GENERAL ELECTRICAL-16010 1

SECTION 16010 – GENERAL ELECTRICAL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS:

Drawings and general provisions of Contract, including General Conditions and Supplementary General Conditions sections apply to work specified in Division 16.

1.2 DESCRIPTION OF WORK:

Furnish all labor, materials, equipment, and incidentals required to complete all electrical work as specified herein and shown on the Contract Drawings.

The work, apparatus and materials furnished under these Specifications and accompanying Drawings shall include all items listed here and shown on the Drawings. Line voltage connections to equipment furnished as specified in other sections of these Specifications or shown on other than the Electrical Drawings shall be governed by this Division of the Specifications.

Each bidder or his authorized representatives shall visit the job sites and carefully inspect the present conditions before preparing his bid. The submission of a bid will be considered evidence that such a visit and inspection was performed by the bidder and that he takes full responsibility for all factors governing his work.

It is the intent of these Specifications and Drawings that the electrical systems shall be complete, fully operational, and suitable in every way for the service required. Drawings are diagrammatic in nature and do not show in every detail all devices and incidental materials necessary to accomplish the intent. Therefore, the Contractor shall understand that such devices and incidental materials required shall be furnished at no cost to the Owner.

1.3 TEMPORARY POWER:

Provide temporary power during construction as required to keep critical items from prolonged power outages. This could be items such as refrigerators, freezers, IT equipment, etc.. This could consist of temporary utility power pole, rental generators, etc. Contractor shall be responsible for connecting portable power equipment to any critical equipment.

The Contractor shall pay all service connection fees for temporary power installation and all electrical bills for temporary construction power or rental generator units required to complete the project.

Temporary wiring shall be done in a safe and neat manner. See Article 305 of the NEC.

GENERAL ELECTRICAL-16010 2

1.4 SUBMITTALS:

Manufacturers' data in the form of "cut sheets" and engineering drawings shall be submitted to the Engineer on the equipment listed below and in other Sections of Division 16 before delivery to the work site. Review of the submittal by the Engineer is to check for general conformance to the design intent and shall not relieve the Contractor of the responsibility for the correctness of all dimensions and the correct fitting of all parts of the work.

Standby Generator (Pre-purchased and provided by the owner) Transfer Switches (Pre-purchased and provided by the owner) Switchboards Circuit Breakers

The manufacturers' names and catalog numbers shall be submitted for the following materials:

Conduit, Fittings, and Couplings Boxes and Fittings 600 Volt Wire

The submittal shall be thoroughly checked by the Contractor for accuracy and compliance with the contract requirements. Shop drawings and "cut sheets" shall bear the date checked and shall be accompanied by a statement by the Contractor that they have been checked for conformity to Specifications and Drawings. Shop submittals not so checked and noted will be returned without review.

1.5 CODES, INSPECTION AND FEES:

Division 16 work shall be in accordance with the latest edition of the following codes and ordinances:

The National Electrical Code (NFPA 70) The National Electrical Safety Code The Life Safety Code (NFPA 101) The Southern Standard Building Code (SBCCI) Serving Utility Company State and Municipal

Contractor shall pay all fees for permits and inspections.

1.6 RECORD DRAWINGS:

GENERAL ELECTRICAL-16010 3

At Job Close-out submit electronic copies of the following:

Clean, complete, and accurate sets of Record Drawings marked up to clearly indicate any deviations to the Contract Drawings.

Equipment Operation and Maintenance Instructions

Test results required in other sections of this division.3

1.7 GUARANTEES:

In addition to the guarantee of equipment by the manufacturer the Contractor shall also guarantee such equipment for a period of one (1) year from final acceptance by the Owner. The Contractor's one (1) year guarantee shall be for equipment, materials, and labor.

Additional guarantee requirements may be in the General and Special Conditions of these specifications.

PART 2 - PRODUCTS

2.1 EQUIPMENT AND MATERIALS:

Furnish materials or equipment specified by manufacturer's names unless approval of other manufacturers is listed in addendum to these specifications.

The materials furnished shall be new, undamaged, and packed in the original manufacturer's packing.

Equipment and materials shall always be protected during construction from mechanical and water damage. Equipment shall not be stored out-of-doors. Damaged materials and equipment shall be replaced by the Contractor at no cost to the Owner.

All electrical panels, enclosures, raceways, conduit, and boxes shall be fabricated of metal unless indicated otherwise.

2.2 EQUIPMENT AND MATERIALS STANDARDS:

The design and fabrication of electrical equipment and materials furnished under Division 16 shall comply with the latest edition and revisions of the following codes and standards:

The American National Standards Institute (ANSI) The American Society of Mechanical Engineers (ASME)

GENERAL ELECTRICAL-16010 4

The American Society for Testing and Materials (ASTM) The Institute of Electrical and Electronic Engineers (IEEE) The National Electrical Manufacturers Association (NEMA) The Occupational Safety and Health Administration (OSHA) The Underwriters Laboratories (UL) The National Fire Protection Association (NFPA) The National Electrical Code (NEC)

PART 3 - EXECUTION

3.1 SUPERVISION

Electrical work shall be supervised by a licensed journeyman or master electrician who shall be always on the job site while work is in progress.

3.2 EQUIPMENT IDENTIFICATION:

Engraved nameplates shall be of laminated plastic with black surface and white 1/8" high letters secured with stainless steel screws.

All major components of the distribution system shall have engraved nameplates.

Placard(s) with the maximum available fault current and date obtained shall be installed on the service disconnects. The maximum fault current shall be obtained from the serving power company by the contractor to provide the placard.

3.3 CLEANING:

All equipment and boxes should be thoroughly cleaned inside and outside at the completion of installation. Do not leave dirt and debris inside panelboard and equipment cabinets, device and junction boxes, etc.

3.4 PAINTING:

Touchup scratched or marred surfaces of lighting fixtures, panelboards, switchboards, etc. with paint furnished by the equipment manufacturers specifically for the purpose.

3.5 EXCAVATION, TRENCHING AND BACKFILLING:

Perform all excavation and trenching to install raceways indicated on the drawings.

No tunneling shall be allowed unless written permission is received by the Architect / Engineer.

GENERAL ELECTRICAL-16010 5

Excavated material not suitable for backfill shall be removed from the job site.

Insure that the bottom of trenches is uniform (without large rocks or lumps of dirt) which could damage the raceway or conductors.

Backfill with material that will be compacted readily.

Compact backfill material, from bottom of excavation up, to 95% of surrounding undisturbed material.

Cover shall not be less than surrounding grade and no greater than 2" above surrounding grade.

3.6 TESTS:

Contractor shall test all wiring for shorts and proper grounding before energizing. Equipment shall be thoroughly checked and adjusted for proper operation. Motors shall be checked for proper rotation to ensure rotation has not been unintentionally changed during construction. This applies to utility power and generator power.

Perform ground resistance testing as indicated in grounding specification.

END OF SECTION 16010

RACEWAYS AND FITTINGS-16110 1

SECTION 16110 – RACEWAYS AND FITTINGS

1.1 SCOPE OF WORK:

Furnish and install complete raceway systems as indicated on the Drawings and as specified here.

1.2 APPLICATIONS:

All interior and above grade exterior wiring shall be installed in a rigid aluminum metal conduit, and all embedded in concrete or below grade wiring shall be in PVC conduit unless indicated otherwise on the drawings.

Service conductors from power company pad mount transformer to service disconnects shall installed in schedule 80 rigid PVC with warning ribbon at least 12 inches above conduits.

Schedule 40 rigid PVC is suitable for feeders that are not exposed to heavy vehicle traffic. Areas exposed to heavy vehicle traffic such as crossing roadways or parking lots shall have schedule 80 rigid PVC for at least those areas.

All exterior, above grade, conduits shall be rigid aluminum.

Liquid Tight flexible metal raceway is acceptable as long as installed per NEC.

All conduit of a given type shall be the product of one manufacturer.

PART 2 - PRODUCTS

2.1 RIGID CONDUIT AND FITTINGS:

Rigid aluminum conduit shall be conforming to the requirements of UL 6 and ANSI C80.1 standards.

Fittings for rigid aluminum conduit shall be the threaded type manufactured by RACO, Steel City, or Thomas & Betts (T&B).

Plastic conduit for direct burial shall be UL labeled Schedule 40 PVC manufactured to NEMA TC 2-1983 specifications, WC-1094A Federal specifications, and UL-651 specifications.

Fittings for plastic conduit shall be manufactured to NEMA TC 3-1982 specifications.

RACEWAYS AND FITTINGS-16110 2

2.2 FLEXIBLE METAL CONDUIT, COUPLINGS, AND FITTINGS:

All flexible metal conduit for damp or exterior applications shall be Liquid Tight UL listed spiral wound galvanized steel with a PVC outer jacket type.

Fittings for liquid tight conduit shall be manufactured RACO, Steel City, or T&B.

2.3 CONDUIT MOUNTING EQUIPMENT:

Hangers, rods, backplates, beam clamps etc. shall be hot-dipped galvanized iron, steel, or aluminum suitable for in a corrosive environment. They shall be as manufactured by the Appleton Electric Co., Thomas and Betts Co., Unistrut Corp., or approved equal.

3.1 INSTALLATION:

No conduit shall any have more than three 90 degree bends in any one run. Pull boxes shall be provided as required or directed.

No wire shall be pulled until the conduit system is complete in all details.

The ends of all conduits shall be tightly plugged to exclude dust and moisture during construction.

Aluminum conduit threads shall be cleaned and coated with a grease metallic type conductive compound suitable for use on nonferrous conduits.

Conduit support shall be spaced at intervals of 8 ft. or less, adjacent to all couplings, and additionally as required to obtain rigid construction.

Conduit hangers shall be attached to structural steel by means of beam or channel clamps.

Bends in parallel conduit runs shall be concentric. All conduits shall be run perfectly straight and true.

Conduit terminating in knockouts shall have Meyers hubs.

Conduits shall be installed using threaded fittings and couplings.

Liquid Tight Flexible metal conduit shall be used for all motor terminations, not in wet wells, and other equipment where vibration is present. Flexible conduit length shall not exceed 1'-6" in length for this application.

RACEWAYS AND FITTINGS-16110 3

Liquid Tight Flexible metal conduit used for installing lighting fixtures shall not exceed 6' in length.

Where hazardous locations exist (as defined and classified by the National Electrical Code), all conduit, fittings and installation shall comply with Article 500 of the NEC. Conduits from wet wells shall have “seal offs” before entry into any control panel, junction box, etc and shall be schedule 80 rigid PVC.

Provide expansion coupling every 100 feet for long runs of conduit and at concrete expansion joints.

Provide ground bonding jumpers around expansion couplings, used on metallic conduit, sized according to Table 250-95 of the NEC.

Set top of underground conduits a minimum of 1'-6" below finish subgrade, minimum of 2’ under streets, highways, roads, driveways, parking lots, or as required for conditions defined by NEC, or as required per local codes. Service conduits shall be at minimum depth required by the serving electric utility company.

END OF SECTION 16110

WIRE AND CABLES -16120 1

SECTION 16120 – WIRE AND CABLES

PART 1- GENERAL

Furnish, install, and test all wire, cable, and appurtenances as shown on the Drawings and as hereinafter specified.

1.2 APPLICATIONS:

Wire for lighting and single power circuits shall be copper type THWN-2, 90 degree C temperature rating and suitable for wet environments.

Single conductor wire for control, indication and metering shall be type THWN-2, minimum No. 14 AWG, stranded copper.

Ground wires shall be Green and Neutrals shall be White or Gray. Green and White shall be used for these purposes only.

Color coding of all ungrounded service, feeder, and branch circuits conductors shall be required according to the following convention:

120/240 Volt, 1 phase: black and red

120/208 Volt, 3 phase: black, red, and blue

277/480 Volt, 3 phase: brown, orange, and yellow (gray neutral)

Parallel wire runs shall be run in separate conduits of the same material and as close as possible to the same length.

1.3 MINIMUM SIZES:

Except for control and signal leads, no wire smaller than No. 12 AWG shall be used.

PART 2- PRODUCTS

WIRE AND CABLES -16120 2

2.1 MATERIALS:

Wires and cables shall be of annealed, 98% conductivity, soft drawn copper unless indicated otherwise on the Drawings or in these Specifications.

All conductors No. 14 AWG and larger sizes shall be stranded.

2.2 600 VOLT WIRE:

Type THWN-2 shall be manufactured by Southwire, Okonite Co., or equal.

Multi-conductor control cable shall be stranded copper, 600 Volt polyvinyl chloride insulated and jacketed Type PNR as manufactured by Cerro Wire and Cable Co., General Electric, The Okonite Co., or equal.

2.3 WIRE GREATER THAN 600V:

NONE

2.4 INSTRUMENTATION CABLE:

Process instrumentation wire shall be twisted pair, 600 Volt, polyethylene insulated, copper tape shielded, polyvinyl chloride jacketed, manufactured by General Electric Co., Okonite Co., Belden Corp., or equal.

2.5 WIRE AND CABLE MARKERS:

Wire and cable markers shall be "Omni-Grip" as manufactured by W.H. Brady Co., or equal.

PART 3 - EXECUTION

3.1 INSTALLATION:

All conductors shall be carefully handled to avoid kinks or damage to insulation.

All wires, cables and each conductor of multi-conductor cables shall be uniquely identified at each end by color or with wire and cable markers. Lighting and receptacle wiring shall be distinctly differentiated and junction boxes marked.

Lubrications shall be used, if required, to facilitate wire pulling. Lubricants shall be U.L. approved for use with the insulation specified.

WIRE AND CABLES -16120 3

Shielded instrumentation wire shall be installed from terminal to terminal with no splicing at any intermediate point.

Shielding on instrumentation wire shall be grounded at the transmitter end only.

3.2 TESTS:

All 600 Volt wire insulation shall be tested with a "megger" after installation. Tests shall be made at not less than 500 Volts.

END OF SECTION 16120

LOW-VOLTAGE SWITCHBOARDS 16429 -1

SECTION 16429 – LOW-VOLTAGE SWITCHBOARDS

1.1 SCOPE AND RELATED DOCUMENTS:

Drawings and general provisions of the Contract. Where conflicts occur the more stringent requirement shall apply.

The Contractor shall furnish and install, where indicated, a free-standing, dead-front type low-voltage distribution switchboard, utilizing group mounted circuit protective devices as specified herein, and as shown on the contract drawings.

1.2 SECTION INCLUDES:

Low-voltage (600V and less) switchboards and associated accessories for distribution applications.

Overcurrent protective devices for switchboards.

1.3 REFERENCE STANDARDS:

NEMA PB 2 - Deadfront Distribution Switchboards; 2011.

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

UL 489 - Molded-Case Circuit Breakers, Molded-Case Switches and Circuit Breaker Enclosures;

Current Edition, Including All Revisions.

UL 891 - Switchboards; Current Edition, Including All Revisions.

UL 977 - Fused Power-Circuit Devices; Current Edition, Including All Revisions.

UL 1008 - Transfer Switch Equipment; Current Edition, Including All Revisions.

UL 1053 - Ground-Fault Sensing and Relaying Equipment; Current Edition, Including All Revisions.

UL 1066 - Low-Voltage AC and DC Power Circuit Breakers Used in Enclosures; Current Edition, Including All Revisions.

UL 1283 - Standard for Electromagnetic Interference Filters; Current Edition, Including All Revisions.

UL 1449 - Standard for Surge Protective Devices; Current Edition, Including All Revisions.

1.4 SUBMITTALS:

A. The following information shall be submitted to the Engineer for review:

1. Master drawing index

LOW-VOLTAGE SWITCHBOARDS 16429 -2

2. Front view elevation

3. Floor plan

4. Top view

5. Single line

6. Schematic diagram

7. Nameplate schedule

8. Component list

9. Conduit entry/exit locations

10. Assembly ratings including:

a. Short-circuit rating

b. Voltage

c. Continuous current

11. Major component ratings including:

a. Voltage

b. Continuous current

c. Interrupting ratings

12. Cable terminal sizes.

13. Key interlock scheme drawing and sequence of operations.

B. Submit copies of the following information for record purposes:

1. Final as-built drawings and information for items listed in section 1.4, A

2. Wiring diagrams

3. Certified production test reports

4. Installation information

5. Seismic certification and equipment anchorage details

2.1 GENERAL:

Switchboards shall be UL891 QED-2 by Schneider Electric or Eaton equivalent.

Switchboard Ratings/Configurations: As indicated on drawings. Front access only design shall be utilized where indicated.

Switchboards shall be suitable for the voltage, phase, ampacity, and short circuit rating as indicated on the drawings.

Enclosure rating shall be as indicated on the drawings. Nema 3R construction shall be utilized for outdoor locations unless otherwise noted.

2.2 CONSTRUCTION:

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Switchboard shall consist of the required number of vertical sections bolted together to form a rigid assembly. The sides and rear shall be covered with removable bolt-on covers. All edges of front covers or hinged front panels shall be formed. Provide adequate ventilation within the enclosure.

All sections of the switchboard shall be rear aligned with depth as shown on the drawings. All protective devices shall be group mounted. Devices shall be front removable and load connections front accessible enabling switchboard to be mounted against a wall. The enclosure shall have ON and OFF markings stamped into the cover.

The switchboard shall be UL listed.

Furnish isolation barriers where indicated and/or required.

For service entrance switchboards, furnish factory installed main bonding jumper between neutral and ground busses with removable neutral disconnecting link for testing purposes.

2.3 BUS:

A. All bus bars shall be silver-plated copper. Main horizontal bus bars shall be mounted with all three phases arranged in the same vertical plane. Bus sizing shall be based on NEMA current density of 1000A per square inch.

B. Provide a full capacity neutral bus where a neutral bus is indicated on the drawings.

C. A copper ground bus (minimum 1/4 x 2 inch) shall be furnished firmly secured to each vertical section structure and shall extend the entire length of the switchboard.

D. All hardware used on conductors shall be high-tensile strength and zinc-plated. All bus joints shall be provided with conical spring-type washers.

2.4 WIRING/TERMINATIONS:

A. Small wiring, necessary fuse blocks and terminal blocks within the switchboard shall be furnished as required. Control components mounted within the assembly, such as fuse blocks, relays, pushbuttons, switches, etc., shall be suitably marked for identification corresponding to appropriate designations on manufacturer's wiring diagrams.

B. Mechanical-type terminals shall be provided for all line and load terminations suitable for copper or aluminum cable rated for 75 degrees C of the size as indicated on the drawings.

C. Lugs shall be provided in the incoming line section for connection of the main grounding conductor. Additional lugs for connection of other grounding conductors shall be provided as indicated on the drawings.

LOW-VOLTAGE SWITCHBOARDS 16429 -4

D. All control wire shall be type SIS, bundled and secured with nylon ties. Insulated locking spade terminals shall be provided for all control connections, except where saddle type terminals are provided integral to a device. All current transformer secondary leads shall first be connected to conveniently accessible short-circuit terminal blocks before connecting to any other device. All groups of control wires leaving the switchboard shall be provided with terminals blocks with suitable numbering strips. Provide wire markers at each end of all control wiring.

2.5 OVERCURRENT PROTECTIVE DEVICES:

A. Main, tie, and feeder protective devices shall be circuit breakers with inverse time and instantaneous tripping characteristics and shall have ground fault protection where indicated or as required by NEC. Electronic trip circuit breakers shall be furnished where indicated on the plans or as specified herein.

B. Circuit breakers shall be operated by a toggle-type handle and shall have a quick-make/quick-break over-center switching mechanism that is mechanically trip-free.

Automatic tripping of the breaker shall be clearly indicated by the handle position. Contacts shall be non-welding silver alloy, and arc extinction shall be accomplished by means of DE- ION arc chutes. A push-to-trip button on the front of the circuit breaker shall provide a local manual means to exercise the trip mechanism.

C. Circuit breakers shall have a minimum symmetrical interrupting capacity as indicated on the drawings.

D. Circuit breakers less than 400 ampere frame shall be thermal-magnetic trip units and inverse time-current characteristics unless noted otherwise on the drawings.

E. Circuit breakers 400 ampere through 2000-ampere frame shall be microprocessor-based with RMS sensing trip units. Furnish fully adjustable trip unit functions as indicated on the drawings.

F. Furnish ERMS system that complies with NEC 240.87 as indicated on the drawings and for all circuit breakers 1200A or larger. ERMS system shall include a switch and indication that ERMS mode has been selected.

2.6 MISCELLANEOUS DEVICES:

A. Control power transformers with primary and secondary protection shall be provided, as indicated on the drawings, or as required for proper operation of the equipment.

B. Furnish integral surge protective devices (SPD) where indicated on the plans. Surge protective devices shall have internal fusing, surge counter, and LEDs to indicate status of

LOW-VOLTAGE SWITCHBOARDS 16429 -5

the SPD.

C. Engraved nameplates, mounted on the face of the assembly, shall be furnished for all main and feeder circuits as indicated on the drawings. Nameplates shall be laminated plastic, black characters on white background. Characters shall be 3/16-inch high, minimum.

Nameplates shall give item designation and circuit number as well as frame ampere size and appropriate trip rating. Furnish master nameplate giving switchboard designation, voltage ampere rating, short-circuit rating, manufacturer's name, general order number, and item number.

D. Control components mounted within the assembly, such as fuse blocks, relays, pushbuttons, switches, etc., shall be suitably marked for identification corresponding to appropriate designations on manufacturer's wiring diagrams.

2.7 CUSTOMER METERING:

A. When indicated on the Plans furnish customer meter(s) with all required accessories factory installed in the switchboard. Meters shall have enthernet communication provisions.

Current transformers shall be installed for each meter. Current transformers shall be wired to shorting-type terminal blocks.

Voltage transformers shall be provided with fuses for voltage inputs to meters.

2.8 FINISH:

A. All exterior and interior steel surfaces of the switchboard shall be properly cleaned and provided with a rust-inhibiting phosphatized coating. Color and finish of the switchboard shall be ANSI 61 light gray.

3.1 FACTORY TESTING:

A. The following standard factory tests shall be performed on the equipment provided under this section. All tests shall be in accordance with the latest version of ANSI and NEMA standards.

a. The switchboard shall be completely assembled, wired, adjusted, and tested at the factory. After assembly, the complete switchboard will be tested for operation under simulated service conditions to assure the accuracy of the wiring and the functioning of all equipment. The main circuits shall be given a dielectric test of 2200 volts for one (1) minute between live parts and ground, and between opposite polarities. The wiring and control circuits shall be given a dielectric test of 1500 volts for one (1)

LOW-VOLTAGE SWITCHBOARDS 16429 -6

minute between live parts and ground.

b. The manufacturer shall provide certified copies of factory test reports.

3.2 INSTALLATION:

A. The Contractor shall install all equipment per the manufacturer's instructions, Contract Documents, and National Electrical Code.

B. The assembly shall be provided with adequate lifting means and shall be capable of being moved into installation position and bolted directly to the floor without the use of floor sills provided the floor is level to 1/8 inch per 3-foot distance in any direction. All necessary hardware to secure the assembly in place shall be provided by the Contractor.

3.3 MANUFACTURER’S CERTIFICATION:

A. A certified test report of all standard production tests shall be available to the Engineer upon request.

END OF SECTION 16429

GROUNDING-16450 1

SECTION 16450 - GROUNDING

The work required under this section of the specifications consists of the installation of the complete grounding system for the project. Provide all materials required for the grounding system under this section of the specifications.

1.2 RELATED WORK:

Coordinate installation of grounding system with all work required under Division 16.

1.3 APPLICATION:

Equipment grounding conductors shall be used to establish grounding of the entire system.

Equipment grounding shall not be by metallic raceway alone.

Table 250-66 of the NEC shall be used to size all grounding electrode conductors.

Table 250-122 of the NEC shall be used to size equipment grounding conductors.

2.1 GROUND RODS:

Ground rods shall be 3/4" X 10', regular or sectional as required, unless indicated otherwise.

Construction shall be a solid steel core with a heavy uniform covering of electrolytic copper.

Threads, on sectional rods, shall be rolled (not cut) into the composite metal after the copper covering has been applied.

Copper covering shall be work hardened by drawing rods.

Sectional rod couplings shall be of a corrosion resistant alloy.

2.2 GROUNDING ELECTRODE CONDUCTOR CONNECTIONS:

Conductor connections shall be by UL approved exothermic weld.

GROUNDING-16450 2

2.3 EQUIPMENT GROUNDING CONDUCTORS:

Equipment grounding conductors shall be green with THWN-2 insulation (See Section 16120 - Wires and Cables).

3.1 INSTALLATION:

Ground all non-current carrying metal parts of the electrical system to provide a low impedance path for ground fault current.

The neutral conductor(s) of the incoming electrical service shall be grounded to the ground rod system, metal cold water piping system, and structural steel using Table 250-66 of the NEC for conductor sizing. Grounding conductors shall be run in rigid non-metallic conduit.

Bond generator frames, rebar in genset foundation, equipment racks to grounding system per the

NEC.

Ground the neutral of all dry type and liquid filled transformers to effectively grounded metal cold water piping system or grounding electrode as near as practicable using Table 250-66 of the NEC to size conductor.

Grounding conductors shall be attached to equipment with a bolt or sheet metal screw used for no other purpose. Use crimp on spade lugs for stranded conductors.

Ensure main bonding jumper is only installed at the service disconnect. Remove any existing main bonding jumpers installed downstream of the new proposed service disconnects to ensure there is only one neutral to ground bond and it is at the service disconnect.

Provide ground resistance testing indicating the resistance to ground, weather conditions on the day of the test, and testing equipment used.

END OF SECTION 16450