26 05 13.00 26 R0002.pdf

CJD Excitation Units 1 – 16 Replacement 21050 Bridgeport, WA W912DW24R0001

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 05 13.00 26

MEDIUM-VOLTAGE CABLE

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

1.2 REFERENCES

1.3 SUBMITTALS

1.4 DELIVERY, STORAGE, AND HANDLING

1.4.1 General

1.5 INSPECTION AND TESTS

1.5.1 General

1.5.2 Flame Tests

1.5.3 Independent Tests

PART 2 PRODUCTS

2.1 MEDIUM-VOLTAGE CABLE

2.1.1 General

2.1.2 Wire and Cable Schedule

2.1.3 Governing Standards

2.2 MATERIALS

2.2.1 Submittal Requirements

2.2.2 Rated Circuit Voltages

2.2.3 Conductors

2.2.3.1 Material for Conductors

2.2.3.2 Size

2.2.3.3 Stranding

2.2.4 Insulation

2.2.4.1 Insulation Voltage Rating and Insulation Level

2.2.4.2 Insulation Material

2.2.4.3 Insulation Thickness

2.2.4.4 Insulation Shielding

2.2.5 Jackets

2.2.5.1 Jacket Material

2.2.5.2 Jacket Thickness

2.2.6 Cabling

2.2.7 Dimensional Tolerance

2.3 SPECIAL WIRE AND CABLE

2.3.1 Ground Conductors

2.3.2 Jumper Cables

2.3.3 Flexible and Portable Cable

2.4 MEDIUM-VOLTAGE CABLE TERMINATIONS

2.4.1 General

2.4.2 Cold-Shrink Type

2.4.3 Heat-Shrinkable Type

2.4.4 Load Break and Nonload Break Types

PART 3 EXECUTION

3.1 INSTALLATION INSTRUCTIONS

SECTION 26 05 13.00 26 Page 1

R0002

3.1.1 General

3.1.2 External Cabling

3.1.3 Phasing

3.1.4 Cable Pulling Requirements

3.1.4.1 Cable Pulling Calculations

3.1.5 Installation in Conduit

3.1.6 Installation in Cable Trays

3.1.7 Bends

3.1.8 Cable Cleats

3.1.9 Splices

3.1.10 Terminations

3.1.11 Cable Identification

3.1.11.1 Marking

3.1.12 Ground Conductors

3.2 FIELD ACCEPTANCE TESTING

3.2.1 Testing

3.2.2 Acceptance

-- End of Section Table of Contents --

SECTION 26 05 13.00 26 Page 2

SECTION 26 05 13.00 26

MEDIUM-VOLTAGE CABLE

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

Furnish and install medium-voltage cable as specified and indicated in contract drawings. Medium voltage cable will be used to supply 13,800 Vac nominal power to the primary of the contractor supplied power potential transformers (PPTs).

1.2 REFERENCES

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

ASTM INTERNATIONAL (ASTM)

ASTM B3 (2018) Standard Specification for Soft or Annealed Copper Wire

ASTM B33 (2020) Standard Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes

ASTM B172 (2017) Standard Specification for Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors

ASTM B174 (2017) Standard Specification for Bunch-Stranded Copper Conductors for Electrical Conductors

CODE OF FEDERAL REGULATIONS (CFR)

30 CFR 7.407 (2020) Test for Flame Resistance of Electric Cables and Cable Splices

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 48 (2020) 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 386 (2016) Separable Insulated Connector Systems for Power Distribution Systems Above 600 V

IEEE 400 (2012) Guide for Field Testing and

SECTION 26 05 13.00 26 Page 3

Evaluation of the Insulation of Shielded Power Cable Systems Rated 5 kV and Above

IEEE 1202 (2006) Flame-Propagation Testing of Wire and Cable

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA WC 58/ICEA S-75-381 (2017) Portable and Power Feeder Cables for Use in Mines and Similar Applications

NEMA WC 71/ICEA S-96-659 (2018) Nonshielded Cables Rated 2001-5000 V for Use in the Distribution of Electric Energy

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

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2021) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 1685 (2020) Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables

1.3 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 identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-03 Product Data

Submit within 60 days after Notice To Proceed:

Medium-Voltage Cable; G HDC

Medium-Voltage Cable Terminations

Ground Conductors

Cable Cleats; G HDC

Cable Identification

Cable Pulling Calculations; G HDC

SECTION 26 05 13.00 26 Page 4

Splices; G HDC

Flexible and Portable Cable

SD-05 Design Data

Cable Pulling Calculations; G, HDC

Submit within 90 calendar days of Notice to Proceed.

SD-06 Test Reports

Submit three certified copies within 10 days after completion of tests:

Factory Inspection and Tests; G HDC

Insulation Resistance Test

High Potential Test

Shield Resistance Test

1.4 DELIVERY, STORAGE, AND HANDLING

1.4.1 General

The cables shall be furnished one length to a reel or coil. Each length, and the outside of each reel or coil, shall be plainly marked or tagged to indicate the cable length, voltage rating, conductor size, and manufacturer's lot number and reel number. Cables for exclusively DC applications shall be identified as such. Reels shall remain the property of the Contractor. Cables on reels shall be stored in an area reserved for that purpose and protected from damage and weather. Reels shall be stored with the axis hole parallel to the horizontal plane. Cables on reels stored laying flat on the side of the reel will not be accepted.

Reels shall be rolled only in the direction indicated by the manufacturer. Cables shall be unreeled or uncoiled slowly to prevent damage to the sheath by sudden bending. Unreeling or uncoiling shall be stopped if kinks appear and shall not proceed until kinks have been removed. Kinked cable will be rejected. Improperly handled cable may be rejected.

1.5 INSPECTION AND TESTS

1.5.1 General

Factory Inspection and tests of wire and cable furnished under these specifications shall be made by and at the plant of the manufacturer.

Testing in general shall comply with Part 7 of NEMA WC 71/ICEA S-96-659 or Section 9 of NEMA WC 74/ICEA S-93-639 as applicable. Specific tests required for particular materials, components, and completed cables shall be as specified in the sections of the above standards applicable to those materials, components, and cable types. Tests shall also be performed in accordance with the additional requirements specified below. In addition to the manufacturer's routine sample testing, each reel provided must have passed an insulation resistance test. No wire or cable may be shipped until after the manufacturer's test reports have been submitted and approved.

SECTION 26 05 13.00 26 Page 5

1.5.2 Flame Tests

All multiple-conductor and single-conductor cable assemblies shall pass IEEE 1202 flame tests or UL 1685 flame tests. Single-conductor cables and individual conductors of multiple-conductor cables shall pass the flame test of Part 8.5 of NEMA WC 71/ICEA S-96-659 or Section 10.6 of NEMA WC 74/ICEA S-93-639 as applicable. If such tests, however, have previously been made on identical cables, these tests need not be repeated. Instead, certified reports of the original qualifying tests shall be submitted.

1.5.3 Independent Tests

The Government may at any time make visual inspections, continuity or resistance checks, insulation resistance readings, power factor tests, or DC high-potential tests at field test values. A cable's failure to pass these tests and inspections, or failure to produce readings consistent with acceptable values for the application, will be grounds for rejection of the cable.

PART 2 PRODUCTS

2.1 MEDIUM-VOLTAGE CABLE

2.1.1 General

All wire and cable shall be provided by the Contractor and shall conform to the requirements specified herein. Characteristics, including conductor size, stranding, number of conductors, rated circuit voltage, cabling, and other requirements for each type of service, shall be as indicated on the drawings, or as specified under the detailed requirements of these specifications for the particular construction or use, unless otherwise stated.

2.1.2 Wire and Cable Schedule

Wire and cable shall be furnished in accordance with the requirements of the Conduit and Cable Schedules, and as indicated on the drawings.

Estimated quantities listed in the Conduit and Cable Schedules are approximate for bidding purposes and shall be verified by the Contractor.

2.1.3 Governing Standards

Materials, construction and tests, unless otherwise specified, shall conform to the applicable requirements of NEMA WC 71/ICEA S-96-659 and NEMA WC 74/ICEA S-93-639 as applicable.

2.2 MATERIALS

2.2.1 Submittal Requirements

The Contractor shall submit catalog data to the Contracting Officer for review and/or approval as indicated in the submittal register. Data shall demonstrate compliance with the specifications requirements for all wire and cable types to be provided.

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2.2.2 Rated Circuit Voltages

All wire and cable shall have minimum rated circuit voltages in accordance with NEMA WC 71/ICEA S-96-659 and NEMA WC 74/ICEA S-93-639 as applicable.

2.2.3 Conductors

2.2.3.1 Material for Conductors

Conductors shall conform to all the applicable requirements of Part 2 of NEMA WC 71/ICEA S-96-659 or Section 2 of NEMA WC 74/ICEA S-93-639 as applicable and shall be annealed copper wire conforming to ASTM B3.

Copper conductors may be bare, or tin- or lead-alloy-coated, if required by the type of insulation used. Tin-coated copper conductors shall conform to ASTM B33. Conductors shall be stranded as required by subparagraph entitled Stranding.

2.2.3.2 Size

Minimum wire size shall be No. 6 AWG for 2.4kV cable and and No. 2 AWG for 5kV and 15kV cable.

2.2.3.3 Stranding

Conductor stranding classes cited herein shall be as defined in Appendix G of NEMA WC 71/ICEA S-96-659 and Appendix H of NEMA WC 74/ICEA S-93-639 as applicable. All conductors shall have class B stranding.

2.2.4 Insulation

2.2.4.1 Insulation Voltage Rating and Insulation Level

The rated voltage of the insulation shall be 5,000 volts for all circuits operating between 2,000 volts and 5,000 volts, with 133 percent insulation level, minimum 110 mils. The rated voltage of the insulation shall be 15,000 volts for all circuits operating above 5,000 volts, with 133 percent insulation level.

2.2.4.2 Insulation Material

Except as otherwise specified, insulation shall be cross-linked thermosetting polyethylene (XLPE) cross-linked thermosetting polyethylene ( XLPE) or cross-linked Polyethylene (XLP) type , or an ethylene-propylene rubber (EPR) type meeting the requirements of Section 4.1 of NEMA WC 71/ICEA S-96-659 for types X, or E, or Section 4.1 of NEMA WC 74/ICEA S-93-639 as applicable. Polyvinyl Chloride (PVC) insulation and thermoplastic type T insulation will not be accepted.

2.2.4.3 Insulation Thickness

The insulation thickness for each conductor shall be based on its rated voltage and insulation material for 133% insulation levels.

a. Single-Conductor Cables Rated Below 5kV - The insulation thickness for single-conductor cables rated below 5kV shall be as required by NEMA WC 71/ICEA S-96-659 Section 4 Tables for types X, or E.

b. Single-Conductor Cables Rated 5kV and Higher - The insulation thickness for single-conductor cables rated 5kV and higher shall be as

SECTION 26 05 13.00 26 Page 7 required NEMA WC 74/ICEA S-93-639 Section 4 Tables for XLPE and EPR.

c. Multiple-Conductor Cables Rated Below 5kV - The insulation thickness of the individual conductors of multiple-conductor (multiconductor) cables rated below 5kV shall be as required by NEMA WC 71/ICEA S-96-659 Section 4 Tables for types X, or E.

d. Multiple-Conductor Cables Cables Rated 5kV and Higher - The insulation thickness of the individual conductors of multiconductor cables cables rated 5kV and higher shall be as required by NEMA WC 74/ICEA S-93-639 Section 4 Tables for XLPE and EPR.

2.2.4.4 Insulation Shielding

Shielding shall be provided for all cables rated 5kV and higher.

Shielding for all cables rated 5kV and higher shall conform to the requirements of Sections 5 and 6 of NEMA WC 74/ICEA S-93-639 .

2.2.5 Jackets

All cables shall have jackets meeting the requirements of Section 7.1 of NEMA WC 74/ICEA S-93-639 as applicable, and as specified herein.

Individual conductors of multiple-conductor cables shall be required to have jackets only if they are necessary for the conductor to meet other specifications herein. Jackets of single-conductor cables and of individual conductors of multiple-conductor cables, except for shielded cables, shall be in direct contact and adhere or be vulcanized to the conductor insulation. Multiple-conductor cables and shielded single-conductor cables shall be provided with a common overall jacket, which shall be tightly and concentrically formed around the core.

Repaired jacket defects found and corrected during manufacturing are permitted if the cable, including jacket, afterward fully meets these specifications and the requirements of the applicable standards.

2.2.5.1 Jacket Material

The jacket shall be one of the materials listed below, in accordance with the applicable paragraphs of Part 5 of NEMA WC 71/ICEA S-96-659 and Section 7 of NEMA WC 74/ICEA S-93-639 . Polyvinyl chloride compounds will not be permitted. Variations from the materials required below will be permitted only if approved for each specific use, upon submittal of sufficient data to prove that they exceed all specified requirements for the particular application.

a. Heavy-duty black neoprene (CR-HD).

b. Heavy-duty chlorosulfonated polyethylene (CSPE-HD).

c. Heavy-duty cross-linked (thermoset) chlorinated polyethylene (CPE-XL-HD) Heavy-duty cross-linked (thermoset) chlorinated polyethylene (CPE-XL-HD) or Chlorinated Polyethylene (CPE).

2.2.5.2 Jacket Thickness

The minimum thickness of the jackets at any point shall be not less than 80 percent of the respective nominal thicknesses specified below:

a. Thickness of the jackets of the individual conductors of multiple-conductor cables shall be as required by the tables in Part 5

SECTION 26 05 13.00 26 Page 8 of NEMA WC 71/ICEA S-96-659 or the tables of Section 7 of NEMA WC 74/ICEA S-93-639 as applicable, and shall be in addition to the conductor insulation thickness for the insulation used. Thickness of the outer jackets or sheaths of the assembled multiple-conductor cables shall be as required by Part 5 of NEMA WC 71/ICEA S-96-659 or Section 7 of NEMA WC 74/ICEA S-93-639 as applicable.

b. Single conductor cables, if nonshielded, shall have a jacket thickness as required by the tables in Part 5 of NEMA WC 71/ICEA S-96-659 . If shielded, the jacket thickness shall be as required by the tables in Part 5 of NEMA WC 71/ICEA S-96-659 or the tables of Section 7 of NEMA WC 74/ICEA S-93-639 as applicable.

2.2.6 Cabling

Individual conductors of multiple-conductor cables shall be assembled with flame-and moisture-resistant fillers, binders, and a lay conforming to Part 6 of NEMA WC 71/ICEA S-96-659 or Section 8 of NEMA WC 74/ICEA S-93-639 as applicable, except that flat twin cables will not be permitted.

Fillers shall be used in the interstices of multiple-conductor round cables with a common covering where necessary to give the completed cable a substantially circular cross section. Fillers shall be non-hygroscopic material, compatible with the cable insulation, jacket, and other components of the cable. The rubber-filled or other approved type of binding tape shall consist of a material that is compatible with the other components of the cable and shall be lapped at least 10 percent of its width.

2.2.7 Dimensional Tolerance

The outside diameters of single-conductor cables and of multiple-conductor cables shall not vary more than 5 percent and 10 percent, respectively, from the manufacturer's published catalog data.

2.3 SPECIAL WIRE AND CABLE

2.3.1 Ground Conductors

Ground conductors shall be bare, soft-drawn, Class A or B stranded copper cables sized in accordance with NFPA 70 , NEMA WC 71/ICEA S-96-659 Part 6, or NEMA WC 74/ICEA S-93-639 Section 8 as applicable.

2.3.2 Jumper Cables

Unshielded jumper cables may be used only for internal direct connection of bus to surge protection devices within a circuit breaker enclosure or transformer enclosure. Cables listed as Jumper Cable with the appropriate voltage rating may be used. Cables listed as Welding Cable will not be accepted.

2.3.3 Flexible and Portable Cable

Cables indicated to be flexible or portable shall be Type SH or Type SHD rated for 5000 volts minimum, conforming to the requirements of NEMA WC 58/ICEA S-75-381 . Stranding shall be in accordance with ASTM B172 or ASTM B174. Individual conductors and cables shall pass the flame tests described in paragraph FLAME TESTS or the MSHA flame test of 30 CFR 7.407 .

Cables listed as Jumper Cable shall be permitted only for internal direct connection of bus to surge protection devices within a circuit breaker

SECTION 26 05 13.00 26 Page 9 enclosure or transformer enclosure. Cables listed as Welding Cable will not be accepted.

2.4 MEDIUM-VOLTAGE CABLE TERMINATIONS

2.4.1 General

Medium-voltage cable terminations shall meet IEEE 48 requirements for Class 2, rated 15kV. Terminations shall utilize stress cones tubular segments with long barrel, NEMA two-hole or four-hole compression-type terminals approved for connection to copper conductors. The shield and shield insulating jacket of shielded cables shall be maintained to a point as close to the terminals as possible. The shield insulating jacket shall not be stripped from the shield except where necessary to make the ground connection. All cable shields shall be grounded at one end only unless otherwise indicated. Grounding shall comply with Section 26 05 26.00 26, GROUNDING.

2.4.2 Cold-Shrink Type

Terminator shall be a one-piece design, utilizing the manufacturer's latest technology, where high-dielectric constant (capacitive) stress control is integrated within a skirted insulator made of silicone rubber or similar material resistant to atmospheric contamination, ultra violet rays, and oxidative decomposition. Termination shall not require heat or flame for installation. Termination kit shall contain all necessary materials, except lugs may be separate.

2.4.3 Heat-Shrinkable Type

Terminator shall consist of a uniform cross-section heat shrinkable polymeric construction stress relief tubing and environmentally sealed outer covering that is non-tracking, and is resistant to atmospheric contamination, ultra violet rays, and oxidative decomposition. Skirts or sheds shall be heat-shrinkable and of the same material. Termination kit shall contain all necessary materials, except lugs may be separate.

2.4.4 Load Break and Nonload Break Types

Load-break and nonload-break terminations shall meet IEEE 386 requirements.

PART 3 EXECUTION

3.1 INSTALLATION INSTRUCTIONS

3.1.1 General

For the purposes of this contract, the term "internal cabling" shall be used to designate the Contractor's factory installed cable furnished with the furnished equipment, and the term "external cabling" shall be used to designate field installed cable. Schedules of external cable are as shown in the drawings, showing information on cable numbers, sizes and estimated lengths, number of conductors, the function, and origins and terminations. Although estimated cable lengths are shown on the schedule for bidding purposes, the Contractor shall be responsible for determining the actual cable length required to make an installation of all new cables without splices. Different voltages shall not be run within the same multiconductor cable. The Contractor shall submit the manufacturer's

SECTION 26 05 13.00 26 Page 10 installation instructions.

3.1.2 External Cabling

All external cable shall conform to paragraph MEDIUM-VOLTAGE CABLE. All cable shall be installed in accordance with NFPA 70 requirements. All necessary materials, tools and equipment required for proper handling and installation of wire and cable in conduits, cable trays, and elsewhere shall be furnished by the Contractor. Each cable shall be connected to the associated equipment at both ends, and new cable shall be continuous and without splices between the equipment termination points. Cables left unterminated for future termination by others shall have both exposed ends enclosed by a heat-shrink insulating boot of the same voltage rating as the cable and of a material compatible with the cable jacket material.

Any cable damaged during installation shall be removed and replaced.

Installation of cable shall include installation of all supporting devices and all terminations required to complete the circuits as required.

3.1.3 Phasing

All terminal connections for power cables and conductors shall be made in such manner that the phasing will be as marked on the equipment, or indicated on the approved shop drawings. After cables have been terminated and the connection torqued, insulate all exposed parts to the cable's voltage rating.

3.1.4 Cable Pulling Requirements

Cable shall be pulled in a manner which will preclude damage to the conductor, insulation or jacket. Cable shall be pulled by the conductor and not by the insulation, jacket, or sheath only. Pulling tension shall not exceed the manufacturer's recommended maximum. Strain gages shall be used when pulling cable if any kind of mechanical pulling device is required for installation. Where the puller is also attached to the outer jacket of a cable pulling tension shall be limited to 100 lbs. Caution should be used to avoid exceeding the side wall rating of the cable. Any cable or conductor damaged during installation shall be removed and replaced with equivalent cable or conductor. Installation of cable shall include installation of all supporting devices and all terminations and identifications required to complete the circuits as shown on the drawings and as required.

3.1.4.1 Cable Pulling Calculations

Cable pulling calculations shall be performed by the cable manufacturer's Field Engineer or by another qualified engineer and approved by the cable manufacturer's Field Engineer. The calculations shall show that the cable manufacturer's maximum allowed pulling force and maximum allowed sidewall pressure will not be exceeded, and that cables may be installed without splices. If the calculations show that a splice is required at any point to avoid damage to the cable, this shall be immediately brought to the attention of the Government.

3.1.5 Installation in Conduit

Cable shall not be pulled into conduit runs until the conduit has been checked and determined to be clean and dry by pulling a clean, dry, tight fitting rag through each run. Only approved lubricants may be used to facilitate pulling of conductors.

SECTION 26 05 13.00 26 Page 11

3.1.6 Installation in Cable Trays

Cable pulling sheaves of adequate size shall be used where necessary to prevent damage to the cable. Cables shall be placed straight and parallel in the trays in a flat spaced arrangement. There shall be minimum crossing of cables in trays. Cables shall be secured to the tray with cable cleats designed for short circuit withstand bracing and installed at the manufacturer's recommended spacing. Identification markers shall be installed at intervals not to exceed 18 feet. After all work in the area containing new cables is complete, the trays shall be thoroughly cleaned of all dirt and trash generated by the new cable installation. Cable moved in the cleaning process shall be repositioned and final cable positions in the trays checked and corrected if necessary.

3.1.7 Bends

The minimum radius to which an insulated conductor or a multiconductor cable may be bent, without specific approval, whether permanently or temporarily during installation, shall be 12 times the overall diameter of the completed cable for tape shielded cables and 10 times the overall diameter for other cables. For multiconductor cable, follow manufacturer's recommendation for type of cable involved.

3.1.8 Cable Cleats

Cleats shall be provided for securing cables in cable tray. Cleats for supporting the weight of cables installed in vertical wireways shall be as required per NFPA 70 for adequate support. The size of each clamp shall be in accordance with the manufacturer's recommendations for each diameter and weight of cable to be secured or supported.

3.1.9 Splices

Splices in medium voltage cable will not be permitted.

3.1.10 Terminations

All cable shields shall be grounded at one end only unless otherwise indicated. Heat shrink, cold shrink or tape type stress conetubular segments terminating and splice kits shall be installed in accordance with the cable manufacturer's recommendations and as approved. Installation of the stress cone terminations shall be as described in the kit instructions, except the taping of conductor terminals shall be extended over the terminal fitting and the terminal of the device to which the conductor is attached.

3.1.11 Cable Identification

All cables shall be identified on both ends by the designations as shown on the Contract drawings or as otherwise shown on approved shop drawings.

All cables shall be clearly identified with the cable designation by either embossed 1-inch diameter brass tags, by embossed aluminum band markers, by tube-type markers as described in subparagraph Marking, or by 1-inch acrylic tags marked as described in subparagraph Marking. Tags or band markers shall be securely fastened to the cables at each termination, junction or pull box, where cables enter or leave cable trays, and as required at other points of access. Cables and individual conductors of multiconductor cables shall be identified with markers at each

SECTION 26 05 13.00 26 Page 12 termination. Installed markers shall be uniform in position on the cable and legends shall be visible when conductors are terminated at the equipment.

3.1.11.1 Marking

Tubing shall be sized to fit the wire being marked and shall have black marking on a light colored background. Tube-type markers shall be suitable for contact with the type of insulation material used. Tubing shall have permanent black marking on a light-colored background. The markers shall have been tested by an independent testing laboratory or by the manufacturer to indicate that the markers will not stain or discolor when subjected to an accelerated aging test while in contact with wire insulating materials and ultraviolet light exposure.

3.1.12 Ground Conductors

A ground conductor shall be run for all circuits. If not an integral part of a multiple conductor cable, a separate ground conductor shall be provided. Ground conductors shall be installed as continuous pieces of copper cable whenever possible. Exposed ground cable runs shall be supported to follow conduit, equipment or concrete wall contours. Support clamps or clips shall be of corrosion resistant metal and existing equipment bolts or screws shall be used where possible for fastening.

Drilling of equipment housings or frames will be permitted only when approved. Concrete anchors shall be used for wall fastening.

3.2 FIELD ACCEPTANCE TESTING

3.2.1 Testing

Testing shall be per IEEE 400 and NETA ATS recommended procedures.

a. Submit Test Reports in accordance with referenced standards in this section.

b. After completion of the installation and prior to energizing the conductors, perform wire and cable continuity and insulation tests as herein specified.

c. Contractor must provide all necessary test equipment, labor, and personnel to perform the tests, as herein specified.

d. Field Acceptance Testing and submittals shall be performed as described herein.

e. Isolate completely all wire and cable from all extraneous electrical connections at cable terminations and joints. Substation and switchboard feeder breakers, disconnects in combination motor starters, circuit breakers in panel boards, and other disconnecting devices must be used to isolate the circuits under test.

f. Suitable records shall be kept of all tests, indicating the insulation-resistance tests, high voltage tests, continuity tests, phase rotation tests high potential tests, and conductor identification markings. A duplicate record of all tests shall be furnished to the Contracting Officer. Prior to testing, the wire and cable test record form shall be submitted for approval. Test reports shall provide room for the Contracting Officer's signature. After

SECTION 26 05 13.00 26 Page 13 installation, but just prior to terminal connection, each conductor shall be tested as follows:

(1) Perform a Conductor Continuity Test on each wire and each individual conductor of a multiconductor cable to insure correct connections end-to-end.

(2) Perform a Shield Continuity Test on each cable shield to insure correct connections end-to-end.

(3) Perform a Shield Resistance Test on each cable shield.

Shield resistance shall be less than 10 ohms per 1000 feet of cable.

(4) Perform an Insulation Resistance Test on each field-installed conductor with respect to ground and adjacent conductors. Applied potential must be 1000 volts DC for 2.4kV rated cable, and 2500 volts DC for 5kV and 15kV rated cable. Minimum insulation resistance values must not be less than 500 Megohms for 2.4kV rated cable, 1000 Megohms for 5kV rated cable, and 5000 Megohms for 15kV rated cable.

(5) Perform High Potential Test on each field-installed conductor with respect to ground and adjacent conductors. Applied potential must be 23kV AC for 5kV rated cable, and 44kV AC for 15kV rated cable. The Contractor may perform DC testing only with the approval of the cable manufacturer for 36kV DC for 5kV rated cable, and 64kV DC for 15kV rated cable. Alternatively, the Contractor may perform any of the VLF tests described in IEEE 400.2.

(6) Perform a Phase Rotation Test on all three-phase circuits using a phase-rotation indicating instrument. Perform phase rotation of electrical connections to connected equipment clockwise, facing the source.

(7) Tests shall be witnessed by the Contracting Officer and the wire and cable installation test reports shall be submitted in accordance with Section 01 33 00, SUBMITTAL PROCEDURES.

3.2.2 Acceptance

Final acceptance will depend upon the successful performance of wire and cable under test. Conductor shall not be energized until the final test reports are reviewed and approved by the Contracting Officer.

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SECTION 26 05 13.00 26 Page 14