1、09-10 26 24 21 - 1 SECTION 26 24 21 MOTOR-CONTROL PANELBOARDS SPEC WRITE NOTE: Delete between /_/if not applicable to project. Also delete any other item or paragraph not applicable to the selection and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION This section specifies the furnishing,
2、installation, and connection of motor control panelboards. 1.2 RELATED WORK /A. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS: Requirements for seismic restraint of nonstructural components. / B. Section 25 10 10, ADVANCED UTILITY METERING: Requirements for electrica
3、l metering. C. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: General electrical requirements and items that are common to more than one section of Division 26. D. Section 26 05 21, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES (600 VOLTS AND BELOW): Cables and wiring. E. Section
4、26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS: Requirements for personnel safety and to provide a low impedance path for possible ground fault currents. F. Section 26 05 33, RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS: Conduits and outlet boxes. /G. Section 26 05 71, ELECTRICAL SYSTEM PROTECTI
5、VE DEVICE STUDY: Coordination and short circuit study for overcurrent protective devices. / H. Section 26 29 11, LOW-VOLTAGE MOTOR STARTERS: Control and protection of motors. 1.3 QUALITY ASSURANCE Refer to Paragraph, QUALIFICATIONS, in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. 1.4
6、 SUBMITTALS A. Submit in accordance with Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS. B. Shop Drawings: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 24 21 - 2 1. Clearly present sufficient information, including descriptiv
7、e cuts, to determine compliance with drawings and specifications. 2. Include electrical ratings, dimensions, weights, mounting details and materials, running overcurrent protection, branch circuit overcurrent protection, wiring diagrams, and accessories. 3. Complete nameplate data including manufact
8、urers name and catalog number. C. Manuals: 1. When submitting the shop drawings, submit companion copies of complete maintenance and operating manuals, including technical data sheets, wiring diagrams, and information for ordering replacement parts. D. Factory Tests: Submit six copies of manufacture
9、rs routine factory test procedures and production line tests for all motor control panelboards to the /Resident Engineer/ /COTR/. E. Test Reports: 1. Submit six complete copies of the factory inspection and test results in booklet form, including all plotted data curves, all test conditions, and a l
10、isting of test equipment complete with calibration certifications and all measurements taken. F. Certifications: Two weeks prior to the final inspection, submit four copies of the following the /Resident Engineer/ /COTR/: 1. Certification by the manufacturer that the panelboards conform to the requi
11、rements of the drawings and specifications. 2. Certification that the equipment has been properly installed, adjusted, and tested. 1.5 APPLICABLE PUBLICATIONS A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the ext
12、ent referenced. Publications are referenced in the text by designation only. B. National Electrical Contracting Association (NECA) NEIS 407-02 Recommended Practice for Installing and Monitoring Panelboards C. National Electrical Manufacturers Association (NEMA): 250-08 . Enclosure for Electrical equ
13、ipment (1000 Volts Maximum) FU 1-02 Low-Voltage Cartridge Fuses Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 24 21 - 3 ICS l-05 . Industrial Control and Systems General Requirements ICS 2-05 . Industrial Control and Systems Controllers, C
14、ontactors, and Overload Relays Rated 600 Volts ICS 4-05 . Industrial Control and Systems: Terminal Blocks ICS 6-06 . Industrial Control and Systems: Enclosures PB-1-06 Panelboards D. National Fire Protection Association (NFPA): 70-08 National Electrical Code (NEC) 70E-09 . Standard for Electrical Sa
15、fety in the Workplace E. Underwriters Laboratories, Inc. (UL): 50-95 Enclosures for Electrical Equipment 67-09 . Panelboards 489-09 . Molded Case Circuit Breakers and Circuit Breaker Enclosures 508-99 Industrial Control Equipment PART 2 - PRODUCTS 2.1 MOTOR CONTROL PANELBOARD A. General: 1. Motor co
16、ntrol panelboards shall be in accordance with UL 67, NEMA, NECA, and as shown on the drawings. 2. Motor control panelboards shall be complete, metal-enclosed, grounded type panelboard and cabinet assemblies. 3. Ratings: Ratings shall be not less than shown on the drawings. Interrupting ratings shall
17、 be not less than the maximum short circuit currents available at motor control center location as shown on the drawings. 4. Coordinate components of the panelboards and their arrangements electrically and mechanically. The components and the control wiring shall conform to NEMA ICS 1, UL 67, and UL
18、 508. B. Enclosures: Per Section 26 24 16, PANELBOARDS. C. Panelboard Features: 1. Each motor controller individually enclosed in steel with an individual door. 2. Tubs: a. Wiring gutters completely around the panelboards with adequate cross-sections to accommodate both the present and future wires.
19、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 24 21 - 4 b. Cover unused openings with snap-in metal covers. 3. Doors mechanically interlocked to prevent their opening unless the disconnect is open. Incorporate “defeater“ mechanism for ins
20、pection by qualified personnel. 4. External operating handles with lock-open padlocking provisions and ON and OFF position indicators. 5. Bus bars shall be per Section 26 24 16, PANELBOARDS. 6. Terminal blocks shall comply with ICS 4. 7. Completely equipped spaces for future motor controllers. D. Mo
21、tor Controllers: Shall conform to the applicable requirements in Section 26 29 11, LOW-VOLTAGE MOTOR STARTERS. E. Ground fault current interrupting breakers, shunt trip circuit breakers, or other accessory devices or functions shall be provided where indicated. F. Identification: Identify each motor
22、 controller, circuit breaker and switch with a separate nameplate of laminated black phenolic resin with white core and engraved lettering not less than 0.25 in 6 mm high. Identify each motor by its number or other designation and indicate the function fulfilled by the motor. SPEC WRITER NOTE: Edit
23、the paragraph below to conform to project requirements. / 2.2 METERS Meters shall be provided as shown on the plans. Meters shall be in accordance with Section 25 10 10, ADVANCED UTILITY METERING./ 2.3 SURGE SUPPRESSION A. Where shown on drawings, furnish panelboard with integral transient voltage s
24、urge suppression device. Refer to Section 26 43 13, TRANSIENT-VOLTAGE SURGE SUPPRESSION. PART 3 - EXECUTION 3.1 INSTALLATION A. Installation shall be in accordance with NEC, written instructions of the manufacturer, and as shown on the drawings. B. Mount the panelboards such that the top circuit bre
25、aker will not exceed 78 in 1950 mm above the finished floor, except where otherwise shown on the drawings or required to avoid conflicts. Mount panelboards that are too high such that the bottoms of the cabinets will not be less than 6 in 150 mm above the finished floor. Provided by IHSNot for Resal
26、eNo reproduction or networking permitted without license from IHS-,-,-09-10 26 24 21 - 5 C. Locate the cabinets so the present and future conduits can be conveniently connected. D. Ground and bond panelboards as required in Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS. 3.2 IDENTIFI
27、CATION A. Provide one hard copy and an electronic copy of the motor control panelboard schedule to the /Resident Engineer/ /COTR/ at project close-out. B. Install a plastic-laminated copy of the circuit directory on the inner side of the motor control panelboard door. 3.3 ACCEPTANCE CHECKS AND TESTS
28、 Perform in accordance with the manufacturers recommendations. Include the following visual and mechanical inspections and electrical tests: 1. Visual and Mechanical Inspection a. Compare equipment nameplate data with specifications and approved shop drawings. b. Inspect physical, electrical, and me
29、chanical condition. c. Verify appropriate anchorage and required area clearances. d. Verify that fuse, circuit breaker, and starter sizes and types correspond to approved shop drawings. e. Use calibrated torque-wrench method to verify tightness of accessible bolted electrical connections, or perform
30、 thermographic survey after energization. f. Confirm correct operation and sequencing of electrical and mechanical interlock systems. g. Clean motor control panelboards. h. Exercise all active components. i. Verify the correct operation of all sensing devices, alarms, and indicating devices. j. If a
31、pplicable, inspect control power transformers. 2. Electrical Tests a. Perform insulation-resistance tests on each bus section. b. Perform overpotential tests. c. Perform insulation-resistance test on control wiring; do not perform this test on wiring connected to solid-state components. Provided by
32、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-10 26 24 21 - 6 3.4 FOLLOW-UP VERIFICATION Upon completion of acceptance checks, settings, and tests, the contractor shall demonstrate that the motor control panelboard is in good operating condition and properly performing the intended function. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
