Drawing

Order number of pieces required, in multiples of Standard Package Quantity.
K.2
Cable/ConduitBeam/PurlinHangers/Hanging
Systems
Stud WallCommunication/
Low Voltage
Dry WallAcousticalMiscellaneousIndex
Sizing Information
Reference
Codes & Standards
Reference
against nail or screw penetration shall be permitted.
300.11 Securing and Supporting.
(A) Secured in Place. Raceways, cable assemblies, boxes,
cabinets, and  ttings shall be securely fastened in place.
Support wires that do not provide secure support shall not
be permitted as the sole support. Support wires and associated
 ttings that provide secure support and that are installed in addition
to the ceiling grid support wires shall be permitted as the sole
support. Where independent support wires are used, they shall be
secured at both ends. Cables and raceways shall not be supported
by ceiling grids.
(1) Fire-Rated Assemblies. Wiring located within the cavity of a
 re-rated  oor-ceiling or roof-ceiling assembly shall not be
secured to, or supported by, the ceiling assembly, including the
ceiling support wires. An independent means of secure support
shall be provided and shall be permitted to be attached to the
assembly. Where independent support wires are used, they shall
be distinguishable by color, tagging, or other effective means from
those that are part of the  re-rated design.
Exception: The ceiling support system shall be permitted
to support wiring and equipment that have been tested as
part of the  re-rated assembly.
Informational Note: One method of determining  re rating
is testing in accordance with NFPA 251-2006, Standard Methods
of Tests of Fire Resistance of Building Construction and
Materials.
(2) Non-Fire-Rated Assemblies. Wiring located within the cavity
of a non- re-rated  oor-ceiling or roof-ceiling assembly shall not
be secured to, or supported by, the ceiling assembly, including the
ceiling support wires. An independent means of secure support
shall be provided and shall be permitted to be attached to the
assembly. Where independent support wires are used, they shall
be distinguishable by color, tagging, or other effective means.
Exception: The ceiling support system shall be permitted
to support branch-circuit wiring and associated equipment
where installed in accordance with the ceiling system
manufacturer’s instructions.
300.22 Wiring in Ducts not used for Air Handling, Fabricated
Ducts for Environmental Air, and other Spaces for Environmental
Air (Plenums). The provisions of this section shall apply to the
installation and uses of electrical wiring and equipment in ducts
used for dust, loose stock, or vapor removal; ducts speci cally
fabricated for environmental air; and other spaces used for
environmental air (plenums).
Informational Note: See Article 424, Part VI, for duct heaters.
(A) Ducts for Dust, Loose Stock, or Vapor Removal. No wiring
systems of any type shall be installed in ducts used to transport
dust, loose stock, or  ammable vapors. No wiring system of any
NFPA 70; National Electric Code; 2011 Revision
(continued)