UPDATED_SOW_0004.docx

STATEMENT OF WORK

NATIONAL PARK SERVICE

REPLACE OVERHEAD POWER DISTRIBUTION SYSTEM AT COAL CREEK CAMP

YUKON-CHARLEY RIVERS NATIONAL PRESERVE, ALASKA

April 15, 2025

TABLE OF CONTENTS

SPECIFICATIONS

Section 01 10 00 - Division 01 General Requirements

SECTION 26 05 00 - Common Work Results for Electrical

DRAWINGS COAL CREEK CAMP

Electric Site Plan – E101

Power Riser and Details – E301

SECTION 01 10 00

PART 1 – GENERAL

ITEM 1 - DESCRIPTION OF WORK

1.1 Work Covered by the Contract Documents:

1.1 Project Location: Coal Creek Camp, Yukon-Charley Rivers National Preserve, Alaska. The worksite is approximately a half mile from the airstrip. Park staff can assist with transporting Contractor employees and equipment.

(Lat. / Long.: 65°18'18.09"N / 143° 9'14.83"W)

2.1 Pre-2025 Conditions: The historic Coal Creek Camp was originally built as a gold mining camp in the 1930s to support the nearby Coal Creek Dredge before being acquired by the National Park Service in the late 1980s. It has since been reincarnated as an overnight camp for occasional visitor groups and as a base for park operations. Camp electrical power comes from a 1.65kW solar array/battery bank located on the hill above the main portion of the camp with a portable propane generator for backup and additional battery charging. 120/240V distribution from the batteries runs underground to Pole P4 where it transitions to an overhead distribution line to Pole P5 at the Recreation Building (Juneby Cabin), see drawings.

In the fall of 2024, a non-electrical fire in the camp’s Mess Hall resulted in the total loss of the Mess Hall, Laundry/Shower building and Power Pole P4 on the southwest corner of the Mess Hall.

3.1 Work consists of:

1. Demolition: Demolish the remains of the overhead electrical distribution line from Pole P4 to Pole P5.

2. New Construction:

· The park will provide a new power pole of standard height (approximately 35’) to replace the original Pole 4. The park will also provide and operate the equipment necessary to dig a hole and will assist the contractor with setting the new pole, P4a, in the ground in the general location of Power Pole 4.

· The contractor will be responsible for installing all new pole P4a anchors and guy wires.

· The contractor shall trace the original 120/240V underground electric line from the old Power Pole P4 location back to where the electric line can be determined to be unimpacted by the Mess Hall fire and install a new in-ground junction box.

· The contractor will be responsible for installing new underground distribution cable in 2” conduit from the junction box to a 1-phase service box with disconnect mounted on Pole P4a. The service box shall include 1) access to temporary service at Pole P4a, 2) a circuit for the incinerator, 3) a portable generator inlet, and 4) A manual transfer switch permitting isolation between P4 and the photovoltaic system. This will permit the use of a portable generator to supply power to the storage building and recreation building at Pole P5 during winter operations. The service box shall be equipped with surge protection and new panel ground rods shall also be installed into the earth per NEC requirements.

· The park will provide and operate the equipment necessary to dig a trench for the new underground distribution cable from the junction box to Power Pole P4a.

· The contractor shall install a new overhead distribution line from a service riser in 2” rigid conduit with a weather head at Pole P4a approximately 175 linear feet to the existing service weather head on the Recreation Building and tied back into the building’s electrical panel.

4.1 During the performance of work, the Contractor shall provide adequate professional supervision and quality control to assure the accuracy, quality, and completeness of work. All work shall be performed or directly supervised by an individual possessing an Electrical Administrators License issued by the State of Alaska. The project will be executed under a single contract.

5.1 Period of performance: Work shall be completed on or before August 31, 2026 when camp closes for the season. The Contractor should be aware that the Coal Creek Camp area is prone to local wildfires typically in June/July possibly making logistics in and out of the site and working conditions difficult.

1.6 Government Furnished Items:

A. Standard Power Pole P4a.

B. Equipment and operator to dig a hole for new Power Pole P4a and a trench from the junction box along the original underground service to Power Pole P4a.

ITEM 2 - EXISTING UTILITIES

2.1 Contractor shall be responsible for locating and preventing damage to known utilities. If contractor damage occurs, alert CO and COR as soon as safely possible, and repair utility at no additional expense to the Government. If damage occurs to an unknown utility, contact CO and COR as soon as safely possible.

ITEM 3 - CONTRACTOR’S USE OF PREMISES

3.1 Conduct of Operations: At all times the contractor shall conduct operations in conformance with the rules and regulations promulgated by the Secretary of the Interior for the National Park Service, and applicable park rules and regulations prescribed by the Park Superintendent.

A. No outside fires other than camp stoves are allowed.

B. Smoking is not permitted within any Federal building or within 25 feet of entrances, operable windows, or outdoor air intakes.

C. Public Use of Site: Contractor shall at all times conduct operations to ensure the least inconvenience to the public.

3.2 On-site work hours: Work shall be generally performed during normal business working hours of 8 a.m. to 5 p.m., Monday through Friday, except when otherwise indicated. Work on Saturdays, Sundays, Federal holidays, may be performed with prior consent from the CO and COR. Submit requests for work outside of the stated normal business hours to the CO and COR for approval at least 48 hours in advance of the work.

3.3 Contractor Use of Site:

A. General: Contractor shall have limited use of the site for construction operations. Limit use of premises to construction area immediately along the electrical distribution line to be replaced. Do not disturb portions of Project site beyond areas in which the Work is indicated.

B. Limit site disturbance, including earthwork and clearing of vegetation to: 4 feet either side of the new underground distribution line and an approximate 10 foot radius from the center of the new Power Pole P4a.

C. Utilities

a. General: This is a remote fly-in camp with limited dry cabins that are available for Contractor lodging. There are no cooking or refrigeration facilities and heat in cabins is by a wood stove; contractor should bring paper/cardboard and matches to start the fire. A limited supply of firewood will be provided by the park to be used solely for cabin heat. No collection of firewood from the area is allowed.

b. Water Service: Water from existing water system is available for use however the water is under the influence of surface water and not filtered to potable water standards. Additional filtration or treatment should occur if potable water is required. Use resources wisely and minimize waste of water.

c. Electric Power Service: Electric power from existing photovoltaic system is available but limited to a single service panel approximately 200 meters away from camp. Total power production is low and power may or may not meet your construction power tool requirements. Contractor should provide generators if questionable. Use power in a resourceful manner and avoid excess power waste.

d. Toilets: There is an outhouse with “splash” shower facilities available.

e. Contractor should assume no cell service and bring satellite phones or Starlink.

D. Security and Protection facilities:

1. Environmental Protection: Provide protection, operate temporary facilities, and conduct construction in ways and by methods that comply with state and federal environmental regulations and that minimize possible air, waterway, and subsoil contamination or pollution or other undesirable effects.

1. Cleaning of Equipment: The Contractor shall ensure that prior to moving on to the Project Area, all equipment, is free of soil, seeds, vegetative matter, or other debris that could contain or hold seeds. Ensure that all equipment has been pressure washed and is free of exotic species prior to start-up of operations and moving of equipment to Project Area. Equipment shall be considered free of soil, seeds, and other debris when a visual inspection does not disclose such material. Disassembly of equipment components or specialized inspection tools are not required.

2. Tree and Plant Protection: Provide Tree Protection fence at drip line of trees impacted in construction area. Coordinate with COR.

a. Restore damaged areas to original condition, repairing or replacing damaged trees and plants, at no additional expense to the Government.

b. Provide temporary barriers to protect existing trees and plants and root zones.

c. Do not remove, injure, or destroy trees or other plants without prior approval. Consult with Contracting Officer Representative and remove agreed-on roots and branches that interfere with construction.

d. Do not fasten ropes, cables, or guys to trees.

e. Carefully supervise excavating, grading, filling, and other construction operations near trees to prevent damage.

3. Pest Control: Follow best practices to minimize attraction and harboring of rodents, roaches, and other pests and to perform extermination and control procedures at regular intervals so Project will be free of pests and their residues at project completion. Perform control operations lawfully, using environmentally safe materials.

4. Bears: Follow best practices for in ‘Bear Country’; store food, coolers, items smelling of food like cooking pots, and food waste secured indoors.

5. Site Enclosure Fence: When unattended trenches are left open, provide fencing as per OSHA standards.

3.4 Storage - Staging Areas: Confine Storage of materials and equipment to the Staging Area identified in the upper left of Drawing E101. Keep all equipment and materials off the airstrip.

3.5 Housekeeping:

a. Keep project neat, orderly, and in a safe condition at all times. The Contractor is responsible for flying all waste materials out of the project site and disposing or recycling of waste materials legally outside the park.

b. Address Recycling: Government goal is to salvage and recycle as much nonhazardous construction waste as possible. Use sustainable methods to extent possible during this project, recycling material as is probable with local means. Maintain accurate documentary records for submittal of all recycled materials used including fly ash and slag cement.

3.6 Occupancy Requirements for Buildings: The Government may occupy some Coal Creek Camp Cabins. Cooperate with Government employees during construction operations to minimize conflicts and facilitate Government usage. Perform the Work so as not to interfere with Government's day-to-day operations.

3.7 Photo Documentation:

Contractor must provide existing condition, progress and completion photos. All photos shall be in focus, show maximum range of depth of field general photo and then close up detail photo as needed. Shall be in JPEG digital form and submitted electronically by email.

A. Construction Progress Images:

3.8 Fire and Life Safety:

As a minimum, conduct one weekly 15 minute "toolbox" safety meetings. These meetings shall be conducted by a foreman or supervisor and attended by all construction personnel at the worksite. Topics need to coincide with work scheduled for the following week. Document and submit meeting minutes to the CO and COR within one day after the meeting and document the meetings on the daily reports.

A. Comply with the requirements of NFPA 241 (Standard for Safeguarding Construction, Alteration, and Demolition Operations). Take all necessary precautions to prevent fire during construction. Provide adequate ventilation during use of volatile or noxious substances.

B. Store and handle hazardous materials in accordance with manufacturer’s and OSHA 29CFR1926 Subpart D requirements 1926 | Occupational Safety and Health Administration (osha.gov). Maintain readily available, on site, MSDS/Safety Data Sheets (SDS) for each chemical.

i. Immediately report all spills of hazardous materials to the CO, COR and park.

ii. Maintain a spill emergency response kit.

iii. Train employees how to respond to a spill and use the emergency response kit.

ITEM 4 - ACCIDENT PREVENTION

4.1 Accident Prevention (Safety) Plan:

A. Accident Prevention (Safety) Plan (APP): Submit a site specific accident prevention (safety) plan. The Plan shall be written to comply with OSHA and project requirements (a generic plan is not acceptable) including but not limited to the following:

1. Name and qualifications of responsible supervisor to carry out the program.

2. First aid and rescue procedures.

3. Training, both initial and continuing.

4. Contractor to identify nearest location of medical facility for emergencies

5. Recognition that work will be performed in remote areas with limited communication or cell phone coverage if applicable.

4.2 Qualification of Employees:

A. Ensure that employees are physically qualified to perform their assigned duties in a safe manner to include operators of vehicles and equipment. Provide operating instructions for all equipment.

B. Do not allow employees to work whose ability or alertness is impaired because of drugs, fatigue, illness, intoxication, or other conditions that may expose themselves or others to injury.

C. Work shall be completed by an electrician licensed in the state of Alaska.

4.3 Accident Reporting: The Contractor shall report all accidents to the CO and COR as soon as safely possible and assist the CO and COR and other officials as required in the investigation of the accident.

4.4 First Aid Facilities: Provide access to facilities for the number of employees and appropriate to the hazards associated with the types of ongoing construction work at the site.

4.5 Personal Protective Equipment (PPE): It is the Contractor's responsibility to require all those working on or visiting the site to wear necessary protective equipment at all times.

A. PPE must meet requirements of applicable ANSI standards. Selection shall conform to OSHA 29CFR 1926 Subpart E.

B. All PPE will be serviceable at all times. At a minimum, maintain 2 additional sets of PPE for visiting park staff including hard hats and all other Accident Prevention Plan required equipment.

4.6 Hazardous Materials: It shall be the responsibility of all operators and contractors, functioning within the park to properly cleanup, mitigate and remediate if necessary, all unauthorized discharges of hazardous materials or non-hazardous chemical and biological products released from fleet and/or other support vehicles or stationary sources. Response shall be consistent with guidelines established by federal, state and local regulations, and as outlined within the operator's Safety or Hazardous Materials Business Plan.

A. If a spill, leak or other release occurs, the operator shall as soon as possible, without impeding cleanup, notify the National Park Service Emergency Dispatch.

ITEM 5 - PRECONSTRUCTION CONFERENCE: If the Contracting Officer decides to conduct a preconstruction conference, the successful offeror will be notified and will be required to attend. The Contracting Officer’s notification will include specific details regarding the date, time, and location of the conference, any need for attendance by subcontractors, and information regarding the items to be discussed. See Item 9.1C below.

ITEM 6 - SUBMITTALS

6.1 General Submittal Procedures:

1. Preconstruction Conference Submittal: Satisfactory evidence of liability insurance coverage and workman’s compensation, and any applicable bonds, must be submitted within 10 calendar days of Notice of Award. The following items shall be submitted a minimum of one week prior to the Preconstruction Conference. If all of these documents have not been received one week prior to the scheduled Pre-Construction Conference date, the conference will be cancelled, Notice to Proceed may not be issued, and the Contracting Officer will consider other contractual remedies. Work shall not commence until written Notice to Proceed has been issued. Contracting Officer will notify Contractor of tentative date for the Pre-Construction Conference:

1. Letter designating Project Superintendent.

2. Construction Schedule. (Must include shop drawings, procurement time including long lead time items, mobilization, trade work progression and completion at minimum.)

3. Accident Prevention (Safety) Plan (see section 7 of this document).

4. A list of Subcontractors for this project.

5. Written statements from subcontractors certifying compliance with applicable labor standard clauses (SF1413).

6. Quality Control Plan.

6.2 Shop Drawings, Product Data, and Samples: Contracting Officer will provide sample cover sheet.

A. Product Data: Provide component construction and specification data sheets, anchorage requirements and any other product specific data.

1. Submit Product Data according to Part 9.1 of this section to include one digital file (.PDF or .TIF) to COR.

B. After approving submittals, Contracting Officer and/or COR will return one copy to the Contractor. If submittals are not approved, Contracting Officer will return all copies to Contractor with reasons for rejection. Resubmit, identifying changes. Any work done before approval shall be at Contractor's own risk.

ITEM 7 – TEMPORARY SERVICES

10.1 It is the Contractor’s responsibility to provide temporary services, equipment, tools, and skilled labor as required for the chosen means and methods to perform the work in accomplishing this Contract.

ITEM 8 - PROJECT CLOSEOUT

8.1 Description: The work of this section consists of final cleanup, closeout submittals, final inspection procedures working toward Final Acceptance.

8.2 Cleaning: Remove all tools, equipment, surplus materials, and rubbish. Move attic stock to location coordinated with COR. At time of final inspection, project shall be thoroughly clean and ready for intended use. Inspector holds the right to reschedule if project is not ready for inspection.

8.3 Completion and Final Inspection: Contractor shall submit written certification of project completion and request a final inspection to the Contracting Officer and COR. The Contracting Officer or designee will make an inspection within 10 days of receipt of request or at a mutually agreeable time.

A. If the work is determined to be complete following the final inspection with minor comments, the COR will prepare and provide the Contractor a Punch List noting outstanding items to be addressed.

B. If the work is not determined to be complete following the final inspection, the Contracting Officer will notify Contractor in writing, stating reasons. Contractor, after completing the work according to the Contract Documents, shall resubmit completion and request a new final inspection. Re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction contract clause.

C. Contractor shall complete the Punch List within 30 calendar days or a time directed by the CO.

D. Once Contractor completes all items of work on the Punch List and all contractually required items are accepted, Contracting Officer will issue Letter of Final Acceptance of Work and request the final pay application.

E. If the Contractor fails to complete the work within the time frame, the Contracting Officer may correct the work with an appropriate reduction in contract price or charge for re-inspection costs in accordance with the Inspection of Construction contract clause.

F. Disposition of any permits and warranties required by the specifications in this section.

8.4 Final Acceptance of the Work: After all punch list deficiencies have been corrected, a Letter of Final Acceptance will be issued. A Release of Claims document must be executed and submitted to the Contracting Officer before final payment can occur.

PART 2 – PRODUCTS (NOT USED)

PART 3 – EXCUTION (NOT USED)

END OF SECTION

Section 01 10 00 - General Requirements Page | 1

SECTION 26 05 00 - Common Work Results for Electrical

PART 1 - GENERAL

1.1 BASIC MATERIALS AND METHODS

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

1.2 DRAWINGS

A The Drawings (or Contract Drawings) rely heavily upon symbolic representation of the features shown, and represent exact details only so far as indicated.

1. The Drawings are diagrammatic and are subject to field verification. Contractor is responsible for reviewing and ensuring final installation is fully compliant with all applicable codes.

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 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 National Park Service 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 National Park Service.

4. 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 All Work covered by this Contract shall be performed on de‐energized circuits. Where such de‐energization would deprive the National Park Service of existing service, the Contractor shall give at least 24 hours advance notice of the outage.

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

C 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 National Park Service. Where such adjustments affect functional or aesthetic design of the work, they shall first be submitted to the National Park Service’s Representative for review and approval.

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

E 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.

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

G 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.

H 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 National Park Service.

I Any deviations from the installation shown in these Contract Documents, due to a particular manufacturer's requirements, must be pre-approved through the submittal process and shall be made without additional cost to the National Park Service.

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 National Park Service's judgment shall be final.

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 National Park Service.

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, existing electrical features shall be removed as follows:

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

2. Exposed items shall be removed in their entirety.

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

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.

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 or electrical work, relocate services as required and as directed without additional cost to the National Park Service. 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.

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 CODES

A All work shall comply with the latest adopted editions of:

1. The National Electrical Code.

2. The NFPA Codes.

3. OSHA Regulations.

4. Applicable standards of NEMA, and ANSI.

5. The National Electrical Installation Standards (NEIS) by the National Electrical Contractors Association (NECA).

6. Previous editions of the above, where required by Federal, State or Local laws and regulations.

7. All applicable Federal, State and Local laws and regulations.

1.10 SUBMITTALS

A Prior to the purchase of any materials or equipment, the Contractor shall submit for acceptance data completely describing all items intended for use in the work. This data shall include the manufacturer and identifying number or nomenclature; the manufacturer's published data as to size, capacity, power requirements and dimensions, shop drawings; and such other information as necessary to properly describe each item. Catalog cuts indicating part numbers and fulfilling the requirements above will be considered appropriate for this application.

PART 2 - PRODUCTS

2.1 CONDUCTORS AND CABLES

A Provide 600‐volt wire and cable as shown on the Drawings and further specified herein. All wire and cable shall be of types recognized by the latest specifications of the NEC and/or the ICEA.

B 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.

C 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.

2. Wet Applications ‐ Type UF‐B.

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 GROUNDING

A Conductors: 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: Ground rods shall be 5/8‐inch by 8 feet‐0 inches, except where longer rods are called for on the Drawings, in which case they shall be 5/8‐inch diameter sectional type, length as indicated. All ground rods shall be copper‐coated steel, "Copperweld" or equal.

C Hardware: 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: 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.

2.3 BRANCH CIRCUIT PANELBOARDS

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

B Panelboard Features: Branch panelboards shall be of the bolt‐on circuit breaker type, with the following features:

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

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

3. 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.

4. 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.

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

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

7. Unless otherwise noted, multi‐section panelboards shall have equal quantity of circuit positions in each section, and equal size enclosures for each section.

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 National Park Service. 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.

2.4 OVERCURRENT PROTECTIVE DEVICES

A Circuit Breakers: Unless otherwise noted, circuit breakers shall be of the molded case thermomagnetic type, with the following features:

1. 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.

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

3. 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.

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

5. 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 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.

PART 3 - EXECUTION

3.1 CONDUCTORS AND CABLES

A Color Coding: Conductors No. 6 AWG and smaller shall be color‐coded by factory pigmentation of the insulation. Larger conductors may be color‐coded by wrapping the ends with colored tape in all enclosures, except that white (or gray) and green conductors may never be phase‐taped for any use other than neutral and ground, respectively. Color‐coding throughout the entire installation shall be as follows:

B Installation

1. Install cable in accordance with NECA Standards of Installation.

2. Branch circuit conductors shall be No. 12 AWG copper, except for the following: Where branch circuit conductor sizes are indicated on the drawings, they shall take precedence over the foregoing. Where field conditions dictate circuit routings that increase conductor lengths beyond what would be expected from the layout shown on the drawings, they shall be submitted to the National Park Service for acceptance.

3. All conductor connections shall be made up securely with solderless pressure connectors such as setscrew lugs, wirenuts, "wingnuts", insulated tap connectors, insulation piercing tap connectors, or suitable crimp fittings. Split bolt connector shall not be used. Where the connector manufacturer does not require twisting together of conductors, conductors shall be left untwisted.

4. Use compression type connectors for copper wire splices and taps, #6 AWG and larger. Utilize heat shrink tubing of the proper voltage rating for uninsulated conductors and connectors.

5. Thoroughly clean wires before installing lugs and connectors.

6. Make splices, taps and terminations to carry full ampacity of conductors without perceptible temperature rise.

7. Terminate spare conductors with wire nuts.

8. Where stranded conductors are used, their ends shall be terminated with crimpon connectors (T & B Sta‐Kon, or equal), set screw lugs, box lugs, or self‐lifting pressure terminals.

9. Flexible cords shall be connected to equipment, fixtures, boxes, or other enclosures only by means of cord‐grip bodies or other strain‐relief fittings specifically designed for the purpose.

10. Where conductors or their connectors are to be connected to metal surfaces, the surface shall first be scraped free of any paint, oxide, or other non‐conductive substances. Where there is a possibility of corrosion due to moisture or other cause, a conductive corrosion inhibitor shall be used between the conductor and the metal surface.

11. Where compression fittings are used to terminate conductors operating under 600 volts, the fitting shall have a viewport, or other approved method, so that it can be verified that the conductor is properly seated in the connector.

12. Conductor terminations shall use the manufacturer’s recommended methods and hardware unless specifically noted otherwise.

13. Neatly train and lace wiring inside boxes, equipment and panelboards.

14. All conductors shall be protected from damage. Where the conductor or insulation is damaged, the National Park Service may require, at no cost to the National Park Service, the replacement of the entire conductor, or the implementation of an approved repair method approved by the National Park Service.

15. Provide dedicated neutral conductors to branch circuits where neutral conductors are required. Multi‐wire branch circuits are not permitted. Use of handle tied breakers to provide simultaneous disconnection of ungrounded conductors for multi‐wire branch circuits is not permitted unless specifically called out elsewhere in these contract documents.

3.2 IDENTIFICATION

A Circuit Directories

1. Branch panelboard doors shall have accurate typed circuit directory cards of the two‐column type, with odd numbers down the left, and even numbers down the right, with numbers increasing from top to bottom. Multi‐pole breakers shall be labeled with each of the single pole spaces occupied.

2. Provide new updated typed circuit directories for all panelboards affected by the Work of this project. Each entry shall accurately and uniquely identify the specific purpose of the connected load (i.e., Lighting, Receptacles, Mechanical Equipment, etc.) in accordance with NEC 408.4.

3.3 GROUNDING

1. General: All metal raceways, enclosures, and other electrical equipment, as well as nonelectrical equipment that may pick up harmful potentials from the electrical system, shall be securely bonded and grounded as required by the NEC, the Drawings, and this Specification.

B Concealed Connections: Permanent grounding connections, where permitted by the NEC to be concealed, shall not be so concealed until inspected and accepted by the National Park Service or their authorized representative. Failure to comply with this requirement will make the contractor liable for any expenses incurred in the process of re‐exposing the connections for inspection, and subsequent repair and patching of the concealing construction, including the work of other trades. The Contractor shall schedule inspection of such connections at least one week in advance of concealment and will not be entitled to any additional compensation or time extension for delays caused by inability of the National Park Service or their representative to be available at the desired time.

C Grounding Conductor Raceway Bonding: All grounding electrode conductors run in metal raceways shall be bonded to the raceway at both ends. At grounding electrodes, compliance with NEC requirements for conduit connection to the electrode will satisfy this requirement.

D Concentric and Eccentric Knockouts: In addition to the NEC requirements for service equipment, metal raceways throughout the project shall be provided with bonding bushings and NEC‐sized bonding jumpers where they enter enclosures through concentric or eccentric knockouts, reducing washers, or other arrangements that may be disturbed by relative movement between raceway and enclosure.

E External Bonding Jumpers: Where the NEC permits grounding conductors external to, but routed with, a raceway, such routing shall be accomplished by spiraling the conductor around the raceway no more than two revolutions.

F Field Quality Control

1. Inspect grounding and bonding system conductors and connections for tightness and proper installation.

2. Grounding and bonding conductors shall be terminated using a separate terminal for each conductor.

3.4 BRANCH CIRCUIT PANELBOARDS

A Installation

1. Branch panelboards shall be securely fastened to the structural framing of the surrounding construction and shall be installed plumb with the surrounding construction. Flush‐mounting panelboards shall be installed with their enclosures flush with the finished wall surface.

2. Height: 6 feet to top of panelboard.

3. Provide filler plates for unused spaces in panelboards.

4. In multi‐section panelboards, conductors shall directly enter the section to which they make connection, without being routed through other sections. Where this is not possible, the National Park Service shall be contacted for acceptance of alternate arrangements.

5. Conductors shall not be spliced in panelboards.

6. All conductors shall be routed so as to pass to the outside of the deadfront support brackets and bussing equipment, and shall be provided with a minimum of 3 inches of slack after termination in their designated location.

B Circuit Directories: Branch panelboard doors shall have accurate typed circuit directory cards of the two‐column type, with odd numbers down the left, and even numbers down the right, with numbers increasing from top to bottom. Multi‐pole breakers shall be labeled with each of the single pole spaces occupied. Where room numbers are used, they shall be the final assigned room numbers.

3.5 OVERCURRENT PROTECTIVE DEVICES

A Provide overcurrent protective devices as shown on the drawings and as specified herein.

B Single pole breakers with handle ties are not acceptable for multi‐pole breakers.

3.6 FINAL ACCEPTANCE: Final acceptance will require the contractor to deliver to the Project Manager the record drawings showing the final configuration(s).

END OF SECTION

SECTION 26 05 00 - Common Work Results for Electrical Page | 1