HomeMy WebLinkAbout260534 - BOXESTHE KENT
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SECTION 26 05 34 - BOXES
PART 1 - GENERAL
1.01 SUMMARY
A. This section includes:
1. Outlet boxes.
2. Pull boxes.
3. Junction boxes.
1.02 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
B. General Requirements specifically applicable to Division 26 in addition to Division 00 and
Division 01 provisions.
C. Section 26 05 00 - Basic Electrical Requirements.
D. Section 26 05 29 – Hangers and Supports for Electrical Systems.
E. Section 26 05 30 – Conduits.
F. Section26 05 53 - Electrical Identification.
G. Section 26 27 26 – Wiring devices
H. Section 28 31 01 – Addressable Fire Alarm System.
1.03 REFERENCES
A. Review the Drawings and all sections of the Specifications for equipment furnished by other
Contractors and the Owner throughout the entire project.
B. See references noted in Specification Section 26 05 00, Paragraph 1.03.
C. NEMA 250-2008 - Enclosures for Electrical Equipment (1000 Volts Maximum).
D. NECA 1 -2006 – Good Workmanship in Electrical Contracting.
1.04 SYSTEM DESCRIPTION
A. Boxes for devices provided under Divisions 26, 27 and 28.
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1.05 SUBMITTALS
A. Submit shop Drawings and Product Data under provisions of Division 1 and Section 26 05 00.
1.06 QUALITY ASSURANCE
A. Boxes to be UL listed for application, and so labeled.
1.07 DELIVERY, STORAGE AND HANDLING
A. Deliver, Store and handle materials in accordance with Section 260500.
1.08 PROJECT CONDITIONS
A. Project Environmental Requirements.
B. Existing Conditions.
C. Conform to requirements of NFPA 70.
D. Furnish products listed and classified by UL as suitable for purposes specified and shown.
1.09 SEQUENCING AND SCHEDULING
A. Sequence and Schedule work in accordance with Division 01 and Section 26 05 00.
1.10 WARRANTY
A. Warranty in Accordance with requirements of Division 01 and Section 26 05 00.
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Boxes.
1. Appleton Electric Company.
2. Cantex, Inc.
3. Carlon/Thomas & Betts.
4. Hoffman Engineering Company.
5. Raco Inc.
6. Steel City/Thomas & Betts.
7. Thepitt.
2.02 MATERIALS
A. Outlet and Device Boxes and Accessories for Interior Installation:
1. Material:
a. Metal: Pressed sheet galvanized steel with knockouts for conduit unless
otherwise indicated.
b. Nonmetallic: Plastic.
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2. Provide device outlet boxes with raised combination device and tile covers (plaster
rings, tile rings, etc.) where installed in drywall and plaster finishes. Covers shall be
square drawn ring or square cut tile ring. Depth of rings shall be such that ring is flush
with finished surfaces.
3. Flush Mounted:
a. Ceilings:
(1) Typical Electrical Devices: 4” or 4-11/16” square outlet boxes.
Minimum depth of box without plaster ring shall be 2-1/8 inches
unless otherwise indicated.
(2) Communications Systems Outlets: Minimum depth of boxes without
plaster ring shall be 3 inches deep (1-1/2 inch deep box with 1-1/2
inch deep extension ring) unless otherwise indicated
b. Walls:
(1) Drywall and Plaster:
(i) Typical Electrical Devices: 4” or 4-11/16” square outlet boxes
with a minimum depth of box without plaster ring shall be
2-1/8 inches unless otherwise indicated.
(ii) Communications Systems Outlets: 4” or 4-11/16” square
outlet boxes with a minimum depth of boxes without plaster
ring shall be 3 inches deep (1-1/2 inch deep box with 1-1/2
inch deep extension ring) unless otherwise indicated.
(iii) Provide boxes with matching plaster ring for single-gang or
two-gang outlets unless otherwise indicated.
(iv) Provide larger or special outlet boxes as required.
(2) Masonry Walls:
(i) Typical Electrical Devices: Boxes with a minimum depth of
2-1/2 inches unless otherwise indicated.
(ii) Communications Systems Outlets: Boxes with a minimum
depth of 3-1/2 inches unless otherwise indicated.
(iii) Provide larger or special outlet boxes as required.
c. Poured Concrete:
(1) Typical Electrical Devices: Boxes rated for used in concrete and a
minimum depth of 3-1/2 inches unless otherwise indicated.
(2) Communications Systems Outlets: Boxes rated for used in concrete
and a minimum depth of 3-1/2 inches unless otherwise indicated.
(3) Provide larger or special outlet boxes as required.
B. Outlet Boxes for Exterior, Wet and Damp Location Installation:
1. Wet and Damp Locations: 16 gage galvanized steel box and cover with drip shield,
neoprene gasket and stainless steel cover screws. NEMA 250 Type 3R and Type 4.
2. Vapor and Watertight Locations: Cast ferrous type, zinc electroplates with epoxy
spray finish coat for all vapor tight and watertight fixtures in tunnels, exterior lights,
vaults, etc.
C. Provide other types of outlet boxes as indicated or required for installation conditions.
D. Boxes and Fittings For Explosion-Proof Areas:
1. Manufacturers: Subjects compliance with requirements, provide product by one of the
following:
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a. Appleton Electric.
b. Akron Electric Inc.
c. Crouse-Hinds.
PART 3 - EXECUTION
3.01 PREPARATIONS
A. For boxes mounted in insulated walls, both interior and exterior, ensure there is insulation
behind outlet boxes.
3.02 MATERIAL SELECTION – OUTLET AND DEVICE BOXES
A. All boxes shall be sized in accordance with the National Electrical Code and Underwriter’s
Laboratories approved.
B. Boxes shall be single-gang or multi-gang as indicated in the Contract Documents.
C. Metal Boxes:
1. Provide metal boxes unless other indicated or permitted by this Section.
2. For corrosive atmospheres provide boxes and covers with corrosion protection
suitable for the atmosphere in which they are installed.
3. Do not use sectional or handy boxes unless specifically indicated.
D. Nonmetallic Boxes:
1. Nonmetallic plastic boxes are acceptable for use on the third fourth and fifth floors
(residential floors) where permitted by applicable codes.
2. Nonmetallic boxes are not acceptable for use in fire walls or other fire-rated
assemblies.
3.03 INSTALLATION
A. Installation shall be in accordance with NECA practices.
B. Outlet and Device Boxes:
1. Provide outlet boxes for all lighting fixtures, wiring devices, signal devices,
telephone/voice outlets, data outlets, television/video outlets, etc.
2. Provide barriers in switch boxes for multi-gang switches where required by applicable
codes and by Section 26 27 26.
C. Mounting:
1. Flush:
a. Install all outlet boxes flush mounted unless otherwise indicated:
b. In accordance with Article 314.20 of the National Electrical Code:
c. In walls or ceilings with a surface of concrete, tile, gypsum, plaster, or other
noncombustible material, boxes shall be installed so that the front edge of the
box will not be set back of the finished surface more than 6 mm (1/4 inch).
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d. In walls and ceilings constructed of wood or other combustible surface
material, boxes shall be flush with the finished surface or project there from.
e. Where wall areas include applied wall finishes, adjust the mounting position of
outlet boxes or provide deeper plaster/tile rings to allow for the added
thickness of the finished wall. Applied wall finishes include, but are not limited
to, laminate and metal wall panel systems, backsplashes, tackable surfaces,
and counter/work surface backsplashes (such as in work rooms, science
rooms, etc.).
f. Use of “goof rings”, such as Raco “Add-A-Depth” rings, and other similar
devices is not permitted.
2. Surface and Exposed: Outlet boxes are to be installed surface mounted or exposed
as follows:
a. Install boxes surface mounted in areas above accessible ceilings.
b. Install boxes exposed where located above 10 feet in rooms with exposed
ceiling construction.
c. Outlet boxes may be installed exposed in unfinished mechanical rooms,
unfinished dedicated electrical rooms, and boiler rooms. A space shall be
considered unfinished where there are no finished ceilings, walls, or floors.
d. Outlet boxes may be installed exposed in other spaces specifically designated
by the Architect.
3. Install flush mounted outlet boxes and raised device covers so that device plates fit
tightly against finished surfaces.
4. Mount outlet boxes plumb and square with the building.
5. Where flush wall mounted outlet boxes are located back-to-back, install the boxes
staggered at least 12 inches apart to minimize sound transmission, unless otherwise
indicated.
6. Do not install outlet boxes in “through wall” manner.
7. Do not install outlet boxes “back-to-back” or within 12 inches center-to-center,
penetrating opposite sides of wall construction, and installed in a fire resistive and/or
fire rated walls.
8. Do not install outlet boxes where prohibited by fire codes or other applicable codes.
9. Provide blank cover plates for all outlet boxes that do not contain wiring devices or
other types of connectors.
10. Close all unused conduit openings with knockout closures.
D. Pull Boxes and Junction Boxes:
1. Provide pull boxes and junction boxes in accordance with the National Electrical code
and as indicated in other Sections of this specification, and on the Drawings.
2. Locate pull boxes and junction boxes above removable ceilings or in electrical,
mechanical, storage rooms, etc., wherever possible. Coordinate location of pull boxes
and junction boxes with other trades.
3. When junction boxes are located above inaccessible ceilings, locate the box
approximately twelve inches from a recessed fluorescent light fixture to allow access
to junction boxes by removal of the fixture.
4. Close all unused conduit openings with knockout closures.
5. Provide junction and pull boxes with covers.
6. Labeling: Provide circuit identification labeling as specified in Section 26 05 53.
7. Support:
a. Boxes shall be rigidly supported from the building structure and securely
fastened in place. The supporting means shall provide vertical support of the
weight of the equipment and prevent horizontal movement or sway.
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b. Boxes shall be rigidly supported from the building structure and securely
fastened in place. The supporting means shall provide vertical support of the
weight of the equipment and prevent horizontal movement or sway.
c. Do not attach boxes to ceiling support wires.
d. Remove wire used for temporary supports.
e. Arrange supports to prevent misalignment during wiring installation.
f. Fasten box supports to building structure and surfaces under provisions of
Section 26 05 29.
g. See Section 26 05 29 for additional requirements.
3.04 CONSTRUCTION
A. Coordinate installation of boxes in block, brick and masonry walls with Contractor responsible
for erecting wall.
B. Adjust position of outlets in finished masonry walls to suit masonry course lines. Locate boxes
in the top of masonry units centered in unit cells. Coordinate cutting of masonry walls to
achieve neat openings for boxes. Use rotary cutting equipment to cut masonry work for
installation of electrical fittings.
C. For all outlet boxes, including switches and receptacles mounted above counters, benches
and in backsplashes, coordinate location and mounting heights of the boxes with built-in
casework and equipment.
D. Adjust outlet box mounting height to agree with required location for equipment to be served.
END OF SECTION