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SPECIFICATIONS INDEX GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS DIVISION 27 — COMMUNICATION Specifications Index - Office { he Governor. § Thomas, U. $ SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS PART 1 - GENERAL 1.1 A. 1.2 1.3 1.5 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. SUMMARY Section Includes: Metal conduits and fittings. Nonmetallic conduits and fittings. Optical-fiber-cable pathways and fittings. Metal wireways and auxiliary gutters. Nonmetallic wireways and auxiliary gutters. Surface pathways. Boxes, enclosures, and cabinets. Handholes and boxes for exterior underground cabling. PAINAMPWN> Related Requirements: 1. Section 260543 "Underground Ducts and Raceways for Electrical Systems" for exterior ductbanks, manholes, and underground utility construction. 2. Section 260533 "Raceways and Boxes for Electrical Systems" for conduits, wireways, surface raceways, boxes, enclosures, cabinets, handholes, and faceplate adapters serving electrical systems. 3. Section 280528 "Pathways for Electronic Safety and Security" for conduits, surface pathways, innerduct, boxes, and faceplate adapters serving electronic safety and security. DEFINITIONS ARC: Aluminum rigid conduit. GRC: Galvanized rigid steel conduit. IMC: Intermediate metal conduit. ACTION SUBMITTALS Product Data: For surface pathways, wireways and fittings, floor boxes, hinged-cover enclosures, and cabinets. LEED Submittals: INFORMATIONAL SUBMITTALS Coordination Drawings: Pathway routing plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of items involved: 1. Structural members in paths of pathway groups with common supports. Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2. HVAC and plumbing items and architectural features in paths of conduit groups with common supports. Qualification Data: For professional engineer. Source quality-control reports. PART 2 - PRODUCTS 2.1 A. a mB A METAL CONDUITS AND FITTINGS Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: AFC Cable Systems, Inc. Allied Tube & Conduit; a Tyco International Ltd. Co. Alpha Wire Company. Anamet Electrical, Inc. Electri-Flex Company. O-Z/Gedney; a brand of EGS Electrical Group. Republic Conduit. Southwire Company. Thomas & Betts Corporation. Western Tube and Conduit Corporation. Wheatland Tube Company; a division of John Maneely Company. = SO RPNAMWAYNE - © General Requirements for Metal Conduits and Fittings: 1. Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 2. Comply with TIA-569-B. GRC: Comply with ANSI C80.1 and UL 6. ARC: Comply with ANSI C80.5 and UL 6A. IMC: Comply with ANSI C80.6 and UL 1242. PVC-Coated Steel Conduit: PVC-coated rigid steel conduit. 1. Comply with NEMA RN 1. 2. Coating Thickness: 0.040 inch (1 mm), minimum. EMT: Comply with ANSI C80.3 and UL 797. Fittings for Metal Conduit: Comply with NEMA FB 1 and UL 514B. 1. Conduit Fittings for Hazardous (Classified) Locations: Comply with UL 886 and NFPA 70. 2. Fittings for EMT: a. Material: Steel. Jaredian Design Group SECTION 27 05 26 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2.2 b. Type: Setscrew or compression. 3. Expansion Fittings: PVC or steel to match conduit type, complying with UL-467, rated for environmental conditions where installed, and including flexible external bonding jumper. 4, Coating for Fittings for PVC-Coated Conduit: Minimum thickness of 0.040 inch (1 mm), with overlapping sleeves protecting threaded joints. Joint Compound for IMC, GRC, or ARC: Approved, as defined in NFPA 70, by authorities having jurisdiction for use in conduit assemblies, and compounded for use to lubricate and protect threaded conduit joints from corrosion and to enhance their conductivity. NONMETALLIC CONDUITS AND FITTINGS Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1 AFC Cable Systems, Inc. 2 Allied Tube & Conduit; a Tyco International Ltd. Co. 3 Anamet Electrical, Inc. 4. Arnco Corporation. 5. CANTEX Inc. 6 CertainTeed Corp. 7 Condux International, Inc. 8 Electri-Flex Company. 9 Kraloy. 10. Lamson & Sessions; Carlon Electrical Products. 11. Niedax-Kleinhuis USA, Inc. 12. RACO; a Hubbell company. 13. Thomas & Betts Corporation. General Requirements for Nonmetallic Conduits and Fittings: 1. Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 2. Comply with TIA-569-B. RNC: Type EPC-40-PVC, complying with NEMATC2 and UL 651 unless otherwise indicated. Rigid HDPE: Comply with UL 651A. RTRC: Comply with UL 1684A and NEMA TC 14. Fittings for RNC: Comply with NEMA TC 3; match to conduit or tubing type and material. Solvent cements and adhesive primers shall have a VOC content of 510 and 550 g/L or less, respectively, when calculated according to 40 CFR 59, Subpart D (EPA Method 24). Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2.3 2.4 2.5 Solvent cements and adhesive primers shall comply with the testing and product requirements of the California Department of Health Services’ "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers." OPTICAL-FIBER-CABLE PATHWAYS AND FITTINGS Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Alpha Wire Company. 2 Arnco Corporation. 3. Endot Industries Inc. 4. IPEX. 5 Lamson & Sessions; Carlon Electrical Products. Description: Comply with UL 2024; flexible-type pathway, approved for plenum installation unless otherwise indicated. 1. Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 2. Comply with TIA-569-B. METAL WIREWAYS AND AUXILIARY GUTTERS Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Cooper B-Line, Inc. 2. Hoffman; a Pentair company. 3. Mono-Systems, Inc. 4. Square D; a brand of Schneider Electric. Description: Sheet metal, complying with UL 870 and NEMA 250, Type | unless otherwise indicated, and sized according to NFPA 70. 1. Metal wireways installed outdoors shall be listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 2. Comply with TIA-569-B. Fittings and Accessories: Include covers, couplings, offsets, elbows, expansion joints, adapters, hold-down straps, end caps, and other fittings to match and mate with wireways as required for complete system. Wireway Covers: Hinged type unless otherwise indicated. Finish: Manufacturer's standard enamel finish. NONMETALLIC WIREWAYS AND AUXILIARY GUTTERS Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Allied Moulded Products, Inc. 2. Hoffman; a Pentair company. Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE IJ RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2.6 3. Lamson & Sessions; Carlon Electrical Products. 4. Niedax-Kleinhuis USA, Inc. General Requirements for Nonmetallic Wireways and Auxiliary Gutters: 1. Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 2. Comply with TIA-569-B. Description: Fiberglass polyester, extruded and fabricated to required size and shape, without holes or knockouts. Cover shall be gasketed with oil-resistant gasket material and fastened with captive screws treated for corrosion resistance. Connections shall be flanged and have stainless- steel screws and oil-resistant gaskets. Description: PVC, extruded and fabricated to required size and shape, and having snap-on cover, mechanically coupled connections, and plastic fasteners. Fittings and Accessories: Couplings, offsets, elbows, expansion joints, adapters, hold-down straps, end caps, and other fittings shall match and mate with wireways as required for complete system. Solvent cements and adhesive primers shall have a VOC content of 510 and 550 g/L or less, respectively, when calculated according to 40 CFR 59, Subpart D (EPA Method 24). Solvent cements and adhesive primers shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers." SURFACE PATHWAYS General Requirements for Surface Pathways: l. Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 2. Comply with TIA-569-B. Surface Metal Pathways: Galvanized steel with snap-on covers complying with UL 5. Prime coated, ready for field painting. 1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: a. Mono-Systems, Inc. b. Niedax-Kleinhuis USA, Inc. c. Panduit Corp. d. Wiremold / Legrand. Surface Nonmetallic Pathways: Two- or three-piece construction, complying with UL 5A, and manufactured of rigid PVC with texture and color selected by Architect from manufacturer's standard colors. Product shall comply with UL-94 V-O requirements for self-extinguishing characteristics. Jaredian Design Group SECTION 27 05 28 - PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2.7 1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: a. Hubbell Incorporated; Wiring Device-Kellems Division. b. Lamson & Sessions; Carlon Electrical Products. c. Mono-Systems, Inc. d. Panduit Corp. e. Wiremold / Legrand. BOXES, ENCLOSURES, AND CABINETS Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: Adalet. Cooper Technologies Company; Cooper Crouse-Hinds. EGS/Appleton Electric. Erickson Electrical Equipment Company. Hoffman; a Pentair company. Hubbell Incorporated; Killark Division. Lamson & Sessions; Carlon Electrical Products. Milbank Manufacturing Co. . Molex; Woodhead Brand. 10. Mono-Systems, Inc. 11. O-Z/Gedney; a brand of EGS Electrical Group. 12. RACO; a Hubbell company. 13. Robroy Industries. 14. Spring City Electrical Manufacturing Company. 15. Stahlin Non-Metallic Enclosures; a division of Robroy Industries. 16. Thomas & Betts Corporation. 17. Wiremold / Legrand. PRA DARYWNS General Requirements for Boxes, Enclosures, and Cabinets: l. Comply with TIA-569-B. 2. Boxes, enclosures and cabinets installed in wet locations shall be listed for use in wet locations. Sheet-Metal Outlet and Device Boxes: Comply with NEMA OS | and UL 514A. Cast-Metal Outlet and Device Boxes: Comply with NEMA FB 1, aluminum, Type FD, with gasketed cover. Box extensions used to accommodate new building finishes shall be of same material as recessed box. Metal Floor Boxes: 1. Material: Cast metal. 2. Type: Fully adjustable. 3. Shape: Rectangular. Jaredian Design Group SECTION 27 05 26 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2.8 Page 7of 14 4. Listing and Labeling: Metal floor boxes shall be listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. Nonmetallic Floor Boxes: Nonadjustable, rectangular. 1. Listing and Labeling: Nonmetallic floor boxes shall be listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. Small Sheet Metal Pull and Junction Boxes: NEMA OS I. Cast-Metal Access, Pull, and Junction Boxes: Comply with NEMA FB 1 and UL 1773, cast aluminum with gasketed cover. Device Box Dimensions: 4 inches square by 2-1/8 inches deep (100 mm square by 60 mm deep). Gangable boxes are prohibited. Nonmetallic Outlet and Device Boxes: Comply with NEMA OS 2 and UL 514C. Hinged-Cover Enclosures: Comply with UL 50 and NEMA 250, Type | with continuous-hinge cover with flush latch unless otherwise indicated. 1. Metal Enclosures: Steel, finished inside and out with manufacturer's standard enamel. 2. Nonmetallic Enclosures: a. Material: Fiberglass. b. Finished inside with radio-frequency-resistant paint. 3, Interior Panels: Steel; all sides finished with manufacturer's standard enamel. Cabinets: 1. NEMA 250, Type 1, galvanized-steel box with removable interior panel and removable front, finished inside and out with manufacturer's standard enamel. Hinged door in front cover with flush latch and concealed hinge. Key latch to match panelboards. Metal barriers to separate wiring of different systems and voltage. Accessory feet where required for freestanding equipment. Nonmetallic cabinets shall be listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. ANP WN HANDHOLES AND BOXES FOR EXTERIOR UNDERGROUND CABLING General Requirements for Handholes and Boxes: 1. Boxes and handholes for use in underground systems shall be designed and identified as defined in NFPA 70, for intended location and application. 2. Boxes installed in wet areas shall be listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. 3, Comply with TIA-569-B. Jaredian Design Group SECTION 27 05 26 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS Polymer-Concrete Handholes and Boxes with Polymer-Concrete Cover: Molded of sand and aggregate, bound together with polymer resin, and reinforced with steel, fiberglass, or a combination of the two. 1. uw NM Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: Armorcast Products Company. Carson Industries LLC. CDR Systems Corporation; Hubbell Power Systems. NewBasis. Oldcastle Precast, Inc.; Christy Concrete Products. Synertech Moulded Products; a division of Oldcastle Precast, Inc. monoges Standard: Comply with SCTE 77. Configuration: Designed for flush burial with open bottom unless otherwise indicated. Cover: Weatherproof, secured by tamper-resistant locking devices and having structural load rating consistent with enclosure and handhole location. Cover Finish: Nonskid finish shall have a minimum coefficient of friction of 0.50. Cover Legend: Molded lettering, "COMMUNICATIONS.". Conduit Entrance Provisions: Conduit-terminating fittings shall mate with entering ducts for secure, fixed installation in enclosure wall. Handholes 12 Inches Wide by 24 Inches Long (300 mm Wide by 600 mm Long) and Larger: Have inserts for cable racks and pulling-in irons installed before concrete is poured. Fiberglass Handholes and Boxes: Molded of fiberglass-reinforced polyester resin, with frame and covers of polymer concrete. 1. wewN n em Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: Nordic Fiberglass, Inc. Oldcastle Precast, Inc.; Christy Concrete Products. g. Synertech Moulded Products; a division of Oldcastle Precast, Inc. a. Armorcast Products Company. b. Carson Industries LLC. c. CDR Systems Corporation; Hubbell Power Systems. d. NewBasis. e. f. Standard: Comply with SCTE 77. Color of Frame and Cover: Gray. Configuration: Designed for flush burial with open bottom unless otherwise indicated. Cover: Weatherproof, secured by tamper-resistant locking devices and having structural load rating consistent with enclosure and handhole location. Cover Finish: Nonskid finish shall have a minimum coefficient of friction of 0.50. Cover Legend: Molded lettering, "COMMUNICATIONS.". Conduit Entrance Provisions: Conduit-terminating fittings shall mate with entering ducts for secure, fixed installation in enclosure wall. Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 2.9 PART 3 3.1 A. 9. Handholes 12 Inches Wide by 24 Inches Long (300 mm Wide by 600 mm Long) and Larger: Have inserts for cable racks and pulling-in irons installed before concrete is poured. SOURCE QUALITY CONTROL FOR UNDERGROUND ENCLOSURES Handhole and Pull-Box Prototype Test: Test prototypes of handholes and boxes for compliance with SCTE 77. Strength tests shall be for specified tier ratings of products supplied. 1. Tests of materials shall be performed by an independent testing agency. 2. Strength tests of complete boxes and covers shall be by either an independent testing agency or manufacturer. A qualified registered professional engineer shall certify tests by manufacturer. 3. Testing machine pressure gages shall have current calibration certification complying with ISO 9000 and ISO 10012, and traceable to NIST standards. - EXECUTION PATHWAY APPLICATION Outdoors: Apply pathway products as specified below unless otherwise indicated: 1, Exposed Conduit: RNC, Type EPC-40-PVC. 2. Concealed Conduit, Aboveground: IMC, EMT. 3. Underground Conduit: RNC, Type EPC-40-PVC, direct buried. 4 Boxes and Enclosures, Aboveground: NEMA 250, Type 4. Indoors: Apply pathway products as specified below unless otherwise indicated: 1. Exposed, Not Subject to Physical Damage: EMT. 2. Exposed, Not Subject to Severe Physical Damage: EMT. 3. Exposed and Subject to Severe Physical Damage: GRC. Pathway locations include the following: a. Loading dock. b Corridors used for traffic of mechanized carts, forklifts, and pallet-handling units. c. Mechanical rooms. d Gymnasiums 4. Concealed in Ceilings and Interior Walls and Partitions: EMT. 5. Damp or Wet Locations: GRC. 6. Pathways for Optical-Fiber or Communications Cable in Spaces Used for Environmental Air: EMT. 7. Pathways for Optical-Fiber or Communications-Cable Risers in Vertical Shafts: EMT. 8. Pathways for Concealed General-Purpose Distribution of Optical-Fiber or Communications Cable: EMT. 9. Boxes and Enclosures: NEMA 250 Type 1, except use NEMA 250 Type 4 nonmetallic in institutional and commercial kitchens and damp or wet locations. Minimum Pathway Size: 1-inch (27-mm) trade size. Minimum size for optical-fiber cables is 1 inch (27 mm). Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A — 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS D. ‘Pathway Fittings: Compatible with pathways and suitable for use and location. 1. Rigid and Intermediate Steel Conduit: Use threaded rigid steel conduit fittings unless otherwise indicated. Comply with NEMA FB 2.10. 2. PVC Externally Coated, Rigid Steel Conduits: Use only fittings listed for use with this type of conduit. Patch and seal all joints, nicks, and scrapes in PVC coating after installing conduits and fittings. Use sealant recommended by fitting manufacturer and apply in thickness and number of coats recommended by manufacturer. 3. EMT: Use setscrew or compression, steel fittings. Comply with NEMA FB 2.10. E. Do not install aluminum conduits, boxes, or fittings in contact with concrete or earth. F. Install surface pathways only where indicated on Drawings. G. Do not install nonmetallic conduit where ambient temperature exceeds 120 deg F (49 deg C). 3.2 INSTALLATION A. Comply with NECA 1, NECA 101, and TIA-569-B for installation requirements except where requirements on Drawings or in this article are stricter. Comply with NECA 102 for aluminum pathways. Comply with NFPA 70 limitations for types of pathways allowed in specific occupancies and number of floors. B. Keep pathways at least 6 inches (150 mm) away from parallel runs of flues and steam or hot- water pipes. Install horizontal pathway runs above water and steam piping. C. | Complete pathway installation before starting conductor installation. D. Comply with requirements in Section 260529 "Hangers and Supports for Electrical Systems" for hangers and supports. E. Arrange stub-ups so curved portions of bends are not visible above finished slab. F, Install no more than the equivalent of two 90-degree bends in any pathway run. Support within 12 inches (300 mm) of changes in direction. Utilize long radius ells for all optical-fiber cables. G. — Conceal conduit and EMT within finished walls, ceilings, and floors unless otherwise indicated. Install conduits parallel or perpendicular to building lines. H. Support conduit within 12 inches (300 mm) of enclosures to which attached. I. Pathways Embedded in Slabs: 1. Run conduit larger than 1-inch (27-mm) trade size, parallel or at right angles to main reinforcement. Where at right angles to reinforcement, place conduit close to slab support. Secure pathways to reinforcement at maximum 10-foot (3-m) intervals. 2. Arrange pathways to cross building expansion joints at right angles with expansion fittings. 3. Arrange pathways to keep a minimum of | inch (25 mm) of concrete cover in all directions. Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A — 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 4. Do not embed threadless fittings in concrete unless specifically approved by Architect for each specific location. 5. Change from ENT to IMC before rising above floor. Stub-ups to Above Recessed Ceilings: 1. Use EMT, IMC, or RMC for pathways. 2. Use a conduit bushing or insulated fitting to terminate stub-ups not terminated in hubs or in an enclosure. Threaded Conduit Joints, Exposed to Wet, Damp, Corrosive, or Outdoor Conditions: Apply listed compound to threads of pathway and fittings before making up joints. Follow compound manufacturer's written instructions. Coat field-cut threads on PVC-coated pathway with a corrosion-preventing conductive compound prior to assembly. Terminate threaded conduits into threaded hubs or with locknuts on inside and outside of boxes or cabinets. Install insulated bushings on conduits terminated with locknuts. Install pathways square to the enclosure and terminate at enclosures with locknuts. Install locknuts hand tight plus 1/4 turn more. Do not rely on locknuts to penetrate nonconductive coatings on enclosures. Remove coatings in the locknut area prior to assembling conduit to enclosure to assure a continuous ground path. Cut conduit perpendicular to the length. For conduits of 2-inch (53-mm) trade size and larger, use roll cutter or a guide to ensure cut is straight and perpendicular to the length. Install pull wires in empty pathways. Use polypropylene or monofilament plastic line with not less than 200-lb (90-kg)tensile strength. Leave at least 12 inches (300 mm)of slack at each end of pull wire. Cap underground pathways designated as spare above grade alongside pathways in use. Surface Pathways: 1. Install surface pathway for surface telecommunications outlet boxes only where indicated on Drawings. 2. Install surface pathway with a minimum 2-inch (50-mm) radius control at bend points. 3. Secure surface pathway with screws or other anchor-type devices at intervals not exceeding 48 inches (1200 mm) and with no less than two supports per straight pathway section. Support surface pathway according to manufacturer's written instructions. Tape and glue are not acceptable support methods. Pathways for Optical-Fiber and Communications Cable: Install pathways, metal and nonmetallic, rigid and flexible, as follows: 1. 3/4-Inch (21-mm) Trade Size and Smaller: Install pathways in maximum lengths of 50 feet (15 m). 2. 1-Inch (27-mm) Trade Size and Larger: Install pathways in maximum lengths of 75 feet (23 m). Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS AA. BB. CC. 3.3 Jaredia 3. Install with a maximum of two 90-degree bends or equivalent for each length of pathway unless Drawings show stricter requirements. Separate lengths with pull or junction boxes or terminations at distribution frames or cabinets where necessary to comply with these requirements. Install pathway sealing fittings at accessible locations according to NFPA 70 and fill them with listed sealing compound. For concealed pathways, install each fitting in a flush steel box with a blank cover plate having a finish similar to that of adjacent plates or surfaces. Install pathway sealing fittings according to NFPA 70. Install devices to seal pathway interiors at accessible locations. Locate seals so no fittings or boxes are between the seal and the following changes of environments. Seal the interior of all pathways at the following points: 1. Where conduits pass from warm to cold locations, such as boundaries of refrigerated spaces. 2. Where an underground service pathway enters a building or structure. 3. Where otherwise required by NFPA 70. Comply with manufacturer's written instructions for solvent welding PVC conduit and fittings. Mount boxes at heights indicated on Drawings. If mounting heights of boxes are not individually indicated, give priority to ADA requirements. Install boxes with height measured to top of box unless otherwise indicated. Recessed Boxes in Masonry Walls: Saw-cut opening for box in center of cell of masonry block, and install box flush with surface of wall. Prepare block surface to provide a flat surface for a raintight connection between box and cover plate or supported equipment and box. Horizontally separate boxes mounted on opposite sides of walls so they are not in the same vertical channel. Support boxes of three gangs or more from more than one side by spanning two framing members or mounting on brackets specifically designed for the purpose. Fasten junction and pull boxes to or support from building structure. Do not support boxes by conduits. Set metal floor boxes level and flush with finished floor surface. Set nonmetallic floor boxes level. Trim after installation to fit flush with finished floor surface. INSTALLATION OF UNDERGROUND CONDUIT Direct-Buried Conduit: 1. Excavate trench bottom to provide firm and uniform support for conduit. Prepare trench bottom as specified in Section 312000 "Earth Moving" for pipe less than 6 inches (150 mm) in nominal diameter. 2. Install backfill as specified in Section 312000 "Earth Moving." n Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 3.4 3.5 3.6 3. After installing conduit, backfill and compact. Start at tie-in point, and work toward end of conduit run, leaving conduit at end of run free to move with expansion and contraction as temperature changes during this process. Firmly hand tamp backfill around conduit to provide maximum supporting strength. After placing controlled backfill to within 12 inches (300 mm) of finished grade, make final conduit connection at end of run and complete backfilling with normal compaction as specified in Section 312000 "Earth Moving." 4. Install manufactured duct elbows for stub-ups at poles and equipment and at building entrances through floor unless otherwise indicated. Encase elbows for stub-up ducts throughout length of elbow. 5. Install manufactured rigid steel conduit elbows for stub-ups at poles and equipment and at building entrances through floor. a. Couple steel conduits to ducts with adapters designed for this purpose, and encase coupling with 3 inches (75 mm) of concrete for a minimum of 12 inches (300 mm) on each side of the coupling. b. For stub-ups at equipment mounted on outdoor concrete bases and where conduits penetrate building foundations, extend steel conduit horizontally a minimum of 60 inches (1500 mm) from edge of foundation or equipment base. Install insulated grounding bushings on terminations at equipment. 6. Warning Planks: Bury warning planks approximately 12 inches (300 mm) above direct- buried conduits, but a minimum of 6 inches (150 mm) below grade. Align planks along centerline of conduit. 7. Underground Warning Tape: Comply with requirements in Section 260553 "Identification for Electrical Systems." INSTALLATION OF UNDERGROUND HANDHOLES AND BOXES Install handholes and boxes level and plumb and with orientation and depth coordinated with connecting conduits to minimize bends and deflections required for proper entrances. Unless otherwise indicated, support units on a level bed of crushed stone or gravel, graded from 1/2-inch (12.5-mm) sieve to No. 4 (4.75-mm) sieve and compacted to same density as adjacent undisturbed earth. Elevation: In paved areas, set so cover surface will be flush with finished grade. Set covers of other enclosures 1 inch (25 mm) above finished grade. SLEEVE AND SLEEVE-SEAL INSTALLATION FOR COMMUNICATIONS PENETRATIONS Install sleeves and sleeve seals at penetrations of exterior floor and wall assemblies. Comply with requirements in Section 270544 "Sleeves and Sleeve Seals for Communications Pathways and Cabling." FIRESTOPPING Install firestopping at penetrations of fire-rated floor and wall assemblies. Comply with requirements in Section 078413 "Penetration Firestopping.” Jaredian Design Group SECTION 27 05 28 — PATHWAYS FOR COMMUNICATION SYSTEMS GOVERNMENT OF THE U. S. VIRGIN ISLANDS: OFFICE OF THE GOVERNOR PHASE II RENOVATION AT 19A - 20 KONGENS GADE ST. THOMAS, U. S. VIRGIN ISLANDS 3.7 PROTECTION A. _ Protect coatings, finishes, and cabinets from damage or deterioration. 1. Repair damage to galvanized finishes with zinc-rich paint recommended by manufacturer. 2. Repair damage to PVC coatings or paint finishes with matching touchup coating recommended by manufacturer. END OF SECTION Jaredian Design Group