HomeMy WebLinkAbout16410.pdf BICKFORD OF CARMEL, IN 12/12/2012
ENCLOSED SWITCHES AND CIRCUIT BREAKERS 16410 - 1
SECTION 16410 - ENCLOSED SWITCHES AND CIRCUIT BREAKERS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and other Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section includes the following individually mounted, enclosed switches and circuit
breakers:
1. Fusible switches.
2. Nonfusible switches.
3. Molded-case circuit breakers.
4. Enclosures.
1.3 DEFINITIONS
A. GD: General duty.
B. GFCI: Ground-fault circuit interrupter.
C. HD: Heavy duty.
D. RMS: Root mean square.
E. SPDT: Single pole, double throw.
1.4 SUBMITTALS
A. Product Data: For each type of enclosed switch, circuit breaker, accessory, and component
indicated. Include dimensioned elevations, sections, weights, and manufacturers' technical data
on features, performance, electrical characteristics, ratings, and finishes.
1. Enclosure types and details for types other than NEMA 250, Type 1.
2. Current and voltage ratings.
3. Short-circuit current rating.
4. UL listing for series rating of installed devices.
5. Features, characteristics, ratings, and factory settings of individual overcurrent protective
devices and auxiliary components.
B. Shop Drawings: Diagram power, signal, and control wiring.
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C. Qualification Data: For testing agency.
D. Field quality-control test reports including the following:
1. Test procedures used.
2. Test results that comply with requirements.
3. Results of failed tests and corrective action taken to achieve test results that comply with
requirements.
E. Manufacturer's field service report.
F. Operation and Maintenance Data: For enclosed switches and circuit breakers to include in
emergency, operation, and maintenance manuals. In addition to items specified in Division 1
Section include the following:
1. Manufacturer's written instructions for testing and adjusting enclosed switches and circuit
breakers.
2. Time-current curves, including selectable ranges for each type of circuit breaker.
1.5 QUALITY ASSURANCE
A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70,
Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for
intended use.
B. Comply with NFPA 70.
C. Product Selection for Restricted Space: Drawings indicate maximum dimensions for enclosed
switches and circuit breakers, including clearances between enclosures, and adjacent surfaces
and other items. Comply with indicated maximum dimensions.
1.6 PROJECT CONDITIONS
A. Environmental Limitations: Rate equipment for continuous operation under the following
conditions, unless otherwise indicated:
1. Ambient Temperature: Not less than minus 22 deg F and not exceeding 104 deg F.
2. Altitude: Not exceeding 6600 feet.
1.7 COORDINATION
A. Coordinate layout and installation of switches, circuit breakers, and components with other
construction, including conduit, piping, equipment, and adjacent surfaces. Maintain required
workspace clearances and required clearances for equipment access doors and panels.
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PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. In other Part 2 articles where titles below introduce lists, the following requirements apply to
product selection:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the
manufacturers specified.
2.2 FUSIBLE AND NONFUSIBLE SWITCHES
A. Manufacturers:
1. Square D/Group Schneider.
B. Fusible Switch, 600 A and Smaller: NEMA KS 1, Type HD, with clips or bolt pads to
accommodate specified fuses, lockable handle with capability to accept two padlocks, and
interlocked with cover in closed position.
C. Nonfusible Switch, 600 A and Smaller: NEMA KS 1, Type HD, lockable handle with
capability to accept two padlocks, and interlocked with cover in closed position.
D. Accessories:
1. Equipment Ground Kit: Internally mounted and labeled for copper and aluminum ground
conductors.
2. Neutral Kit: Internally mounted; insulated, capable of being grounded, and bonded; and
labeled for copper and aluminum neutral conductors.
3. Auxiliary Contact Kit: Auxiliary set of contacts arranged to open before switch blades
open.
2.3 MOLDED-CASE CIRCUIT BREAKERS AND SWITCHES
A. Manufacturers:
1. Square D/Group Schneider.
B. Molded-Case Circuit Breaker: NEMA AB 1, with interrupting capacity to meet available fault
currents.
1. Thermal-Magnetic Circuit Breakers: 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 250 A and larger.
2. Adjustable Instantaneous-Trip Circuit Breakers: Magnetic trip element with front-
mounted, field-adjustable trip setting.
3. Electronic Trip-Unit Circuit Breakers: RMS sensing; field-replaceable rating plug; with
the following field-adjustable settings:
a. Instantaneous trip.
b. Long- and short-time pickup levels.
c. Long- and short-time time adjustments.
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d. Ground-fault pickup level, time delay, and I2t response.
4. Current-Limiting Circuit Breakers: Frame sizes 400 A and smaller and let-through
ratings less than NEMA FU 1, RK-5.
5. Integrally Fused Circuit Breakers: Thermal-magnetic trip element with integral limiter-
style fuse listed for use with circuit breaker and trip activation on fuse opening or on
opening of fuse compartment door.
6. GFCI Circuit Breakers: Single- and two-pole configurations with [5] [30]-mA trip
sensitivity.
C. Molded-Case Circuit-Breaker Features and Accessories:
1. Standard frame sizes, trip ratings, and number of poles.
2. Lugs: Mechanical style suitable for number, size, trip ratings, and conductor material.
3. Application Listing: Type SWD for switching fluorescent lighting loads; Type HACR
for heating, air-conditioning, and refrigerating equipment.
4. Ground-Fault Protection: Integrally mounted relay and trip unit with adjustable pickup
and time-delay settings, push-to-test feature, and ground-fault indicator.
5. Shunt Trip: 120-V trip coil energized from separate circuit, set to trip at 55 percent of
rated voltage.
6. Undervoltage Trip: Set to operate at 35 to 75 percent of rated voltage time delay.
7. Auxiliary Switch: Two SPDT switches with "a" and "b" contacts; "a" contacts mimic
circuit-breaker contacts, "b" contacts operate in reverse of circuit-breaker contacts.
8. Key Interlock Kit: Externally mounted to prohibit circuit-breaker operation; key shall be
removable only when circuit breaker is in off position.
9. Zone-Selective Interlocking: Integral with electronic trip unit; for interlocking ground-
fault protection function.
2.4 ENCLOSURES
A. NEMA AB 1 and NEMA KS 1 to meet environmental conditions of installed location.
1. Outdoor Locations: NEMA 250, Type 3R.
2. Other Wet or Damp Indoor Locations: NEMA 250, Type 4.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine elements and surfaces to receive enclosed switches and circuit breakers for compliance
with installation tolerances and other conditions affecting performance.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 INSTALLATION
A. Comply with applicable portions of NECA 1, NEMA PB 1.1, and NEMA PB 2.1 for installation
of enclosed switches and circuit breakers.
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B. Mount individual wall-mounting switches and circuit breakers with tops at uniform height,
unless otherwise indicated. Anchor floor-mounting switches to concrete base.
C. Temporary Lifting Provisions: Remove temporary lifting eyes, channels, and brackets and
temporary blocking of moving parts from enclosures and components.
3.3 IDENTIFICATION
A. Identify field-installed conductors, interconnecting wiring, and components; provide warning
signs.
B. Enclosure Nameplates: Label each enclosure with engraved metal or laminated-plastic
nameplate.
3.4 ADJUSTING
A. Set field-adjustable switches and circuit-breaker trip ranges.
3.5 CLEANING
A. On completion of installation, vacuum dirt and debris from interiors; do not use compressed air
to assist in cleaning.
B. Inspect exposed surfaces and repair damaged finishes.
END OF SECTION 16410