SECTION 262816 – ENCLOSED SWITCHES AND CIRCUIT BREAKERS
PART 1
1.1
1.5
Product Data: For each product specified including disconnect switches, enclosed circuit
breakers, fuses, and accessories.
QUALITY ASSURANCE
A.
Source Limitations: Obtain disconnect switches and enclosed circuit breakers from one
source and by a single manufacturer.
B.
Listing and Labeling: Provide products specified in this Section that are listed and
labeled. The Terms "Listed" and "Labeled" shall be as defined in the NFPA 70,
Article 100, by a testing agency acceptable to the authorities having jurisdiction and
marked for the intended use.
C.
Standards: Comply with applicable NEMA and UL Standards.
COORDINATION
A.
PART 2
2.1
This Section includes individually mounted safety switches and enclosed circuit breakers
used for the service disconnect switches, feeder and equipment disconnect switches,
feeder and branch-circuit protection, and motor disconnect switches.
SUBMITTALS
A.
1.4
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections apply to this Section.
SUMMARY
A.
1.3
GENERAL
RELATED DOCUMENTS
A.
1.2
262816/1
Coordinate layout and installation of safety switches, enclosed circuit breakers, and
components with other construction that penetrates walls or is supported by them,
including electrical and other types of equipment, raceways, piping, and encumbrances to
workspace clearance requirements.
PRODUCTS
MANUFACTURERS
A.
Manufacturers: Subject to compliance with requirements, provide disconnect switches
and fuses by one of the following:
1.
Fusible Switches:
a.
Eaton Corp.; Cutler-Hammer Products.
b.
General Electric Co.; Electrical Distribution and Control Division.
c.
Siemens Energy & Automation, Inc.
d.
Square D Corp.; Groupe Schneider
FRED HAAS TOYOTA WORLD
JJA, INC. PROJECT NO. 3916037.010
SECTION 262816 – ENCLOSED SWITCHES AND CIRCUIT BREAKERS
2.
3.
2.2
2.3
2.4
262816/2
Fuses:
a.
Bussmann
b.
Gould-Shawmut
c.
Littlefuse
Enclosed Circuit Breakers:
a.
Eaton Corp.; Cutler-Hammer Products
b.
General Electric Co.; Electrical Distribution and Control Division.
c.
Siemens Energy & Automation, Inc.
d.
Square D Corp.; Groupe Schneider
DISCONNECT SWITCHES
A.
Enclosed, Fusible Switch: NEMA Type HD clips to accommodate specified fuses,
enclosure consistent with environment where located.
B.
Disconnect Switch Features and Accessories: Standard frame sizes, trip ratings, and
number of poles.
1.
Handle: Lockable with two padlocks and interlocked with cover in CLOSED
position.
2.
Lugs: Mechanical style suitable for number, size, trip ratings, and material of
conductors.
FUSES
A.
Motor and Transformer Branch Circuits: Class RK1, time delay.
B.
Other Branch Circuits: Class RK5, non-time delay.
ENCLOSED CIRCUIT BREAKERS
A.
Molded-Case Circuit Breaker: NEMA AB 1 with interrupting capacity to meet available
fault currents and lockable with two padlocks. Molded-case circuit breakers shall be
thermal-magnetic with inverse time-current element for low-level overloads, and
instantaneous magnetic trip element for short circuits. Adjustable magnetic trip setting
for circuit-breaker frame sizes 200 amperes and larger.
B.
Molded-Case Circuit Breaker Features and Accessories: Standard frame sizes, trip
ratings, and number of poles.
1.
Lugs: Mechanical style suitable for number, size, trip ratings, and material of
conductors.
2.
Shunt Trip: 120 V trip coil energized from separate circuit.
3.
Auxiliary Switch: One single-pole-double-throw (SPDT) switch with “a” and “b”
contacts; “a” contacts mimic circuit breaker contacts, “b” contacts operate in
reverse of circuit breaker contacts.
FRED HAAS TOYOTA WORLD
JJA, INC. PROJECT NO. 3916037.010
SECTION 262816 – ENCLOSED SWITCHES AND CIRCUIT BREAKERS
2.5
ENCLOSURES
A.
PART 3
3.1
3.2
Applicable NEMA standards to meet environmental conditions of installed location.
1.
Indoor Locations: NEMA, Type 1
2.
Outdoor Locations: NEMA, Type 3R.
3.
Other Wet or Damp Indoor Locations: NEMA, Type 4.
4.
Hazardous Areas: NEMA, Type suitable for the Division, Class, and Group of
the hazardous environment.
EXECUTION
INSTALLATION
A.
Install disconnect switches and circuit breakers level and plumb in locations as indicated,
according to manufacturer's written instructions, and with proper working clearances.
B.
Connect disconnect switches circuit breakers, and components to wiring system and to
ground as indicated and instructed by manufacturer. Tighten electrical connectors and
terminals according to manufacturer's published torque-tightening values. Where
manufacturer's torque values are not indicated, use those specified in applicable UL
Standards.
C.
Identify each disconnect switch or enclosed circuit breaker according to requirements
specified in other Division 26 Specification Sections.
D.
Install fuses in fusible devices as indicated. Arrange fuses so fuse ratings are readable
without removing fuse.
E.
Install typewritten labels on the inside door of each fused switch to indicate fuse
replacement information including fuse classification, ampacity, and manufacturer’s part
number.
CLEANING
A.
3.3
262816/3
After completing system installation, including outlet fittings and devices, inspect
exposed finish. Remove burrs, dirt, and construction debris and repair damaged finish
including chips, scratches, and abrasions.
ACCESSORIES
A.
Spare Fuses: Furnish quantity equal to 20 percent of each fuse type and size installed, but
not less than 1 set of 3 of each type and size.
B.
Cabinet: Wall-mounted, 0.05-inch thick steel unit with full-length, recessed piano-hinged
door with key-coded cam lock and pull.
1.
Size: Adequate for orderly storage of spare fuses specified with 15 percent spare
capacity minimum.
2.
Finish: Gray, baked enamel.
FRED HAAS TOYOTA WORLD
JJA, INC. PROJECT NO. 3916037.010
SECTION 262816 – ENCLOSED SWITCHES AND CIRCUIT BREAKERS
C.
262816/4
3.
Identification: Stencil legend "SPARE FUSES" in 1-1/2-inch letters on door.
4.
Fuse Pullers: For each size fuse.
Chart: Furnish a fuse chart affixed to the inside of the spare fuse cabinet indicating the
fuse classification, ampacity, and manufacturer’s part number of the fusing for each piece
of equipment.
END OF SECTION 262816
FRED HAAS TOYOTA WORLD
JJA, INC. PROJECT NO. 3916037.010