Page 756 - 2018_IRC

POWER AND LIGHTING DISTRIBUTION

4.4. The combination of the branch-circuit overcur- 2. Lighting outlets shall be permitted to be controlled by
rent device and outlet branch-circuit AFCI shall occupancy sensors that are in addition to wall
be identified as meeting the requirements for a switches, or that are located at a customary wall
system combination-type AFCI and shall be switch location and equipped with a manual override
listed as such. [210.12(A)(4)] that will allow the sensor to function as a wall switch.
[210.70(A)(1) Exception No. 2]
5. Where metal outlet boxes and junction boxes and RMC,
IMC, EMT, Type MC or steel-armored Type AC cables E3903.3 Additional locations. At least one wall-switch-con-
meeting the requirements of Section E3908.8, metal trolled lighting outlet shall be installed in hallways, stairways,
wireways or metal auxiliary gutters are installed for the attached garages, and detached garages with electric power. At
portion of the branch circuit between the branch-circuit least one wall-switch-controlled lighting outlet shall be
overcurrent device and the first outlet, a listed outlet installed to provide illumination on the exterior side of each
branch-circuit type AFCI installed at the first outlet shall outdoor egress door having grade level access, including out-
be considered as providing protection for the remaining door egress doors for attached garages and detached garages
portion of the branch circuit. [210.12(A)(5)] with electric power. A vehicle door in a garage shall not be con-
sidered as an outdoor egress door.
6. Where a listed metal or nonmetallic conduit or tubing
or Type MC cable is encased in not less than 2 inches E3903.3.1 Stairway lighting outlet control. Where one
(50.8 mm) of concrete for the portion of the branch cir- or more lighting outlets are installed for interior stairways,
cuit between the branch-circuit overcurrent device and there shall be a wall switch at each floor level and landing
the first outlet, a listed outlet branch-circuit-type AFCI level that includes an entryway to control the lighting out-
installed at the first outlet shall be considered as provid- lets where the stairway between floor levels has six or
ing protection for the remaining portion of the branch more risers. Lighting outlets installed to meet this require-
circuit. [210.12(A)(6)] ment shall not be controlled by the use of dimmer switches
Exception: AFCI protection is not required for an individ- except where the dimmer switches provide the full range
ual branch circuit supplying only a fire alarm system of dimming control at each switch location. [210.70(A)(2)]
where the branch circuit is wired with metal outlet and Exception: In hallways, stairways, and at outdoor
junction boxes and RMC, IMC, EMT or steel-sheathed egress doors, remote, central, or automatic control of
armored cable Type AC or Type MC meeting the require- lighting shall be permitted. [210.70(A)(2) Exception]
ments of Section E3908.8. E3903.4 Storage or equipment spaces. In attics, under-floor
E3902.17 Arc-fault circuit-interrupter protection for spaces, utility rooms and basements, at least one lighting out-
branch circuit extensions or modifications. Where branch- let shall be installed where these spaces are used for storage
circuit wiring is modified, replaced, or extended in any of the or contain equipment requiring servicing. Such lighting outlet
areas specified in Section E3902.16, the branch circuit shall shall be controlled by a wall switch or shall have an integral
be protected by one of the following: switch. At least one point of control shall be at the usual point
of entry to these spaces. The lighting outlet shall be provided
1. A combination-type AFCI located at the origin of the at or near the equipment requiring servicing. [210.70(A)(3)]
branch circuit.
2. An outlet branch-circuit type AFCI located at the first
receptacle outlet of the existing branch circuit. SECTION E3904
[210.12(B)] GENERAL INSTALLATION REQUIREMENTS
Exception: AFCI protection shall not be required where E3904.1 Electrical continuity of metal raceways and
the extension of the existing conductors is not more than 6 enclosures. Metal raceways, cable armor and other metal
feet (1.8 m) in length and does not include any additional enclosures for conductors shall be mechanically joined
outlets or devices. [210.12(B) Exception] together into a continuous electric conductor and shall be
connected to all boxes, fittings and cabinets so as to provide
effective electrical continuity. Raceways and cable assem-
SECTION E3903 blies shall be mechanically secured to boxes, fittings cabinets
LIGHTING OUTLETS and other enclosures. (300.10)
E3903.1 General. Lighting outlets shall be provided in accor-
dance with Sections E3903.2 through E3903.4. [210.70(A)] Exception: Short sections of raceway used to provide
cable assemblies with support or protection against physi-
E3903.2 Habitable rooms. At least one wall switch-con- cal damage. (300.10 Exception No. 1)
trolled lighting outlet shall be installed in every habitable
room, kitchen and bathroom. [210.70(A)(1)] E3904.2 Mechanical continuity—raceways and cables. Race-
ways, cable armors and cable sheaths shall be continuous between
Exceptions: cabinets, boxes, fittings or other enclosures or outlets. (300.12)
1. In other than kitchens and bathrooms, one or more Exception: Short sections of raceway used to provide
receptacles controlled by a wall switch shall be con- cable assemblies with support or protection against physi-
sidered equivalent to the required lighting outlet. cal damage. (300.12 Exception No. 1)
[210.70(A)(1) Exception No. 1]

2018 INTERNATIONAL RESIDENTIAL CODE ® 731
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