Specifications_-_Project_Manual_-_4.pdf

Final (100%) Submittal

SELFRIDGE AIR NATIONAL GUARD BASE PROJECT NO.: 2016-01842-000

SANG DESIGN AND REPAIR OF ELECTRICAL SYSTEMS:

BUILDINGS 36, SOUTH of 45, 860, 1400

GROUNDING

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SECTION 260526 - GROUNDING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and

Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes grounding of electrical systems and equipment. Extent of grounding work is indicated by Drawings and by requirements of this Section.

B. Provide grounding systems as required, and all materials and equipment, including ground rods, accessories and associated equipment, as indicated or specified.

C. Types of grounding conductors specified:

1. In Earth: Bare, unless otherwise specified.

2. For General Use Above Grade: Insulated, unless otherwise specified.

3. For General Use Below Grade: Insulated, unless otherwise specified.

4. In Conduit with Phase Conductors: Insulated.

5. For Isolated Grounding Systems for Data Processing and Laboratories: Insulated.

D. Types of grounding connections specified:

1. In Earth or Inaccessible Locations: Exothermic welded type.

2. To Structural Steel Used for Main Building Framing: Exothermic welded type.

3. To Non-Permanently Fixed Equipment: Lugs bolted to the equipment.

1.3 RELATED WORK SPECIFIED ELSEWHERE

A. Comply with applicable requirements of Section 264113, “Lightning Protection Systems”.

B. Comply with applicable requirements of Section 267000, “Electrical Systems Testing”.

1.4 ABBREVIATIONS AND DEFINITIONS

A. AWG: American Wire Gauge.

PROJECT NO.: 2016-01842-000 SELFRIDGE AIR NATIONAL GUARD BASE

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B. IEEE: Institute of Electrical and Electronic Engineers.

C. NEC: National Electrical Code.

D. NFPA: National Fire Protection Association.

E. UL: Underwriters Laboratories.

1.5 QUALITY ASSURANCE

A. NEC Compliance: Comply with NEC requirements as applicable to materials and installation of electrical grounding systems, associated equipment and wiring.

B. UL Compliance: Comply with applicable requirements of UL Standards No. 467 and 869 pertaining to electrical grounding and bonding. Provide grounding products which are UL listed and labeled.

C. NFPA Compliance: Comply with applicable requirements of NFPA 780, “Standard for the Installation of Lightning Protection Systems”.

D. Local Electric Power Company Compliance: Comply with the local electric power company requirements and specifications for grounding of equipment owned by the local electric power company and rooms housing their equipment.

1.6 SUBMITTALS

A. Product Data: None required.

B. Shop Drawings: None required.

C. Samples: None required.

1.7 WARRANTY

A. Manufacturer shall warranty equipment to be free from defects in material and workmanship for one

(1) year from date of Owner’s acceptance.

B. Installation contractor shall warranty installation to be free from defects in material and workmanship for one (1) year from date of Owner’s acceptance.

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PART 2 - PRODUCTS

2.1 GROUND RODS

A. Copper-clad steel rods 3/4 inch (19.1 mm) in diameter, 10 ft (3.0 m) long.

1. Harger (www.harger.com).

2. T&B Blackburn (www.tnb.com).

3. Thompson Lightning Protection (www.tlpinc.com).

2.2 GROUNDING CONDUCTORS

A. Bare Grounding Conductors: Stranded annealed copper.

B. Insulated Grounding Conductors: Stranded annealed copper color coded green insulated conductor to match current carrying conductor insulation as specified in Section 260519, “Wire and Cables (600

Volts and Less)” for list of acceptable manufacturers.

2.3 GROUNDING BUS

A. Power Systems - General: Bare, annealed, tinned copper bar 1/4 inch (6.4 mm) thick by 2 inch

(50.8 mm) wide by 12 ft (3.7 m) length (field cut as required) with stand-off insulators. Stand-off insulators shall be 600 volt AC (minimum) rated, 1-1/2 inch (38.1 mm) face diameter, 2 inch

(50.8 mm) high with threaded inserts.

1. Ground Bus:

a. Harger Cat. #CB-14-2-XXX-N Series (www.harger.com).

b. Thompson Lightning Protection Cat. #37216 Series (www.tlpinc.com).

2. Ground Bus Insulator:

a. Harger Cat. #R4150-S4 (www.harger.com).

b. Thompson Lightning Protection Cat. #38316 (www.tlpinc.com).

2.4 GROUNDING CONNECTIONS

A. Exothermic Welding Connection Materials:

1. Exothermic welding connections to be used outdoors shall be suitable for exposure to moisture or direct burial without degradation over the life time of the grounding system.

2. Exothermic welding connections to be made in finished buildings or confined spaces shall use the low smoke, low emission Cadweld Exolon process (or equal by approved manufacturer) which is metallurgically equal to the above connection.

3. Manufacturers:

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a. Cadweld (www.erico.com).

b. Erico (www.erico.com).

c. Thermoweld (www.conind.com).

d. T&B Furseweld (www.tnb.com).

B. Grounding Fittings for Bonding a Ground Conductor to its Own Conduit:

1. Burndy Type GG (www.burndy.com).

2. Penn Union Type GPL (www.penn-union.com).

C. Grounding Fittings for Connection of Grounding Conductor to Fencing:

1. Burndy GL or GD (www.burndy.com).

D. Ground Bonding Straps and Jumpers:

1. Flexible, tinned, pure copper braid with unplated, seamless pure copper ferrules formed into rectangular shapes on each end. Jumper shall be rated 200 amp (minimum) and length as required.

a. Burndy (www.burndy.com).

b. ILSCO Type T (www.ilsco.com).

c. T&B Blackburn Type FB (www.tnb.com).

E. Other Grounding Connectors and Lugs:

1. Compression type as specified in Section 260519, “Wires and Cables (600 Volts and Less)” for requirements.

PART 3 - EXECUTION

3.1 APPLICATION

A. Use only copper conductors for both insulated and bare grounding conductors in direct contact with earth, concrete, masonry, crushed stone, and similar materials.

B. In raceways, use insulated color coded green copper equipment grounding conductors.

C. Exothermic-Welded Connections: Use for connections to structural steel and for underground connections, except those at test wells.

D. Equipment Grounding Conductor Terminations: Use bolted pressure clamps.

E. Underground Grounding Conductors: Use bare copper conductor, #4/0 AWG (107.2 mm ) minimum.

Bury at least 24 inch (610 mm) below grade or bury 12 inch (305 mm) above duct bank when installed as part of the duct bank.

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F. Secondary Neutral and Transformer Enclosure: Interconnect and connect to grounding conductor.

3.2 EQUIPMENT GROUNDING CONDUCTORS

A. Comply with NEC for types, sizes, and quantities of equipment grounding conductors, unless specific types, larger sizes, or more conductors than required by NEC are indicated.

B. Install code color green insulated equipment grounding conductors in all feeders and circuits.

C. Isolated Equipment Enclosure Circuits: For designated equipment supplied by a branch circuit or feeder, isolate equipment enclosure from supply raceway with a nonmetallic raceway fitting listed for the purpose. Install fitting where raceway enters enclosure, and install a separate equipment grounding conductor. Isolate equipment grounding conductor from raceway and from panelboard grounding terminals. Terminate at equipment grounding conductor terminal of the applicable derived system or service, unless otherwise indicated.

D. Nonmetallic Raceways: Install an equipment grounding conductor in nonmetallic raceways, unless they are designated for telephone or data cables.

3.3 INSTALLATION

A. Main Grounding System:

1. The maximum resistance of any one rod is not to exceed 10 ohms (to be tested before any connection to other equipment).

2. Overall grounding mat is not to exceed 5 ohms. This measurement is to be with no other connections to building steel and/or water system.

3. Below grade connections to be by Cadweld exothermic process.

B. Ground Rods: Install at least three rods spaced at least one-rod length from each other and located at least the same distance from other grounding electrodes, unless otherwise indicated on Drawings.

C. Drive ground rods until tops are 6 inch (152 mm) below finished floor or 24 inch (610 mm) below final grade, unless otherwise indicated.

D. Interconnect ground rods with grounding electrode conductors. Use exothermic welds, except at test wells and as otherwise indicated. Make connections without exposing steel or damaging copper coating.

E. Do not install copper ground rods and conductors in cinder fill or soil containing cinders. Protect ground cables subject to mechanical damage by rigid steel conduit and bond conductor to the conduit at each end.

F. Grounding Conductors:

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1. Extend ground conductors from the ground system to all switchgear, transformers, unit substations, motor control centers, motor starter panels, panelboards, and control panel ground buses or ground bars.

2. Equipment rated above 480 volt AC or 600 amps shall be grounded by two independent ground conductors.

3. Route along shortest and straightest paths possible, unless otherwise indicated on Drawings.

4. Avoid obstructing access or placing conductors where they may be subjected to strain, impact, or damage.

5. Provide protection for ground conductors subject to physical damage or abuse. Where metallic conduit is used for physical protection of a ground conductor, the conductor shall be bonded to the conduit at both ends.

G. Bonding Straps and Jumpers: Install so vibration by equipment mounted on vibration isolation hangers and supports is not transmitted to rigidly mounted equipment. Use exothermic-welded connectors for outdoor locations, unless a disconnect type connection is required; then, use a bolted clamp. Bond straps directly to the basic structure taking care not to penetrate any adjacent parts. Install straps only in locations accessible for maintenance.

H. Ufer Ground (Concrete-Encased Grounding Electrode): Fabricate according to NEC using a minimum of 20 ft (6.1 m) of bare copper conductor not smaller than #4/0 AWG (107.2 mm ). If concrete foundation is less than 20 ft (6.1 m) long, coil excess conductor within the base of the foundation.

Bond grounding conductor to reinforcing steel in at least four locations and to anchor bolts. Extend grounding conductor below grade and connect to building grounding grid or to a grounding electrode external to concrete.

I. Equipment Enclosures: The enclosures of all switchgear, transformers, unit substations, motor controls, and panelboards shall be grounded by a separate grounding conductor to the ground system.

J. Power Cable Shields: The shields of shielded power cables shall be grounded at both ends. The shields of shielded power cables spliced in the cable vault shall also be grounded in the cable vault.

3.4 CONNECTIONS

A. General: Make connections so galvanic action or electrolysis possibility is minimized. Select connectors, connection hardware, conductors, and connection methods so metals in direct contact will be galvanically compatible.

1. Use electroplated or hot-tin-coated materials to ensure high conductivity and to make contact points closer to order of galvanic series.

2. Make connections with clean, bare metal at points of contact.

3. Make aluminum-to-steel connections with stainless-steel separators and mechanical clamps.

4. Make aluminum-to-galvanized steel connections with tin-plated copper jumpers and mechanical clamps.

5. Coat and seal connections having dissimilar metals with inert material to prevent future penetration of moisture to contact surfaces.

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6. Thoroughly clean all bonding surfaces of non-conducting materials. Tin and sweat contact surfaces while bolting. Do not use solder type connections.

B. Exothermic-Welded Connections: Comply with manufacturer’s written instructions. Welds that are puffed up or that show convex surfaces indicating improper cleaning are not acceptable.

C. Equipment Grounding Conductor Terminations: For #8 AWG (8.367 mm ) and larger, use pressure-type grounding lugs. For #10 AWG (5.261 mm ) and smaller grounding conductors may be terminated with winged pressure-type connectors.

D. Noncontact Metal Raceway Terminations: If metallic raceways terminate at metal housings without mechanical and electrical connection to housing, terminate each conduit with a grounding bushing.

Connect grounding bushings with a bare grounding conductor to grounding bus or terminal in housing.

Bond electrically non-continuous conduits at entrances and exits with grounding bushings and bare grounding conductors, unless otherwise indicated.

E. Tighten screws and bolts for grounding and bonding connectors and terminals according to manufacturer’s published torque-tightening values. If manufacturer’s torque values are not indicated, use those specified in UL 486A.

F. Compression-Type Connections: Use hydraulic compression tools to provide correct circumferential pressure for compression connectors. Use tools and dies recommended by connector manufacturer.

Provide embossing die code or other standard method to make a visible indication that a connector has been adequately compressed on grounding conductor.

G. Moisture Protection: If insulated grounding conductors are connected to ground rods or grounding buses, insulate entire area of connection and seal against moisture penetration of insulation and cable.

3.5 UNDERGROUND DISTRIBUTION SYSTEM GROUNDING

A. Duct Banks: Install a grounding conductor in duct banks. Conductor shall be sized as indicated on

Drawings, but in no case for over 600 volt AC systems shall the cable be less than #4/0 AWG

(107.2 mm ) copper.

B. Manholes and Handholes: Install a driven ground rod close to wall and set rod depth so 4 inch

(102 mm) will extend above finished floor. If necessary, install ground rod before manhole is placed and provide a No. 4/0 AWG (107.2 mm ) bare copper conductor from ground rod into manhole through a waterproof sleeve in manhole wall. Protect ground rods passing through concrete floor with a double wrapping of pressure-sensitive tape or heat-shrunk insulating sleeve from 2 inch (50.8 mm) above to 12 inch (305 mm) below concrete. Seal floor opening with waterproof, non-shrink grout.

C. Connections to Manhole and Handhole Components: Connect exposed-metal parts such as inserts, cable racks, pulling irons, ladders, and cable shields within each manhole, to ground rod or grounding conductor. Make connections with #4/0 AWG (107.2 mm ) minimum, stranded, hard-drawn copper

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conductor. Train conductors level or plumb around corners and fasten to manhole walls. Connect to cable armor and cable shields as recommended by manufacturer of splicing and termination kits.

D. Pad-Mounted Transformers and Switches: Install two ground rods and counterpoise circling pad, unless otherwise indicated on Drawings. Ground pad-mounted equipment and noncurrent-carrying metal items associated with substations and service entrance equipment by connecting them to underground cable and grounding electrodes. Use bare copper conductor not less than #4/0 AWG

(107.2 mm ) for counterpoise and for taps to equipment ground pad. Bury counterpoise not less than

18 inch (457 mm) below grade and 6 inch (152 mm) from the foundation.

3.6 FIELD QUALITY CONTROL

A. Grounding system shall meet the testing requirements as specified in Section 267000, “Electrical

Systems Testing”.

3.7 GRADING AND PLANTING

A. Restore surface features, including vegetation, at areas disturbed by Work of this Section. Re-establish original grades, unless otherwise indicated. If sod has been removed, replace it as soon as possible after backfilling is completed. Restore areas disturbed by trenching, storing of dirt, cable laying, and other activities to their original condition. Include application of topsoil, fertilizer, lime, seed, sod, sprig, and mulch. Comply with applicable Sections of Division 31 and 32. Maintain restored surfaces.

Restore disturbed paving as indicated.

END OF SECTION

MGW

RACEWAYS AND FITTINGS

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SECTION 260533 - RACEWAYS AND FITTINGS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and

Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Extent of basic materials and methods work is indicated by Drawings and by requirements of this

Section.

B. Provide raceway systems as required, and all equipment and material, including conduit, fittings, boxes, wireways, and cable trays, as indicated or specified.

1.3 RELATED WORK SPECIFIED ELSEWHERE

A. Comply with applicable requirements of Section 058010, “Post-Installed Anchors”.

B. Comply with applicable requirements of Section 260500, “General Requirements, Electrical Work”.

C. Comply with applicable requirements of Section 260529, “Hangers and Supports for Electrical

Systems”.

D. Comply with applicable requirements of Section 260543, “Underground Electric Service”.

E. Comply with applicable requirements of Section 260548, “Vibration and Seismic Control for Electrical

Systems”.

F. Comply with applicable requirements of Section 260553, “Identification for Electrical Systems”.

G. Comply with applicable requirements of Section 262726, “Wiring Devices”.

H. Comply with requirements of Section 033000, “Cast-In-Place Concrete” for restrictions on conduits embedded in slab.

1.4 ABBREVIATIONS AND DEFINITIONS

A. AISI: American Iron and Steel Institute.

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B. ANSI: American National Standard Institute.

C. ASTM: American Society for Testing and Materials.

D. BSL-3: Bio-Safety Level 3.

E. EMI: ElectroMagnetic Interference.

F. EMT: Electrical Metallic Tubing.

G. NEC: National Electrical Code.

H. NEMA: National Electrical Manufacturers Association.

I. PVC: Polyvinyl Chloride.

J. RFI: Radio Frequency Interference.

K. UL: Underwriters Laboratories.

1.5 QUALITY ASSURANCE

A. NEC Compliance: Comply with NEC requirements applicable to construction and installation of raceway systems.

B. UL Compliance: Comply with provisions of UL Safety Standards pertaining to electrical raceway systems; and provide raceway materials which have been UL listed and labeled.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Store in clean dry space which prevents formation of condensation. Use storage space with uniform temperature and adequate air circulation. Protect materials from dirt, fumes, water and physical damage.

1.7 SUBMITTALS

A. General:

1. Submit each item in this Article according to the Conditions of the Contract and Division 01

Specification Sections.

B. Product Data:

1. Conduit and Fittings.

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2. Outdoor Receptacle Enclosure.

C. Shop Drawings:

1. For each type of cable tray provide the following: Provide fabrication and installation details of cable tray, including plans, elevations, sections of components and attachments to other construction elements. Designate components and accessories, including clamps, brackets, hanger rods, splice-plates connectors, connectors, expansion-joint assemblies, straight lengths, horizontal bends, vertical bends, tees, crosses, reducers, and drop outs.

2. For each type of floor box provide the following: Provide installation details of floor box, locations and sizes of conduit entries, and associated components.

3. None required.

D. Samples:

1. None required.

1.8 COORDINATION

A. Coordinate layout and installation of conduits, outlet boxes, pull boxes, floor boxes, wireways, and cable trays with other construction elements to ensure adequate headroom, working clearance, access, and slab thickness.

1.9 WARRANTY

A. Manufacturer shall warranty equipment to be free from defects in material and workmanship for one

(1) year from date of Owner’s acceptance.

B. Installation contractor shall warranty installation to be free from defects in material and workmanship for one (1) year from date of Owner’s acceptance.

PART 2 - PRODUCTS

2.1 CONDUIT

A. Rigid Steel Conduit, Elbows, and Couplings: Zinc-coated threaded steel per ANSI C80.1

“Specification for Rigid Steel Conduit, Zinc-coated”. Each length of conduit shall be threaded on both ends.

1. Allied Tube & Conduit (www.alliedtube.com).

2. Republic Conduit (www.republicconduit.com).

3. Wheatland Tube (www.wheatland.com).

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B. Electrical Metallic Tubing: Zinc-coated steel per ANSI C80.3 “Specification for Electrical Tubing, Zinc-coated”.

1. Allied Tube & Conduit (www.alliedtube.com).

2. Republic Conduit (www.republicconduit.com).

3. Wheatland Tube (www.wheatland.com).

C. Flexible Steel Conduit: Full wall, zinc-coated steel per UL-1, “Flexible Metal Conduit”.

1. AFC Cable System. “5400 Product Line” (www.afcweb.com).

2. Electri-Flex, “Type BR” (www.electriflex.com).

3. International Metal Hose, “Type HWS” (www.metalhose.com).

D. Liquid-Tight Flexible Steel Conduit: Per UL-360, “Liquid-tight Flexible Steel Conduit, Electrical”.

1. AFC Cable System, “Amer-Tite, 6200 Product Line” (www.afcweb.com).

2. Alflex, “Ultratite, Type UL” (www.southwire.com).

3. Anamet Electrical, “Sealtite” (www.anacondasealtite.com).

4. Electri-Flex, “Liquatite Type LA” (www.electriflex.com).

5. International Metal Hose, “Sealskin, Type UALT” (www.metalhose.com).

E. Rigid Non-Metallic Conduit, and Couplings: Smooth-wall PVC, 90 deg C (194 deg F), UL listed and in compliance with the testing requirements defined in NEMA WTC-2, NEMA TC-3, UL-651, and

UL-514 (fittings).

1. Schedule 40:

a. Prime Conduit (Schedule 40) (www.primeconduit.com).

b. Cantex (Schedule 40) (www.cantexinc.com).

2.2 CONDUIT FITTINGS

A. Couplings and Connectors for Rigid Steel: Cast or malleable iron tapered threaded devices.

Compression and or split bolt devices are not approved.

1. Appleton (www.egseg.com).

2. Crouse-Hinds (www.crouse-hinds.com).

3. O-Z/Gedney (www.o-zgedney.com).

4. Thomas & Betts (www.tnb.com).

B. Fittings for Rigid Steel: Cast or malleable iron bodies, cadmium or zinc-plated, with taper threads, and screw attached cover plates. Provide gaskets when located in areas requiring gaskets as specified in

Part 3.

1. Appleton Form 35 (www.egseg.com).

2. Crouse-Hinds Form 8 (www.crouse-hinds.com).

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3. O-Z/Gedney Form 35 (www.o-zgedney.com).

4. Thomas & Betts (www.tnb.com).

C. Expansion Fittings for Rigid Steel: Cast or malleable iron bodies, with threaded end caps for receiving fixed and movable conduits, metallic pressure packing and copper bonding jumper assembly, and providing for a minimum of 2 inch (50.8 mm) movement of the conduit in either direction.

1. Appleton Type XJ (www.egseg.com).

2. Crouse-Hinds Type XJG (www.crouse-hinds.com).

3. O-Z/Gedney Type AX (www.o-zgedney.com).

4. Thomas & Betts (www.tnb.com).

D. Expansion Joint for Steel Conduit Encased in Concrete: Non-ferrous expansion joint consisting of a flexible tube with end fittings to receive the conduit and rubber tubing to cover the joint.

E. Couplings and Connectors for EMT: Zinc-plated steel, compression type.

1. Appleton (www.egseg.com).

2. O-Z/Gedney (www.o-zgedney.com).

3. Thomas & Betts (www.tnb.com).

F. Rigid Steel Conduit Unions, on Continuous Run:

1. Crouse-Hinds Type UNF (www.crouse-hinds.com).

2. O-Z/Gedney Type UNF (www.o-zgedney.com).

3. Thomas & Betts (www.tnb.com).

G. Fittings for Flexible Steel Conduit: Malleable iron or steel, zinc or cadmium plated, securing the conduit by clamping action around the periphery of the conduit. Do not furnish fittings that anchor the conduit by means of set screws.

1. Appleton (www.egseg.com).

2. O-Z/Gedney (www.o-zgedney.com).

3. Crouse-Hinds (www.crouse-hinds.com).

4. Thomas & Betts (www.tnb.com).

H. Fittings for Liquid-Tight Flexible Steel Conduit: Designed to maintain the liquid-tight feature of the installation. Fittings shall be specifically approved for use with liquid-tight flexible steel conduit.

1. Appleton ST Series (www.egseg.com).

2. O-Z/Gedney 4Q (www.o-zgedney.com).

3. Thomas & Betts 5331 to 5360 (www.tnb.com).

4. Crouse-Hinds Liquidator Seals (www.crouse-hinds.com).

I. Locknuts for Rigid Steel or Intermediate Metal Conduit: Malleable iron or steel, zinc or cadmium plated.

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J. Bushings for 1 Inch (27 mm) and Smaller Rigid Steel Conduits, and Electrical Metallic Tubing:

Insulating plastic type of non-burnable thermosetting phenolic, conforming to Underwriters’

Laboratories requirements. Do not furnish non-rigid plastic bushings.

K. Bushings for 1-1/4 Inch (35 mm) and Larger Rigid Steel, and Electrical Metallic Tubing: Malleable iron or steel, zinc or cadmium plated, with insulating insert of thermosetting plastic as specified for smaller conduit bushings, molded and locked into the bushing ring.

L. Fittings for Rigid Non-Metallic Conduit: One-piece body, PVC, UL listed, intended for use with solvent cement. Provide O-rings and gaskets as required for the installation.

1. Schedule 40:

a. Carlon Plus 40 (www.carlon.com).

b. Cantex (Schedule 40) (www.cantexinc.com).

M. Long Expansion Fittings for Rigid Non-Metallic Conduit: One-piece body, PVC, UL listed, intended for use with solvent cement on one end to receive fixed conduit and connect the other conduit to the piston loosely enough to allow the conduit to move as the temperature changes and providing a weather-tight slip joint with a minimum of 6 inch (152 mm) of movement in either direction.

1. Carlon, E945 Series (www.carlon.com).

2. Cantex, 2 piece expansion fittings (www.cantexinc.com).

N. Short Expansion Fittings for Rigid Non-Metallic Conduit: One-piece body, PVC, UL listed, intended for use with solvent cement on one end to receive fixed conduit and O-ring end to receive movable conduit providing a weather-tight slip joint with a minimum of 2 inch (50.8 mm) of movement in either direction to allow the conduit to move as the temperature changes.

1. Carlon, E955 Series (www.carlon.com).

2. Cantex, one piece expansion fittings (www.cantexinc.com).

O. Coupling and Connectors for Rigid Non-Metallic Conduit: One piece body, PVC, UL listed, intended for use with solvent cement.

1. Schedule 40:

a. Carlon Plus 40 (www.carlon.com).

b. Cantex (Schedule 40) (www.cantexinc.com).

P. Rigid Non-Metallic Boxes: One-piece PVC, UL listed, single or multiple gang, with integral hub(s) intended for use with solvent cement for conduit connections, integral detachable mounting feet, suitable to accept devices and cover plates. Provide stainless steel screws for cover plates and mounting hardware.

1. No load boxes:

a. Carlon “FS” and “FD” Series (www.carlon.com).

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2.3 OUTDOOR RECEPTACLE ENCLOSURES (SURFACE MOUNTED)

A. Receptacles in wet locations shall be installed with an outlet enclosure clearly marked “Suitable for

Wet Locations While in Use”. There must be a gasket between the enclosure and the mounting surface, and between the cover and base to assure a proper seal. The enclosure must employ stainless steel mounting hardware and be constructed of impact resistant polycarbonate. The outlet enclosure shall be in compliance with NEC and shall be listed by Underwriters Laboratories, Inc. Enclosure shall be manufactured by TayMac Corporation or Carlon. See Section 262726, “Wiring Devices” for weatherproof cover plates.

2.4 PULL AND JUNCTION BOXES

A. Boxes Less Than 5 Inch (127 mm) by 5 Inch (127 mm): Conform to paragraph “Outlet Boxes”.

B. Sheet Metal Boxes: Code gauge, full seam welded with bent-in flanges seam welded at corner joints, screw fastened cover of same gauge as box. Fasten cover with brass machine screws. Galvanize box and cover after fabrication. Provide sizes conforming to NEC requirements for wiring space, except where boxes of larger size are indicated. Provide gaskets when located in areas requiring gaskets as specified in Part 3.

1. Cooper B-Line (www.cooperbline.com).

2. Hoffman (www.hoffmanonline.com).

3. Wiegmann (www.hubbell-wiegmann.com).

C. Rigid Non-Metallic Pullboxes and Junction Boxes: One-piece PVC or glass-filled thermoplastic body, one-piece screw-down cover of same material as body with stainless steel screws, hubless body suitable for drilling to accept non-metallic conduit fittings. Provide sizes conforming to NEC requirements for wiring space.

1. Carlon E980 Series (www.carlon.com).

2. Cantex (www.cantexinc.com).

2.5 MISCELLANEOUS

A. Trapeze Hangers: Hot-dipped, galvanized cast malleable iron straps or structural steel with hot-dipped galvanized nuts and bolts.

1. Allied Support Systems, Power-Strut (www.power-strut.com).

2. Cooper B-Line (www.cooperbline.com).

3. Thomas & Betts Corporation, Superstrut (www.tnb.com).

4. Unistrut (www.unistrut.com).

B. Shielding Paint:

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1. Thomas & Betts “KopR-Shield” (www.tnb.com).

C. Sealant:

1. Dap, Inc. “Flexseal Two-Part Polysulfide Sealant” (www.dap.com).

2. Pecora Corp. “GC-S Synthacaulk” (www.pecora.com).

3. Sonneborn “Sonolastic Two Part” (www.sonneborn.com).

D. Fire stops and fire rated sealants:

1. Flamesafe (www.na.graceconstruction.com).

2. Nelson Fire Seal (www.nelsonfirestop.com).

3. 3M Company Fire Barrier (www.3m.com).

E. Thread Lubricant:

1. Crouse-Hinds STL (www.carlon.com).

F. Non-Metallic Snap Strap Conduit Wall Hangers and Non-Metallic Clamps: PVC body with pre-drilled screw holes. Provide stainless steel screws.

1. Carlon E978 and E977 Series (www.carlon.com).

G. Non-Metallic Solvent Cement: Solvent cement shall be per non-metallic manufacturer’s recommendation based on temperature of installation and specific non-metallic products.

1. Carlon (www.carlon.com).

PART 3 - EXECUTION

3.1 WIRING METHODS

A. Use the following raceway system, unless otherwise noted or indicated on the Drawings:

1. Distribution systems above 600 volt AC: Rigid steel conduit, except for installation in underground duct banks and cable trays.

2. Under floor slab on grade: Schedule 40, concrete encased.

B. Outdoors:

1. Exposed: Rigid steel conduit.

2. Underground: Rigid non-metallic conduit, Schedule 40, with rigid steel bends.

3. Underground Duct Bank: Rigid non-metallic conduit. Refer to Section 260543, “Underground

Electrical Service” for underground duct bank requirements.

C. Indoors:

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1. Exposed: Electrical metallic tubing, except for the following areas:

a. Rigid steel conduit:

2. Concealed in walls or above ceilings: Electrical metallic tubing.

3. Connection to Vibrating Equipment (Including Transformers and Hydraulic, Pneumatic, Electric

Solenoid, or Motor-Driven Equipment): Flexible steel conduit, except in wet or damp locations use liquid-tight flexible steel conduit.

4. Damp or Wet Locations: Rigid steel conduit.

3.2 INSTALLATION

A. Conduit - General:

1. Install conduit sizes as indicated. Where conduit sizes are not indicated, install sizes per NEC requirements, except do not use conduit sizes smaller than 3/4 inch (21 mm), unless otherwise specified. Use 1/2 inch (16 mm) fixture stems optionally, unless otherwise indicated.

2. All conduits to be installed parallel to or at right angle to walls and in an orderly manner.

3. Where conduit joints occur in concrete slabs, damp or wet locations or exposed to weather, make the joints watertight by applying a coating of thread lubricant to the entire conduit thread area before assembling. Use special care to insure that such joints are tight mechanically and that the lubricant application completely seals them against the entrance of moisture. Coat all field cut threads with thread lubricant.

4. For on-site cutting and threading, cut conduit square. Cut threads clean and true using proper size dies for conduit type being threaded. Thoroughly clean and ream all inside edges of the conduit to remove all burrs or sharp edges.

5. Where inside protective coating has been destroyed by the above operations, apply a suitable protective coating.

6. Conceal all conduits in finished areas either above ceilings or walls. Conduit shall not be installed in floors or in slabs on grade, unless otherwise specified or as indicated on the

Drawings.

7. Install conduit in mechanical rooms and similar spaces exposed, unless otherwise specified or indicated.

8. Deliver conduit to the project site in not less than 10 ft (3.0 m) lengths with each length of conduit having approved stamp of Underwriters Laboratory and manufacturer’s name and trademark.

9. Mechanically join together metal conduit, fittings, enclosures and raceways for conductors to form a continuous electrical conductor, and to provide effective electrical continuity and firm mechanical assembly.

10. Secure conduit in place by two locknuts and terminate with a bushing when conduit entering sheet metal enclosure and outlet boxes and not terminated in a threaded hub.

11. Clean conduit thoroughly and dry inner surfaces before conductors are installed. Remove and replace conduit found to be plugged or so exceptionally dirty that they cannot be satisfactorily cleaned. Install an approved type of conduit cap or plug on conduit installed for future use or

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use by other trades. Cap or plug and properly identify with metal tags empty conduit installed for future use.

12. Install pull boxes at least every 100 ft (30.5 m) in long conduit runs.

13. Complete installation of electrical raceways before starting installation of conductors within raceways.

14. Prevent foreign matter from entering raceways by using temporary closure protection.

15. Protect stub-ups from damage where conduits rise from floor slabs. Arrange so curved portion of bends is not visible above the finished slab.

16. Make bends and offsets so the inside diameter is not effectively reduced.

17. Install no more than the equivalent of three (3) 90 degree bends in any conduit run before providing an appropriately sized pull box.

B. Fittings:

1. Use only compression type fittings on EMT conduit. Set screw fittings are not permitted.

2. Cast body fitting are not permitted.

3. Install fittings compatible with conduit and suitable for use and location.

4. Join conduit system with fittings designed and approved for the purpose to make joints tight.

C. Expansion Fittings:

1. Install a conduit expansion fitting in each conduit run wherever it crosses an expansion joint in the structure to which it is attached. In addition, install an expansion fitting in each conduit run which is mechanically attached to separate structures. Install a bonding jumper or ground clamp to connect the conduits.

D. Bushings:

1. Install insulating bushings on conduit ends before the installation of any conductors.

2. Grounding bushings shall be installed on all flexible conduit at connections to boxes and/or equipment. They shall be installed where isolation of ground is required, such as at audio equipment feeds. Grounding bushings shall be installed on all metallic conduit where bare ground wires or cables are run.

E. Flexible Connections:

1. Use maximum of 6 ft (1.8 m) of flexible conduit for service to individual recessed fixtures, 1/2 inch (16 mm) minimum size, and for final connection to distribution transformers, motors and other equipment subject to vibration or movement. Install the flexible metallic conduit so that liquids will tend to run off the surface instead of draining toward the fitting.

F. Stub-Up Connections:

1. Extend conduits through concrete floor for connection to freestanding equipment. Install with an adjustable type of coupling threaded inside for plugs and set flush with the finished floor.

Extend conductors to equipment with rigid steel conduit; flexible steel conduit may be used

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6 inch (152 mm) above the equipment pad or floor. Install screwdriver-operated, threaded flush plugs flush with the equipment pad or floor for future equipment connections.

2. Arrange stub-ups so curved portions of bends are not visible above the finished floor.

G. Concealed Conduit:

1. Install concealed conduit and extensions from exposed conduit systems neatly parallel with or at right angles to the walls of the building.

2. Install conduit so as not to damage or run through structural members. Install sleeves where conduit runs through structural walls. Refer to Section 260500, “General Requirements, Electrical Work” for Cutting and Patching.

3. Avoid horizontal or cross runs in building type partitions or side walls.

H. Exposed Conduit:

1. Install exposed conduit and extensions from concealed conduit systems neatly parallel with or at right angles to the walls of the building.

2. Install exposed conduit work so as not to interfere with ceiling inserts, ceiling lights or ventilation outlets.

I. Sleeves:

1. Install sleeves as noted. Where conduits are to pass through floor slabs, and conduit slots are not provided, install rigid steel conduit sleeves of size as required for conduit or as indicated, and securely fasten in the concrete forms to avoid damage or movement of the sleeve at any time.

2. Install rigid steel conduit sleeves with bottom of sleeves flush with slab and top 3 inch

(76.2 mm) above finished floor.

3. Close and make watertight all open spaces around installed conduit with oakum and approved mastic. Support conduit at each level. Seal unused pipe sleeves. Provide approved mastic for fire stop and/or fire rated wall/floor penetration system at all floor and wall penetrations.

J. Pull Rope:

1. Install monofilament plastic line having a tensile strength of not less than 200 lbs (90 kg) with wooden blocks fastened to both ends in all empty electrical and telephone conduits. Leave at least 12 inch (305 mm) of slack at each end of pull rope.

K. Pull and Junction Boxes:

1. For junction or pull boxes not over 100 cubic inch (1639 cubic centimeter) in size use 4-

11/16 inch (119.5 mm) x 4-11/16 inch (119.5 mm) outlet boxes. For junction or pull boxes over 100 cubic inch (1639 cubic centimeter) in size construct same as cabinets with covers of same gauge metal as boxes and secure by screws or bolts. Use galvanized sheet steel boxes with metal thickness not less than No. 14 gauge. Size and install boxes per the latest edition of

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the NEC. Use junction boxes 4-11/16 inch (119.5 mm) square by 1-1/2 inch (38.1 mm) deep minimum. Install removable covers for access at all times.

2. Install pull or junction boxes so that conduit runs do not exceed three (3) 90 degree bends between boxes.

L. Wireways:

1. Install wireways complete with all required covers, hinges, couplings, end closures etc., as required.

M. Pull and Junction Boxes on Systems Over 600 Volts AC, Nominal:

1. Cover of boxes shall be permanently marked “DANGER HIGH VOLTAGE, KEEP OUT”.

Letters shall be block type at least 1/2 inch (12.7 mm) in height.

3.3 PROTECTION

A. Provide final protection and maintain conditions that ensure coatings, finishes, and boxes are without damage or deterioration.

1. Repair damage to galvanized finishes with zinc-rich paint recommended by manufacturer.

2. Repair damage to PVC or painted finishes with matching touchup coating recommended by manufacturer.

UNDERGROUND ELECTRICAL SERVICE

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SECTION 260543 - UNDERGROUND ELECTRICAL SERVICE

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and

Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Extent of underground work is indicated by Drawings and by requirements of this Section.

B. Provide all labor, materials, and equipment for below grade work as required, and furnish and install all equipment and material, including underground duct banks, direct burial conduit, manholes, handholes, lighting standard foundations, and concrete work for electrical work, as indicated or specified.

1.3 RELATED WORK SPECIFIED ELSEWHERE

A. Comply with applicable Sections of Division 03, “Cast-In-Place Concrete”.

B. Comply with applicable Sections of Division 07 for waterproofing cast-in-place concrete manholes and handholes.

C. Comply with applicable requirements of Section 260526, “Grounding”.

D. Comply with applicable requirements of Section 260529, “Hangers and Supports for Electrical

Systems”.

E. Comply with applicable requirements of Section 260533, “Raceways and Fittings”.

F. Comply with applicable requirements of Section 260553, “Identification for Electrical Systems”.

1.4 ABBREVIATIONS AND DEFINITIONS

A. AASHTO: American Association of State Highway and Transportation.

B. ANSI: American National Standard Institute.

C. ASTM: American Society for Testing and Materials.

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D. AWG: American Wire Gauge.

E. PVC: Polyvinyl Chloride.

1.5 QUALITY ASSURANCE

A. ANSI Compliance: Comply with requirements of ANSI C2, “National Electrical Safety Code”, pertaining to construction and installation of manholes and handholes.

1.6 SUBMITTALS

A. Product Data:

1. Conduit and ducts, including elbows, bell ends, bends and fittings.

2. Duct-bank materials, including spacers and miscellaneous components.

3. Pre-cast handholes.

4. Pre-cast manholes.

5. Manhole hardware.

6. Conduit and fittings for pole risers.

B. Shop Drawings: Submit shop drawings for approval. Shop Drawings shall be signed and sealed by a qualified professional engineer. Show fabrication and installation details for the following:

1. For manholes and handholes (pre-cast or cast-in place):

a. Duct entry locations, quantities, configurations and sizes.

b. Reinforcement details.

c. Step details.

d. Grounding details.

e. Dimensioned locations of cover, cable rack inserts, pulling-in irons and sump.

f. Design calculations.

g. Joint details.

C. Coordination Drawings: Submit coordination drawings for review. Drawings shall include detailed profiles and indicate coordination with other utilities and underground structures. Drawings shall include plans and sections drawn to scale, and show all bends and locations of expansion fittings.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver ducts to site with ends capped. Store non-metallic ducts with supports to prevent bending, warping and deforming.

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B. Store precast concrete units at site as recommended by manufacturer to prevent physical damage.

Arrange so identification markings are visible.

C. Lift and support precast concrete units at designated lifting or supporting points as recommended by manufacturer.

1.8 PROJECT CONDITIONS

A. Existing Utilities:

1. The Contractor shall thoroughly investigate and verify locations of all existing utilities in the area of construction. The Contractor shall provide temporary services as required for any electrical service being interrupted.

2. Any interruption of services shall be at a time approved in advanced by the Owner’s Engineer so as not to interfere with the present building operations. Contractor shall notify the Owner’s

Engineer of the electrical system involved, area affected and the duration of outage.

1.9 COORDINATION

A. Coordinate layout and installation of ducts, manholes, and handholes with final arrangement of all new and existing utilities and site grading, as determined in the field.

B. Coordinate elevations of ducts and duct-bank entrances into manholes, handholes and buildings with final profiles of conduits as determined by coordination with other utilities and underground obstructions. Revise locations an elevation from those indicated as required to suit field conditions and to ensure duct runs drain to manholes and handholes, and as approved by Architect.

1.10 WARRANTY

A. Manufacturer shall warranty equipment to be free from defects in material and workmanship for one

(1) year from date of Owner’s acceptance.

B. Installation contractor shall warranty installation to be free from defects in material and workmanship for one (1) year from date of Owner’s acceptance.

PART 2 - PRODUCTS

2.1 UNDERGROUND DUCT-CONCRETE ENCASED

A. Plastic Conduit: Rigid PVC conduit, Type EB-35 in standard lengths with tapered ends and matching solvent-weld type couplings.

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1. Cantex (www.cantexinc.com).

2. Carlon (www.carlon.com).

3. National Pipe (www.nationalpipe.com).

B. Rigid Steel Conduit: As specified in Section 260533, “Raceways and Fittings”.

2.2 CONDUIT AND FITTINGS FOR POLE RISERS

A. Conduit: Rigid steel, as specified in Section 260533, “Raceways and Fittings”.

B. Cable Support Fittings: Ventilating sealing bushing type for use with one or more single conductor insulated cables, cadmium or zinc-plated, malleable iron, with properly sized neoprene sealing gaskets for sealing around each insulated conductor.

1. O-Z Electrical Mfg. Co., Inc., Type CMT (www.o-zgedney.com).

2.3 PRE-CAST HANDHOLES

A. Fabrication:

1. Provide precast type manholes consisting of interlocking reinforced concrete sections having interior clear dimensions not less than indicated, designed to meet or exceed AASHTO HS20 traffic loading, complete with double seals at intersections, duct terminators with diaphragm as indicated, pulling irons opposite duct faces and in center of floor, opening for ground rod, equipment mounting means, cable rack, rack supports, hooks, insulators, sump, grade ring riser casting, manhole lid tool (hook), pentagon head socket-wrench for frame and cover security bolts, 30 inch (762 mm) manhole cover with the word “ELECTRIC” for electric manholes cast in center, and means for securing concrete throat and manhole cover frame to the reinforcing steel in the roof of the manhole.

2. Concrete shall be high-early type having a minimum compressive strength of 4500 PSI

(31.0 MPa).

3. Provide grade 60 reinforcing per Bell Laboratory Specification, bonded together, and provided with strapping exposed in the manhole for connection to the grounding system.

B. Approved Manufacturer:

1. Oldcastle Precast, Hartford Concrete (www.oldcastleprecast.com).

2. Advance Concrete Products (www.advanceconcreteproducts.com).

3. Oldcastle Precast, Superior Concrete (www.oldcastleprecast.com).

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2.4 FRAMES AND LIDS FOR ELECTRICAL AND TELEPHONE CAST-IN-PLACE HANDHOLES

A. Frame and Lid: Close grained gray cast iron to meeting the requirements of the current standard specifications for Gray Iron Castings (Class 30) ASTM A48. Provide 30 inch (762 mm) diameter minimum opening in the frame with approximately 10 inch (254 mm) high frame and with a flange of outside diameter not less than 49 inch (1244 mm). Provide lid designed for heavy traffic with two pentagon head special monel security bolts. Provide two wrenches for installation and removal of security bolts. Inscribe the word “ELECTRIC” on electric manhole covers.

1. Neenah No. R-1640-C (www.neenahfoundry.com).

2. East Jordan Iron Works (www.ejiw.com).

B. Drainage Grates: 12-5/8 inch (321 mm) diameter, 2-1/2 inch (63.5 mm) thick.

1. Neenah R-4030 (www.neenahfoundry.com).

2. East Jordan Iron Works (www.ejiw.com).

C. Side Outlet Drains: 4 inch (102 mm) galvanized cast iron with back water valve.

1. Boosey Co. 450-FV.

D. Drains: Extra strength vitrified clay tile C-200.

2.5 CABLE RACKS, HOOKS, AND INSULATORS FOR PRIMARY DISTRIBUTION MANHOLES

A. Cable Racks: Heavy duty, non-metallic, underground type.

1. Underground Devices Inc., CR36 (www.udevices.com).

B. Hooks: Heavy duty, to fit racks furnished.

1. Line Material DU1S1 through DU124 (www.cooperpower.com).

C. Insulators: White glaze porcelain, to fit hooks furnished.

D. Cable Support Arms: Heavy duty, non-metallic, to fit racks furnished.

1. Underground Devices Inc., Cat. No. RA08 (www.udevices.com).

E. Cable Stanchions:

1. Stanchions consisting of hot-dipped galvanized Unistrut P-1001-HG channels, P-1603 porcelain cable saddle brackets and white glazed porcelain insulators (www.unistrut.com).

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2.6 MISCELLANEOUS HARDWARE FOR MANHOLES

A. Pulling-In Irons: 7/8 inch (22.2 mm) round hot-dip galvanized, welded to reinforcing rods during fabrication.

1. Cooper Industries.

B. Ladders: Hot dipped galvanized with hook ends.

1. Line Material DV2L1 (www.cooperpower.com).

C. Steps: Depressed rung steps.

1. Line Material DU1R1 (www.cooperpower.com).

2.7 MISCELLANEOUS MATERIALS

A. Duct Spacers: Preformed rigid PVC interlocking spacers, selected to provide minimum duct spacing and cover depths indicated while supporting ducts during concreting and backfilling; produced by the same manufacturer as the ducts.

B. PVC Solvent Cement:

1. Carlon (www.carlon.com).

C. Backfill Materials:

1. Comply with applicable Sections of Division 31 for backfill material requirements.

D. Underground Warning Tape:

1. Permanent bright colored, continuous printed, vinyl tape.

2. Not less than 4 inch (102 mm) wide x 4 mils thick.

3. Compounded for permanent direct burial use.

4. Embedded continuous metallic strip or core for future use to locate ducts.

5. Printed legend to indicate type of underground service.

2.8 DUCT/CABLE SEALS

A. All below grade exterior wall conduit penetrations shall be sealed watertight; this shall include all conduits in-use, and spare / empty conduits. The assembly shall be approved for use with plastic or steel conduit systems and be easily removable without damage to the conduit.

B. The seal shall be sized and selected and installed per the manufacturer’s literature and recommendation for the conduit type, size, and quantity of cables identified on the construction documents. Verify each

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conduit’s specific requirement prior to procurement and installation, and provide all necessary materials and tools as recommended by the manufacturer.

1. Manufacturer:

a. Link-Seal (www.linkseal.com).

b. Roxtec, Rox System (www.roxtec.com).

c. Raychem “Rayflate Duct Sealing System (RDSS)” (www.tycothermal.com).

PART 3 - EXECUTION

3.1 INSTALLATION

A. General: Refer to applicable Sections of Division 31 for definition of materials, description of testing services, and requirements for excavation, filling, compaction, and other applicable requirements.

B. Preparation: Start pavement removal with minimum 1-1/2 inch (38.1 mm) deep saw cut to provide neat straight lines.

C. Conduit and Manhole Drain Pipe Bedding and Backfilling:

1. Backfill and compact with materials and methods in accordance with applicable Sections of

Division 31.

2. Exercise special care in compacting first layer of backfill over electrical duct lines.

D. Excavation: Perform all excavation in accordance with applicable Sections of Division 31.

E. Restoring Surfaces:

1. Restore street pavements, curbs, and sidewalks that have been opened in performance of the

Work. Restoration work shall be in accordance…