VA 28 05 28 33-2011 CONDUITS AND BACKBOXES FOR ELECTRONIC SAFETY AND SECURITY.pdf

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1、09-11 28 05 28.33 - 1 SECTION 28 05 28.33 CONDUITS AND BACKBOXES FOR ELECTRONIC SAFETY AND SECURITY SPEC WRITER NOTE: Delete between /_/if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION A.

2、 This section specifies the finishing, installation, connection, testing certification of the conduit, fittings, and boxes to form a complete, coordinated, raceway system(s). Conduits and when approved separate UL Certified and Listed partitioned telecommunications raceways are required for a fully

3、functional Electronic Safety and Security (ESS) system. Raceways are required for all electronic safety and security cabling unless shown or specified otherwise. B. Definitions: The term conduit, as used in this specification, shall mean any or all of the raceway types specified. 1.2 RELATED WORK SP

4、EC WRITER NOTE: Delete any item or paragraph not applicable in the section and renumber the paragraphs. A. Section 01 00 00 - GENERAL REQUIREMENTS. For General Requirements. B. Section 06 10 00 - ROUGH CARPENTRY. Requirements for mounting board for communication closets. C. Section 07 84 00 - FIREST

5、OPPING. Requirements for sealing around penetrations to maintain the integrity of fire rated construction. D. Section 07 60 00 - FLASHING AND SHEET METAL. Requirements for fabrications for the deflection of water away from the building envelope at penetrations. E. Section 07 92 00 - JOINT SEALANTS.

6、Requirements for sealing around conduit penetrations through the building envelope to prevent moisture migration into the building. F. Section 09 91 00 - PAINTING. Requirements for identification and painting of conduit and other devices. G. Section 28 05 00 - COMMON WORK RESULTS FOR ELECTRONIC SAFE

7、TY AND SECURITY. For general electrical requirements, general arrangement of the contract documents, coordination, quality assurance, project conditions, equipment and materials, and items that is common to more than one section of Division 28. H. Section 28 05 26 - GROUNDING AND BONDING FOR ELECTRO

8、NIC SAFETY AND SECURITY. Requirements for personnel safety and to provide a low impedance path for possible ground fault currents. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 28 05 28.33 - 2 I. Section 28 08 00 - COMMISIONING OF ELECTRONIC

9、SAFETY AND SECURITY SYSTEMS. Requirements for commissioning - systems readiness checklists, and training. J. Section 31 20 00 - EARTH MOVING. For bedding of conduits. 1.3 DEFINITIONS SPEC WRITER NOTE: Retain abbreviations that remain after this Section has been edited. A. EMT: Electrical metallic tu

10、bing. B. ENT: Electrical nonmetallic tubing. C. EPDM: Ethylene-propylene-diene terpolymer rubber. D. FMC: Flexible metal conduit. E. IMC: Intermediate metal conduit. F. LFMC: Liquidtight flexible metal conduit. G. LFNC: Liquidtight flexible nonmetallic conduit. H. NBR: Acrylonitrile-butadiene rubber

11、. I. RNC: Rigid nonmetallic conduit. 1.4 QUALITY ASSURANCE A. Refer to Paragraph 1.4 Quality Assurance, in Section 28 05 00, COMMON WORK RESULTS FOR ELECTRONIC SAFETY AND SECURITY. 1.5 SUBMITTALS A. Submit in accordance with Section 28 05 00, COMMON WORK RESULTS FOR ELECTRONIC SAFETY AND SECURITY an

12、d Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. Furnish the following: B. Shop Drawings: 1. Size and location of main feeders; 2. Size and location of panels and pull boxes 3. Layout of required conduit penetrations through structural elements. 4. The specific item proposed and its are

13、a of application shall be identified on the catalog cuts. C. Certification: Prior to final inspection, deliver to the Resident Engineer/COTR four copies of the certification that the material is in accordance with the drawings and specifications and has been properly installed. D. Completed System R

14、eadiness Checklists provided by the Commissioning Agent and completed by the contractor, signed by a qualified technician and dated on the date of completion, in accordance with the requirements of Section 28 08 00 COMMISSIONING OF ELECTRONIC SAFETY AND SECURITY SYSTEMS. E. Product Data: For surface

15、 raceways, wireways and fittings, floor boxes, hinged-cover enclosures, and cabinets. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 28 05 28.33 - 3 F. Shop Drawings: For the following raceway components. Include plans, elevations, sections, d

16、etails, and attachments to other work. SPEC WRITER NOTE: Retain subparagraph below for custom enclosures only. 1. Custom enclosures and cabinets. SPEC WRITER NOTE: Retain subparagraph and associated subparagraphs below if handholes or boxes for underground wiring are specified. 2. Handholes and boxe

17、s for underground wiring, including the following: a. Duct entry provisions, including locations and duct sizes. b. Frame and cover design. c. Grounding details. d. Dimensioned locations of cable rack inserts, and pulling-in and lifting irons. e. Joint details. SPEC WRITER NOTE: Retain paragraph and

18、 subparagraphs below if Drawings do not include detailed conduit routing plans and if Project involves unusual coordination requirements. G. Coordination Drawings: Conduit routing plans, drawn to scale, on which the following items are shown and coordinated with each other, based on input from insta

19、llers of the items involved: 1. Structural members in the paths of conduit groups with common supports. 2. HVAC and plumbing items and architectural features in the paths of conduit groups with common supports. SPEC WRITER NOTE: Retain paragraph and subparagraphs below if required by seismic criteri

20、a applicable to Project. Coordinate with Division 16 Section “Electrical Supports and Seismic Restraints.“ H. Manufacturer Seismic Qualification Certification: Submit certification that enclosures and cabinets and their mounting provisions, including those for internal components, will withstand sei

21、smic forces defined in Division 16 Section “Electrical Supports and Seismic Restraints.“ Include the following: 1. Basis for Certification: Indicate whether withstand certification is based on actual test of assembled components or on calculation. SPEC WRITER NOTE: Retain option in first subparagrap

22、h below for essential facilities where equipment must operate immediately after an earthquake. a. The term “withstand“ means “the cabinet or enclosure will remain in place without separation of any parts when subjected to the seismic forces specified and the unit will retain its enclosure Provided b

23、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 28 05 28.33 - 4 characteristics, including its interior accessibility, after the seismic event.“ 2. Dimensioned Outline Drawings of Equipment Unit: Identify center of gravity and locate and describe mountin

24、g and anchorage provisions. 3. Detailed description of equipment anchorage devices on which the certification is based and their installation requirements. I. Source quality-control test reports. 1.6 APPLICABLE PUBLICATIONS A. Publications listed below (including amendments, addenda, revisions, supp

25、lements and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only. B. National Electrical Manufacturers Association (NEMA): TC-3-04 PVC Fittings for Use with Rigid PVC Conduit and Tubing FB1-07 . Fittings, Cast Metal

26、 Boxes and Conduit Bodies for Conduit, Electrical Metallic Tubing and Cable C. National Fire Protection Association (NFPA): 70-11 National Electrical Code (NEC) D. Underwriters Laboratories, Inc. (UL): 1-05 . Flexible Metal Conduit 5-04 . Surface Metal Raceway and Fittings 6-07 . Rigid Metal Conduit

27、 50-07 Enclosures for Electrical Equipment 360-09 . Liquid-Tight Flexible Steel Conduit 467-07 . Grounding and Bonding Equipment 514A-04 Metallic Outlet Boxes 514B-04 Fittings for Cable and Conduit 514C-02 Nonmetallic Outlet Boxes, Flush-Device Boxes and Covers 651-05 . Schedule 40 and 80 Rigid PVC

28、Conduit 651A-07 Type EB and A Rigid PVC Conduit and HDPE Conduit 797-07 . Electrical Metallic Tubing 1242-06 Intermediate Metal Conduit PART 2 - PRODUCTS 2.1 GENERAL SPEC WRITER NOTE: Coordinate with Section 28 05 13, “CONDUCTORS AND CABLES FOR ELECTRONIC SAFETY AND SECURITY” to insure Provided by I

29、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 28 05 28.33 - 5 that type THW insulation is not specified for use in 20 mm (3/4 inch) conduit. A. Conduit Size: In accordance with the NEC, but not less than 20 mm (3/4 inch) unless otherwise shown. 2.2.CONDUI

30、T A. Rigid galvanized steel: Shall Conform to UL 6, ANSI C80.1. B. Rigid aluminum: Shall Conform to UL 6A, ANSI C80.5. C. Rigid intermediate steel conduit (IMC): Shall Conform to UL 1242, ANSI C80.6. D. Electrical metallic tubing (EMT): Shall Conform to UL 797, ANSI C80.3. Maximum size not to exceed

31、 105 mm (4 inches) and shall be permitted only with cable rated 600 volts or less. E. Flexible galvanized steel conduit: Shall Conform to UL 1. F. Liquid-tight flexible metal conduit: Shall Conform to UL 360. G. Direct burial plastic conduit: Shall conform to UL 651 and UL 651A, heavy wall PVC or hi

32、gh density polyethylene (PE). 2.3.WIREWAYS AND RACEWAYS A. Surface metal raceway: Shall Conform to UL 5. 2.4.CONDUIT FITTINGS A. Rigid steel and IMC conduit fittings: 1. Fittings shall meet the requirements of UL 514B and ANSI/ NEMA FB1. 2. Standard threaded couplings, locknuts, bushings, and elbows

33、: Only steel or malleable iron materials are acceptable. Integral retractable type IMC couplings are also acceptable. 3. Locknuts: Bonding type with sharp edges for digging into the metal wall of an enclosure. 4. Bushings: Metallic insulating type, consisting of an insulating insert molded or locked

34、 into the metallic body of the fitting. Bushings made entirely of metal or nonmetallic material are not permitted. 5. Erickson (union-type) and set screw type couplings: Approved for use in concrete are permitted for use to complete a conduit run where conduit is installed in concrete. Use set screw

35、s of case hardened steel with hex head and cup point to firmly seat in conduit wall for positive ground. Tightening of set screws with pliers is prohibited. 6. Sealing fittings: Threaded cast iron type. Use continuous drain type sealing fittings to prevent passage of water vapor. In concealed work,

36、install fittings in flush steel boxes with blank cover plates having the same finishes as that of other electrical plates in the room. B. Rigid aluminum conduit fittings: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 28 05 28.33 - 6 1. Standa

37、rd threaded couplings, locknuts, bushings, and elbows: Malleable iron, steel or aluminum alloy materials; Zinc or cadmium plate iron or steel fittings. Aluminum fittings containing more than 0.4 percent copper are prohibited. 2. Locknuts and bushings: As specified for rigid steel and IMC conduit. 3.

38、 Set screw fittings: Not permitted for use with aluminum conduit. C. Electrical metallic tubing fittings: 1. Fittings shall meet the requirements of UL 514B and ANSI/ NEMA FB1. 2. Only steel or malleable iron materials are acceptable. 3. Couplings and connectors: Concrete tight and rain tight, with

39、connectors having insulated throats. Use gland and ring compression type couplings and connectors for conduit sizes 50 mm (2 inches) and smaller. Use set screw type couplings with four set screws each for conduit sizes over 50 mm (2 inches). Use set screws of case-hardened steel with hex head and cu

40、p point to firmly seat in wall of conduit for positive grounding. 4. Indent type connectors or couplings are prohibited. 5. Die-cast or pressure-cast zinc-alloy fittings or fittings made of “pot metal“ are prohibited. D. Flexible steel conduit fittings: 1. Conform to UL 514B. Only steel or malleable

41、 iron materials are acceptable. 2. Clamp type, with insulated throat. E. Liquid-tight flexible metal conduit fittings: 1. Fittings shall meet the requirements of UL 514B and ANSI/ NEMA FB1. 2. Only steel or malleable iron materials are acceptable. 3. Fittings must incorporate a threaded grounding co

42、ne, a steel or plastic compression ring, and a gland for tightening. Connectors shall have insulated throats. F. Direct burial plastic conduit fittings: 1. Fittings shall meet the requirements of UL 514C and NEMA TC3. 2. As recommended by the conduit manufacturer. G. Surface metal raceway fittings:

43、As recommended by the raceway manufacturer. H. Expansion and deflection couplings: 1. Conform to UL 467 and UL 514B. 2. Accommodate, 19 mm (0.75 inch) deflection, expansion, or contraction in any direction, and allow 30 degree angular deflections. 3. Include internal flexible metal braid sized to gu

44、arantee conduit ground continuity and fault currents in accordance with UL 467, and the NEC code tables for ground conductors. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-09-11 28 05 28.33 - 7 4. Jacket: Flexible, corrosion-resistant, watertight,

45、 moisture and heat resistant molded rubber material with stainless steel jacket clamps. 2.5 CONDUIT SUPPORTS A. Parts and hardware: Zinc-coat or provide equivalent corrosion protection. B. Individual Conduit Hangers: Designed for the purpose, having a pre-assembled closure bolt and nut, and provisio

46、ns for receiving a hanger rod. C. Multiple conduit (trapeze) hangers: Not less than 38 mm by 38 mm (1-1/2 by 1-1/2 inch), 12 gage steel, cold formed, lipped channels; with not less than 9 mm (3/8 inch) diameter steel hanger rods. D. Solid Masonry and Concrete Anchors: Self-drilling expansion shields

47、, or machine bolt expansion. 2.6 OUTLET, JUNCTION, AND PULL BOXES A. UL-50 and UL-514A. B. Cast metal where required by the NEC or shown, and equipped with rustproof boxes. C. Nonmetallic Outlet and Device Boxes: NEMA OS 2. D. Metal Floor Boxes: Cast or sheet metal, semi-adjustable, rectangular. E.

48、Sheet metal boxes: Galvanized steel, except where otherwise shown. F. Flush mounted wall or ceiling boxes shall be installed with raised covers so that front face of raised cover is flush with the wall. Surface mounted wall or ceiling boxes shall be installed with surface style flat or raised covers

49、. 2.7 CABINETS A. NEMA 250, Type 1, galvanized-steel box with removable interior panel and removable front, finished inside and out with manufacturers standard enamel. B. Hinged door in front cover with flush latch and concealed hinge. C. Key latch to match panelboards. D. Metal barriers to separate wiring of different systems and voltage. E. Accessory feet where required for freestanding equipment. 2.8 WIRE