ELECTRICAL CABINETS, BOXES AND FITTINGS

ELECTRICAL CABINETS, BOXES AND FITTINGS
PART 1 - GENERAL
1.01 RELATED DOCUMENTS:
A. Drawings and general provisions of Contract, including General and
Supplementary Conditions and Division 1 Specification Sections, apply to this
section.
B. Requirements of the following Division 16 Sections apply to this section.
1. “ Basic Electrical Materials and Methods.”
1.02 SUMMARY
A. This Section includes cabinets, boxes, and fittings for electrical installations and
certain types of electrical fittings not covered in other sections. Types of
products specified in this Section include:
1. Outlet and device boxes.

2. Pull and junction boxes.
3. Cabinets.
4. Hinged door enclosures.
B. Related Sections: The following division sections contain requirements that
relate to this section:
1. Division 16 - “WIRING DEVICES“
2. Division 16 - "RACEWAYS”.
3. Division 15 - “ELECTRICAL REQUIREMENTS FOR MECHANICAL
WORKS”.
1.03 DEFINITIONS:
A. Cabinets: an enclosure designed either for surface or for flush mounting and
having a frame, or trim in which a door or doors may be mounted.
B. Device Box: an outlet box desig-ned to house a receptacle device or a wiring box
designed to house a switch.
C. Enclosure: a box, case, cabinet, or housing for electrical wiring or components.
D. Hinged Door Enclosure: an enclosure designed for surface mounting and having
swinging doors or covers secured directly to and telescoping with the walls of
the box.
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E. Outlet Box: a wiring enclosure where current is taken from a wiring system to
supply utilization equipment.
F. Wiring Box: an enclosure designed to provide access to wiring systems or for the
mounting of indicating devices or switches for controlling electrical circuits.
104 SUBMITTALS
A. .General: submit the following in accordance with conditions of contract and
Division 1 specification Sections:
1. Product data for cabinets and enclosures and boxes of various types.
2. Shop drawings for special boxes, enclosures and cabinets that are to be shop
fabricated, (nonstick items). For shop fabricated junction and pull boxes,
show accurately scaled views and spatial relationships to adjacent equipment.
Show box types, dimensions, and finishes. Show mounting methods, indoor,
outdoor or other.
1.05 QUALITY ASSURANCE:
A. Manufacturers: firms regularly engaged in manufacture of electrical cabinets,
enclosures, boxes and fittings, of types and sizes and capacities required, whose
products have been in satisfactory use in similar service for not less than 3 years.
B. Standards: IEC439, IEC536, IEC144 and 79, NFC 63-410, BS4662, BS54861.1,
NFC 15-100, C13-100, C12-100 or approved equal for system of wiring selected.
C. Listing and Labeling: items provided under this section shall be listed and labeled
by International standards where applicable and approved for the project.
PART 2 - PRODUCTS
2.01 MANUFACTURERS:
A. Available Manufacturers: subject to compliance with requirements, specifications,
drawings and regulations.
B. For approved manufactures refer to recommended manufacturer list.
2.02 CABINET, BOXES AND FITTINGS, GENERAL:
A. Electrical Cabinets, Boxes, and Fittings: of indicated types, sizes, and protection
classes. Where not indicated, provide units of types, sizes, and classes appropriate
for the use and location. Provide all items complete with covers and accessories
required for the intended use. Provide gaskets for units in damp or wet locations.
2.03 MATERIALS AND FINISHES:
A. Sheet steel: flat-rolled, code-gage, galvanized steel to applicable standards.
B. Fasteners for General Use: corrosion resistant screws and hardware including
cadmium and zinc plated items.
C. Fasteners for Damp or Wet Locations: stainless steel screws and hardware.
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D. Cast Metal for Boxes, Enclosures, and covers, copper-free aluminum except as
otherwise specified.
E. Exterior Finish: baked enamel, (gray or beige as selected by the
Architect/Engineer), for items exposed in finished locations except as otherwise
indicated.
F. Painted Interior Finish: where not indicated, white baked enamel.
G. Fittings for Boxes, Cabinets, and Enclosures: malleable iron or zinc plated steel
for conduit hubs, bushings and box connecters, conformant with respective
standards applicable (conduit standards applicable or approved, in host country
for use with appropriate device outlets).
2.04 METAL OUTLET, DEVICE AND SMALL WIRING BOXES:
A. General: electrical metallic outlet boxes and fittings shall be of type, shape, size,
and depth compatible with location and application. Refer to Section “Wiring
Devices” of Division 16.
B. Steel Boxes: shall be sheet steel with stamped knockouts, threaded hubs covers
and accessories suitable for each location including mounting brackets and straps,
cable clamps, exterior rings and fixture studs, conforming with the approved
standards of this project.
2.05 NONMETALLIC OUTLET, DEVICE AND SMALL WIRING BOXES:
A. General: conform to approved standard for “ Nonmetallic Outlet Boxes, Device
Boxes, Covers and Box Supports” and “Nonmetallic Outlet Boxes, Flush Device
Boxes and Covers”. Boxes shall be moulded PVC units of type, shape, size, and
depth to suit location and application. Refer to Section “Wiring Devices” of
division 16.
B. Boxes for Concealed Work: mounting provisions and wiring entrances to suit
installation conditions and wiring method used.
C. Boxes for Exposed Work: ultra-violet stabilized, nonconductive, high impact
resistant boxes with integrally moded raceway entrance hubs and removable
mounting flanges. Boxes shall be equipped with threaded metallic inserts for
device and cover plate mounting screws. Each box shall have a molded cover of
matching PVC material suitable for the application. Provide gasket of PVC or
neoprene for outdoor or wet locations.
2.06 PULL AND JUNCTION BOXES:
A. General: comply with applicable project standards, and code of practice, for boxes
over 1500 CU.cm volume. Boxes shall have screwed or bolted-on covers of
material same as box and shall be of size and shape to suit application.
B. Hot-Dipped Galvanized Steel Boxes: sheet steel with welded seams. Where
necessary to provide a rigid assembly, construct with internal structural steel
bracing. Hot-dip galvanized after fabrication. Cover shall be gasketed.
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C. Cast Nonmetallic ultra-violet stabilized, nonconductive, high impact resistant
PVC boxes with gasketed cover and integral mounting flanges.
D. Junction Boxes under raised floor shall be I.P. 44 galvanized steel, equipped with
terminal blocks.
2.07 CABINETS:
A. Comply with approved applicable standards for this project.
B. Construction: sheet steel IP30 to IEC 144 except as otherwise indicated cabinet
shall consist of a box and a front consisting of a one piece frame and a hinged
door. Arrange door to close against a rabbet placed all around the inside edge of
the frame, with a uniformly close fit between door and frame. Provide concealed
fasteners, not over 600 mm (24-inches) apart, to hold fronts to cabinet boxes and
provide for adjustment. Provide flush or concealed door hinges not over 600
mm(24-inches) apart and not over 150mm (6-inches) from top and bottom of
door. For flush cabinets, make the front approximately 19mm (3/4 inch) larger
than the box all around. For surface mounted cabinets make front same height
and width as box.
C. Doors: double doors for cabinets wider than 600mm (24-inches). Telephone
cabinets wider than 1200mm (48-inches) may have double flap or sliding doors.
Removable doors will only be accepted if approved.
D. Locks: combination spring catch and key lock, with all locks for cabinets of the
same system keyed alike. Locks may be omitted on signal, power, and lighting
cabinets located within electrical closets and mechanical-electrical rooms. Locks
shall be of a type to permit doors to latch closed without locking.
2.08 STEEL ENCLOSURES WITH HINGED DOORS:
A. Comply with IEC 439.
B. Construction: sheet steel, 1.5mm (16 gage), minimum, with continuous welded
seams. Protection class as indicated, arranged for surface mounting.
C. Doors: hinged directly to cabinet and removable, with approximately 19mm (3/4-
inch) flange around all edges, shaped to cover edge of box. Provide handle
operated, key locking latch. Individual door width shall be no greater than 24-
inches provide multiple doors where required.
D. Mounting Panel: provide painted removable internal mounting panel for
component installation.
E. Enclosure: IP41 to IEC 144 as otherwise indicated. Where door gasketing is
required, provide neoprene gasket attached with oil-resistant adhesive, and held in
place with steel retaining strips. For all enclosures of class higher than NEMA
1A, use hub bed raceway entrances.
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2.09 CAST METAL ENCLOSURES WITH HINGED DOORS:
A. Copper free aluminum with bolted, hinged doors. Where used at hazardous
(classified ) locations, enclosures shall conform to applicable standard and shall
be listed and labeled for the classification of hazard involved.
2.10 MOULDED NONMETALLIC ENCLOSURES WITH HINGED DOOR:
A. General: molded, glass fiber reinforced high impact strength polyester with bolt
or screw secured doors and solid neoprene gaskets.
2.11 OUTLET BOXES
A. Outlet Boxes
1. PVC heavy guage for concealed work, and die-cast aluminum for exposed
work boxes of shapes and sizes as required, suitable for installation at
respective location.
2. With mounting holes and with cable and conduit size knockout openings.
3. with threaded screw holes, with corrosion resistant ridged cover and
grounding screws for fastening surface and device type box covers, and for
equipment grounding.
4. For concealed work, utilize 8cm square or octagon outlet boxes, except as
otherwise required by construction devices or wiring and as follows:
a. Above ceiling: 4.0cm deep.
b. In ceiling or slab: 8.0cm deep.
c. In wall for fixtures: 8cm deep
d. In wall for receptacles and switches: 4.0cm deep.
e. With raised covers and fixture studs where required.
f. Back-to-back boxes type not permitted.
g. For installation of more than two devices in a common outlet box, utilize
boxes and device rings manufactured specifically for this purpose.
h. Outlet box device rings used to be of sufficient depth so as to make the
use of extension boxes and rings unnecessary.
5. For exposed work utilize 8cm round x 5cm deep for mounting on ceilings and
on walls, except as otherwise required by construction.
6. Provide blank covers for outlet boxes without devices. Covers to match
adjacent plates.
2.12 FLOOR BOXES
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A. Material : Galvanized steal corrosion-resistant finish with 2.5mm2 earthing pigtail
prewired to the ground screw, with knock outs for conduit entrance and suitable
to accept conduit and devices as indicated.
B. Covers: Brass suitable for indicated devices and mounting.
C. Flanges: brass and suitable for floor box.
2.13 UNDER RAISED FLOOR INSTALLATION:
- A galvanized sheet steel cable tray/trunking grid installed above the floor slab
shall cover the whole working area for each floor.
- A galvanized steel junction boxes equipped with terminal boxes, and fixed above
the concrete slab under the raised floor tiles will be provided for normal and UPS
sockets branch circuit wiring.
- Two junction boxes will be installed for each connected working stations group,
one for power sockets and the other for ups sockets.
- All branch circuit wiring for work stations socket outlets will be of a multicore
cables 4mm2 PVC/PVC insulated.
- A through-wiring Circular Floor Access Unit shall be provided as a simple access
to the floor void, which will give more flexibility for workstations re-arrangement.
- Cables concerning each connected work stations group will be drawn out from the
raised floor tiles through the Through-Wiring Circular Floor Access Unit &
enclosed inside a cable spine up to the cable management system under the work
stations.
PART 3 - EXECUTION
3.01 INSTALLATION, GENERAL:
A. Locations: install items where indicated and where required to suit code
requirements and installation conditions.
B. Cap unused knockout holes where blanks have been removed and plug unused
conduit hubs
C. Support and fasten items securely in accordance with Division 16 Section
“Supporting Devices”.
D. Sizes shall be adequate to meet Code or Regulation Requirements, but in no case
smaller than sizes indicated.
E. Remove sharp edges where they may come in contact with wiring or personnel.
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3.02 APPLICATIONS:
A. Cabinets, Indoors, Flush mouned: IP30 to IEC 144 or except as otherwise
indicated.
B. Hinged Door Enclosures, Indoors IP51 to IEC 144 or enclosure except as
otherwise indicated.
C. Hinged Door Enclosures Outdoors: IP54 to IEC 144 or with drip hood, factory
tailored to individual units.
D. Outlet Boxes and Fittings: install outlet and device boxes and associated covers
and fittings of materials and types suitable for each location and in conformance
with the following requirements:
E. Interior Dry Locations: IP30 to IEC 144 or NEMA type 1, sheet steel or
nonmetallic as specified and/or permitted by local code.
F. Wet Locations: IP54 to IEC 144 or NEMA type 4 enclosures.
G. Pull and Junction Boxes: install pull and junction boxes of materials and IEC
types suitable for each location except as otherwise indicated.
3.03 INSTALLATION OF OUTLET BOXES:
A. Outlets at Windows and Doors: Locate close to window trim. For outlets
indicated above doors use 2100 mm mounting height above finished floor and
center outlets above the door opening except as otherwise indicated.
B. Locations in Special Finish Materials: for outlet boxes for receptacles and
switches mounted in desks or furniture cabinets or in glazed tile, concrete block,
marble, brick, stone or wood walls, use rectangular shaped boxes with square
corners and straight sides. Install such boxes without plaster rings. Saw cut all
recesses for outlet boxes in exposed masonry walls.
C. Gasketed Boxes: at the following locations use cast metal, threaded hub type
boxes with gasketed weatherproof covers:
1. Exterior locations.
2. Where surface mounted on unfinished walls, columns or pilasters. (Cover
gaskets may be omitted in dry locations).
3. Where exposed to moisture laden atmosphere.
4. Where indicated.
D. Mounting: mount outlet boxes for switches with the long axis vertical or as
indicated. Mount boxes for receptacles either vertically or horizontally but
consistently either way. Three or more gang boxes shall be mounted with the long
axis horizontal. Locate box covers or device plates so they will not span different
types of building finishes either vertically or horizontally. Locate boxes for
switches near doors on the side opposite the hinges and close to door trim, even
though electrical floor plans may show them on hinge side.
E. For data transmission, telephone pull boxes use metallic steel boxes.
F. Cover Plates For Surface Boxes: use plates sized to box front without overlap.
G. Protect outlet boxes to prevent entrance of plaster, and debris. Thoroughly clean
foreign material from boxes before conductors are installed.
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H. Concrete Boxes: use extra deep boxes to permit side conduit entrance without
interfering with reinforcing, but do not use such boxes with over 150mm (6-inch)
depth.
I. Floor Boxes: install in concrete floor slabs so they are completely enveloped in
concrete except for the top. Where normal slab thickness will not develop box as
specified above, provide increased thickness of the slab. Provide accessories in
the floor boxes with earthing terminal, consisting of a washer in head machine
screw, screwed into a tapped in box. Adjust floor boxes flush with finished floor.
Cover finish is to match floor finish. Details are subject to the Engineer’s
approval.
3.04 INSTALLATION OF PULL AND JUNCTION BOXES:
A. Box Selection: for boxes in main feeder conduit runs, use sizes not smaller than
200mm square by 100mm deep. Do not exceed 6 entering and 6 leaving raceways
in a single box. Quantities of conductors (including equipment grounding
conductors) in pull or junction box shall be in accordance with the applicable
codes and regulations.
B. Cable Supports: install clamps, grids, or devices to which cables may be secured.
Arrange cables so they may be readily identified. Support cable at least every 75
cm (30-inches) inside boxes.
C. Mount pull boxes in inaccessible ceilings with the covers flush with the finished
ceiling.
D. Size: provide pull and junction boxes for telephone, signal and other systems at
least 50 percent larger than would be required by Standard or Regulation, or as
indicated. Locate boxes strategically and provide shapes to permit easy pulling of
future wires or cables of types normal for such systems.
3.05 INSTALLATION OF CABINETS AND HINGED DOOR ENCLOSURES:
A. Mount with fronts straight and plumb.
B. Install with tops 1950mm above floor.
C. Set cabinets in finished spaces flush with walls.
3.06 EARTHING
A. Electrically earth metallic cabinets, boxes, and enclosures. Where wiring to item
includes a grounding conductor, provide a grounding terminal in the interior of
the cabinet, box or enclosure.
3.07 CLEANING AND FINISH REPAIR:
B. Upon completion of installation, inspect components. Remove burrs, dirt,
and construction debris and repair damaged finish including chips,
scratches, abrasions and weld marks.
C. Galvanized Finish: repair damage using matching corrosion inhibiting
touch-up coating.
END OF SECTION 16135