SECTION 262817-ENCLOSED CIRCUIT BREAKERS
PART 1 GENERAL
1.1
SUMMARY
A.
1.2
1.3
1.4
1.5
REFERENCES AND QUALITY ASSURANCE
A.
NECA (National Electrical Contractors Association) - Standard of Installation.
B.
NEMA AB 1 (National Electrical Manufacturers Association)- Molded Case Circuit Breakers.
C.
NETA ATS (International Electrical Testing Association) - Acceptance Testing Specifications for
Electrical Power Distribution Equipment and Systems (International Electrical Testing
Association).
D.
UL 489
E.
NFPA 70
SUBMITTALS
A.
Section 013300 - Submittal Procedures: Submittal procedures.
B.
Product Data: Submit catalog sheets showing ratings, trip units, time current curves, dimensions,
and enclosure details.
CLOSEOUT SUBMITTALS
A.
Section 017700 - Closeout procedures.
B.
Project Record Documents: Record actual locations and continuous current ratings of enclosed
circuit breakers.
QUALIFICATIONS
A.
1.6
Section includes molded-case and insulated-case circuit breakers in individual enclosures.
Manufacturer: Company specializing in manufacturing products specified in this section with
minimum three years experience.
QUALITY ASSURANCE
A.
Perform Work in accordance with the National Electric Code and the Ohio Building
UL 489, NEMA AB 1, and all other codes and ordinances.
1510
ENCLOSED CIRCUIT BREAKERS
Code,
262817 – 1
PART 2 PRODUCTS
2.1
1510
MOLDED CASE CIRCUIT BREAKER
A.
Manufacturers:
1.
Square “D”.
2.
General Electric.
3.
Cutler Hammer
4.
Siemens
B.
Product Description: Enclosed, molded-case circuit breaker conforming to NEMA AB 1, suitable
for use as service entrance equipment where applied.
C.
Service Conditions:
1.
Temperature: 110 degrees F.
2.
Altitude: 1,000 feet.
D.
Field-Adjustable Trip Circuit Breaker: Circuit breakers with frame sizes 200 amperes and larger
have mechanism for adjusting long time, short time, continuous current setting for automatic
operation. Range of Adjustment: amperes.
E.
Field-Changeable Ampere Rating Circuit Breaker: Circuit breakers with frame sizes 200 amperes
and larger have changeable trip units.
F.
Current Limiting Circuit Breaker:
Circuit breaker indicated as current-limiting have
automatically-resetting current limiting elements in each pole. Let-through Current and Energy:
Less than permitted for same size Class RK-5 fuse.
G.
Solid-State Circuit Breaker: Electronic sensing, timing, and tripping circuits for adjustable current
settings; ground fault trip with integral ground fault sensing; instantaneous trip; and adjustable
short time trip.
H.
Current Limiter: Designed for application with molded case circuit breaker.
1.
Coordinate limiter size with trip rating of circuit breaker to prevent nuisance tripping and
to achieve interrupting current rating specified for circuit breaker.
2.
Interlocks trip circuit breaker and prevent closing circuit breaker when limiter
compartment cover is removed or when one or more limiter is not in place or has
operated.
I.
Accessories: As indicated on Drawings. Conform to NEMA AB 1.
1.
Shunt Trip Device: 120 volts, AC.
2.
Handle Lock: Provisions for padlocking.
3.
Insulated Grounding Lug: In each enclosure.
J.
Enclosure: NEMA AB 1, to meet conditions. Fabricate enclosure from steel finished with
manufacturer's standard gray enamel.
1.
Interior Dry Locations: Type 1.
2.
Exterior Locations: Type 3R.
3.
Industrial Locations: Type 4.
K.
Service Entrance: Switches identified for use as service equipment are to be labeled for this
application. Furnish solid neutral assembly and equipment ground bar.
ENCLOSED CIRCUIT BREAKERS
262817 – 2
PART 3 EXECUTION
3.1
3.2
3.3
INSTALLATION
A.
Install in accordance with NECA "Standard of Installation."
B.
Install enclosed circuit breakers plumb. Provide supports in accordance with Section 260529.
C.
Height: 5 ft to operating handle.
D.
Locate and install engraved plastic nameplates in accordance with Section 260553.
FIELD QUALITY CONTROL
A.
Refer to Division 1 requirements.
B.
Inspect and test in accordance with NETA ATS, except Section 4.
C.
Perform inspections and tests listed in NETA ATS, Section 7.6.1.1.
ADJUSTING
A.
Refer to Division 1 requirements.
B.
Adjust trip settings to coordinate circuit breakers with other overcurrent protective devices in
circuit.
C.
Adjust trip settings to provide adequate protection from overcurrent and fault currents.
END OF SECTION 262817
1510
ENCLOSED CIRCUIT BREAKERS
262817 – 3