SECTION 16410
ENCLOSED SWITCHES AND CIRCUIT BREAKERS
PART 1 - GENERAL (Not Applicable)
PART 2 - PRODUCTS
2.1
CIRCUIT BREAKERS
A.
2.2
Enclosed, Molded-Case Circuit Breaker: NEMA AB 1, with lockable handle, standard frame sizes, trip
ratings, and number of poles and thermal-magnetic trip, unless otherwise indicated.
1.
Lugs: Mechanical style suitable for number, size, trip ratings, and material of conductors.
2.
Application Listing: Appropriate for application; Type SWD for switching fluorescent lighting
loads; Type HACR for heating, air-conditioning, and refrigerating equipment.
3.
Ground-Fault Protection: Integrally mounted relay and trip unit with adjustable pickup and timedelay settings, push-to-test feature, and ground-fault indicator.
SAFETY SWITCHES
A.
General: Provide safety switches at all locations indicated on the Drawings, and where required by
code, whether indicated or not.
B.
Safety Switches:
1.
Provide heavy-duty safety switches for all 3-phase and single phase, 480-volt and all 3-phase,
208-volt applications.
2.
Provide general-duty safety switches for all single phase 120-volt and 208/240-volt applications.
3.
Safety switches protecting motor feeders shall be "horsepower rated."
4.
Safety switches shall have voltage rating suitable for their applications. Switches shall be either
fused or non-fused with the number of poles indicated on the Drawings.
5.
Safety switches fed by four conductors shall be supplied with solid neutral block
6.
All safety switches shall have provisions for padlocking
C.
Enclosures:
1.
Provide NEMA Type 1 enclosures for normally dry locations and NEMA Type 3R enclosure for
normally wet locations. All enclosures shall have provisions for padlocking operating handle in
the open position.
2.
Provide baked-on gray lacquer or enamel finish on all enclosures
3.
Provide black phenolic nameplates with engraved white letters not less than 3/8-inch high block
style on doors to identify item controlled.
PART 3 - EXECUTION
3.1
TESTING
A.
Perform visual and mechanical inspections and electrical tests stated in NETA ATS.
END OF SECTION 16410
WASO-HPTC-Thomas Farm (Araby) House - Systems Upgrade
Monocacy National Battlefield
PMIS No. 98439
December 31, 2009
Final Construction Document Submission
16410 - 1
Enclosed Switches and Circuit Breakers