Atch_4_Specification_Section_33_71_02,_Underground_Electrical_Distribution.pdf

SECTION 33 71 02

UNDERGROUND ELECTRICAL DISTRIBUTION

02/15

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this s pecification to the extent referenced. The publications are referred t o within the text by the basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO HB-17 (2002; Errata 2003; Errata 2005, 17th Edition) Standard Specifications for Highway Bridges

AMERICAN CONCRETE INSTITUTE INTERNATIONAL (ACI)

ACI 318M (2014; ERTA 2015) Building Code Requirements for Structural Concrete & Commentary

ACI SP-66 (2004) ACI Detailing Manual

AMERICAN WELDING SOCIETY (AWS)

AWS D1.1/D1.1M (2015; Errata 1 2015; Errata 2 2016) Structural Welding Code - Steel

ASSOCIATION OF EDISON ILLUMINATING COMPANIES (AEIC)

AEIC CS8 (2013) Specification for Extruded Dielectric Shielded Power Cables Rated 5 Through 46 kV

ASTM INTERNATIONAL (ASTM)

ASTM A48/A48M (2003; R 2012) Standard Specification for Gray Iron Castings

ASTM B1 (2013) Standard Specification for Hard-Drawn Copper Wire

ASTM B231/B231M (2012) Standard Specification for Concentric-Lay-Stranded Aluminum 1350 Conductors

ASTM B3 (2013) Standard Specification for Soft or Annealed Copper Wire

ASTM B400/B400M (2008; E 2013) Standard Specification for

Compact Round Concentric-Lay-Stranded Aluminum 1350 Conductor

ASTM B496 (2016) Standard Specification for Compact Round Concentric-Lay-Stranded Copper Conductors

ASTM B609/B609M (2012; E 2015) Standard Specification for Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical purposes

ASTM B8 (2011; R 2017) Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft

ASTM B800 (2005; R 2011) Standard Specification for 8000 Series Aluminum Alloy Wire for Electrical Purposes-Annealed and Intermediate Tempers

ASTM B801 (2016) Standard Specification for Concentric-Lay-Stranded Conductors of 8000 Series Aluminum Alloy for Subsequent Covering or Insulation

ASTM C139 (2014) Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes

ASTM C309 (2011) Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete

ASTM C32 (2013) Standard Specification for Sewer and Manhole Brick (Made from Clay or Shale)

ASTM C478 (2015a) Standard Specification for Precast Reinforced Concrete Manhole Sections

ASTM C478M (2015a) Standard Specification for Precast Reinforced Concrete Manhole Sections (Metric)

ASTM C857 (2016) Standard Practice for Minimum Structural Design Loading for Underground Precast Concrete Utility Structures

ASTM C990 (2009; R 2014) Standard Specification for Joints for Concrete Pipe, Manholes and Precast Box Sections Using Preformed Flexible Joint Sealants

ASTM C990M (2009; R 2014) Standard Specification for Joints for Concrete Pipe, Manholes and Precast Box Sections Using Preformed Flexible Joint Sealants (Metric)

ASTM F2160 (2016) Standard Specification for Solid Wall High Density Polyethylene (HDPE) Conduit Based on Controlled Outside Diameter (OD)

ASTM F512 (2012; R 2017) Standard Specification for Smooth-Wall Poly (Vinyl Chloride) (PVC) Conduit and Fittings for Underground Installation

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS ( IEEE)

IEEE 386 (2016) Separable Insulated Connector Systems for Power Distribution Systems Rated 2.5 kV through 35 kV

IEEE 400.2 (2013) Guide for Field Testing of Shielded Power Cable Systems Using Very Low Frequency (VLF)

IEEE 404 (2012) Standard for Extruded and Laminated Dielectric Shielded Cable Joints Rated 2500 V to 500,000 V

IEEE 48 (2009) Standard for Test Procedures and Requirements for Alternating-Current Cable Terminations Used on Shielded Cables Having Laminated Insulation Rated 2.5 kV through 765 kV or Extruded Insulation Rated 2.5 kV through 500 kV

IEEE 495 (2007) Guide for Testing Faulted Circuit Indicators

IEEE 81 (2012) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

IEEE C2 (2017; Errata 1 2017) National Electrical Safety Code

IEEE C37.20.3 (2013) Standard for Metal-Enclosed Interrupter Switchgear

IEEE Stds Dictionary (2009) IEEE Standards Dictionary: Glossary of Terms & Definitions

INSULATED CABLE ENGINEERS ASSOCIATION (ICEA)

ICEA S-94-649 (2013) Standard for Concentric Neutral Cables Rated 5 Through 46 KV

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2017) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

ANSI C119.1 (2011) Electric Connectors - Sealed Insulated Underground Connector Systems Rated 600 Volts

ANSI/NEMA WC 71/ICEA S-96-659 (2014) Standard for Nonshielded Cables Rated 2001-5000 Volts for use in the Distribution of Electric Energy

NEMA C119.4 (2011) Electric Connectors - Connectors for Use Between Aluminum-to-Aluminum or Aluminum-to-Copper Conductors Designed for Normal Operation at or Below 93 Degrees C and Copper-to-Copper Conductors Designed for Normal Operation at or Below 100 Degrees C

NEMA RN 1 (2005; R 2013) Polyvinyl-Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit

NEMA TC 2 (2013) Standard for Electrical Polyvinyl Chloride (PVC) Conduit

NEMA TC 3 (2016) Polyvinyl Chloride (PVC) Fittings for Use With Rigid PVC Conduit and Tubing

NEMA TC 6 & 8 (2013) Standard for Polyvinyl Chloride (PVC) Plastic Utilities Duct for Underground Installations

NEMA TC 7 (2016) Smooth-Wall Coilable Electrical Polyethylene Conduit

NEMA TC 9 (2004) Standard for Fittings for Polyvinyl Chloride (PVC) Plastic Utilities Duct for Underground Installation

NEMA WC 70 (2009) Power Cable Rated 2000 V or Less for the Distribution of Electrical Energy--S95-658

NEMA WC 74/ICEA S-93-639 (2012) 5-46 kV Shielded Power Cable for Use in the Transmission and Distribution of Electric Energy

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017; ERTA 1-2 2017; TIA 17-1; TIA 17-2)

National Electrical Code

SOCIETY OF CABLE TELECOMMUNICATIONS ENGINEERS (SCTE)

ANSI/SCTE 77 (2013) Specification for Underground Enclosure Integrity

TELECOMMUNICATIONS INDUSTRY ASSOCIATION (TIA)

TIA-758 (2012b) Customer-Owned Outside Plant Telecommunications Infrastructure Standard

U.S. DEPARTMENT OF AGRICULTURE (USDA)

RUS Bull 1751F-644 (2002) Underground Plant Construction

U.S. GENERAL SERVICES ADMINISTRATION (GSA)

CID A-A-60005 (Basic; Notice 2) Frames, Covers, Gratings, Steps, Sump And Catch Basin, Manhole

UNDERWRITERS LABORATORIES (UL)

UL 1072 (2006; Reprint Jun 2013) Medium-Voltage Power Cables

UL 1242 (2006; Reprint Mar 2014) Standard for Electrical Intermediate Metal Conduit -- Steel

UL 44 (2014; Reprint Feb 2015) Thermoset-Insulated Wires and Cables

UL 467 (2013; Reprint Jun 2017) UL Standard for Safety Grounding and Bonding Equipment

UL 486A-486B (2013; Reprint Jan 2016) Wire Connectors

UL 510 (2017) UL Standard for Safety Polyvinyl Chloride, Polyethylene and Rubber Insulating Tape

UL 514A (2013) Metallic Outlet Boxes

UL 514B (2012; Reprint Nov 2014) Conduit, Tubing and Cable Fittings

UL 6 (2007; Reprint Nov 2014) Electrical Rigid Metal Conduit-Steel

UL 651 (2011; Reprint Jun 2016) UL Standard for Safety Schedule 40 and 80 Rigid PVC Conduit and Fittings

UL 83 (2014) Thermoplastic-Insulated Wires and Cables

UL 854 (2004; Reprint Nov 2014) Standard for Service-Entrance Cables

UL 94 (2013; Reprint Mar 2016) UL Standard for Safety Tests for Flammability of Plastic Materials for Parts in Devices and

Appliances

1.2 RELATED REQUIREMENTS

Section 26 08 00 APPARATUS INSPECTION AND TESTING applies to this s ection, with the additions and modifications specified here in.

1.3 DEFINITIONS

a. Unless otherwise specified or indicated, electr ical and electronics terms used in these specifications, and on the draw ings, are as defined in IEEE Stds Dictionary .

b. In the text of this section, the words conduit and duct are used interchangeably and have the same meaning.

c. In the text of this section, "medium voltage ca ble splices," and "medium voltage cable joints" are used interchangea bly and have the same meaning.

d. Underground structures subject to aircraft load ing are indicated on the drawings.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation i dentifies the office that will review the submittal for the Government. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Precast underground structures ; G

SD-03 Product Data

Medium voltage cable ; G

Medium voltage cable joints ; G

Medium voltage cable terminations ; G

Live end caps ; G

Precast concrete structures ; G

Sealing Material

Pulling-In Irons

Manhole frames and covers ; G

Handhole frames and covers ; G

Frames and Covers for Airfield Facilities ; G

Ductile Iron Frames and Covers for Airfield Facilit ies ; G

Composite/fiberglass handholes ; G

Cable supports (racks, arms and insulators); G

The study must be submitted with protective devic e equipment submittals. No time extension or similar contract modifications will be granted for work arising out of the require ments for this study. Approval of protective devices proposed mus t be based on recommendations of this study. The Government must not be held responsible for any changes to equipment, device ra tings, settings, or additional labor for installation of e quipment or devices ordered or procured prior to approval of th e study.

SD-06 Test Reports

Medium voltage cable qualification and production t ests ; G

Field Acceptance Checks and Tests ; G

Arc-proofing test for cable fireproofing tape; G

Cable Installation Plan and Procedure ; G

Six copies of the information described below in 8-1/2 by 11 inch binders having a minimum of three rings from which material may readily be removed and replaced, including a separa te section for each cable pull. Separate sections by heavy plasti c dividers with tabs, with all data sheets signed and dated by the person supervising the pull.

a. Site layout drawing with cable pulls numerica lly identified.

b. A list of equipment used, with calibration ce rtifications.

The manufacturer and quantity of lubricant used on pull.

c. The cable manufacturer and type of cable.

d. The dates of cable pulls, time of day, and am bient temperature.

e. The length of cable pull and calculated cable pulling tensions.

f. The actual cable pulling tensions encountered during pull.

SD-07 Certificates

Cable splicer/terminator ; G

Cable Installer Qualifications ; G

1.5 QUALITY ASSURANCE

1.5.1 Precast Underground Structures

Submittal required for each type used. Provide cal culations and drawings for precast manholes and handholes bearing the seal of a registered professional engineer including:

a. Material description (i.e., f'c and Fy)

b. Manufacturer's printed assembly and installatio n instructions

c. Design calculations

d. Reinforcing shop drawings in accordance with ACI SP-66

e. Plans and elevations showing opening and pullin g-in iron locations and details

1.5.2 Certificate of Competency for Cable Splicer/Terminator

The cable splicer/terminator must have a certificat ion from the National Cable Splicing Certification Board (NCSCB) in the f ield of splicing and terminating shielded medium voltage (5 kV to 35 kV) power cable using pre-manufactured kits (pre-molded, heat-shrink, col d shrink). Submit "Proof of Certification" for approval, for the indi viduals that will be performing cable splicer and termination work, 30 d ays before splices or terminations are to be made.

Certification of the qualification of the cable spl icer/terminator shall be submitted, for approval, 30 days before splices or terminations are to be made in medium voltage (5 kV to 35 kV) cables. The certification shall include the training, and experience of the individ ual on the specific type and classification of cable to be provided under th is contract. The certification shall indicate that the individual ha s had three or more years recent experience splicing and terminating me dium voltage cables.

The certification shall also list a minimum of thre e splices/terminations that have been in operation for more than one year. In addition, the individual may be required to perform a dummy or pr actice splice/termination in the presence of the Contracti ng Officer, before being approved as a qualified cable splicer. If that add itional requirement is imposed, the Contractor shall provide short section s of the approved types of cables along with the approved type of splice/te rmination kit, and detailed manufacturer's instructions for the cable to be spliced. The Contracting Officer reserves the right to require a dditional proof of competency or to reject the individual and call for certification of an alternate cable splicer.

1.5.3 Cable Installer Qualifications

Provide at least one onsite person in a supervisory position with a documentable level of competency and experience to supervise all cable pulling operations. Provide a resume showing the c able installers' experience in the last three years, including a lis t of references complete with points of contact, addresses and telephone num bers. Cable installer must demonstrate experience with a minimum of three medium voltage cable installations. The Contracting Officer reserves th e right to require additional proof of competency or to reject the ind ividual and call for an alternate qualified cable installer.

1.5.4 Regulatory Requirements

In each of the publications referred to herein, con sider the advisory provisions to be mandatory, as though the word, "mu st" had been substituted for "should" wherever it appears. Interpret refere nces in these publications to the "authority having jurisdiction, " or words of similar meaning, to mean the Contracting Officer. Equipmen t, materials, installation, and workmanship must be in accordance with the mandatory and advisory provisions of IEEE C2 and NFPA 70 unless more stringent requirements are specified or indicated.

1.5.5 Standard Products

Provide materials and equipment that are products o f manufacturers regularly engaged in the production of such product s which are of equal material, design and workmanship. Products must ha ve been in satisfactory commercial or industrial use for 2 years prior to b id opening. The 2-year period must include applications of equipment and m aterials under similar circumstances and of similar size. The product mus t have been for sale on the commercial market through advertisements, manuf acturers' catalogs, or brochures during the 2-year period. Where two or m ore items of the same class of equipment are required, these items must b e products of a single manufacturer; however, the component parts of the i tem need not be the products of the same manufacturer unless stated in this section.

1.5.5.1 Alternative Qualifications

Products having less than a 2-year field service re cord will be acceptable if a certified record of satisfactory field operati on for not less than 6000 hours, exclusive of the manufacturers' factory or laboratory tests, is furnished.

1.5.5.2 Material and Equipment Manufacturing Date

Products manufactured more than 3 years prior to da te of delivery to site are not acceptable, unless specified otherwise.

PART 2 PRODUCTS

2.1 CONDUIT, DUCTS, AND FITTINGS

2.1.1 Rigid Metal Conduit

UL 6 .

2.1.1.1 Rigid Metallic Conduit, PVC Coated

NEMA RN 1, Type A40, except that hardness must be nominal 85 Shore A durometer, dielectric strength must be minimum 400 volts per mil at 60 Hz, and tensile strength must be minimum 3500 psi .

2.1.2 Intermediate Metal Conduit

UL 1242 .

2.1.2.1 Intermediate Metal Conduit, PVC Coated

NEMA RN 1, Type A40, except that hardness must be nominal 85 Shore A durometer, dielectric strength must be minimum 400 volts per mil at 60 Hz, and tensile strength must be minimum 3500 psi .

2.1.3 Plastic Conduit for Direct Burial and Riser Applications

UL 651 and NEMA TC 2, EPC-40 or EPC-80 as indicated.

2.1.4 Plastic Duct for Concrete Encasement

Provide Type EB-35 per UL 651 , ASTM F512, and NEMA TC 6 & 8 or Type EPC-40 per UL 651 and NEMA TC 2, as indicated.

2.1.5 High Density Polyethylene (HDPE) Electrical Conduit for Directional Boring

Smoothwall, approved/listed for directional boring, minimum Schedule 80, ASTM F2160, NEMA TC 7.

2.1.6 Innerduct

Provide corrugated polyethylene (PE) or PVC innerdu cts, or fabric-mesh innerducts, with pullwire. Size as indicated.

2.1.7 Duct Sealant

UL 94 , Class HBF. Provide high-expansion urethane foam duct sealant that expands and hardens to form a closed, chemically an d water resistant, rigid structure. Sealant must be compatible with common cable and wire jackets and capable of adhering to metals, plastics and con crete. Sealant must be capable of curing in temperature ranges of 35 degrees F to 95 degrees F .

Cured sealant must withstand temperature ranges of -20 degrees F to 200 degrees F without loss of function.

2.1.8 Fittings

2.1.8.1 Metal Fittings

UL 514B .

2.1.8.2 PVC Conduit Fittings

UL 514B , UL 651 .

2.1.8.3 PVC Duct Fittings

NEMA TC 9.

2.1.8.4 Outlet Boxes for Steel Conduit

Outlet boxes for use with rigid or flexible steel c onduit must be cast-metal cadmium or zinc-coated if of ferrous met al with gasketed closures and must conform to UL 514A .

2.2 LOW VOLTAGE INSULATED CONDUCTORS AND CABLES

Insulated conductors must be rated 600 volts and co nform to the requirements of NFPA 70 , including listing requirements. Wires and cables manufactured more than 24 months prior to date of d elivery to the site are not acceptable. Service entrance conductors must c onform to UL 854 , type

USE.

2.2.1 Conductor Types

Cable and duct sizes indicated are for copper condu ctors and THHN/THWN unless otherwise noted. Conductors No. 10 AWG and smaller must be solid.

Conductors No. 8 AWG and larger must be stranded. All conductors must be copper.

2.2.2 Conductor Material

Unless specified or indicated otherwise or required by NFPA 70 , wires in conduit, other than service entrance, must be 600-v olt, Type THWN/THHN conforming to UL 83 or Type XHHW conforming to UL 44 . Copper conductors must be annealed copper complying with ASTM B3 and ASTM B8.

2.2.3 Jackets

Multiconductor cables must have an overall PVC oute r jacket.

2.2.4 In Duct

Cables must be single-conductor cable. Cables in f actory-installed, coilable-plastic-duct assemblies must conform to NEMA TC 7.

2.2.5 Cable Marking

Insulated conductors must have the date of manufact ure and other identification imprinted on the outer surface of ea ch cable at regular intervals throughout the cable length.

Identify each cable by means of a fiber, laminated plastic, or non-ferrous metal tags, or approved equal, in each manhole, han dhole, junction box, and each terminal. Each tag must contain the following information; cable type, conductor size, circuit number, circuit volta ge, cable destination and phase identification.

Conductors must be color coded. Provide conductor identification within each enclosure where a tap, splice, or termination is made. Conductor identification must be by color-coded insulated con ductors, plastic-coated self-sticking printed markers, colored nylon cable ties and plates, heat shrink type sleeves,or colored electrical tape. Co ntrol circuit terminations must be properly identified. Color mu st be green for grounding conductors and white for neutrals; except where neutrals of more than one system are installed in same raceway or bo x, other neutrals must be white with a different colored (not green) strip e for each. Color of ungrounded conductors in different voltage systems must be as follows:

a. 208/120 volt, three-phase

(1) Phase A - black

(2) Phase B - red

(3) Phase C - blue

b. 480/277 volt, three-phase

(1) Phase A - brown

(2) Phase B - orange

(3) Phase C - yellow

c. 120/240 volt, single phase: Black and red

d. On three-phase, four-wire delta system, high le g must be orange, as required by NFPA 70 .

2.3 LOW VOLTAGE WIRE CONNECTORS AND TERMINALS

Must provide a uniform compression over the entire conductor contact surface. Use solderless terminal lugs on stranded conductors.

a. For use with copper conductors: UL 486A-486B .

2.4 LOW VOLTAGE SPLICES

Provide splices in conductors with a compression co nnector on the conductor and by insulating and waterproofing using one of th e following methods which are suitable for continuous submersion in wat er and comply with

ANSI C119.1 .

2.4.1 Heat Shrinkable Splice

Provide heat shrinkable splice insulation by means of a thermoplastic adhesive sealant material applied in accordance wit h the manufacturer's written instructions.

2.4.2 Cold Shrink Rubber Splice

Provide a cold-shrink rubber splice which consists of EPDM rubber tube which has been factory stretched onto a spiraled co re which is removed during splice installation. The installation must not require heat or flame, or any additional materials such as covering or adhesive. It must be designed for use with inline compression type co nnectors, or indoor, outdoor, direct-burial or submerged locations.

2.5 MEDIUM VOLTAGE CABLE

Cable (conductor) sizes are designated by American Wire Gauge (AWG) and Thousand Circular Mils (Kcmil). Conductor and cond uit sizes indicated are for copper conductors unless otherwise noted. Insu lated conductors must have the date of manufacture and other identificati on imprinted on the outer surface of each cable at regular intervals th roughout cable length.

Wires and cables manufactured more than 24 months p rior to date of delivery to the site are not acceptable. Provide single con ductor type cables unless otherwise indicated.

2.5.1 Cable Configuration

Provide Type MV cable, conforming to NEMA WC 74/ICEA S-93-639 and UL 1072 concentric neutral underground distribution cable c onforming to ICEA S-94-649 metallic armored cables, consisting of three-conduc tor, multi-conductor cables, with insulation and shieldi ng, as specified, using an aluminum interlocked tape armor and thermoplasti c jacket . Provide cables manufactured for use in duct applications as indicated. Cable must be rated 15 kV as indicated with 133 percent insulation level.

2.5.2 Conductor Material

Provide concentric-lay-stranded, Class B compact ro und conductors. Provide soft drawn copper cables complying with ASTM B3 and ASTM B8 for regular concentric and compressed stranding or ASTM B496 for compact stranding.

2.5.3 Insulation

Provide ethylene-propylene-rubber (EPR) insulation conforming to the requirements of ANSI/NEMA WC 71/ICEA S-96-659 and AEIC CS8 .

2.5.4 Shielding

Cables rated for 2 kV and above must have a semicon ducting conductor shield, a semiconducting insulation shield, and an overall copper wire shield for each phase.

2.5.5 Neutrals

Neutral conductors must be copper, employing the sa me insulation and jacket materials as phase conductors, except that a 600-vo lt insulation rating is acceptable. Concentric neutrals conductors must be copper, havi ng a combined ampacity equal to the phase conductor ampacity rati ng.

2.5.6 Jackets

Provide cables with a PVC jacket. Provide PVC jackets with a separator that prevents contact with underlying semiconductin g insulating shield.

2.6 MEDIUM VOLTAGE CABLE TERMINATIONS

IEEE 48 Class 1; of the molded elastomer, prestretched ela stomer, or heat-shrinkable elastomer. Acceptable elastomers a re track-resistant silicone rubber or track-resistant ethylene propyle ne compounds, such as ethylene propylene rubber or ethylene propylene die ne monomer. Separable insulated connectors may be used for apparatus term inations, when such apparatus is provided with suitable bushings. Termi nations, where required, must be provided with mounting brackets suitable fo r the intended installation and with grounding provisions for the cable shielding, metallic sheath, or armor. Terminations must be pr ovided in a kit, including: skirts, stress control terminator, groun d clamp, connectors, lugs, and complete instructions for assembly and in stallation.

Terminations must be the product of one manufacture r, suitable for the type, diameter, insulation class and level, and mat erials of the cable terminated. Do not use separate parts of copper or copper alloy in contact with aluminum alloy parts in the construction or in stallation of the terminator.

2.6.1 Cold-Shrink Type

Terminator must be a one-piece design, utilizing th e manufacturer's latest technology, where high-dielectric constant (capacit ive) stress control is integrated within a skirted insulator made of silic one rubber. Termination must not require heat or flame for installation. T ermination kit must contain all necessary materials (except for the lug s). Termination must be designed for installation in low or highly contamin ated indoor and outdoor locations and must resist ultraviolet rays and oxid ative decomposition.

2.6.2 Heat Shrinkable Type

Terminator must consist of a uniform cross section heat shrinkable polymeric construction stress relief tubing and env ironmentally sealed outer covering that is nontracking, resists heavy a tmospheric contaminants, ultra violet rays and oxidative decomposition. Pro vide heat shrinkable sheds or skirts of the same material. Termination must be designed for installation in low or highly contaminated indoor o r outdoor locations.

2.6.3 Separable Insulated Connector Type

IEEE 386 . Provide connector with steel reinforced hook-sti ck eye, grounding eye, test point, and arc-quenching contac t material. Provide connectors of the loadbreak or deadbreak type as in dicated, of suitable construction for the application and the type of ca ble connected, and that include cable shield adaptors. Provide external cl amping points and test points. Separable connectors must not be used in m anholes/handholes.

a. 200 Ampere loadbreak connector ratings: Voltag e: 15 kV, 95 kV BIL.

Short time rating: 10,000 rms symmetrical amperes.

b. 600 Ampere deadbreak connector ratings: Voltag e: 15 kV, 95 kV BIL.

Short time rating: 25,000 rms symmetrical amperes. Connectors must have 200 ampere bushing interface for surge arreste rs as indicated.

c. Provide one set of three grounding elbows and o ne set of three feed-thru inserts. Deliver grounding elbows and fe ed-thru inserts to the Contracting Officer.

d. Install one set of faulted circuit indicators o n the test points of each set of separable insulated connectors. Faulte d circuit indicators must comply with IEEE 495 . Indicators must be self powered; with automatic trip with mechanical flag indication upon overcurrent followed by loss of system voltage, and automatic r eset upon restoration of system voltage. Indicators must be compact, sealed corrosion resistant construction with provision for hotstick installation and operation.

2.7 MEDIUM VOLTAGE CABLE JOINTS

Provide joints (splices) in accordance with IEEE 404 suitable for the rated voltage, insulation level, insulation type, and con struction of the cable.

Joints must be certified by the manufacturer for wa terproof, submersible applications. Upon request, supply manufacturer's design qualification test report in accordance with IEEE 404 . Connectors for joint must be tin-plated electrolytic copper, having ends tapered and having center stops to equalize cable insertion.

2.7.1 Heat-Shrinkable Joint

Consists of a uniform cross-section heat-shrinkable polymeric construction with a linear stress relief system, a high dielectr ic strength insulating material, and an integrally bonded outer conductor layer for shielding.

Replace original cable jacket with a heavy-wall hea t-shrinkable sleeve with hot-melt adhesive coating.

2.7.2 Cold-Shrink Rubber-Type Joint

Joint must be of a cold shrink design that does not require any heat source for its installation. Splice insulation and jacket must be of a one-piece factory formed cold shrink sleeve made of black EPD M rubber. Splice must be packaged three splices per kit, including comple te installation instructions.

2.8 TELECOMMUNICATIONS CABLING

Provide telecommunications cabling in accordance wi th Section 33 82 00

TELECOMMUNICATIONS OUTSIDE PLANT (OSP).

2.9 LIVE END CAPS

Provide live end caps using a "kit" including a hea t-shrinkable tube and a high dielectric strength, polymeric plug overlappin g the conductor. End cap must conform to applicable portions of IEEE 48 .

2.10 TAPE

2.10.1 Insulating Tape

UL 510 , plastic insulating tape, capable of performing in a continuous temperature environment of 80 degrees C.

2.10.2 Buried Warning and Identification Tape

Provide detectable tape in accordance with Section 31 00 00 EARTHWORK.

2.10.3 Fireproofing Tape

Provide tape composed of a flexible, conformable, u nsupported intumescent elastomer. Tape must be not less than .030 inch thick, noncorrosive to cable sheath, self-extinguishing, noncombustible, a dhesive-free, and must not deteriorate when subjected to oil, water, gases , salt water, sewage, and fungus.

2.11 PULL ROPE

Plastic or flat pull line (bull line) having a mini mum tensile strength of 200 pounds .

2.12 GROUNDING AND BONDING

2.12.1 Driven Ground Rods

Provide copper-clad steel ground rods conforming to UL 467 not less than 3/4 inch in diameter by 10 feet in length. Sectional type rods may be used for rods 20 feet or longer.

2.12.2 Grounding Conductors

Stranded-bare copper conductors must conform to ASTM B8, Class B, soft-drawn unless otherwise indicated. Solid-bare copper conductors must conform to ASTM B1 for sizes No. 8 and smaller. Insulated conductors must be of the same material as phase conductors and gre en color-coded, except that conductors must be rated no more than 600 volt s. Aluminum is not acceptable.

2.13 CAST-IN-PLACE CONCRETE

Provide concrete in accordance with Section 03 30 00 CAST-IN-PLACE CONCRETE.

In addition, provide concrete for encasement of und erground ducts with 3000 psi minimum 28-day compressive strength. Concrete ass ociated with electrical work for other than encasement of underg round ducts must be 4000 psi minimum 28-day compressive strength unless specifi ed otherwise.

2.14 UNDERGROUND STRUCTURES

Provide precast concrete underground structures or standard type cast-in-place manhole types as indicated, conformin g to ASTM C857 and ASTM C478. Top, walls, and bottom must consist of reinforce d concrete.

Walls and bottom must be of monolithic concrete con struction. Locate duct entrances and windows near the corners of structure s to facilitate cable racking. Covers must fit the frames without undue play. Form steel and iron to shape and size with sharp lines and angles. Castings must be free from warp and blow holes that may impair strength o r appearance. Exposed metal must have a smooth finish and sharp lines and arises. Provide necessary lugs, rabbets, and brackets. Set pulling -in irons and other built-in items in place before depositing concrete. Install a pulling-in iron in the wall opposite each duct line entrance. Cable racks, including rack arms and insulators, must be adequate to accom modate the cable.

2.14.1 Cast-In-Place Concrete Structures

Concrete must conform to Section 03 30 00 CAST-IN-PLACE CONCRETE.

Construct walls on a footing of cast-in-place concr ete except that precast concrete base sections may be used for precast conc rete manhole risers.

Concrete block is not allowed in areas subject to a ircraft loading.

2.14.2 Precast Concrete Structures, Risers and To ps

Precast concrete underground structures may be prov ided in lieu of cast-in-place subject to the requirements specified below. Precast units must be the product of a manufacturer regularly eng aged in the manufacture of precast concrete products, including precast man holes.

2.14.2.1 General

Precast concrete structures must have the same accessories and facilities as required for cast-in-place structures. Likewise , precast structures must have plan area and clear heights not less than those of cast-in-place structures. Concrete materials and methods of cons truction must be the same as for cast-in-place concrete construction, as modified herein. Slope in floor may be omitted provided precast sections a re poured in reinforced steel forms. Concrete for precast work must have a 28-day compressive strength of not less than 4000 psi . Structures may be precast to the design and details indicated for cast-in-place cons truction, precast monolithically and placed as a unit, or structures may be assembled sections, designed and produced by the manufacturer in accordance with the requirements specified. Structures must be identif ied with the manufacturer's name embedded in or otherwise perman ently attached to an interior wall face.

2.14.2.2 Design for Precast Structures

ACI 318M . In the absence of detailed on-site soil informat ion, design for the following soil parameters/site conditions:

a. Angle of Internal Friction (phi) = 30 degrees

b. Unit Weight of Soil (Dry) = 110 pcf , (Saturated) = 130 pcf

c. Coefficient of Lateral Earth Pressure (Ka) = 0. 33

d. Ground Water Level = 3 feet below ground elevation

e. Vertical design loads must include full dead, s uperimposed dead, and live loads including a 30 percent magnification fac tor for impact.

Live loads must consider all types and magnitudes o f vehicular (automotive, industrial, or aircraft) traffic to be encountered. The minimum design vertical load must be for H20 highwa y loading per

AASHTO HB-17.

f. Horizontal design loads must include full geost atic and hydrostatic pressures for the soil parameters, water table, and depth of installation to be encountered. Also, horizontal l oads imposed by adjacent structure foundations, and horizontal load components of vertical design loads, including impact, must be co nsidered, along with a pulling-in iron design load of 6000 pounds .

g. Each structural component must be designed for the load combination and positioning resulting in the maximum shear and mome nt for thatparticular component.

h. Design must also consider the live loads induce d in the handling, installation, and backfilling of the manholes. Pro vide lifting devices to ensure structural integrity during handling and installation.

2.14.2.3 Construction

Structure top, bottom, and wall must be of a unifor m thickness of not less than 6 inches . Thin-walled knock-out panels for designed or fut ure duct bank entrances are not permitted. Provide quantity , size, and location of duct bank entrance windows as directed, and cast co mpletely open by the precaster. Size of windows must exceed the nominal duct bank envelope dimensions by at least 12 inches vertically and horizontally to preclude in-field window modifications made necessary by duc t bank misalignment.

However, the sides of precast windows must be a min imum of 6 inches from the inside surface of adjacent walls, floors, or ce ilings. Form the perimeter of precast window openings to have a keye d or inward flared surface to provide a positive interlock with the ma ting duct bank envelope. Provide welded wire fabric reinforcing t hrough window openings for in-field cutting and flaring into duct bank env elopes. Provide additional reinforcing steel comprised of at least two No. 4 bars around window openings. Provide drain sumps a minimum of 12 inches in diameter and 4 inches deep for precast structures.

2.14.2.4 Joints

Provide tongue-and-groove joints on mating edges of precast components.

Shiplap joints are not allowed. Design joints to f irmly interlock adjoining components and to provide waterproof junc tions and adequate shear transfer. Seal joints watertight using preformed p lastic strip conforming to ASTM C990. Install sealing material in strict accordance with the sealant manufacturer's printed instructions. Provi de waterproofing at conduit/duct entrances into structures, and where a ccess frame meets the top slab, provide continuous grout seal.

2.14.3 Manhole Frames and Covers

Provide cast iron frames and covers for manholes co nforming to CID A-A-60005 .

Cast the words "ELECTRIC" or "TELECOMMUNICATIONS" i n the top face of power and telecommunications manhole covers, respectively .

2.14.4 Handhole Frames and Covers

Frames and covers of steel must be welded by qualif ied welders in accordance with standard commercial practice. Stee l covers must be rolled-steel floor plate having an approved antisli p surface. Hinges must be of stainless steel with bronze hinge pin, 5 by 5 inches by approximately 3/16 inch thick, without screw holes, and must be for full s urface application by fillet welding. Hinges must have no nremovable pins and five knuckles. The surfaces of plates under hinges must be true after the removal of raised antislip surface, by grinding or other approved method.

2.14.5 Frames and Covers for Airfield Facilities

Fabricate frames and covers for airfield use of sta ndard commercial grade steel welded by qualified welders in accordance wit h AWS D1.1/D1.1M .

Covers must be of rolled steel floor plate having a n approved anti-slip surface. Steel frames and covers must be hot dippe d galvanized after fabrication.

2.14.6 Ductile Iron Frames and Covers for Airfield Facilit ies

At the contractor's option, ductile iron covers and frames designed for a minimum proof load of 100,000 pounds may be provided in lieu of the steel frames and covers indicated. Covers must be of the same material as the frames (i.e. ductile iron frame with ductile iron c over, galvanized steel frame with galvanized steel cover). Perform proof loading in accordance with CID A-A-60005 and ASTM A48/A48M. Proof loads must be physically stamped into the cover. Provide the Contracting Of ficer copies of previous proof load test results performed on the same frame s and covers as proposed for this contract. Modify the top of the structure to accept the ductile iron structure in lieu of the steel structure indic ated. The finished structure must be level and non-rocking, with the t op flush with the surrounding pavement.

2.14.7 Composite/Fiberglass Handholes and Covers

ANSI/SCTE 77 . Provide handholes and covers of polymer concrete , reinforced with heavy weave fiberglass with a design load (Tie r rating) appropriate for or greater than the intended use. All covers a re required to have the Tier level rating embossed on the surface and this rating must not exceed the design load of the box.

2.15 CABLE SUPPORTS (RACKS, ARMS, AND INSULATORS)

The metal portion of racks and arms must be zinc-co ated after fabrication.

2.15.1 Cable Rack Stanchions

The wall bracket or stanchion must be 4 inches by approximately 1-1/2 inch by 3/16 inch channel steel, or 4 inches by approximately 1 inch glass-reinforced nylon with recessed bolt mounting holes, 48 inches long (minimum) in manholes. Slots for mounting cable ra ck arms must be spaced at 8 inch intervals.

2.15.2 Rack Arms

Cable rack arms must be steel or malleable iron or glass reinforced nylon and must be of the removable type. Rack arm length must be a minimum of 8 inches and a maximum of 12 inches .

2.15.3 Insulators

Insulators for metal rack arms must be dry-process glazed porcelain.

Insulators are not required for nylon arms.

2.16 CABLE TAGS IN MANHOLES

Provide tags for each power cable located in manhol es. The tags must be polyethylene. Do not provide handwritten letters. The first position on the power cable tag must denote the voltage. The s econd through sixth positions on the tag must identify the circuit. Th e next to last position must denote the phase of the circuit and include th e Greek "phi" symbol.

The last position must denote the cable size. As a n example, a tag could have the following designation: "11.5 NAS 1-8(Phas e A)500," denoting that the tagged cable is on the 11.5kV system circuit nu mber NAS 1-8, underground, Phase A, sized at 500 kcmil.

2.16.1 Polyethylene Cable Tags

Provide tags of polyethylene that have an average t ensile strength of 3250 pounds per square inch ; and that are 0.08 inch thick (minimum), non-corrosive non-conductive; resistive to acids, a lkalis, organic solvents, and salt water; and distortion resistant to 170 degrees F .

Provide 0.05 inch (minimum) thick black polyethylene tag holder. Pr ovide a one-piece nylon, self-locking tie at each end of th e cable tag. Ties must have a minimum loop tensile strength of 175 pounds . The cable tags must have black block letters, numbers, and symbols one inch high on a yellow background. Letters, numbers, and symbols must not fall off or change positions regardless of the cable tags' orientation .

2.17 MEDIUM VOLTAGE ABOVE GROUND CABLE TERMINATIN G CABINETS

Cable terminating cabinets must be hook-stick opera ble, deadfront construction conforming to the requirements of IEEE C37.20.3 , Category A.

Provide cabinets with 200 A. loadbreak junctions an d elbow-type separable loadbreak connectors, cable parking stands, and gro unding lugs. Provide cable terminating equipment in conformance with IEEE 386 .

Ratings at 60 Hz must be:

Nominal voltage (kV) 12.47

Rated maximum voltage (kV) 15

Rated continuous current (A) 200

One-second short-time current-carrying capacity (kA ) 16

BIL (kV) 95

2.18 LOW VOLTAGE ABOVE GROUND TERMINATION PEDESTAL

Provide copolymer polypropylene, low voltage above ground termination pedestal manufactured through an injection molding process. Pedestals must resist fertilizers, salt air environments and ultra -violet radiation.

Pedestal top must be imprinted with a "WARNING" and "ELECTRIC" identification. Pedestal must contain four lay-in six port connectors.

Connectors must be NEMA C119.4 , Class "A", dual rated for aluminum or copper, and capable of terminating conductors rangi ng from 10 AWG to 500 kcmil. Protect each connector with a clear, hard l exan (plastic) cover.

Pedestal must be provided with rust-free material a nd stainless steel hardware. Pedestal must be lockable.

2.19 SOURCE QUALITY CONTROL

2.19.1 Arc-Proofing Test for Cable Fireproofing Tape

Manufacturer must test one sample assembly consisti ng of a straight lead tube 12 inches long with a 2 1/2 inch outside diameter, and a 1/8 inch thick wall, and covered with one-half lap layer of arc and fireproofing tape per manufacturer's instructions. The arc and fireproofing tape must withstand extreme temperature of a high-current fau lt arc 13,000 degrees K for 70 cycles as determined by using an argon direc ted plasma jet capable of constantly producing and maintaining an arc temp erature of 13,000 degrees K. Temperature (13,000 degrees K) of the i gnited arc between the cathode and anode must be obtained from a dc power source of 305 (plus or minus 5) amperes and 20 (plus or minus 1) volts. T he arc must be directed toward the sample assembly accurately positioned 5 (plus or minus 1) millimeters downstream in the plasma from the anode orifice by fixed flow rate of argon gas (0.18 g per second). Each sample assembly must be tested at three unrelated points. Start time for tests mu st be taken from recorded peak current when the specimen is exposed to the full test temperature. Surface heat on the specimen prior to that time must be minimal. The end point is established when the pla sma or conductive arc penetrates the protective tape and strikes the lead tube. Submittals for arc-proofing tape must indicate that the test has b een performed and passed by the manufacturer.

2.19.2 Medium Voltage Cable Qualification and Production T ests

Results of AEIC CS8 qualification and production tests as applicable f or each type of medium voltage cable.

PART 3 EXECUTION

3.1 INSTALLATION

Install equipment and devices in accordance with th e manufacturer's published instructions and with the requirements an d recommendations of NFPA 70 and IEEE C2 as applicable. In addition to these requirements, install telecommunications in accordance with TIA-758 and RUS Bull 1751F-644 .

3.2 CABLE INSPECTION

Inspect each cable reel for correct storage positio ns, signs of physical damage, and broken end seals prior to installation. If end seal is broken, remove moisture from cable prior to installation in accordance with the cable manufacturer's recommendations.

3.3 CABLE INSTALLATION PLAN AND PROCEDURE

Obtain from the manufacturer an installation manual or set of instructions which addresses such aspects as cable construction, insulation type, cable diameter, bending radius, cable temperature limits for installation, lubricants, coefficient of friction, conduit cleani ng, storage procedures, moisture seals, testing for and purging moisture, m aximum allowable pulling tension, and maximum allowable sidewall bearing pre ssure. Prepare a checklist of significant requirements . Perform pulling calculations and prepare a pulling plan and submit along with the ma nufacturer's instructions in accordance with SUBMITTALS. Instal l cable strictly in accordance with the cable manufacturer's recommenda tions and the approved installation plan.

Calculations and pulling plan must include:

a. Site layout drawing with cable pulls identified in numeric order of expected pulling sequence and direction of cable pu ll.

b. List of cable installation equipment.

c. Lubricant manufacturer's application instructio ns.

d. Procedure for resealing cable ends to prevent m oisture from entering cable.

e. Cable pulling tension calculations of all cable pulls.

f. Cable percentage conduit fill.

g. Cable sidewall bearing pressure.

h. Cable minimum bend radius and minimum diameter of pulling wheels used.

i. Cable jam ratio.

j. Maximum allowable pulling tension on each different type and size of conductor.

k. Maximum allowable pulling tension on pulling de vice.

3.4 UNDERGROUND FEEDERS SUPPLYING BUILDINGS

Terminate underground feeders supplying building at a point 5 feet outside the building and projections thereof, except that c onductors must be continuous to the terminating point indicated. Coo rdinate connections of the feeders to the service entrance equipment with Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Provide RGS conduit from the supply equipment to a point 5 feet outside the building and projections thereof.

Protect ends of underground conduit with plastic pl ugs until connections are made.

Encase the underground portion of the conduit in a concrete envelope and bury as specified for underground duct with concret e encasement.

3.5 UNDERGROUND STRUCTURE CONSTRUCTION

Provide standard type cast-in-place construction as specified herein and as indicated, or precast construction as specified her ein. Horizontal concrete surfaces of floors must have a smooth trow el finish. Cure concrete by applying two coats of white pigmented m embrane forming-curing compound in strict accordance with the manufacturer 's printed instructions, except that precast concrete may be steam cured. C uring compound must conform to ASTM C309. Locate duct entrances and windows in the center of end walls (shorter) and near the corners of sidewal ls (longer) to facilitate cable racking and splicing. Covers for underground structures must fit the frames without undue play. Steel and iron must be formed to shape and size with sharp lines and angles. Castin gs must be free from warp and blow holes that may impair strength or app earance. Exposed metal must have a smooth finish and sharp lines and arise s. Provide necessary lugs, rabbets, and brackets. Set pulling-in irons and other built-in items in place before depositing concrete. Manhole locat ions, as indicated, are approximate. Coordinate exact manhole locations wi th other utilities and finished grading and paving.

3.5.1 Cast-In-Place Concrete Structures

Construct walls on a footing of cast-in-place concr ete except that precast concrete base sections may be used for precast conc rete manhole risers.

Concrete block is not allowed in areas subject to a ircraft loading.

3.5.2 Precast Concrete Construction

Set commercial precast structures on 6 inches of level, 90 percent compacted granular fill, 3/4 inch to 1 inch size, extending 12 inches beyond the structure on each side. Compact granula r fill by a minimum of four passes with a plate type vibrator. Installati on must additionally conform to the manufacturer's instructions.

3.5.3 Pulling-In Irons

Provide steel bars bent as indicated, and cast in t he walls and floors.

Alternatively, pipe sleeves may be precast into the walls and floors where required to accept U-bolts or other types of pullin g-in devices possessing the strengths and clearances stated herein. The fi nal installation of pulling-in devices must be made permanent. Cover a nd seal exterior projections of thru-wall type pulling-in devices wi th an appropriate protective coating. In the floor the irons must be a minimum of 6 inches from the edge of the sump, and in the walls the iro ns must be located within 6 inches of the projected center of the duct bank pattern o r precast window in the opposite wall. However, the pulling- in iron must not be located within 6 inches of an adjacent interior surface, or duct or precas t window located within the same wall as the iron. I f a pulling-in iron cannot be located directly opposite the correspondi ng duct bank or precast window due to this clearance limitation, locate the iron directly above or below the projected center of the duct bank pattern or precast window the minimum distance required to preserve the 6 inch clearance previously stated. In the case of directly opposing precast w indows, pulling-in irons consisting of a 3 foot length of No. 5 reinforcing bar, formed into a hairpin, may be cast-in-place within the precast wi ndows simultaneously with the end of the corresponding duct bank envelop e. Irons installed in this manner must be positioned directly in line wit h, or when not possible, directly above or below the projected center of the duct bank pattern entering the opposite wall, while maintaining a min imum clear distance of 3 inches from any edge of the cast-in-place duct bank envel ope or any individual duct. Pulling-in irons must have a clea r projection into the structure of approximately 4 inches and must be designed to withstand a minimum pulling-in load of 6000 pounds .