tub require AFCI protection?
If it is a 15 or 20-amp, 125 volt circuit, it would require AFCI protection according to Article 210.12.
Joe Tedesco, NEC Consultant