26 0513 USER-Medium-Voltage Cables - Rev1.pdf

Vermont Air National Guard Electrical Distribution Project LN Consulting, Inc.

South Burlilngton, Vermont Project No. 19045

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MEDIUM-VOLTAGE CABLES -

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SECTION 26 0513

MEDIUM-VOLTAGE CABLES - REV1

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Medium voltage cable.

B. Cable accessories.

1.02 RELATED REQUIREMENTS

A. Section 26 0553 - Identification for Electrical Systems.

1.03 REFERENCE STANDARDS

A. IEEE C2 - National Electrical Safety Code; 2017.

B. IEEE 48 - IEEE 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; 2009.

C. NETA ATS - Acceptance Testing Specifications for Electrical Power Equipment and Systems;

2017.

D. NFPA 70 - National Electrical Code; Most Recent Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and Supplements.

1.04 SUBMITTALS

A. Product Data: Provide for cable.

B. Manufacturer's Instructions: Indicate application conditions and limitations of use stipulated by product testing agency specified under Regulatory Requirements. Include instructions for storage, handling, protection, examination, preparation, and installation of product.

C. Project Record Documents: Record actual sizes and locations of cables.

D. Certificate of Compliance: Indicate approval of installation by authority having jurisdiction.

E. Maintenance Data: Include instructions for testing and cleaning cable and accessories.

1.05 QUALITY ASSURANCE

A. Comply with NFPA 70.

B. Manufacturer Qualifications: Company specializing in manufacturing the products specified in this section with minimum three years documented experience and with service facilities within 100 miles (160 km) of Project.

C. Installer Qualifications: Authorized installer of specified manufacturer with service facilities within 100 miles (160 km) of Project.

D. Products: Listed, classified, and labeled as suitable for the purpose intended.

E. Product Listing Organization Qualifications: An organization recognized by OSHA as a

Nationally Recognized Testing Laboratory (NRTL) and acceptable to authorities having jurisdiction.

PART 2 PRODUCTS

2.01 MEDIUM-VOLTAGE CABLE

A. Manufacturers:

1. Okonite: www.okonite.com/#sle.

2. Hendrix.

3. Other cables acceptable to Green Mountain Power.

B. Medium Voltage Cable: NEMA WC 70 cross-linked polyethylene insulated cable.

1. Voltage: 15 kV, grounded.

2. Conductor: Aluminum, concentric, stranded, with wire-woven conductor shield.

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3. Construction: Single conductor with metal wire insulation shielding.

4. Easy stripping insulator and cover.

5. Insulation Jacket: PVC, 175 mils (____ mm) minimum thickness. TRXLPE (tree-retardant cross-linked polyethylene) insulation.

6. Product: Hendrix 3 conductor URD cable, 100% insulation with full neutral for three phase installations. Hendrix 1 conductor URD cable, 100% insulation with full neutral for single phase installations.

7. Intent is to match Green Mountain Power (GMP) standards.

2.02 CABLE ACCESSORIES

A. Manufacturers:

1. 3M: www.3m.com/#sle.

2. TE Connectivity; Raychem Products: www.te.com/#sle.

3. Substitutions: To be approvied by GMP.

B. Separable Elbow Connectors: IEEE 48, 15KV, 200A, loadbreak connector with test point designed in accordance with IEEE 386. Provide required cable connectors, shield adapters, lubricants, jacket seal per Green Mountain Power Standards and cable type.

C. Surge Arrestors:

1. MOVE Elbow: IEEE 386 metal oxide varistor, premolded rubber, fully shielded, submersible, deadfront, EPDM housing.

2. Distribution Class Arresters: IEEE C62.11, metal oxide varistor, polymer-silicone housing, 10kA, wildlife protector

3. 9 kV duty cycle voltage rating. 8.4 MCOV.

4. Match GMP standards.

D. Modular Cable Terminations: IEEE 48, Class 1, molded-rubber cable termination in kit form with stress cone, ground clamp, non-tracking rubber skirts, load break connector, rubber cap, and aerial lug.

1. Product: 3M QT-II OR QT-III Cold Shrink Outdoor Skirted Termination Kit.

2. Substitutions: As equal approved by GMP.

E. Splices:

1. Cold shrink Inline splice kits below are designed for joining Jacketed Concentric Neutral

(JCN) and Flat Strap Neutral power cables. The splice includes an integrated 7 AWG ground braid for attaching to an external ground wire.

a. 3M Cold Shrink QS4 concentric jacket with shearbolt connector

b. Substitutions: As equal approved by GMP.

PART 3 EXECUTION

3.01 EXAMINATION

A. Coordinate all work with electric utility and Owner.

B. Verify that conduit or duct are ready to receive cable.

C. Verify that field measurements are as indicated.

D. Verify routing and termination locations of cable bank prior to rough-in.

E. Cable routing is shown in approximate locations unless dimensioned. Route as required to complete wiring system.

3.02 PREPARATION

A. Use swab to clean conduits before pulling cables.

3.03 INSTALLATION

A. Design intent is to reuse existing cable racks in manholes.

B. Avoid abrasion and other damage to cables during installation.

C. Use suitable lubricants and pulling equipment.

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D. Sustain cable pulling tensions and bending radii below recommended limits.

E. Ground cable shield at each termination and splice.

F. Install cables in manholes along wall providing longest route.

G. Arrange cable in manholes to avoid interference with duct entrances.

3.04 FIELD QUALITY CONTROL

A. Inspect exposed cable sections for physical damage.

B. Inspect cable for proper connections as indicated.

C. Inspect shield grounding, cable supports, and terminations for proper installation.

D. Perform inspections and tests listed in NETA ATS, Section 7.3.3. The cable time domain reflectometer (TDR) measurements on each conductor listed as optional are not required.

3.05 PROTECTION

A. Protect installed cables from entrance of moisture.

END OF SECTION