Sec_26_0513_MEDIUM-VOLTAGE_CABLES.pdf

OANG 180th Fighter Wing - Swanton, Ohio URS

WYTD 079032 - Construct ACA Alert Crew Quarters Facility URS Project No. 14578137

1 December 2015 Type B Services - B3 Submission

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SECTION 26 0513

MEDIUM-VOLTAGE CABLES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

Supplementary Conditions and all divisions of specification sections, apply to this Section.

1.2 DESCRIPTION OF WORK

A. General: The Contractor shall provide the labor, tools, equipment, and materials necessary to furnish and install medium-voltage cables in accordance with the Plans and as specified herein.

B. This Section includes cables and related splices, terminations, and accessories for 15,000-volt electrical distribution systems.

1.3 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced and certified cable splicer to install, splice, and terminate medium-voltage cable.

B. Manufacturer Qualifications: Firm experienced in manufacturing medium-voltage cable and accessories similar to those indicated for this Project, with a record of successful in-service performance.

C. Testing Firm Qualifications: In addition to the requirements specified in Division 01 Section

"Quality Control Services," an independent testing firm shall meet OSHA criteria for accreditation of testing laboratories, Title 29, Part 1907, or shall be a full member company of the International Electrical Testing Association (NETA).

1. Testing Firm's Field Supervisor Qualifications: A person currently certified by the

NETA or National Institute for Certification in Engineering Technologies to supervise on-site testing specified in Part 3.

D. Comply with NFPA 70, National Electrical Code, for components and installation.

E. Comply with IEEE C2, National Electrical Safety Code, for components and installation.

F. Listing and Labeling: Provide products specified in this Section that are listed and labeled.

1. The terms "Listed” and “Labeled": As defined in the National Electric Code, Article 100.

2. Listing and Labeling Agency Qualifications: A Nationally Recognized Testing

Laboratory (NRTL) as defined in OSHA Regulation 1910.7.

3. Single-Source Responsibility: All medium-voltage cable shall be the product of a single manufacturer.

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1.4 SUBMITTALS

A. General: Submit the following according to the Conditions of the Contract and Division 01 specification sections.

1. Product data for cables and cable accessories, including splices and terminations.

2. Product certificate, signed by manufacturer, stating that its products comply with the specified requirements.

3. Qualification data for firms and persons specified in paragraph 1.3 above to demonstrate their capabilities and experience. Include list of completed projects with project names, addresses, names of Architects and Owners, and other information specified.

4. Sample of each test report form prior to testing. Provide written description of proposed test procedures.

5. Product Test Reports: Certified reports of manufacturer's design and production tests indicating compliance of cable and accessories with referenced standards.

6. Field test reports indicating and interpreting test results relative to compliance with performance requirements specified. Include certified copies of field test records.

7. Samples: 16-inch lengths of each type of cable specified.

8. Maintenance data for cables and accessories to include in the Operating and Maintenance

Manual specified in Division 01.

a. Include periodic tests of cables in service.

b. Include operation of fault indicators and separable insulated connectors and their accessories.

1.5 JOB CONDITIONS

A. Cable reels shall be stored in heated facilities for a minimum of 24 hours prior to installation.

1.6 DELIVERY, HANDLING, AND STORAGE

A. Deliver medium-voltage cable on factory reels conforming to NEMA WC26.

B. Store cables on reels on elevated platforms in a dry location.

PART 2 - PRODUCTS

2.1 CABLES

A. Type: MV105.

B. Conductor: Copper.

C. Conductor Stranding: Compact, Class B.

D. Insulation: Lead-free ethylene-propylene rubber (EPR) conforming to NEMA WC8 (ICEA S-

68-516) and AEIC ES6.

1. Voltage Rating: 15 kV.

2. Insulation Thickness: 133% insulation level.

E. Shielding: Helically-wrapped copper tape with 25% overlap, applied over semiconducting insulation shield.

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F. Jacket: Cross-linked polyethylene.

2.2 SPLICE KITS

A. Connectors: IEEE 404, compression-type, as recommended for the application by cable or splicing kit manufacturer.

B. Splicing Products: As recommended in writing by the splicing kit manufacturer for the specific sizes, ratings, and configurations of cable conductors and splices specified. Include all components required for complete splice, with detailed instructions.

1. Taped splice kit.

2. Combination tape and cold-shrink rubber sleeve kit with rejacketing by cast-epoxy-resin encasement or other waterproof, abrasion-resistant material.

3. Heat-shrink splicing kit of uniform cross-section polymeric construction with outer heat-shrink jacket.

4. Premolded, cold-shrink rubber, in-line splicing kit.

5. Premolded ethylene propylene diene monomer (EPDM) splicing body kit with cable joint sealed by interference fit of mating parts and cable.

6. The splice shall be capable of being immersed under water.

7. The splice shall meet or exceed the insulation rating of the cable.

2.3 SOLID TERMINATIONS

A. Conductor Terminations: Comply with IEEE Standard 48, as indicated. Insulation class equivalent to that of the cable. Terminations for shielded cables include a shield grounding strap.

1. Class 1 Termination for Shielded Cable: Heat-shrinkable-type with heat-shrinkable inner stress control and outer non-tracking tubes, multiple molded non-tracking skirt modules, and compression-type connector.

2. The termination shall meet or exceed the insulation rating of the cable.

2.4 SEPARABLE INSULATED CONNECTORS

A. Modular system complying with IEEE 386. Disconnecting, single-pole, cable terminators and matching stationary, plug-in, dead-front terminals designed for cable voltage and for sealing against moisture.

1. Terminations At Distribution Points: Modular type, consisting of terminators installed on cables and modular, dead-front, terminal junctions for interconnecting cables.

2. Load-Break Cable Terminators: Elbow-type units with 200-ampere load make/break and continuous current rating. Coordinate with insulation diameter and conductor size and material of cable being terminated. Include capacitively coupled test point on terminator body.

3. Dead-Break Cable Terminators: Elbow-type unit with 600-ampere continuous current rating, designed for de-energized disconnecting and connecting. Coordinated with insulation diameter and conductor size and material of cable being terminated. Include capacitively coupled test point on terminator body.

4. Dead-Front Terminal Junctions: Modular bracket-mounted groups of dead-front stationary terminals that mate and match with above cable terminators. Two-, three-, or four-terminal units as indicated, with fully rated, insulated, watertight conductor connection between terminals. Grounding lug and manufacturer's standard accessory stands and stainless-steel mounting brackets and attaching hardware.

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5. Protective Cap: Insulating, electrostatic-shielding, water-sealing cap with drain wire.

6. Portable Feed-Through Accessory: Two-terminal dead-front junction arranged for removable mounting on accessory stand of stationary terminal junction.

7. Grounding Kit: Jumpered elbows, portable feed-through accessory units, protective caps, test rods suitable for concurrently grounding 3 phases of feeders, and carrying case.

8. Stand-Off Insulator: Portable, single dead-front terminal for removable mounting on accessory stand of stationary terminal junction. Insulators suitable for fully insulated isolation of energized cable elbow terminator.

9. Test Point Fault Indicators: Arranged for installation in test points of load-break separable connectors. Self-resetting indicators capable of being installed with a shotgun hot stick and tested with a test tool. Current trip ratings as indicated.

10. Tool Set: Shotgun-type hot stick with energized terminal indicator, fault indicator test tool, and carrying case.

2.5 ARC-PROOFING MATERIALS

A. Tape for First Course on Metal Objects: 10-mil-thick, corrosion-protective, moisture-resistant

PVC pipe-wrapping tape.

B. Arc-Proofing Tape: NRTL-listed fireproofing tape, flexible, conformable, intumescent to 0.3 inch thick, and compatible with the cable jacket on which used.

C. Glass Cloth Tape: Pressure-sensitive adhesive type, 1/2 inch wide.

2.6 FAULT INDICATORS

A. Indicators: Manual reset, fault indicator, arranged to clamp to cable sheath and provide a display after the cable has faulted. Instrument immune to heat, moisture, and corrosive conditions and recommended by the manufacturer for the installation conditions. Indicators have current trip ratings and quantities as indicated.

B. Resetting Tool: Designed for use with fault indicators, with moisture-resistant storage/carrying case.

2.7 SOURCE QUALITY CONTROL

A. Test and inspect cables according to NEMA WC 7 and NEMA WC 8 before shipping.

2.8 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Cables

a. American Insulated Wire Corp., Leviton Manufacturing Co.

b. Brand-Rex Cable Systems, Brintec Corp.

c. Cablec Corp.

d. Carol Cable Co., Inc.

e. Hubbell Inc., The Kerite Co.

f. The Okonite Co.

g. Power Cable Division, Pirelli Cable Corp.

h. Southwire Co.

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2. Cable Splicing and Terminating Products and Accessories:

a. Southwire.

b. Elastimold.

c. G&W Electric Co.

d. Mac Products, Inc.

e. MP Husky Corp.

f. Energy Division, Raychem Corp.

g. Adalet-PLM, Scott Fetzer Co.

h. Thomas and Betts.

i. 3M.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine raceways to receive medium-voltage cables for compliance with installation tolerances and other conditions affecting performance of the cable. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Install medium-voltage cable as indicated, according to manufacturer's written instructions and

IEEE 576.

B. Pull conductors simultaneously where more than one cable is indicated in same raceway. Use

NRTL-listed and manufacturer-approved pulling compound or lubricant where necessary. Do not exceed manufacturer's recommended maximum pulling tensions and sidewall pressure values.

C. Use pulling means, including fish tape, cable, rope, and basketweave wire/cable grips, that will not damage cables or raceways. Do not use rope hitches for pulling attachment to cable.

D. Do not install cable in temperatures below 14 deg F.

E. No splices shall be permitted in any power cable, except where specifically noted. All cables must be continuous from termination to termination.

F. All splices and terminations of high-voltage cable shall be made with kits specifically designed for the purpose and in strict accordance with kit manufacturer's recommendations. Metallic shield shall be grounded at all splices and terminations, unless otherwise noted.

G. All splices and terminations shall be made by qualified personnel.

H. Provide identification of medium voltage cables as specified in Division 26 Section "Electrical

Identification."

I. In manholes, handholes, pull boxes, junction boxes, and cable vaults, train cables around walls by the longest route from entry to exit and support cables at intervals adequate to prevent sag.

J. Install splices at pull points and elsewhere as indicated using standard kit. Conform to kit manufacturer's written instructions.

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K. Install terminations at ends of conductors and seal multiconductor cable ends with standard kits.

Conform to manufacturer's written instructions. Comply with classes of terminations indicated.

L. Install separable insulated connector components where indicated in accordance with manufacturer's written instructions.

M. Quantities: Provide the following quantities of components:

1. Protective Cap: Install at each terminal junction, 1 on each terminal to which no feeder is indicated to be connected.

2. Portable Feed-Through Accessory: 3

3. Stand-Off Insulator: 3

N. Arc-Proofing: Arc-proof medium-voltage cable at locations not protected by conduit, cable tray, direct burial, or termination materials except where indicated. Apply as follows and as recommended by the manufacturer of the arc-proofing tape.

1. Clean cable sheath.

2. Wrap metallic cable components with 10-mil pipe wrapping tape.

3. Smooth surface contours with electrical insulation putty.

4. Apply arc-proofing tape in one half-lapped layer with the coated side toward the cable.

5. Band the arc-proofing tape with 1-inch-wide bands of half-lapped adhesive glass-cloth tape 2 inches on center.

O. Fault Indicators: Install fault indicators on each phase where indicated.

3.3 GROUNDING

A. Ground shields, metal bodies, and hardware according to manufacturer's written instructions.

Cable ampacities shown on Drawings are based on shields grounded at one point. Contractor shall comply with NEC 310.60 for shields grounded at more than one point.

3.4 FIELD QUALITY CONTROL

A. Contractor shall furnish materials, labor, and equipment required for the acceptance tests specified herein. Tests shall be performed in the presence of the Owner’s Representative and must be passed before final acceptance of the work.

B. Testing: Upon installation of medium-voltage cable and before electrical circuitry has been energized, demonstrate product capability and compliance with requirements.

1. Procedures: Perform each visual and mechanical inspection and electrical test stated in

NETA Standard ATS, Section 7.3.2. Certify compliance with test parameters.

2. All shielded medium-voltage cables shall be high direct voltage-tested before being placed into service. Cables exposed to inclement weather, such as excessive moisture or high temperatures, shall not be tested. Testing should occur not less than 48 hours after rainfall.

3. The Owner and A/E shall be notified at least 5 working days before testing.

4. Perform the following procedures before high direct voltage testing occurs:

a. Cover all cable ends or terminations with non-conducting plastic bags or other material which will prevent corona discharge. Keep cable ends dry.

b. Disconnect all equipment, including surge arresters, from cable circuit.

c. Maintain adequate distance between cable ends and grounded objects or equipment.

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d. Ground all circuit conductors not under test, cable shields, and nearby equipment.

e. Clean insulation surfaces.

5. The cables shall be tested to a final voltage of 28kV dc for 5kV rated cables and 65kV dc for 15kV rated cables. The voltage should be applied in a minimum of 5 steps, starting at a voltage of 9kV dc for 5kV rated cables and 27kV dc for 15kV rated cables. Each step voltage shall be held for one minute or until leakage current has reached a steady value, whichever is greater. The leakage current and test voltage values shall be recorded before applying the next step voltage. Leakage values shall be recorded to the nearest 0.1 microamperes. Once maximum test voltage has been reached, the test voltage shall be maintained for 15 minutes. Leakage current values shall be recorded at 2 minutes, 5 minutes, 10 minutes, and 15 minutes. All records shall be signed by the tester.

6. Test data records shall include the time and date of testing, date of installation, location, ambient temperature, weather conditions, cable description and manufacturer, phase and circuit identification, the name of the test operator, and the test equipment used.

7. The test data shall be sent to the A/E for review and acceptance. If any cable fails the test, as determined by the A/E, it shall be replaced and retested. The cable will not be allowed to be placed into service until it is accepted by the A/E.

8. All new medium-voltage cable shall be tested using a 2,500 volt DC megger before installation while on reel, and after installation but before energization. Record results as part of acceptance test.

3.5 PROTECTION

A. Provide final protection and maintain conditions, in a manner acceptable to Manufacturer and

Installer, to prevent entrance of moisture into the cable and ensure that medium-voltage cable is without damage or deterioration at Substantial Completion.

END OF SECTION 26 0513

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