2-140P9721Q0047_OTHER-WRST-309504_Design_Narrative___Specifications.pdf

National Parks Service Microgrid Upgrades in Alaska Parks Kennicott (WRST), Alaska Contract No.: 140P2020Q0066 Order No.: 140P9720F0034 Plan Set No.:WRST 190 #173741

Final Construction Documents

For:

National Park Service 240 West 5th Avenue Anchorage, Alaska 99501

October 1, 2020

National Parks Service Microgrid Upgrades in Alaska Parks Kennicott (WRST), Alaska Contract No.: 140P2020Q0066 Order No.: 140P9720F0034 Plan Set No.:WRST 190 #173741

Final Construction Documents

Table of Contents Narrative Cost Estimate Specifications Catalog Cut Sheets Drawings

By:

Design Alaska, Inc.

601 College Road Fairbanks, Alaska 99701

October 1, 2020

NATIONAL PARK SERVICE

MICROGRID UPGRADES IN ALASKA PARKS

KENNICOTT (WRST), ALASKA

FINAL CONSTRUCTION DOCUMENTS

ELECTRICAL NARRATIVE

Design Alaska, Inc. Page 1 of 5

GENERAL

The Kennicott National Mine was originally built to extract rich copper ores from 1911 – 1938. The National Park Service now uses the Kennicott (aka Kennecott) site as a summer operations base within the Wrangell St. Elias National Park and Preserve as part of Alaska’s historic mining era and is an outstanding recreation area.

DESIGN CRITERIA

Authority Having Jurisdiction National Park Service

National Electric Code NFPA 70 ‐ 2020

EXISTING CONDITIONS

The existing power generation for the Kennicott facility is from an existing 40‐foot shipping container (connex) which has been subdivided into two sections separated by an interior door. This ‘generator module’ is the NPS site’s sole source of power as commercial power is not available otherwise. Each section has an exterior door or sets of doors used to enter the unit. One section of the enclosure includes a large 48 VDC bank of valve regulated batteries along with battery chargers, power conversion equipment, and other electronic systems used to produce power for the site. The other side includes a pair of 25 kW propane powered generators which produce power for use at the site where only one generator runs at a time and the other provides a redundant source if the main generator is needed to be serviced or is otherwise offline. The generator provides both prime power to the site and maintains charge of the storage batteries. During off‐hours, the generator is turned off (to maintain a quiet environment and preserve fuel) and the site power is fed from the stored power in the battery bank.

The battery bank feeds a set of three paired 10 kW inverters configured to produce 208Y/120 volt 3‐phase 4‐wire power. This power is then used to support the generator module along with a feeder to a 25 kVA step up 208‐volt to 480‐volt transformer for feeding the site power grid via MC‐HL type continuously armored cable. This/these cable(s) will be intercepted and utilized to power the site when this existing system is replaced.

The battery bank is approximately 9 years old and while they are still operational, this type of battery is typically replaced in the 8‐10 year maintenance cycle so these batteries are nearing the end of their useful life. The remainder of the equipment is older as well and the intent for the project will be to replace in entirety of these power generation systems and not salvage many of the existing components.

The generator portion of the module has a Kidde dry chemical type fire suppression system, which is connected to the site fire alarm system, along with heat detectors within this module.

KENNICOTT (WRST), ALASKA

FINAL CONSTRUCTION DOCUMENTS

ELECTRICAL NARRATIVE

Design Alaska, Inc. Page 2 of 5

DEMOLITION

Since the existing generator module powers the site, this module will need to remain in place for the duration of the construction of the new PV / Generator / Electrical module until the time when it will be commissioned and connected to the existing site feeders. After this occurs, the existing connex and all contained equipment not salvaged by the NPS will be shipped out by the contractor for disposal.

NEW WORK

The main work for this project is to provide PV panels to generate power for the site and substantially reduce the need to use propane fuel to power the site. The PV array will be configured to be relatively low profile and in four arrays set to be less visible from the main tourist areas as much as possible. Power from these PV panels will be connected with direct burial cables from the array site to the site of the new electrical equipment module for conversion into power for the site. This power will be sent to a new set of lithium type storage batteries with an overall capacity of about 74 kWh so these batteries can charge/discharge throughout the day to power the site. These lithium type batteries provide more stable power to the site and can accept higher rates of charge as compared to lead type batteries.

With the new batteries and solar conversion equipment, a new, or set of new, modules will be constructed to contain the electronics, batteries and standby generators. At this level of design, the design is to provide two, 20‐foot converted connex enclosures; one for the storage batteries and power conversion equipment, and the other for the standby generator. In this configuration, these two systems will be physically separated and can be configured in various arrangements as noted on the drawings.

To convert the DC power provided by the PV arrays, the system will need several electronic components.

In order to explain them they will be discussed in order of where they are within the system as related to the PV panels at the starting point. The next electrical equipment in the system are the solar charge controllers which take DC power from the PV arrays at a higher voltage and convert this power to charge the 48‐volt battery bank. These solar charge controllers also known as Maximum Power Point Tracking (MPPT) controllers and are units where internal electronics include advanced charging technologies to provide the maximum amount of power generated by the PV arrays. This PV generated power is converted to useful power for powering the site or maintaining charge of the battery bank. These are connected to a power distribution panel which has physical and electrical connections from the PV cables to the MPPT units to overcurrent protection devices. A set of separate disconnects will be needed to separate the power produced from the PV arrays from these units for servicing.

Once the PV power is converted for use in charging the battery bank (or otherwise converted to useful 48 VDC power), a set of inverters is needed to convert this DC power to AC for distribution to the site. While the site power is 480‐volt 3‐phase, and it was initially thought this could be by a direct conversion without a transformer, the available equipment for a system of this smaller size is not readily available where direct conversion to 480 volts are for much larger systems.

KENNICOTT (WRST), ALASKA

Design Alaska, Inc. Page 3 of 5

As such, the system will include a set of three inverters connected with a communications interface cable to produce 208‐volt 3‐phase power. Also, as these three inverters operate separately, they are not affected by system imbalances which was noted as an issue in the site investigation. The inverters are configured to provide baseline loads, but also can provide short term peak loads for intermittent starting currents (i.e. larger motors). This power will utilize a 30 kVA step up transformer to provide 480‐volt power for the site, similar to what is currently there now.

There will also be equipment to monitor the systems, provide data collection and communicate between the various components within the system. These components are shown on the design drawings.

Where the PV panels are not able to collect sufficient energy to power the site and keep the batteries charged, a generator automatic starting system is needed. This component will monitor the status of the battery loads and determine when the generator needs to start and stop so the generator is only operated when needed to conserve fuel.

A single standby, propane‐powered, 25 kW, generator will also be proposed and included within the design. With generators becoming more popular, the selection of the generator will be one with an enclosure even though this unit will be contained within a 20‐foot module. Since these generators are intended to be used in residential areas, these enclosures offer significant sound reductions and when they are installed within the other module, will be even more quiet to this remote environment. Note, the arrays of PV panels will become the primary source of power for the site, while the standby generator will act as a backup system, thus only one generator unit will be installed in the enclosure. While these systems will be designed to provide reliable power to the site, an additional portable standby generator configured to provide 208‐volt 3‐phase power will also be included within this submittal as there is not likely another generator which is configured for this type of voltage available at Kennicott. While this portable unit may not be needed, it will provide a means for powering the site if something happens to the main generator or it needs to be taken offline for servicing. A transfer switch will be included in the design so in the event this is needed, maintenance can connect the portable generator to the system and maintain power to the site. This portable generator will not however be integrated into the microgrid systems and will require the NPS staff to run the generator to charge the batteries manually.

Preliminary studies of the solar energy collected compared to the energy usage show the PV array and storage battery system will be able to meet the load demands for the early part of the season, but as the solar angles decrease later in the season and more clouds are present, the PV’s alone will not be able to meet the demand.

Additional support systems will be included within these new modules to include power, lighting, ventilation and general‐purpose receptacles. Within each module, a panelboard will be provided to support the electrical systems within the specific module. These modules will have new LED lighting set to provide 20+ average foot‐candles of illumination within the modules. A representation of the lighting calculations is shown below in Figure 1.

KENNICOTT (WRST), ALASKA

Design Alaska, Inc. Page 4 of 5

Figure 1 ‐ Module Interior Lighting Calculations

As there will also be a new wall mounted exterior motion sensor light at the entry to these enclosures, the lighting for these lights were evaluated. These motion sensing lights will only turn on during dark hours and calculations for this area are shown in Figure 2.

Figure 2 – Module Exterior Motion Sensing Lighting Calculations

Each module will also be provided with ventilation systems. In the generator module, when the generator starts, there will be a 120V signal to a set of motor operated dampers capable of opening so the intake and exhaust dampers open to allow the generator fan to move air through the module. For the electrical module, since there is no driving force, there will also be motor operated dampers along with an exhaust fan and line voltage thermostat so when the temperature inside of the enclosure exceeds 75 degrees, the dampers open and the exhaust fan runs to remove heat from the module. As both modules are only seasonally operated in summer months, there are no permanent provisions for heating the enclosures.

KENNICOTT (WRST), ALASKA

Design Alaska, Inc. Page 5 of 5

Also included within the modules will be a clean agent fire suppression system so in the event of a fire, this system will deploy and extinguish the fire. Prior to deployment of this system, all dampers will be commanded to be closed and the generator and exhaust fans would be turned off so the clean agent will be maintained within the enclosure. The clean agent system will not require cleaning of the enclosure which is different than the current dry chemical system which would be quite messy were the system to be deployed.

ANTICIPATED POWER PRODUCTION AND GENERATOR RUN DAYS

Additional analysis of anticipated power production usage averages by the PV array and power usage from the Kennicott site was conducted to determine how many times the generator would need to run. The generator would need to run on days where the sun is blocked by clouds or when power demands exceed the ability of the PV array to meet the site loads. Note in the right axis of Figure 3 where a designation of ‘1’ indicates the generator will need to run (up to 4 hours) which will fully charge the battery bank. There are also trendlines for each of the data sets to show averages which are easier to interpret than the highly variable data for each of the production/usage plotted.

Figure 3 – Seasonal Power Production and Usage Chart

G en er at or R u n kW h

Average NPS Kennicott Power Usage vs. PV Array Power Production

Daily Energy Output to NPS (kWh) Daily Energy Input from PV Array (kWh)

Generator Run Trendline Power Usage (kWh) Trendline PV Input (kWh)

Specifications

KENNICOTT, ALASKA

SPECIFICATION INDEX

Design Alaska, Inc. Index‐ 1

DIVISION 21 FIRE SUPPRESSION

21 22 00 Clean Agent Fire Extinguishing System

DIVISION 26 ELECTRICAL

26 05 00 Common Work Results for Electrical 26 32 13 Fuel Gas Engine‐Driven Generation Set

DIVISION 48 ELECTRICAL POWER GENERATION

48 14 00 Solar Energy Electrical Power Generation & Storage Equipment

KENNICOTT, ALASKA

SECTION 21 22 00

CLEAN AGENT FIRE EXTINGUISHING

SYSTEM

Design Alaska, Inc. 21 22 00‐ 1

PART 1 GENERAL

1.1 SCOPE: SECTION 21 22 00 ‐ CLEAN AGENT FIRE EXTINGUISHING SYSTEM

A. This Section covers design, selection, installation, and testing of materials and equipment making up the clean agent fire suppression systems for this Project.

B. Clean agent may be of the types listed below. Any of which will be referred to as ‘clean agent’ within the remainder of this specification.

1. FM 200 ‐ (HFC‐227ea) CF3CHFCF3

2. NOVEC 1230 ‐ (Sapphire) CF3CF2C(o)CF(CF3)2

3. Ecaro 25 ‐ (Dupont FE‐25) CHF2CF3

1.2 SUBMITTALS

A. Manufacturer's Data:

1. Catalog cuts and selections of component parts and accessories.

B. Contractor Qualifications:

1. Name and address of fire suppression contractor.

2. Proof of Alaskan Office, with full‐time service representative.

3. Fire suppression contractor’s certificates, qualifications, and experience in installation of clean agent type fire suppression systems of comparable size to those associated with this project.

4. List of Alaskan buildings with names, addresses, and telephone numbers of Owners, which are representative of clean agent fire suppression systems that have been installed by the Contractor. Include a brief description and approximate system construction cost of each system submitted.

5. Name and qualifications of fire equipment manufacturer's authorized engineer proposed for system testing.

C. Shop Drawings and Calculations:

1. Shop Drawings to include routing of all piping, location of all equipment, and system electrical schematic diagrams including a description of all interior functions.

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SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 2

2. Calculations shall include all information required to clearly show that the submitted system will meet the concentration and time duration requirements of these specifications.

3. Prior to starting installation of the clean agent suppression system the Shop Drawings and flow calculations shall be:

a. Reviewed and accepted by the Contracting Officer.

D. Contractor shall provide one printed set of Operations and Maintenance Manual(s) and an electronic copy on a USB type flash drive enclosed within the O&M binder.

1.3 QUALITY ASSURANCE

A. Acceptable Manufacturers:

1. Fike Corporation.

2. Kidde Fire Systems.

3. Chemetron Fire Systems.

B. All system components to be listed by Underwriter's Laboratories and approved by Factory Mutual.

C. All design and installation shall be performed in accordance with the requirements of NFPA Standard 2001, Clean Agent Fire Extinguishing Systems, NFPA 70, National Electrical Code; and NFPA 72.

D. Clean agent fire suppression system shall be furnished and installed by a contractor who is regularly engaged in the installation of these types of systems in Alaska. The Contractor shall maintain an office in Fairbanks or Anchorage with parts and maintenance personnel to ensure prompt response (24 hour maximum) to emergency calls.

E. The Contractor shall be able to demonstrate that they have had experience designing and installing clean agent fire suppression systems of comparable type and size to that called for in these Specifications.

1.4 SYSTEM DESIGN

A. The clean agent fire suppression system shall be of the engineered, piped, fixed‐nozzle type.

B. The system shall allow separate, independent discharge into each of the protected areas.

Protected areas to be shown on the contract drawings.

KENNICOTT, ALASKA

SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 3

C. Each extinguishing system shall provide high‐speed release of clean agent based on the concept of total flooding fire protection for enclosed areas. A uniform extinguishing concentration by volume of 7 percent at 70 degrees F shall be created within the enclosure by rapid release of a predetermined amount of clean agent. There shall be no reduction for volume of room contents. Specified concentration shall be achieved within 10 seconds of system activation.

D. Each extinguishing sub‐system shall have an associated reserve sub‐system of equal capacity. Both primary and reserve system shall be permanently connected to the piping and shall be arranged for easy changeover.

E. Design concentration shall be based upon shutting down the ventilation and air ventilation/cooling system at the time of first zone detection. Soaking times of 10 minutes for each hazard area shall be required; that is, the areas shall be properly sealed such that the specified agent concentrations will be maintained in the hazard areas for a minimum of ten minutes after initial clean agent discharge.

F. Upon operation and clean agent discharge shall be activated through an adjustable time delay device (0 to 45 seconds).

G. Equipment which is located within the space shall be shut down, and louvers connected to the adjacent spaces shall close within the hazard area clean agent the deploys within and the associated horns strobe shall be activated.

H. Deployment of clean agent system shall be reported to campus wide fire alarm system.

I. Manual discharge stations located near each exit from the protected space shall cause system to respond as if two detectors had been activated except that manual stations shall override abort switches and time delay lockout used with automatic discharge.

J. Abort stations shall be located next to manual pull stations near each exit. Abort station, when depressed, shall prevent clean agent discharge. When abort station is released, the clean agent release time delay relay shall reset to zero and start retiming if two detectors are energized.

PART 2 PRODUCTS

2.1 PIPING AND FITTINGS

A. Pipe provided for clean agent system shall be Schedule 40 galvanized steel.

B. Fittings shall be galvanized malleable or ductile iron, 300‐pound class.

KENNICOTT, ALASKA

SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 4

2.2 MANUAL PULL STATIONS WITH DIGITAL COUNTDOWN TIMER

A. General Description: A manual release shall also consist of a digital countdown timer and abort switch combined as one unit.

B. Manual Release: "AGENT RELEASE" caption, and red finish. Unit shall have a metal housing with a dual action release configuration to prevent accidental system discharge.

C. Abort Switch: "ABORT" caption, momentary contact, with yellow button.

D. Countdown Timer: The countdown timer provides a digital readout, indicating the number of seconds remaining until the clean agent discharges. There shall be a label stating "Seconds Remaining to Discharge" at the digital readout.

2.3 DISCHARGE NOZZLES

A. Shall be fabricated of corrosion resistant materials and finished with a protective coating.

B. Shall be permanently marked to identify the manufacturer and part number.

C. Only 360‐inch type discharge nozzles shall be used in occupied areas. The discharge pattern and velocities shall minimize the possibility of personnel being struck by the discharging clean agent.

2.4 IONIZATION SMOKE DETECTORS

A. The detectors shall be a dual chamber plug‐in unit that mounts to a twist/lock base.

B. The detectors shall operate on a two‐wire circuit and shall contain an alarm indicating LED which will illuminate to signal actuation of detector.

C. Monitoring of detector sensitivity shall be possible without removal of detector head from its base. Measurement of detector sensitivity shall provide a discrete electrical valve.

Testing shall provide an output signal proportional to smoke concentration. Furnish one detector sensitivity meter to Owner at time of instruction of Owner personnel.

D. The base assembly into which the detector is installed shall be of twist/lock design with screw clamp terminals. The base shall utilize self‐wiping contacts for reliability and shall be directly interchangeable with other compatible plug‐in detectors.

E. Detectors mounted in occupied spaces shall have field adjustable sensitivity.

KENNICOTT, ALASKA

SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 5

2.5 CYLINDERS

A. Cylinders (where required as part of the pressurization of the clean agent system) shall be constructed of high strength alloy steel, conforming to all applicable specifications of the Department of transportation.

B. Cylinder design shall permit on‐site reconditioning and/or refilling when required.

C. Cylinders shall be super pressurized with dry nitrogen to a total pressure of 360 PSIG at 70 degrees F.

D. Cylinders larger than 60 pounds, capacity shall be fitted with lifting lugs.

E. Cylinders shall be furnished with bracketing suitable for secure mounting.

F. In multiple cylinder installations, the first cylinder and every tenth cylinder thereafter shall be a master cylinder.

G. Each cylinder shall be distinctly and permanently marked with the type and quantity of agent contained therein, together with degree of super pressurization.

H. Cylinders shall be fitted with pressure switches to signal control panel on loss of pressure.

I. Cylinders shall be connected to manifold with flex discharge bends. Flexes for 125 pounds, and larger flexes shall be minimum 36 inches long and flexes for smaller bottles shall be minimum 22 inches long.

2.6 STROBE HORN

A. Strobe horns shall be 24 volt DC diode polarized strobe horn with AGENT or similar caption imprinted on strobe light visible from all angles.

2.7 ALARM BELL

A. Alarm bells shall be 24 volt DC 6‐inch vibrating bell and to include a weather proof back box and be suitable for exterior installation.

2.8 CYLINDER VALVES

A. Cylinder valves shall have brass body and shall be of pressure seated high flow design and shall be fitted with a pressure gauge and an anti‐recoil plug.

B. Cylinder valves shall automatically relieve excessive pressure build‐up.

C. Cylinder valves on master cylinders shall provide for electrical actuation with an electric solenoid valve and local manual actuation.

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SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 6

D. The electric solenoid valve shall be fitted with an easily removable, flexible electrical connector to facilitate cylinder removal and servicing.

2.9 INSTRUCTION PLATES AND SIGNAGE

A. Contractor shall provide engraved instruction plates detailing emergency procedures at each system control panel and at each hazard area manual discharge station/abort switch location. Permanent nameplates shall be used in the control panel to identify control logic units, contacts, and major circuits. Nameplates shall be the manufacturer's standard or shall be engraved on laminated plastic.

2.10 CONTROL PANEL

A. Control panel and its components shall be UL listed and/or Factory Mutual Global (FMG) approved type.

B. The clean agent Fire suppression system for each protected area shall be controlled by a separate control panel.

C. Panel shall be listed for clean agent releasing device service in accordance with NFPA Standards 12 and 12B.

D. Panel shall have integral standby power with built‐in charger supplied by a set of 24‐volt rechargeable lead‐acid or nickel‐cadmium batteries rated for 24‐hour continuous standby duty and minimum of 5 minutes of alarm duty. Include automatic battery charger, with varying charging rate between trickle and high depending on battery voltage that is capable of maintaining batteries fully charged.

E. The control‐panel shall include the following features:

1. Electrical contacts for shutting down fans, activating dampers, and operating system electrical devices.

2. Automatic switchover to standby power at loss of primary power.

3. Storage container, low‐pressure indicator.

4. Service disconnect to interrupt system operation for maintenance with visual status indication on the control panel.

2.11 AREA CONTAINMENT DAMPERS

A. Area Containment Dampers shall be of the fast activation type with electric operators.

Where electrical power to the damper actuator is interrupted, the damper shall fail closed by spring actions.

KENNICOTT, ALASKA

SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 7

PART 3 EXECUTION

3.1 INSTALLATION

A. Pipe to be reamed, blown clear, and thoroughly cleaned with appropriate solvent to remove all mill scale, rust, grease, varnish, and cutting oil before assembly.

B. Welding of galvanized pipe is not permitted.

C. All piping shall be supported and restrained as required for sprinkler system piping in

NFPA 13.

D. Cylinders, control unit, and annunciator panel shall be located where indicated and shall be mounted in a rack with a weigh bar.

E. All ceiling tiles within a 10‐foot radius of discharge nozzle shall be secured with hold down clips.

F. A minimum of two detectors shall be installed in each space.

G. Clean agent containment dampers shall be installed where indicated and where required to close off protected area boundaries prior to clean agent discharge.

3.2 CONNECTIONS

A. Install control panels, detection system components, alarms, and accessories, complying with requirements of NFPA 2001, Section "Detection, Actuation, and Control Systems", as required for supervised system application.

B. Install piping adjacent to extinguishing‐agent containers to allow service and maintenance.

C. Connect electrical devices to control panel and for interfacing to campus wide fire alarm system.

3.3 LABELING AND SIGNAGE

A. Provide as required per NFPA.

3.4 DISTRIBUTION PIPING TESTING

A. Air test at 50 PSIG for one hour with no noticeable pressure drop on air leaks. Test all lines prior to concealing.

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SECTION 21 22 00

Design Alaska, Inc. 21 22 00‐ 8

3.5 ACCEPTANCE TEST

A. Upon completion of the clean agent system installation, the Contractor shall have the fire equipment manufacturer's authorized engineer perform full operation test of the system in the presence of a representative of the Fire Chief's office. The test shall encompass all aspects of the system operation. Portions of the test that are unsatisfactory shall require corrective action and rescheduling of full operation test by the factory authorized engineer. Each installed fire detection device shall be tested and adjusted for proper alarm operation in accordance with the manufacturer's instructions. The control unit(s) shall be checked for proper responses to activation of detected units.

3.6 TRAINING

A. Provide minimum of 2 hours of classroom / hands on training to NPS Maintenance personnel.

END OF SECTION

KENNICOTT, ALASKA

SECTION 26 05 00

COMMON WORK RESULTS FOR

ELECTRICAL

Design Alaska, Inc. 26 05 00‐ 1

1.1 SCOPE: SECTION 26 05 00 ‐ COMMON WORK RESULTS FOR ELECTRICAL

A. This Section covers general electrical requirements for Work covered under this Division.

B. All Work and Services specifically covered under this Division is supplementary to that covered under other Divisions of these Contract Documents. The requirements of this Division, which are more stringent than that covered under other parts of these Contract Documents, apply to Work covered under this Division.

C. All incidental Work required but not specified under this Division shall comply with the Division in which it is specified.

D. Review the Drawings and Specifications of all other Divisions for additional Work under Division 26.

1.2 DRAWINGS

A. Unless otherwise indicated, drawing symbols conform to the applicable standards of ANSI. The Drawings (or Contract Drawings) rely heavily upon symbolic representation of the features shown, and represent exact details only so far as indicated. The following should also be kept in mind:

1. The Drawings are, to some extent, diagrammatic and are not intended to show exact details.

2. Dimensions scaled from the Drawings may vary due to tracing tolerances, printing distortion, field conditions, field changes, and other factors. For these reasons, it shall be the Contractor's responsibility to field‐verify dimensions that pertain to his work. The Contractor shall make minor relocations where necessary to resolve conflicts or present a uniform appearance. The Drawings show exact location of electrical features only where specifically dimensioned.

3. The Electrical Contractor shall review the Contract Documents of the other trades on the Project, and shall coordinate the installation of electrical features with the work of all other trades. In areas such as mechanical rooms where conflicts are likely with structural, mechanical, or other features, the electrical installation shall be performed after the other trades, and arranged to eliminate conflicts.

KENNICOTT, ALASKA

SECTION 26 05 00

Design Alaska, Inc. 26 05 00‐ 2

4. The Drawings and Specifications are complementary to each other and what is called for by one shall be as binding as if called for by all. Discrepancies between any combination of Drawings, specification, and/or field conditions shall be promptly brought to the attention of the Government for a decision. Failure to obtain such decision before proceeding shall automatically leave the Contractor liable for all expenses necessary to correct the situation to the satisfaction of the Government.

5. Provide fixtures, devices, equipment, conduit, conductors and accessories indicated on the drawings unless it is specifically indicated that the fixture, device, equipment, conduit, conductor, or accessory is existing.

1.3 GENERAL REQUIREMENTS

A. Provide all work as shown on the Drawings and in these Specifications for a complete, safe, and functional installation.

B. The Contractor is responsible for providing a complete and operating facility. The intention of the Contract Documents is to include all labor and materials, equipment, and transportation necessary or reasonably inferable as being necessary for the execution of the work. Where minor adjustments of the work are necessary for purposes of fabrication or installation of items or resolution of conflicts between items within the intent of the Contract Documents, the Contractor shall make such adjustments at no added expense to the Government. Where such adjustments affect functional or aesthetic design of the work, they shall first be submitted to the Government’s Representative for review and approval.

C. Unless otherwise noted, all materials shall be of new manufacture and installed before expiration of their shelf life, if applicable.

D. Materials and equipment are to be those of major and reputable manufacturers with ability to render competent and thorough service through local and regional organizations capable of expeditiously providing service, parts, and assistance.

E. Materials of similar nature, style, function, purpose and/or appearance shall be like products from the standard product line of the same manufacturer.

F. All products shall be listed and labeled by an approved national testing laboratory for their intended use and location in all cases where such products are listed and labeled.

G. The omission of express reference to any parts, supplies, services, or facilities necessary for, or incidental to, a complete installation shall not be construed as a release from furnishing such items at no additional cost to the Government.

H. Any deviations from the installation shown in these Contract Documents, due to a particular manufacturer's requirements, shall be made without additional cost to the Government.

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SECTION 26 05 00

Design Alaska, Inc. 26 05 00‐ 3

I. Verification is required of all equipment sizes and locations prior to the ordering or installation of connection materials and disconnecting equipment to ensure that the power connections are of the proper size and type, and in the proper location. Verify all electrical loads (voltage, phase, full load amperes, number and point of connections, minimum circuit ampacity, etc.) for equipment furnished under all divisions of this specification, by reviewing respective shop drawings furnished under each division. Meet with each subcontractor furnishing equipment requiring electrical service and review electrical characteristics. Report any variances from electrical characteristics noted on the drawings with the Government before proceeding with rough work. Obtain and review the equipment shop drawings to determine final connection requirements before rough‐ in begins for each equipment item.

J. All materials shall be installed in a neat, orderly, and secure fashion, as required by these specifications and commonly recognized standards of good workmanship. The norms for execution of the work shall be in conformity with NEC Chapter 3 and the National Electrical Contractors’ Association “National Electrical Installation Standards”, for which the Government's judgment shall be final.

K. Electrical equipment shall be installed in spaces that are accessible and in a manner that allows for maintenance and replacement. Entries into spaces shall allow for the passage of equipment. Coordinate the final locations with piping, ducts and equipment of other trades to insure proper access for all trades. Coordinate location of concealed equipment, disconnects and boxes with access panels and doors.

1.4 REPAIR OF EXISTING FEATURES

A. Where existing or previously‐completed building surfaces or other features must be cut, penetrated, or otherwise altered for the installation of electrical features, such work shall be carefully laid out and performed, and any subsequent patching or repairs that it necessitates shall be performed by skilled mechanics of the trades involved, at no additional cost to the Government.

1.5 WORK INCIDENTAL TO SUBSTITUTIONS

A. When substitutions for specified Methods or materials alter the relationship between the Work actually required and that called for by the Contract Documents, the Contractor shall bear responsibility for all expenses incurred by any necessary revisions, including the Work of other trades.

1.6 REMOVAL OF ELECTRICAL WORK IN EXISTING FACILITIES

A. Where connected to or serving fixtures or equipment being removed, or incidental to the required removal of walls, ceilings, or other features, existing electrical features shall be removed as follows:

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SECTION 26 05 00

Design Alaska, Inc. 26 05 00‐ 4

1. All abandoned wiring shall be removed back to its source of supply.

2. Exposed items shall be removed in their entirety.

a. All abandoned exposed conduit, including all abandoned conduit above accessible ceiling finishes shall be removed back to the source of supply, or back to the connection to a still active branch. Cap and properly close all openings in remaining conduits, boxes and enclosures.

3. Concealed items may be abandoned in place if they are completely concealed by the existing construction.

a. Conduits concealed in areas not accessible or that are not being made accessible shall be removed into areas of non‐accessibility. Patch to match existing, openings in walls, ceilings, or floors left or created as a result of conduit removal.

b. Conduits that are being removed and that extend below slab on grade shall be ground flush with the top of the slab, plugged with concrete, and the slab patched to match existing.

4. Where other electrical items are fed through, supported by or attached to a removed item, reroute raceways and/or cut back building surfaces as necessary to rejoin raceways, provide new conductors as necessary, and patch and finish all damaged construction to match surrounding surfaces.

5. Salvage or disposal of removed items shall be as noted on the drawings, or as directed by the Government.

B. All existing equipment left remaining shall be maintained in service. When encountered in work, whether shown on the drawings or not, protect, brace and support existing items.

If existing active electrical services are encountered that require relocation in order to execute general, electrical or mechanical work, relocate services as required and as directed without additional cost to the Government. Any equipment which is not specifically indicated for removal or is not shown or noted shall remain in service.

1.7 ELECTRICAL WORK EXPOSED TO WEATHER

A. Provide corrosion protection for all ferrous metal portions of electrical work items exposed to weather including conduit, clamps, supports, disconnect switches and other items.

B. All ferrous metal shall be hot‐dip galvanized after fabrication, painted or cadmium plated, or similarly protected against corrosion. Approval of painting material and methods is required.

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C. All enclosures and equipment shall be weathertight and shall be NEMA rated for the environment.

D. Arrange all equipment in such a fashion as to prevent a buildup of water or other weather related issues that may result in premature failure of the device, damage of materials or other potential public safety hazards.

1.8 PROTECTION AND CLEANING

A. All electrical equipment shall, during the entire duration of construction work, be protected against water, dust, debris, overspray or any other contamination, whether environmental in origin or as a result of construction work.

B. All construction dust, debris, overspray, scrap and surplus materials, etc., resulting from this Work shall be cleared away, leaving the installation in completely clean condition.

C. Clean up all equipment to factory condition. Use touch‐up paint where required. All cleaning shall be in accordance with the manufacturer’s recommendations.

D. These cleaning requirements apply not only to exterior surfaces, but also interiors of accessible enclosures. In particular, the interiors of equipment having contacts or heat dissipating components shall be thoroughly vacuum‐cleaned prior to energizing.

1.9 SERVICE INTERRUPTIONS

A. All Work covered by this Contract shall be performed on de‐energized circuits. Where such de‐energization would deprive the Government of existing service, the Contractor shall give at least 24 hours advance notice of the outage, or more if the Government requires. The Contractor will not necessarily be entitled to any extra compensation or time extension for the Government’s inability to grant an outage at a time convenient to the Contractor.

PART 2 PRODUCTS

2.1 CONDUCTORS AND CABLES

A. All conductors shall be copper, except as otherwise noted. Conductors No. 10 AWG and smaller shall be stranded or solid. Conductors No. 8 AWG or larger shall be stranded.

B. Branch circuit conductors shall be 600 volt insulated, and unless otherwise noted on the drawings, shall have the following types:

1. Dry Applications ‐ Type NM‐B.

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2. Wet Applications ‐ Type UF‐B.

C. PV Cables to be included with specification 48 14 00.

D. Cables for direct burial shall be of the MC‐HL type with continuous interlocked armor and UV stabilized polyethylene jacked also rated for sunlight exposure. Cables to be manufactured by Okonite type CLX or equal.

1. Cable terminations to be specified and listed for the provided cable.

2.2 OUTLET BOXES

A. Manufacturers

1. Boxes shall be the products of Raco, Steel City, Appleton, Crouse‐Hinds, or equal.

B. Types and Sizes

1. Boxes shall be deep‐type (2‐1/8 inches nominal) unless space limitations or drawing notes require shallower boxes. Boxes shall be as follows:

a. Fixture outlet boxes for use with concealed raceway systems shall be 4 inches octagonal or square, galvanized sheet steel.

b. Boxes for wall‐mounted devices with concealed raceways shall be galvanized sheet steel, 4 inches square for up to two devices, and solid ganged boxes for more than two devices.

c. Ceiling‐mounted boxes for use with exposed raceways shall be galvanized sheet steel.

d. Cast boxes with threaded hubs, external mounting brackets or holes, and gasketed covers shall be used in the following locations:

1) Exterior locations.

2) Wet or Damp locations.

3) Electrical and generator enclosures, etc., where subject to physical damage.

e. Exposed exterior locations below 8 feet above finished grade, for use with exposed raceway systems, shall be of the threaded‐hub cast metal type, with matching cover suitable for the device being installed.

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2.3 LIGHTING

A. Provide LED type light fixtures per the basis of design type as shown on the drawings.

Fixture selection may differ as long as the lumen output and other provisions are similar.

2.4 WIRING DEVICES AND PLATES

A. Light Switches

1. Light switches shall be:

a. Premium specification grade, AC quiet type, with screw terminals.

b. Rated 20 amperes at 120 volts for 120‐volt circuits.

c. Switch handles shall be white, except where pilot‐light switches are called for, in which case they shall have a LED lamp mounted in a translucent red handle.

d. Pilot light switches shall be LED lamp type mounted in the handle (lighted handle), “on” when switch is “on”, rated for the voltage of the wiring system.

B. Receptacles

1. Duplex receptacles shall be Commercial Specification grade, nylon faced, white‐ color, self‐grounding, 120‐volt, 20 amp, 3‐wire, NEMA 5‐20R configuration, tamper resistant with screw terminals.

2. Special purpose receptacles shall be Specification grade, with the NEMA configuration noted on the drawings.

3. Weatherproof covers shall have a full width hinged cover suitable for receptacles installed in wet locations to maintain the integrity of the receptacle when the attachment plug is inserted. Covers shall be constructed of die cast aluminum, for duplex receptacles, drilled for four screw holes for horizontal.

4. GFI receptacles shall be of NEMA 5‐20R configuration, tamper resistant, for single‐strap mounting, with "test" and "reset" buttons accessible from front.

Indicator light shall provide visual notification when device has tripped. Ground fault trip level shall be 4‐6mA, and the trip circuitry shall be essentially immune to nuisance tripping due to spurious influences such as RF noise. Feedthrough terminals shall be provided for protection of downstream outlets.

C. Plates

1. Cover plates for all outlets shall be metal stamped steel suitable for the back box.

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D. Terminals

1. Wiring devices shall have binding‐screw type terminals only. Terminals using spring pressure to secure the wire and make electrical contact are not permitted.

2.5 GROUNDING

A. Conductors

1. All grounding conductors and bonding jumpers shall be copper (absolutely no aluminum substitution permitted), sized according to the NEC. Where separate equipment grounding conductors are called for, they shall be green insulated where run with branch circuits and feeders.

B. Ground Rods

1. Ground rods shall be 3/4‐inch by 10 feet‐0 inches, except where longer rods are called for on the Drawings, in which case they shall be 3/4‐inch diameter sectional type, length as indicated. All ground rods shall be copper‐coated steel, "Copperweld" or equal.

C. Hardware

1. Clamps, lugs, connectors, bonding bushings, and all other such grounding and bonding hardware shall be approved for the purpose; shall be made of hot‐dip galvanized steel, or bronze or other corrosion‐resistant alloy. Acceptable manufacturers include, but are not limited to, the following: O.Z. Gedney, T & B, Erico, or any other manufacturer meeting the requirements of the contract documents. No split bolt connectors allowed.

D. Buried or Embedded Grounding Connections

1. All buried or embedded grounding connections shall be made only by means of exothermic welds, copper "Ampact" taps, or irreversible hydraulically‐crimped fittings specifically designed for the purpose.

2.6 BRANCH CIRCUIT PANELBOARDS

A. Acceptable Manufacturers

1. Acceptable manufacturers for branch circuit panelboards shall be Square D, Cutler‐Hammer, Siemens, or equal.

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B. Panelboard Features

1. Branch panelboards shall be of the bolt‐on circuit breaker type, with the following features:

a. Surface mounted, as shown on the Drawings and shall be furnished with the factory standard paint finish.

b. Panelboard fronts shall not contain any visible screws or other fasteners.

Fasteners which are designed to be wedged in place by sliding sideways with a screwdriver are specifically prohibited. Fronts shall have a lip or bracket which rests on the bottom return flange of the panel enclosure, to permit the front to be held in place with one hand while fastening.

Each front shall have a hinged door with a locking latch, furnished with two keys. All locks shall be keyed alike.

c. Panelboards shall have main lugs only, unless a main circuit breaker, through‐feed lugs, or subfeed lugs are noted. Lugs shall be sized to accommodate the feeder conductors shown on the Drawings.

d. Current rating of the main buses shall be as noted on the Drawings.

Where a main circuit breaker size does not correspond to a factory standard bus size, the next larger standard size main buses shall be used.

All bus components shall be braced to withstand fault currents of the peak magnitude corresponding to the branch circuit breaker interrupting ratings shown on the Drawings. Panelboards shall be bussed full height (including bus fingers and related hardware), to allow all available branch circuit spaces to be used.

e. Cabinets shall be nominally 20 inches wide, 5‐3/4 inches deep.

f. An adequate ground bus shall be provided for all branch circuit equipment grounding conductors shown on the drawings, plus 20 percent spare.

C. Branch Circuit Breakers

1. Panelboards shall be furnished with bolt‐on branch circuit breakers conforming in the quantity, size, number of poles, and interrupting ratings shown on the panel schedule(s). Branch circuit breakers shall be installed in the exact circuit positions shown on the panel schedule(s), unless otherwise accepted by the Government.

2. Where GFI breakers are called for, they shall have a ground fault current trip level of 5mA (or 30 mA for dedicated heating cables), a "test" button on the front, and trip circuitry essentially immune to nuisance tripping due to spurious influences such as RF noise.

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2.7 OVERCURRENT PROTECTIVE DEVICES

A. Circuit Breakers

1. Unless otherwise noted, circuit breakers shall be of the molded‐case thermal‐ magnetic type, with the following features:

a. Size, number of poles, and interrupting capacity as shown on the drawings. Ampere ratings shall be clearly visible, even when the breaker is installed in its appropriate enclosure.

b. Voltage rating to suit the voltage of the system on which they are used.

c. Each breaker pole shall provide both instantaneous and inverse‐time tripping, with tripping clearly indicated, and a common‐tripping tie to any other poles in the same breaker. Handle‐ties are not acceptable for this purpose.

d. Breakers shall be operated by a toggle handle and shall have a quick‐ make, quick‐break, overcenter switching mechanism that includes a trip‐ free feature so that the contacts cannot be held closed against tripping currents.

e. Circuit breakers shall be labeled or listed by an independent testing laboratory, and shall conform to the latest NEMA Standards and the short‐circuit test parameters of NEMA Publication AB 1.

B. GFCI Circuit Breakers

1. GFCI circuit breakers shall be thermal‐magnetic circuit breakers as previously specified herein, but shall also have a ground‐fault current trip mechanism operating at a current level of 5mA. GFCI circuit breakers for use in dedicated heating cable circuits shall have a ground‐fault current trip mechanism for equipment protection operating at a current level of 30 mA. GFCI breakers shall be essentially immune to nuisance tripping due to spurious influences such as RF noise, and shall be equipped with a test button on the front.

2.8 TRANSFORMERS

A. Acceptable manufacturers for all dry‐type transformers include Square D, Cutler Hammer, Siemens, or approved equal. Transformers to be designed and manufactured for step up duty for use in power distribution to the NPS Kennicott facilities.

1. Transformers to have 208‐volt Delta primary and 480Y/277 volt, three phase, four wire "Wye" secondary. Transformers configured with 480V primary and 208V secondary and connected in reverse are not acceptable and will be rejected.

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2. Transformers shall have Class H insulation and be designed not to exceed 80 degrees C rise above a 40 degree C ambient under 100 percent full load conditions. The Class H, 80 degree C transformers shall have the ability to carry a continuous 30 percent overload without exceeding a 150 degree C rise above a 40 degree C ambient temperature.

B. Transformer coils must be vacuum impregnated with non‐hygroscopic thermosetting varnish. Each layer shall have end fillers or tie downs to provide maximum mechanical strength. Windings to be continuous from start to finish (no splicing).

C.…