C04 - 8 - Combined Specs.pdf

Electrical System Repair, Switchgear Replacement 2.0 San Bernardino National Forest, California

1. Specification 024116 – Structure Demolition

2. Specifications 260010 - Supplemental Requirements for Electrical

3. Specifications 260011 – Facility Performance Requirements for Electrical

4. Specifications 260513 – Medium-Voltage Cables

5. Specifications 260526 – Grounding and Bonding for Electrical Systems

6. Specifications 260573 – Power System Studies

7. Specifications 261326 – Medium-Voltage Metal-Clad Switchgear

Region 5 Pacific Southwest

STRUCTURE DEMOLITION

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SECTION 024116 - STRUCTURE DEMOLITION

PART 1 - GENERAL

1.1 SUMMARY

A. The Work of this Section Includes:

1. Demolition and removal of existing 5KV Switchgear, components, and all materials associated with the work no longer required for the new infrastructure.

2. Demolition and removal of site improvements.

3. Removing below-grade construction.

4. Disconnecting, capping or sealing, and abandoning in-place site utilities.

5. Disconnecting, capping or sealing, and removing site utilities.

1.2 MATERIALS OWNERSHIP

A. Unless otherwise indicated, demolition waste becomes property of Contractor.

1.3 COORDINATION

A. Arrange demolition schedule so as not to interfere with Forest Service on-site operations.

1.4 PREINSTALLATION MEETINGS

A. Pre-demolition Conference: Conduct conference at Project site.

1.5 INFORMATIONAL SUBMITTALS

A. Survey of Existing Conditions: Submit survey.

B. Proposed Protection Measures: Submit report, including Drawings, that indicates the measures proposed for protecting individuals and property for environmental protection, for dust control and, for noise control. Indicate proposed locations and construction of barriers.

C. Schedule of building demolition activities with starting and ending dates for each activity.

1.6 CLOSEOUT SUBMITTALS

A. Inventory: Submit a list of items that have been removed and salvaged.

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1.7 FIELD CONDITIONS

A. Hazardous Materials:

a. Hazardous materials will be removed by Contractor before start of the Work.

b. It was observed that asbestos is present in some MV cables insulation. If materials suspected of containing hazardous materials are encountered, do not disturb;

immediately notify the Forest Service. Hazardous materials will be removed by the Contractor before the start of work.

B. On-site sale of removed items or materials is not permitted.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with governing EPA notification regulations before beginning demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ANSI/ASSP A10.6 and NFPA 241.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify that utilities have been disconnected and capped before starting demolition operations.

B. Existing Utilities to Remain: Maintain utility services to remain and protect against damage during demolition operations.

1. Do not interrupt existing utilities serving adjacent occupied or operating facilities unless authorized in writing by Owner and authorities having jurisdiction.

2. Provide at least 72 hours’ notice to occupants of affected buildings if shutdown of service is required.

C. Existing Utilities to Be Disconnected: Locate, identify, disconnect, and seal or cap off utilities serving buildings and structures to be demolished.

1. Owner will arrange to shut off utilities when requested by Contractor.

2. If disconnection of utility services will affect adjacent occupied buildings, then provide temporary utilities that bypass buildings and structures to be demolished and that maintain continuity of service to other buildings and structures.

3. Cut off pipe or conduit a minimum of 24 inches (610 mm) below grade at or outside the building or structure to be demolished and cap, valve, or plug and seal remaining portion of pipe or conduit in accordance with requirements of authorities having jurisdiction.

4. Do not start demolition work until utility disconnecting and sealing have been completed and verified in writing by authorities having jurisdiction.

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3.2 DEMOLITION, GENERAL

A. General: Demolish indicated outdoor switchgear completely. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. Do not use cutting torches until work area is cleared of flammable materials. Maintain portable fire-suppression devices during flame-cutting operations.

2. Maintain fire watch during and for at least 12 hours after flame-cutting operations.

3. Maintain adequate ventilation when using cutting torches.

4. Locate building demolition equipment as directed by the Forest Service and remove debris and materials from the site daily.

B. Site Access and Temporary Controls: Conduct building demolition and debris-removal operations to ensure minimum interference with roads, streets, walkways, parking spaces and other adjacent occupied and used facilities.

1. Do not close or obstruct streets, walks, walkways, or other adjacent occupied or used facilities without permission from Owner and authorities having jurisdiction. Provide alternate routes around closed or obstructed trafficways if required by authorities having jurisdiction.

2. Use water mist and other suitable methods to limit spread of dust and dirt. Comply with governing environmental-protection regulations. Do not use water when it may damage adjacent construction or create hazardous or objectionable conditions.

C. Explosives: Use of explosives is not permitted.

3.3 SITE RESTORATION

A. Below-Grade Areas:

1. Rough grade below-grade areas ready for further excavation or new construction.

2. Completely fill below-grade areas and voids resulting from building demolition operations with satisfactory soil materials or recycled pulverized concrete.

B. Site Grading: Uniformly rough grade area of demolished construction to a smooth surface, free from irregular surface changes. Provide a smooth transition between adjacent existing grades and new grades.

3.4 REPAIRS

A. Promptly repair damage to adjacent buildings caused by demolition operations.

3.5 DISPOSAL OF DEMOLISHED MATERIALS

A. Remove demolition of waste materials from the project site and dispose of them in an EPA-approved construction and demolition waste landfill acceptable to authorities having jurisdiction.

1. Do not allow demolished materials to accumulate on-site.

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2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

B. Do not burn demolished materials.

3.6 CLEANING

A. Clean adjacent structures and improvements of dust, dirt, and debris caused by building demolition operations. Return adjacent areas to condition existing before building demolition operations began.

END OF SECTION 024116

SUPPLEMENTAL REQUIREMENTS FOR ELECTRICAL 260010 - 1

SECTION 260010 - SUPPLEMENTAL REQUIREMENTS FOR ELECTRICAL

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Requirements generally applicable to all electrical Work on the Project, including but not limited to Work specified in Divisions 26

1.2 COORDINATION

A. Interruption of Existing Electrical Service: Do not interrupt electrical service to facilities occupied by Owner or others unless permitted under the following conditions:

1. Notify the COR, local POC and tenants no fewer than 72 hours in advance of proposed interruption of electrical service.

2. Do not proceed with interruption of electrical service without written permission.

3. Coordinate interruption with systems impacted by outage including, but not limited to, the following:

a. Exercising generators.

b. Emergency lighting.

c. Elevators.

d. Fire alarm systems.

e. Server Room

4. Facility will remain occupied during the outage. Plan and coordinate power requirements, interruptions, and reconfiguring the existing emergency generator (Prime and Standby) feeders to the building to maintain power during construction.

1.3 PREINSTALLATION MEETINGS

A. Electrical Preconstruction Conference: Schedule conference with the Owner, not later than [10] days after Notice to Proceed. Agenda topics include, but are not limited to, the following:

1. Electrical installation schedule.

2. Status of power system studies.

3. Utility work coordination and class of service requests.

4. Commissioning activities.

SUPPLEMENTAL REQUIREMENTS FOR ELECTRICAL 260010 - 2

1.4 SEQUENCING

A. Conduct and submit results of power system studies before submitting product data and shop drawings for electrical equipment as specified in Specifications 260573 Power System Studies.

1.5 ACTION SUBMITTALS

A. Coordination Drawings for Structural Supports: Show coordination of structural supports for equipment and devices, including restraints and bracing for control of seismic and wind loads, with other systems, equipment, and structural supports in the vicinity.

1.6 INFORMATIONAL SUBMITTALS

A. Electrical Installation Schedule: At preconstruction meeting, and periodically thereafter as dates change, provide schedule for electrical installation Work to Owner, but not limited to, milestone dates for the following activities:

1. Submission of power system studies.

2. Submission of specified coordination drawings.

3. Submission of action submittals specified in Division 26.

4. Orders placed for major electrical equipment.

5. Arrival of major electrical equipment on-site.

6. Preinstallation meetings specified in Division 26.

7. Utility service outages.

8. Utility service inspection and activation.

9. Mockup reviews.

10. System startup, testing, and commissioning activities for major electrical equipment.

11. Pouring concrete housekeeping pads for electrical equipment and testing concrete samples (as required).

12. Requests for inspections by authorities having jurisdiction.

B. Qualification Statements:

1. For professional structural engineer.

2. For professional electrical engineer.

3. For medium-voltage cable Installer.

4. For medium-voltage duct Installer.

5. For medium-voltage equipment Installer.

6. For medium-voltage electrical testing agency and on-site electrical testing supervisor.

7. For power-limited electrical testing agency and on-site power-limited testing supervisor.

1.7 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Data:

1. Provide emergency operation, normal operation, and preventive maintenance manuals for each system, equipment, and device listed below:

SUPPLEMENTAL REQUIREMENTS FOR ELECTRICAL 260010 - 3

a. Outdoor Metal Clad Switchgear

2. Include the following information:

a. Manufacturer's operating specifications.

b. User's guides for software and hardware.

c. Schedule of maintenance material items recommended to be stored at Project site.

d. Detailed instructions covering operation under both normal and abnormal conditions.

e. Time-current curves for overcurrent protective devices and manufacturer's written instructions for testing and adjusting their settings.

f. List of load-current and overload-relay heaters with related motor nameplate data.

g. List of lamp types and photoelectric relays used on the Project, with ANSI and manufacturers' codes.

h. Manufacturer's instructions for setting field-adjustable components.

i. Manufacturer's instructions for testing, adjusting, and reprogramming microprocessor controls.

j. EPSS: Manufacturer's system checklists, maintenance schedule, and maintenance log sheets in accordance with NFPA 110.

k. Exterior pole inspection and repair procedures.

PART 2 - PRODUCTS

2.1 SUBSTITUTION LIMITATIONS FOR ELECTRICAL EQUIPMENT

A. Substitution requests for electrical equipment will be entertained under the following conditions:

1. Substitution requests may be submitted for consideration prior to the Electrical Preconstruction Conference if accompanied by value analysis data indicating that substitution will comply with Project performance requirements while significantly increasing value for Owner throughout life of facility at no additional cost to the government.

2. Substitution requests may be submitted for consideration concurrently with submission of power system study reports when those reports indicate that substitution is necessary for safety of maintenance personnel and facility occupants at no additional cost to the government.

3. Contractor is responsible for sequencing and scheduling power system studies and electrical equipment procurement. After the Electrical Preconstruction Conference, insufficient lead time for electrical equipment delivery will not be considered a valid reason for substitution.

SUPPLEMENTAL REQUIREMENTS FOR ELECTRICAL 260010 - 4

PART 3 - EXECUTION

3.1 INSTALLATION OF ELECTRICAL WORK

A. Unless more stringent requirements are specified in the Contract Documents or manufacturers' written instructions, comply with NFPA 70 and NECA NEIS 1 for installation of electrical Work on the Project.

3.2 CLEANING

A. Contractor shall be responsible for the final cleanup and disposal of all demolished materials and equipment from the site.

END OF SECTION 260010

FACILITY PERFORMANCE REQUIREMENTS FOR ELECTRICAL 260011 - 1

SECTION 260011 - FACILITY PERFORMANCE REQUIREMENTS FOR ELECTRICAL

1.1 SUMMARY

A. Section Includes:

1. Field conditions and other facility performance requirements applicable to Work specified in Division 26.

1.2 FIELD CONDITIONS

A. Seismic Hazard Design Loads:

1. Unless otherwise indicated in Contract Documents, specified Work must withstand seismic hazard design loads determined in accordance with requirements specified in this Section, adjusted for installed elevation above or below grade.

a. The term "withstand" means "unit must remain in place without separation of parts from unit when subjected to specified seismic hazard design load and unit must be fully operational after seismic event

2. Perform calculations to obtain force information necessary to properly select seismic-restraint devices, fasteners, and anchorage. Perform calculations using methods acceptable to applicable code authorities. Where "ASCE/SEI 7" is used throughout this Section, it must be understood that the edition referred to in this subparagraph is the edition intended as reference throughout the Section Text.

a. Data indicated below to be determined by Delegated Design Contractor must be obtained by Contractor and must be included in individual component submittal packages.

b. Coordinate seismic design calculations with wind-load calculations for equipment mounted outdoors.

B. Wind Hazard Design Loads:

3. Perform calculations to obtain force information necessary to properly select wind-load restraint devices, fasteners, and anchorage. Perform calculations using methods acceptable to applicable code authorities. Where "ASCE/SEI 7" is used throughout this Section, it must be understood that the edition referred to in this subparagraph is intended as referenced throughout the Section Text unless otherwise indicated.

a. Data indicated below that are specific to individual pieces of equipment must be obtained by Contractor and must be included in individual component submittal packages.

FACILITY PERFORMANCE REQUIREMENTS FOR ELECTRICAL 260011 - 2

b. Coordinate design wind-load calculations with seismic-load calculations for equipment requiring both seismic- and wind-load reinforcement. Comply with requirements in other Sections in addition to those in this Section.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

END OF SECTION 260011

MEDIUM-VOLTAGE CABLES

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SECTION 260513 - MEDIUM-VOLTAGE CABLES

1.1 SUMMARY

A. Section Includes:

1. Cables.

2. Connectors.

3. Solid terminations.

4. Separable insulated connectors.

5. Splice kits.

6. Medium-voltage tapes.

7. Arc-proofing materials.

8. Fault indicators.

B. Related Requirements:

1. Section 260010 "Supplemental Requirements for Electrical" for additional abbreviations, definitions, submittals, qualifications, testing agencies, and other Project requirements applicable to Work specified in this Section.

2. Section 260011 "Facility Performance Requirements for Electrical" for seismic-load, wind-load, acoustical, and other field conditions applicable to Work specified in this Section.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of cable. Include splices and terminations for cables and cable accessories.

B. Samples: 16 inch (400 mm) lengths for each type of cable specified.

1.3 INFORMATIONAL SUBMITTALS

A. Field quality-control reports.

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. Comply with IEEE C2 and NFPA 70.

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C. Source Limitations: Obtain cables and accessories from single source from single manufacturer.

2.2 CABLES

A. Cable Type: (as specified by Designer and existing Utility requirements)

B. Conductor Insulation: (as specified by Designer and existing Utility requirements)

1. Voltage Rating: 5kV.

2. Insulation Thickness: 133 percent insulation level.

C. Conductor: Copper

D. Comply with UL 1072, AEIC CS8

E. Conductor Stranding: Compact round, concentric lay, Class B

F. Strand Filling: Conductor interstices are filled with impermeable compound.

G. Shielding: Copper tape, helically applied over semiconducting insulation shield.

H. Shielding and Jacket: Corrugated copper drain wires embedded in extruded, chlorinated, polyethylene jacket.

I. Three-Conductor Cable Assembly: Three insulated, shielded conductors cabled together with ground conductors.

J. Cable Jacket: Sunlight-resistant PVC

2.3 CONNECTORS

A. Comply with ANSI C119.4 for connectors between aluminum conductors or for connections between aluminum to copper conductors.

B. Copper-Conductor Connectors: Copper barrel crimped connectors.

2.4 SOLID TERMINATIONS

A. Multiconductor Cable Sheath Seals: Type recommended by seal manufacturer for type of cable and installation conditions, including orientation.

1. Cold-shrink sheath seal kit with preformed sleeve openings sized for cable and insulated conductors.

2. Heat-shrink sheath seal kit with phase- and ground-conductor rejacketing tubes, cable-end sealing boot, and sealing plugs for unused ground-wire openings in boot.

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B. Shielded-Cable Terminations: Comply with the following classes of IEEE 48. Insulation class shall be equivalent to that of cable. Include shield ground strap for shielded cable terminations.

1. Class 1 Terminations: Modular type, furnished as a kit, with stress-relief tube; multiple, molded-silicone-rubber, insulator modules; shield ground strap; and compression-type connector.

2.5 SEPARABLE INSULATED CONNECTORS

A. Description: Modular system with disconnecting, single-pole, cable terminators and with matching, stationary, plug-in, dead-front terminals designed for cable voltage and for sealing against moisture.

B. Standard: Comply with IEEE 386.

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

D. Load-Break Cable Terminators: Elbow-type units with 200 A load make/break and continuous-current rating; coordinated with insulation diameter, conductor size, and material of cable being terminated. Include test point on terminator body that is capacitance coupled.

E. Dead-Break Cable Terminators: Elbow-type unit with 200 A continuous-current rating; designed for de-energized disconnecting and connecting; coordinated with insulation diameter, conductor size, and material of cable being terminated. Include test points on terminator body that is capacitance coupled.

F. 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 and complete with grounding lug, manufacturer's standard accessory stands, stainless steel mounting brackets, and attaching hardware.

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

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

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

4. Standoff 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.

G. Test-Point Fault Indicators: Applicable current-trip ratings and arranged for installation in test points of load-break separable connectors, and complete with self-resetting indicators capable of being installed with shotgun hot stick and tested with test tool.

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

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2.6 SPLICE KITS

A. Description: For splicing medium voltage cables; type as recommended by cable or splicing kit manufacturer for the application.

B. Standard: Comply with IEEE 404.

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

2.7 MEDIUM-VOLTAGE TAPES

A. Description: Electrical grade, insulating tape for medium voltage application.

B. Ethylene/propylene rubber-based, 30 mil (0.76 mm) splicing tape, rated for 130 deg C operation.

Minimum 3/4 inch (20 mm) wide.

C. Silicone rubber-based, 12 mil (0.30 mm) self-fusing tape, rated for 130 deg C operation.

Minimum 1-1/2 inch (38 mm) wide.

D. Insulating-putty, 125 mil (3.175 mm) elastic filler tape. Minimum 1-1/2 inches (38 mm) wide.

2.8 ARC-PROOFING MATERIALS

A. Tape for First Course on Metal Objects: 10 mil (250 micrometer) thick, corrosion-protective, moisture-resistant, PVC pipe-wrapping tape.

B. Arc-Proofing Tape: Fireproof tape, flexible, conformable, intumescent to 0.3 inch (8 mm) thick, and compatible with cable jacket.

C. Glass-Cloth Tape: Pressure-sensitive adhesive type, 1 inch (25 mm) wide.

2.9 FAULT INDICATORS

A. Indicators: Automatically reset fault indicator with inrush restraint feature, arranged to clamp to cable sheath and provide a display after a fault has occurred in cable. Instrument shall not be affected by heat, moisture, and corrosive conditions and shall be recommended by manufacturer for installation conditions.

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

2.10 SOURCE QUALITY CONTROL

A. Test and inspect cables according to ICEA S-97-682 before shipping.

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B. Test strand-filled cables for water-penetration resistance according to ICEA T-31-610, using a test pressure of 5 psig (35 kPa).

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install cables according to IEEE 576.

B. Proof conduits prior to conductor installation by passing a wire brush mandrel and then a rubber duct swab through the conduit. Separate the wire brush and the rubber swab by 48 to 72 inch (1200 to 1800 mm) on the pull rope.

1. Wire Brush Mandrel: Consists of a length of brush approximately the size of the conduit inner diameter with stiff steel bristles and an eye on each end for attaching the pull ropes.

If an obstruction is felt, pull the brush back and forth repeatedly to break up the obstruction.

2. Rubber Duct Swab: Consists of a series of rubber discs approximately the size of the conduit inner diameter on a length of steel cable with an eye on each end for attaching the pull ropes. Pull the rubber duct swab through the duct to extract loose debris from the duct.

C. Pull Conductors: Do not exceed manufacturer's recommended maximum pulling tensions and sidewall pressure values.

1. Where necessary, use manufacturer-approved pulling compound or lubricant that does not deteriorate conductor or insulation.

2. Use pulling means, including fish tape, cable, rope, and basket-weave cable grips, that do not damage cables and raceways. Do not use rope hitches for pulling attachment to cable.

3. Use pull-in guides, cable feeders, and draw-in protectors as required to protect cables during installation.

4. Do not pull cables with ends unsealed. Seal cable ends with rubber tape.

D. Install exposed cables parallel and perpendicular to surfaces of exposed structural members and follow surface contours where possible.

E. bed of 3 inch (75 mm) thick, clean sand. Separate cables crossing other cables or piping by a minimum of 2 inch (50 mm) of tamped earth, plus an additional 2 inch (50 mm) of sand. Install permanent markers at ends of cable runs, changes in direction, and buried splices.

F. Install "buried-cable" warning tape 12 inch (305 mm) above cables.

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

H. Install sufficient cable length to remove cable ends under pulling grips. Remove length of conductor damaged during pulling.

I. Install cable splices at pull points and elsewhere as indicated; use standard kits.

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

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K. Install separable insulated-connector components as follows:

1. Protective Cap: At each terminal junction, with one on each terminal to which no feeder is indicated to be connected.

2. Portable Feed-Through Accessory: At each terminal junction, with one on each terminal.

3. Standoff Insulator: At each terminal junction, with one on each terminal.

L. Arc Proofing: Unless otherwise indicated, arc proof medium-voltage cable at locations not protected by conduit, cable tray, direct burial, or termination materials. In addition to arc-proofing tape manufacturer's written instructions, apply arc proofing as follows:

1. Clean cable sheath.

2. Wrap metallic cable components with 10 mil (250 micrometer) pipe-wrapping tape.

3. Smooth surface contours with electrical insulation putty.

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

5. Band arc-proofing tape with two layers of 1 inch (25 mm) wide half-lapped, adhesive, glass-cloth tape at each end of the arc-proof tape.

M. Seal around cables passing through fire-rated elements according to Section 078413 "Penetration Firestopping."

N. Install fault indicators on each phase where indicated.

O. Ground shields of shielded cable at terminations, splices, and separable insulated connectors.

Ground metal bodies of terminators, splices, cable and separable insulated-connector fittings, and hardware.

P. Ground shields of shielded cable at one point only. Maintain shield continuity and connections to metal connection hardware at all connection points.

Q. Identify cables according to Section 260553 "Identification for Electrical Systems." Identify phase and circuit number of each conductor at each splice, termination, pull point, and junction box. Arrange identification so that it is unnecessary to move the cable or conductor to read the identification.

3.2 FIELD QUALITY CONTROL

1. Electrical test stated in NETA ATS. Certify compliance with test parameters.

2. After installing medium-voltage cables and before electrical circuitry has been energized, test for compliance with requirements.

3. Perform Partial Discharge test of each new conductor according to NETA ATS, Ch. 7.3.3 and to test equipment manufacturer's recommendations.

4. Perform Dissipation Factor test of each new conductor according to NETA ATS, Ch. 7.3.3 and to test equipment manufacturer's recommendations.

B. Prepare test and inspection reports.

END OF SECTION 260513

GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS

260526 - 1

SECTION 260526 - GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS

1.1 SUMMARY

A. Section Includes:

1. Grounding and bonding conductors.

2. Grounding and bonding clamps.

3. Grounding and bonding bushings.

4. Grounding and bonding hubs.

5. Grounding and bonding connectors.

6. Intersystem bonding bridge grounding connectors.

7. Grounding and bonding busbars.

8. Signal reference grids.

9. Grounding (earthing) electrodes.

10. Grounding electrode enclosures.

B. Related Requirements:

1. Section 260010 "Supplemental Requirements for Electrical" specifies additional requirements applicable to coordinating, scheduling, and sequencing of the Work specified in this Section.

2. Product Listing: Include copy of unexpired approval letter, on letterhead of qualified electrical testing agency, certifying product's compliance with specified listing criteria.

C. Shop Drawings: Prepare and submit the following:

1. Plans showing dimensioned locations of grounding features described in "Field Quality Control for Grounding and Bonding" Article, including the following:

a. Grounding electrode access enclosures.

b. Grounding electrodes.

c. Grounding arrangements and connections for separately derived systems.

D. Field quality-control reports.

1.2 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Data:

1. In addition to items specified in Section 260010 "Supplemental Requirements for Electrical," include the following:

a. Plans showing locations of grounding features described in "Field Quality Control for Grounding and Bonding" Article, including the following:

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1) Grounding electrode access enclosures.

2) Grounding electrodes.

3) Grounding arrangements and connections for separately derived systems.

b. Instructions for periodic testing and inspection of grounding features at grounding connections for separately derived systems based on NFPA 70B 2023.

1) Tests must determine if ground-resistance or impedance values remain within specified maximums, and instructions must recommend corrective action if values do not.

2) Include recommended testing intervals.

1.3 QUALIFICATIONS

A. Electrical Power Testing and Inspecting Agency: Entities possessing active credentials from a qualified electrical testing laboratory recognized by authorities having jurisdiction.

1.4 SERVICE CONDITIONS FOR ELECTRICAL EQUIPMENT

A. Electrical and ICT Equipment Grounding (Earthing): Do not exceed 10 Ω resistance to ground (earth).

1. Contact Engineer of Record for resolution if 10 Ω specified resistance to ground (earth) is not attained after second attempt to increase effectiveness of grounding (earthing) electrode.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Regulatory Requirements: Products or components listed and labeled in accordance with NFPA 70, by qualified electrical testing laboratory recognized by authorities having jurisdiction and marked for intended location and application.

2.2 GROUNDING AND BONDING CONDUCTORS

A. Equipment Grounding Conductor:

1. Standard Features: 600 V, THHN/THWN-2 or THWN-2, copper wire or cable, green color, in accordance with the NEC.

B. Isolated Equipment Grounding Conductor:

1. Standard Features: 600 V, THHN/THWN-2 or THWN-2, copper wire or cable, green with one or more yellow stripes, in accordance with the NEC.

C. ASTM - Bare Copper Grounding and Bonding Conductor:

1. Standard Features: Complying with one or more of the following:

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a. Soft or Annealed Copper Wire: ASTM B3.

b. Concentric-Lay Stranded Copper Conductor: ASTM B8.

c. Tin-Coated Soft or Annealed Copper Wire: ASTM B33.

d. 19-Wire Combination Unilay-Stranded Copper Conductor: ASTM B787/B787M.

2.3 GROUNDING AND BONDING CLAMPS

A. Description: Clamps suitable for attachment of grounding and bonding conductors to grounding electrodes, pipes, tubing, and rebar. Grounding and bonding clamps specified in this article are also suitable for use with communications applications.

2.4 GROUNDING AND BONDING CONNECTORS

A. UL KDER - Pressure-Type Grounding and Bonding Busbar Cable Connector

1. Listing Criteria: Investigated, labeled, and marked by qualified electrical testing laboratory in accordance with guided information and standards specified for the following UL product categories:

a. Grounding and Bonding Equipment: UL CCN KDER; including UL 467.

b. Grounding and Bonding Equipment for Communications: UL CCN KDSH;

including UL 467.

2. Standard Features: Copper or copper alloy, for compression bonding of one or more conductors directly to copper busbar. Listed for direct burial.

a. Grounding and Bonding Equipment: UL CCN KDER; including UL 467.

b. Grounding and Bonding Equipment for Communications: UL CCN KDSH;

including UL 467.

3. Standard Features: Bolts that surround cable and bond to cable under compression when nut is tightened.

a. Copper

4. Standard Features: Zinc-alloy one-piece construction; six terminating points; gangable.

a. Bus: Rectangular bar of annealed copper.

b. Mounting Stand-Off Insulators: Lexan or PVC.

1) Comply with UL 891 for use in 600 V switchboards, impulse tested at 5000 V.

c.

2.5 SIGNAL REFERENCE GRIDS

A. Description: Means for providing low-impedance path to ground over a large area, approximating an equipotential plan, while simultaneously mitigating large current spikes from faults or lightning.

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B. UL KDER - Mesh-Type Signal Reference Grid

1. Listing Criteria: Investigated, labeled, and marked by qualified electrical testing laboratory in accordance with guided information and standards specified for the following UL product categories:

a. Grounding and Bonding Equipment: UL CCN KDER; including UL 467.

2. Standard Features: Conductive metal wire mesh for field-fabrication of grid.

2.6 GROUNDING (EARTHING) ELECTRODES

A. UL KDER - Rod Electrode

1. Listing Criteria: Investigated, labeled, and marked by qualified electrical testing laboratory in accordance with guided information and standards specified for the following UL product categories:

a. Grounding and Bonding Equipment: UL CCN KDER; including UL 467.

2. Standard Features: Copper-clad 3/4 inch by 10 ft (19 mm by 3 m)

2.7 GROUNDING ELECTRODE ENCLOSURES

A. Description: Enclosures designed to protect grounding electrodes from damage while providing access for inspection and testing of the grounding system.

B. Grounding Electrode Access Well Enclosure

1. Standard Features:

a. Well Material: Concrete

b. Cover Material Concrete

c. Cover Strength: Sidewalk or turf use

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine facility's grounding electrode system and equipment grounding for compliance with requirements for maximum ground-resistance level and other conditions affecting performance of grounding and bonding of electrical system.

B. Inspect test results of grounding system measured at point of electrical service equipment connection.

C. Prepare written report, endorsed by Installer, listing conditions detrimental to performance of the Work.

D. Proceed with connection of electrical service equipment only after unsatisfactory conditions have been corrected.

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3.2 SELECTION OF GROUNDING AND BONDING PRODUCTS

A. Grounding and Bonding Conductors:

1. Provide solid conductors for 8 AWG and smaller, and stranded conductors for 6 AWG and larger unless otherwise indicated.

2. Custom-Length Insulated Equipment Bonding Jumpers: 6 AWG, 19-strand, Type THHN.

B. Grounding and Bonding Connectors:

1. Pipe and Equipment Grounding Conductor Terminations: Bolted connectors.

2. Underground Connections: Welded connectors except at test wells and as otherwise indicated.

3. Connections to Ground Rods at Test Wells: Bolted connectors.

4. Connections to Structural Steel: Welded connectors.

C. Grounding and Bonding Busbars: Provide in electrical equipment rooms, in rooms housing service equipment, and elsewhere as indicated on the Drawings.

D. Substation Signal Reference Grid:

1. Unless more stringent requirements are specified in Contract Documents or manufacturers' published instructions, comply with IEEE C2.

a. Install 6 AWG or wire size from fault calculation bonding conductors below grade in a grid pattern on 2 ft (600 mm) centers. Bond grid conductors with exothermic welds where they cross each other.

b. Grid must fill entire area inside equipment yard fence and extend minimum 6.5 ft (2 m) outside fence, so someone walking or running outside yard may not touch fence or open gate without first stepping inside grid.

c. Bond each metal fence post and gate post to at least two grid conductors.

d. Inside grid, bond equipment reinforcing steel inside bases and sidewalks to at least two grid conductors.

e. Bond underground metal pipe and conduit passing under grid to nearest grid conductor at both ends.

3.3 INSTALLATION OF GROUNDING AND BONDING

A. Comply with manufacturer's published instructions.

B. Reference Standards:

1. Electrical Construction: ICC IBC, ICC IFC, NFPA 1, NFPA 70, and NECA NEIS 1.

2. Electrical Maintenance: NFPA 70B.

3. Electrical Safety: NFPA 70E.

4. Grounding and Bonding: NECA NEIS 331 and Article 250 of NFPA 70.

5. Emergency and Standby Power Work: NFPA 110, NFPA 111, and NECA NEIS 416.

6. Work in Confined Spaces: NFPA 350.

7. Work in Basements and Other Developed Subterranean Spaces: NFPA 520.

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8. Ground Bonding Common with Lightning Protection System: Comply with NFPA 780 and UL 96 when interconnecting with lightning protection system. Bond electrical power system ground directly to lightning protection system grounding conductor at closest point to electrical service grounding electrode. Use bonding conductor sized same as system grounding electrode conductor and install in conduit.

9. Consult Engineer of Record for resolution of conflicting requirements.

C. Protection: After installation, protect grounding and bonding cables and equipment from construction activities. Remove and replace items that are contaminated, defaced, damaged, or otherwise caused to be unfit for use prior to acceptance by Owner.

3.4 FIELD QUALITY CONTROL FOR GROUNDING AND BONDING

A. Administration for Electrical Power Tests and Inspections:

1. Owner will engage in qualified electrical testing and inspecting agency to administer and perform tests and inspections.

2. Engage qualified electrical testing and inspecting agency to administer and perform tests and inspections.

3. Engage factory-authorized service representatives to administer and perform tests and inspections on components, assemblies, and equipment installations, including connections.

4. Administer and perform tests and inspections with assistance of factory-authorized service representative.

B. Acceptance Testing Preparation:

C. Field tests and inspections must be witnessed by authorities having jurisdiction

D. Tests and Inspections:

1. After installing grounding system, before permanent electrical circuits have been energized, test for compliance with requirements.

2. Inspect physical and mechanical condition. Verify tightness of accessible, bolted, electrical connections with calibrated torque wrench in accordance with manufacturer's published instructions.

3. Test completed grounding system at each location where maximum ground-resistance level is specified, at service disconnect enclosure grounding terminal, at ground test well, and at individual ground rods. Make tests at ground rods before conductors are connected.

a. Measure ground resistance no fewer than two full days after last trace of precipitation and without soil being moistened by means other than natural drainage or seepage and without chemical treatment or other artificial means of reducing natural ground resistance.

b. Perform tests by fall-of-potential method in accordance with IEEE Std 81.

c. Excessive Ground Resistance: If resistance to ground exceeds specified values, notify Architect promptly and include recommendations to reduce ground resistance.

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4. Prepare dimensioned Drawings locating each test well, ground rod and ground-rod assembly, and other grounding electrodes. Identify each by letter in alphabetical order and key to record tests and observations. Include number of rods driven and their depth at each location and include observations of weather and other phenomena that may affect test results. Describe measures taken to improve test results.

E. Nonconforming Work:

1. Grounding system will be considered defective if it does not pass tests and inspections.

2. Remove and replace defective components and retest.

F. Collect, assemble, and submit test and inspection reports.

1. Report measured ground resistances that exceed the following values:

a. Power and Lighting Equipment or System with Capacity of 500 kVA and Less: 10 Ω

b. Power and Lighting Equipment or System with Capacity of 500 to 1000 kVA: 5 Ω

c. Power and Lighting Equipment or System with Capacity More Than 1000 kVA: 3 Ω

d. Power Distribution Units or Panelboards Serving Electronic Equipment: 1 Ω

e. Substations and Pad-Mounted Equipment: 5 Ω

f. Manhole Grounds: 10 Ω

END OF SECTION 260526

POWER SYSTEM STUDIES

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SECTION 260573 - POWER SYSTEM STUDIES

1.1 SUMMARY

A. The Work of this Section Includes:

1. Short-circuit study.

2. Overcurrent protective device coordination study.

3. Load-flow and voltage-drop study.

4. Arc-flash hazard study.

B. Related Requirements:

1. Section 260010 "Supplemental Requirements for Electrical" specifies additional requirements applicable to coordinating, scheduling, and sequencing of the Work specified in this Section.

1.2 ACTION SUBMITTALS

A. Product Data: For power system analysis software to be used for studies.

1. Product Certificates: For power system study software applications, including certificate stating compliance with specified requirements, signed by software manufacturer.

B. Power System Study Reports:

1. Submit reports after approval of system protective devices submittals. Submittals must be in digital form.

2. Submit short-circuit study input data, including completed computer-program input data sheets.

3. Submit coordination study input data, including completed computer-program input data sheets.

a. Submit load-flow and voltage-drop, with coordination study.

4. Submit arc-flash study input data, including completed computer-program input data sheets.

5. Submit study report for action prior to receiving final approval of distribution equipment submittals. If formal completion of studies cause delay in equipment manufacturing, obtain approval from Engineer of Record for preliminary submittal of sufficient study data to ensure that selection of devices and associated characteristics is satisfactory.

6. Submit revised one-line diagram, reflecting field investigation results and results of short-circuit study.

C. Data files for studies in format compatible with Owner's power system analysis software.

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D. Digital-twin models.

1.3 QUALITY ASSURANCE

A. Submittals for power system studies must be signed and sealed by qualified professional electrical engineer (State of California) responsible for their preparation.

B. Studies must be performed using commercially developed and distributed software designed specifically for power system analysis.

C. Software algorithms must comply with requirements of standards and guides specified in this Section.

D. Manual calculations are unacceptable.

PART 2 - PRODUCTS

2.1 POWER SYSTEM ANALYSIS SOFTWARE

A. Standard Features:

1. Power System Analysis:

a. Power-systems-analysis software applications must have analytical capability to calculate "mandatory," "very desirable," and "desirable" features as listed in IEEE 3002 series standards.

b. Computer software applications must be capable of plotting and diagramming time-current-characteristic curves as part of their output. Computer software programs must report device settings and ratings of overcurrent protective devices and must demonstrate selective coordination by computer-generated, time-current coordination plots.

c. Computer software applications must be designed to perform arc-flash analysis or have function, component, or add-on module designed to perform arc-flash analysis.

2. Analysis Standards:

a. Short-Circuit Current Analysis: In accordance with IEEE 3002.3.

b. Device Coordination Analysis: In accordance with IEEE 3004.3 and IEEE 3004.5.

c. Load-Flow Analysis: In accordance with IEEE 3002.2.

d. Motor-Starting Analysis: In accordance with IEEE 3002.7.

e. Harmonic Analysis: In accordance with IEEE 3002.8.

f. Transient Stability Analysis: In accordance with IEEE P3002.9.

g. Arc-Flash Hazard Analysis: In accordance with IEEE 1584.

3. Capable of printing arc-flash hazard warnings for equipment on vinyl weather- and UV-resistant, pressure-sensitive adhesive labels complying with NFPA 70E.

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a. Label must have orange header with wording, "WARNING, ARC-FLASH HAZARD," and must include the following information taken directly from arc-flash hazard study:

1) Equipment designation.

2) Nominal voltage.

3) Protection boundaries.

a) Arc-flash boundary.

b) Restricted approach boundary.

c) Limited approach boundary.

4) Arc-flash PPE category.

5) Required minimum arc rating of PPE in Cal/cm squared.

6) Available incident energy.

7) Working distance.

8) Engineering report number, revision number, and issue date.

B. Other Available Features Required by the Project:

1. Explicit negative sequence.

2. Mutual coupling in zero sequence.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Collect and analyze data for power system studies.

1. Verify completeness of data supplied in one-line diagram on Drawings. Call discrepancies for Engineer of Record attention.

2. For equipment included as Work on the Project, use characteristics submitted under provisions of action submittals and information submittals for the Project.

3. For equipment that exists to remain, obtain required electrical distribution system data by field investigation and surveys, conducted by qualified technicians and engineers in accordance with NFPA 70E.

4. Gather and tabulate required input data to support power system studies. Comply with requirements in Section 017839 "Project Record Documents" for recording circuit protective device characteristics. Record data on Record Document copy of one-line diagram. Comply with recommendations in IEEE 3002 series standards as to amount of detail that is required to be acquired in field. Field data gathering must be by, or under supervision of, qualified professional electrical engineers. Data includes, but are not limited to, the following:

a. Product data for the Project's overcurrent protective devices involved in overcurrent protective device coordination studies. Use equipment designation tags that are consistent with electrical distribution system diagrams, overcurrent protective device submittals, input and output data, and recommended device settings.

b. Electrical power utility impedance at service.

c. Power sources and ties.

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d. Short-circuit current at each bus system (three phase and line to ground).

e. Full-load current of loads.

f. Voltage level at each bus.

g. For transformers, include kVA, primary and secondary voltages, connection type, impedance, X/R ratio, taps measured in percent, and phase shift.

h. For reactors, provide manufacturer and model designation, voltage rating, and impedance.

i. For circuit breakers and fuses, provide manufacturer and model designation. List type of breaker, type of trip and available range of settings, SCCR, current rating, and breaker settings.

j. Generators short-circuit current contribution data, including short-circuit reactance, rated kVA, rated voltage, and X/R ratio.

k. For relays, provide manufacturer and model designation, current transformer ratios, potential transformer ratios, and relay settings.

l. Maximum demands from service meters.

m. Busway manufacturer and model designation, current rating, impedance, lengths, and conductor material.

n. Motor horsepower and NEMA MG 1 code letter designation.

o. Low-voltage cable sizes, lengths, number, conductor material, and conduit material

(magnetic or nonmagnetic).

p. Medium-voltage cable sizes, lengths, conductor material, cable construction, metallic shield performance parameters, and conduit material (magnetic or nonmagnetic).

q. Derating factors.

3.2 PREPARATION

A. Preparation of Data for Short-Circuit Study:

1. Verify completeness of data supplied on one-line diagram. Call discrepancies to Architect's attention.

2. For equipment included as Work on the Project, use characteristics submitted under provisions of action submittals and information submittals for the Project.

3. Prepare one-line diagram of modeled power system, showing the following:

a. Protective device designations and ampere ratings.

b. Conductor types, sizes, and lengths.

c. Transformer kVA and voltage ratings.

d. Motor and generator designations and kVA ratings.

e. Switchgear, switchboard, motor-control center, and panelboard designations and ratings.

f. Derating factors and environmental conditions.

g. Revisions to electrical equipment required by study.

B. Preparation of Data for Overcurrent Protective Device Coordination Study:

1. Prepare data sheets to supplement electrical distribution system one-line diagram, cross-referenced with tag numbers on diagram, indicating the following:

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a. Special load considerations, including starting inrush currents and frequent starting and stopping.

b. Transformer characteristics, including primary protective device, magnetic inrush current, and overload capability.

c. Motor full-load current, locked rotor current, service factor, starting time, type of start, and thermal-damage curve.

d. Generator thermal-damage curve.

e. Ratings, types, and settings of utility company's overcurrent protective devices.

f. Special overcurrent protective device settings or types stipulated by utility company.

g. Time-current-characteristic curves of devices indicated to be coordinated.

h. Manufacturer, frame size, interrupting rating in amperes root mean square (rms) symmetrical, ampere or current sensor rating, long-time adjustment range, short-time adjustment range, and instantaneous adjustment range for circuit breakers.

i. Manufacturer and type, ampere-tap adjustment range, time-delay adjustment range, instantaneous attachment adjustment range, and current transformer ratio for overcurrent relays.

j. Switchgear, switchboards, motor-control centers, and panelboards ampacity, and SCCR in amperes rms symmetrical.

k. Identify series-rated interrupting devices for condition where available fault current is greater than interrupting rating of…