Div 26.pdf

OFFUTT AIR FORCE BASE

26 05 00-1 (Repair AHU 1096C E-Wing, B500)

(082069) 2009 by FEI

SECTION 26 05 00

GENERAL ELECTRICAL

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions, apply to this Section.

1.2 RESPONSIBILITIES

A. The Bidding Requirements, Conditions of Contract, General Specifications and Special Conditions, and this Division shall be binding on the Contractor and shall apply to all electrical work to be completed under this section.

B. The Contractor shall be responsible for the work from the date of his Contract until its acceptance by the Contracting Officer and must make good all damages sustained from whatever cause. He shall use proper care and diligence in bracing and securing all parts of the work and shall in all cases judge as to the amount of protection required.

1.3 ORDINANCES, LAWS AND CODES

A. All work shall conform to the rules and regulations of the National Electrical Code, Local Code, "Occupational Safety and Health Act" and the State Fire Marshall's Office. All certificates of approval shall be delivered to the Contracting Officer before final payment will be made.

B. Should any change in the drawings and/or specifications be required to conform to the above mentioned laws and ordinances, the Contracting Officer shall be notified by the Bidder prior to the Bid

Date, that the necessary changes may be completed. After the Bid Date, all work necessary to meet the requirements shall be at Contractor's expense, with no additional cost to the Contracting Officer.

C. The Contractor shall pay all fees, permits or taxes for inspections, etc., in connection with the work under this Contract.

1.4 DATA AND MEASUREMENT

A. The data given herein and on the drawings is as exact as could be secured insofar as building construction and existing conditions are concerned. Extreme accuracy is not guaranteed. The drawings and specifications are intended for the assistance of the Contractor in achieving the end result. Exact locations, measurements, distance, levels, etc., will be governed by conditions at the Job

Site.

B. The Contractor shall verify that the size of the equipment supplied by the selected manufacturers does not exceed the available mounting space.

C. The Contracting Officer reserves the right to change location or size of conduits, outlets, fixtures or other pieces of equipment as may be necessary to avoid conflicts. No extra compensation will be allowed for such changes unless additional cost to the Contractor is caused.

D. The Bidder shall visit the Project Site that he may have knowledge of conditions at the Job Site and adapt his work to such conditions.

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1.5 DRAWINGS AND SPECIFICATIONS

A. Anything mentioned in this specification and not shown on the drawings or vice versa shall be of like effect, as shown or mentioned in both. In any case of discrepancy or differences in the figures, drawings or specifications, the Bidder shall promptly report such discrepancies to the Contracting

Officer who shall make a decision in writing. Any adjustment by the Contractor without this decision shall be at the expense of the Contractor.

1.6 QUALITY OF WORKMANSHIP

A. The Contractor shall give his personal superintendence and direction to the work. He shall also keep a competent foreman or superintendent on the Project.

B. All equipment, controls and junction boxes shall be located for ready access, operation, repair or maintenance.

C. Any additional drawings necessary for the prosecution of the work will be furnished by the Contracting

Officer as promptly as possible. The Contractor shall request any additional instructions needed and shall do no work without drawings and instructions.

D. Any discrepancies between the Drawings shall be reported to the Contracting Officer prior to the Bid

Date.

1.7 GUARANTEE

A. This Contractor shall guarantee all materials, workmanship and the successful operation of all apparatus furnished and installed by him for a period of one (1) year from the date of the final acceptance of the whole work, and shall guarantee to repair or replace at his own expense any part of the apparatus which may show defect during that time, provided such defect is, in the opinion of the

Contracting Officer, due to imperfect material or workmanship and not to carelessness or improper operation. Guarantee period for the replacement shall begin with the date of replacement.

B. The Contracting Officer shall notify the Contractor of any failure of any part or parts which occur during the guarantee period.

C. The Contractor shall also guarantee the systems and the apparatus to be working properly to meet all conditions as specified.

1.8 SUBMITTALS

A. Submittals in accordance with the requirements of Section 1B. On or before thirty days after Award of this Contract, the contractor shall submit seven (7) copies of all fabricated work and equipment to be purchased of the General Conditions. Data shall be sufficiently completed to permit evaluation and comparison with specified equipment and material.

B. All drawings shall bear the Contractor’s stamp of approval and must be dated.

C. Product data shall include, but not be limited to the following:

1. Identification products.

2. Variable Frequency Drives (VFD’s).

3. Circuit Breakers.

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D. A notation shall be made on each item submitted as to its specified use or description of specific location in the work.

E. None of the preceding items shall be purchased, delivered to the site or installed until the item has been properly submitted in writing and reviewed by the Contracting Officer.

F. Submittals shall be made even though the item is exactly as specified.

G. Should the Contractor fail to comply with any of the requirements as stated, the Contracting Officer reserves the right to select a full line of materials, appliances and equipment, which shall be final and binding upon the Contractor.

PART 2 - PRODUCTS

2.1 PROTECTION OF FIXTURES AND WARES

A. This Contractor shall apply the necessary protective coverage to fixtures and other equipment to prevent scratches and mars to such equipment as a result of falling objects or work of other trades.

2.2 STORAGE

A. This Contractor shall provide and be responsible for safe storage of his materials and such storage shall not interfere with the work of others or progress of the Project in any manner.

2.3 EQUIPMENT ENCLOSURES

A. Provide enclosures, which mate properly with the equipment to be enclosed and are NEMA rated to suit the atmospheric conditions of the equipment surroundings.

B. Equipment in corrosive atmospheres shall be rated NEMA 4X. All NEMA 4X equipment shall be stainless steel. Painted steel is not acceptable for NEMA 4X applications.

PART 3 - EXECUTION

3.1 COORDINATION

A. Before installing any work, this Contractor shall coordinate the electrical work with all other Contractors on the Project. Coordinate with work of separate concurrent projects running simultaneously in the buildings. Adjust work plans as required to coordinate with other projects or trades.

B. All electrical work shall be installed in proper sequence and so arranged with other trades that there will be no delay in the proper installation and completion of any part or parts of all piping systems and mechanical equipment.

C. This Contractor shall carefully examine the drawings and shall be responsible for the proper fitting of equipment and conduit as indicated without major alteration. If alterations are required, a detailed drawing of the proposed departure due to actual field conditions or other causes shall be submitted to the Contracting Officer for approval.

D. Whenever interferences might occur, before installing any of the work in question, the Electrical

Contractor shall consult with other Contractors and shall come to an agreement with them as to the exact location and level of his conduit, bus duct, light fixtures, and/or parts of his installation.

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E. All changes in the work of this Contractor, caused by his neglect to follow these instructions, shall be made at this Contractor's expense.

3.2 DITCHING, EXCAVATION AND BACKFILLING (NOT USED)

3.3 CONNECTIONS FOR EQUIPMENT

A. Coordinate the hook up of the following equipment with the Contractor required to furnish and install them.

Mechanical Equipment

B. Verify fuse and/or circuit breaker requirements for electrical connections to equipment and provide overcurrent devices accordingly.

C. The plans indicate the locations of system devices. The Contract shall include the wiring system required to interconnect the indicated devices to result in a complete, operating system. The interconnecting wiring shall be in conformity with the requirements of the manufacturer of the equipment as well as with other requirements set out herein. The basic wiring method to be employed is indicated herein.

3.4 WORK IN EXISTING BUILDING

A. Inasmuch as work under this Contract includes adding to in the existing building, it shall be the responsibility of each Bidder to fully inform himself of any and all conditions which influence or are influenced by work contemplated by these specifications and accompanying drawings. The submission of a proposal by any Bidder will be construed as an admission by him that he has examined and is fully familiar with the premises and all conditions thereon and adjacent thereto, and has included in this proposal a proper and adequate amount to cover rearrangement of old work for the proper installation and operation of the new and existing equipment as shown on the drawings specified herein or as required. Such work shall be neatly and properly done.

B. Maintain existing electrical service and feeders to occupied areas and operational facilities, unless otherwise indicated or when authorized otherwise in writing by Contracting Officer. Provide temporary service during interruptions to existing facilities. When necessary, schedule momentary outages for replacing existing wiring systems with new wiring systems. When that "cutting-over" has been successfully accomplished, remove, relocate or abandon existing wiring as indicated.

C. The operation of all special systems within the building shall be maintained, including but not limited to fire alarm, telephone, intercom, communication, data, security, emergency call, etc. Provide temporary connections/equipment as necessary for required sequence of construction. Any necessary momentary outages shall be scheduled with the Contracting Officer prior to starting such work.

3.5 DEMOLITION AND REMOVAL OF EXISTING EQUIPMENT AND MATERIALS

A. Existing conduits that are made spare by demolition work shall be removed unless concealed in existing construction.

B. All conduits shown to be reused shall be thoroughly tested and checked for continuity, existing conduits must meet all new requirements to be acceptable for re-use.

C. Electrical items must be removed where they interfere with or are not concealed by new construction such as new ceilings, walls, etc.

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D. Existing control panels, devices and other equipment and material shall be relocated, removed, reconnected or left in place as indicated on the drawings. Where an existing device is shown removed from an existing circuit, new wiring shall be provided as required to insure continuity of existing circuit.

If existing devices or other electrical items, such as electrically operated equipment interfere with the relocation of existing equipment, new equipment, etc., the existing items including electrical components of electrically operated equipment shall be disconnected and removed or satisfactorily relocated and reconnected even though not specifically indicated on the drawings. All material removed which is considered salvageable by the Contracting Officer and is not specifically designated to be reused on the drawings or not practical to be reused shall remain in the property of the

Contracting Officer and shall be neatly stockpiled in a specially designated location.

3.6 CLEANING

A. This Contractor shall at all times keep the premises free of all waste or surplus materials, rubbish and debris which is caused by his employees or resulting from his work.

B. After all equipment and fixtures have been installed and building is ready for occupancy, the Electrical

Contractor shall remove all stickers, rust stains, labels, temporary covers, plaster marks, paint spots, etc. All foreign matter shall be blown out or flushed out of all conduits, panels, motors, devices, switches, fixtures, etc.

C. Identification plates and trims on all equipment shall be free of paint and polished.

D. The Contractor shall leave the electrical portion of the work in a safe clean and very neat condition ready for operation.

3.7 RECORD DRAWINGS

A. The Contractor shall maintain an up-to-date set of plans and specifications on the Job Site. He shall mark all Addendum Items and any field changes on this set and see that a copy of all changes is furnished to the Contracting Officer at the end of the Project.

B. The drawings shall also include as-built conditions such as equipment locations, power sources and devices, etc.

3.8 INSTRUCTION IN OPERATION BOOKS AND SPARE PARTS

A. After all tests and adjustments have been made, the Contractor shall furnish the necessary qualified personnel to place the systems in continuous operation, during which time he shall provide complete

Operating and Maintenance Instructions to the Contracting Officer's representative with an outline of instructions in written form. These personnel shall reserve adequate time to instruct the Contracting

Officer's representative on proper operation (including all phases of the system and each of its component parts).

B. Contractor shall furnish Contracting Officer with seven (7) sets of all operating instructions, maintenance instruction and spare parts lists of all equipment furnished under this Contract. Lists shall include current unit prices and source of supply for each item of operable equipment.

3.9 FIRESTOPPING

A. Openings around electrical penetrations through fire-resistant rated walls, partitions, floors or ceilings shall be firestopped using listed materials to maintain the fire rating. Installation shall be done in accordance with manufacturer's recommendations. Materials shall be UL Listed and labeled and FM approved for fire ratings consistent with penetrated barriers.

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1. Foamed-in-place type firestopping shall only be permitted in concealed-from-view locations.

Sealant type firestopping shall be used in exposed-to-view locations.

3.10 TESTS AND ADJUSTMENTS

A. Upon completion of installation of electrical connections, and after circuitry has been energized with rated power source, test connections to demonstrate capability and compliance with requirements.

Ensure that direction of rotation of each motor fulfills requirement. Correct malfunctioning units at site, then retest to demonstrate compliance.

B. During the progress and after completion of the work included under this specification, the Contractor shall make all required tests at his own expense in the presence of the Contracting Officer as required hereinafter and by local ordinances, codes, laws and regulations. Such tests shall be in accordance with other sections of this division. The Contracting Officer shall be notified five (5) days in advance as to the time when such tests are to be performed that a representative of the Contracting Officer may be present.

END OF SECTION

26 05 19-1 (Repair AHU 1096C E-Wing, B500)

SECTION 26 05 19

WIRES AND CABLES

A. Drawings and general provisions of Contract, including General and Supplementary Conditions, apply

1.2 SUMMARY

A. Extent of electrical wire and cable work is indicated by drawings. Wires and cables shall be single, insulated conductors, field-installed in continuous raceways.

B. Types of electrical wire, cable and connectors specified in this section include the following:

1. Copper conductors.

2. Tap type connectors.

3. Wirenut connectors.

2.1 ACCEPTABLE MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products of one (1) of the following

(for each type of wire, cable and connector):

1. Wire and Cable:

a. Apex Wire and Cable Corp.

b. American Insulated Wire Corp.

c. American Wire and Cable Co.

d. Belden Div; Cooper Industries.

e. Brand-Rex Div; Pyle National Co.

f. Cerro Wire and Cable Corp.

g. Cleveland Insulated Wire Co.

h. General Cable Corporation.

i. Helix Wire Corporation.

j. Houston Wire.

k. Indiana Insulated Wire Inc.

l. Laribee Wire Manufacturing Co., Inc.

m. Madison Wire and Cable Corp.

n. Okonite Co.

o. Pirelli Cable Corp.

p. Radix Wire Co.

q. Rome Cable Corp.

r. Southwire Company.

s. Triangle PWC, Inc.

2. Connectors:

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a. AMP, Inc.

b. Appleton Electric Co; Emerson Electric Co.

c. Buchanan Co.

d. Burndy Corporation.

e. Brand-Rex Div. Pyle National Co.

f. Electrical Products Div; Midland-Ross Corp.

g. General Electric Co.

h. Gould, Inc.

i. Ideal Industries, Inc.

j. Leviton Mfg Company.

k. 3M Company.

l. O-Z/Gedney Co.

m. Southport Industries Inc.

n. Square D Company.

o. Thomas and Betts Corp.

2.2 WIRES, CABLES AND CONNECTORS

A. General: All reference to size in these specifications or on drawings is for copper conductors. Provide electrical wires, cables and connectors of manufacturer's standard materials, as indicated by published product information; designed and constructed as recommended by manufacturer, for a complete installation and for application indicated. Except as otherwise indicated, provide copper conductors with conductivity of not less than 98% at 20 o C (68 o F).

B. Building Wires: Provide factory-fabricated wires of sizes, ampacity rating, and materials for applications and services indicated. Where not indicated, provide proper wire selection as determined by Installer to comply with project's installation requirements, NEC and NEMA Standards.

C. Cables: Provide UL-type factory-fabricated cables of sizes, ampacity ratings, and materials and jacketing/sheathing as indicated for services indicated. Where not indicated, provide proper selection as determined by Installer to comply with installation requirements, NEC and NEMA Standards.

D. Connectors: Provide UL-type factory-fabricated, metal connectors of sizes, ampacity ratings, materials, types and classes for applications and for services indicated. Where not indicated, provide proper selection as determined by Installer to comply with project's installation requirements, NEC and NEMA

Standards.

3.1 INSTALLATION OF WIRES AND CABLES

A. General: Install electrical cables, wires and wiring connectors as indicated, in compliance with applicable requirements of NEC, NEMA, UL and NECA's "Standard of Installation" and in accordance with recognized industry practices.

B. The minimum size wire shall be 12 AWG. All wire No. 10 and No. 12 shall be solid, all No. 8 and larger shall be stranded. Provide a green insulated ground conductor for all circuits.

C. All feeder and branch circuit wiring shall be type THHN/THWN, except THWN-2 or XHHW-2 shall be used in wet locations.

D. Pull conductors simultaneously where more than one (1) is being installed in same raceway.

E. Use pulling compound or lubricant, where necessary; compound used must not deteriorate conductor or insulation. Use of soap will not be permitted as pulling lubricant.

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F. Insulation on conductors shall be permanently marked with wire size, insulation type, voltage range and manufacturer's name. The insulation on conductors shall be color coded as follows:

1. 120/208-volt circuit (match existing): Phase A - Black; Phase B - Red; Phase C - Blue.

2. 277/480-volt circuit (match existing): Phase A - Brown; Phase B - Orange; Phase C - Yellow.

G. The phase conductors shall be tagged and shall remain the same throughout the circuit.

H. Switch legs shall be color coded to distinguish them from Hot or Phase Conductors.

I. Switch legs occurring in the same box or enclosure shall be color coded separately.

J. Exceptions to the color coding as listed above shall be as follows:

1. Wiring for special systems shall be color coded or labeled as required by the manufacturer.

K. Use pulling means including, fish tape, cable, rope and basket weave wire/cable grips which will not damage cables or raceway.

L. Keep conductor splices to minimum.

M. Install splices and taps which possess equivalent-or-better mechanical strength and insulation ratings than conductors being spliced.

N. Use splice and tap connectors which are compatible with conductor material.

O. All splices and taps shall be made in outlet, junction and pull boxes. Splices on circuit wiring shall be of the pigtail type using solderless connectors. Larger sizes of conductors requiring uninsulated connectors of the bolt type shall be taped with pressure sensitive vinyl tape.

P. For branch circuit wiring, conductor fill per conduit run shall not contain more than eight (8) current carrying wires, provided the wire size is derated as required by the National Electrical Code. Conduits containing both circuit switch legs and/or traveler wires may contain more than the number stated above, providing the conduit is of adequate size and the wire size is derated as required by the National

Electrical Code. Whenever a 120-volt, single phase branch circuit is over 70-feet in length or a 277-volt, single phase branch circuit is over 150-feet, and the load is in excess of 50% of the branch circuit protective device, the conductors shall be increased one (1) size to the first outlet box unless specifically noted otherwise. For special systems conductor fill of conduit is per manufacturers specifications furnished with each system, noted on the drawings or shall be as required by code.

Q. Tighten electrical connectors and terminals, including screws and bolts, in accordance with manufacturer's published torque tightening values. Where manufacturer's torquing requirements are not indicated, tighten connectors and terminals to comply with tightening torques specified in UL

Standard 486A and B.

3.2 FIELD QUALITY CONTROL

A. Prior to energizing circuitry, check installed wires and cables with megohm meter to determine insulation resistance levels to ensure requirements are fulfilled.

B. Prior to energizing, test wires and cables for electrical continuity and for short-circuits.

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C. Subsequent to wire and cable hook-ups, energize circuitry and demonstrate functioning in accordance with requirements. Where necessary, correct malfunctioning units and then retest to demonstrate compliance.

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SECTION 26 05 29

SUPPORTING DEVICES

A. Drawings and general provisions of Contract, including General and Supplementary Conditions, apply

1.2 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions and

Division 1 Specification Sections, apply to this Section.

1.3 SUMMARY

A. This Section includes secure support from the building structure for electrical items by means of hangers, supports, anchors, sleeves, inserts, seals and associated fastenings.

1. Refer to other Division 26 Sections for additional specific support requirements that may be applicable to specific items.

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by the following:

1. Slotted Metal Angle and U-Channel Systems:

a. Allied Tube & Conduit.

b. American Electric.

c. B-Line Systems, Inc.

d. Cinch Clamp Co., Inc.

e. GS Metals Corp.

f. Haydon Corp.

g. Kin-Line, Inc.

h. Unistrut Diversified Products.

2. Conduit Sealing Bushings:

a. Bridgeport Fittings, Inc.

b. Cooper Industries, Inc.

c. Elliott Electric Mfg. Corp.

d. GS Metals Corp.

e. Killark Electric Mfg. Co.

f. Madison Equipment Co.

g. L.E. Mason Co.

h. O-Z/Gedney.

i. Producto Electric Corp.

j. Raco, Inc.

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k. Red Seal Electric Corp.

l. Spring City Electrical Mfg. Co.

m. Thomas & Betts Corp.

2.2 COATINGS

A. Coating: Supports, support hardware, and fasteners shall be protected with zinc coating or with treatment of equivalent corrosion resistance using approved alternative treatment, finish or inherent material characteristic.

2.3 MANUFACTURED SUPPORTING DEVICES

A. Raceway Supports: Clevis hangers, riser clamps, conduit straps, threaded C-clamps with retainers, ceiling trapeze hangers, and wall brackets.

B. Fasteners: Types, materials and construction features as follows:

1. Expansion Anchors: Carbon steel wedge or sleeve type.

2. Toggle Bolts: All steel springhead type.

3. Powder-Driven Threaded Studs: Not Allowed.

C. Conduit Sealing Bushings: Factory-fabricated watertight conduit sealing bushing assemblies suitable for sealing around conduit or tubing passing through concrete floors and walls. Construct seals with steel sleeve, malleable iron body, neoprene sealing grommets or rings, metal pressure rings, pressure clamps and cap screws.

D. U-Channel Systems: 16-gage steel channels, with 9/16-inch diameter holes, at a minimum of 8-inches on center, in top surface. Provide fittings and accessories that mate and match the U-channel and are of the same manufacturer.

2.4 FABRICATED SUPPORTING DEVICES

A. General: Shop- or field-fabricated supports or manufactured supports assembled from U-channel components.

B. Steel Brackets: Fabricated of angles, channels and other standard structural shapes. Connect with welds and machine bolts to form rigid supports.

C. Pipe Sleeves: Provide pipe sleeves of one (1) of the following:

1. Sheet Metal: Fabricate from galvanized sheet metal; round tube closed with snaplock joint, welded spiral seams or welded longitudinal joint. Fabricate sleeves from the following gage metal for sleeve diameter noted:

a. 3-inches and smaller: 20-gage.

b. 4-inch to 6-inches: 16-gage.

c. Over 6-inches: 14-gage.

2. Steel Pipe: Fabricate from Schedule 40 galvanized steel pipe.

3. Plastic Pipe: Fabricate from Schedule 80 PVC plastic pipe.

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3.1 INSTALLATION

A. Install supporting devices to fasten electrical components securely and permanently in accordance with

NEC requirements.

B. Coordinate with the building structural system and with other electrical installation.

C. Raceway Supports: Comply with the NEC and the following requirements:

1. Conform to manufacturer's recommendations for selection and installation of supports.

2. Strength of each support shall be adequate to carry present and future load multiplied by a safety factor of at least four (4). Where this determination results in a safety allowance of less than 200 lbs, provide additional strength until there is a minimum of 200 lbs safety allowance in the strength of each support.

3. Install individual and multiple (trapeze) raceway hangers and riser clamps as necessary to support raceways. Provide U-bolts, clamps, attachments, and other hardware necessary for hanger assembly and for securing hanger rods and conduits.

4. Support parallel runs of horizontal raceways together on trapeze-type hangers.

5. Attach raceways directly to building structure (structural concrete, structural wood, or steel red iron), or to unistrut trapeze supported directly from building structure with 3/8-inch minimum threaded rods. Wire type supports and click-type hangers shall not be allowed. Do not fasten to roof decking.

6. Support exposed and concealed raceway within 1-foot of an unsupported box and access fittings. In horizontal runs, support at the box and access fittings may be omitted where box or access fittings are independently supported and raceway terminals are not made with chase nipples or threadless box connectors.

7. In vertical runs, arrange support so that load produced by the weight of the raceway and the enclosed conductors is carried entirely by the conduit supports with no weight load on raceway terminals.

D. Miscellaneous Supports: Support miscellaneous electrical components as required to produce the same structural safety factors as specified for raceway supports. Install metal channel racks for mounting cabinets, control enclosures, contactors, VFD’s, pull boxes, junction boxes, transformers and other devices.

E. Support sheet metal boxes directly from the building structure or by bar hangers.

F. Sleeves: Install in concrete slabs and walls and all other firerated floors and walls for raceways and cable installations. For sleeves through fire rated-wall or floor construction, apply UL Listed firestopping sealant in gaps between sleeves and enclosed conduits and cables.

G. Conduit Seals: Install seals for conduit penetrations of slabs on grade and exterior walls below grade and where indicated. Tighten sleeve seal screws until sealing grommets have expanded to form watertight seal.

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H. Fastening: Unless otherwise indicated, fasten electrical items and their supporting hardware securely to the building structure, including but not limited to conduits, raceways, cables, cable trays, cabinets, transformers, boxes, and control components in accordance with the following:

1. Fasten by means of wood screws or screw-type nails on wood, toggle bolts on hollow masonry units, concrete inserts or expansion bolts on concrete or solid masonry, and machine screws, welded threaded studs, or spring-tension clamps on steel. Threaded studs driven by a powder charge shall not be allowed. Do not weld conduit, pipe straps or items other than threaded studs to steel structures. In partitions of light steel construction, use sheet metal screws.

2. Holes cut to depth of more than 1-1/2-inch in reinforced concrete beams or to depth of more than 3/4-inch in concrete shall not cut the main reinforcing bars. Fill holes that are not used.

3. Ensure that the load applied to any fastener does not exceed 25% of the proof test load. Use vibration- and shock-resistant fasteners for attachments to concrete slabs.

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SECTION 26 05 33

RACEWAYS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions, apply

A. All wiring shall be installed in continuous raceways.

B. Types of raceways in this section include the following:

1. Electrical metallic tubing.

2. Rigid heavy-wall metal conduit.

3. Flexible metal conduit.

2.1 METAL CONDUIT AND TUBING

A. General: Provide metal conduit, tubing and fittings of types, grades, sizes and weights (wall thicknesses) for each service indicated. Where types and grades are not indicated, provide proper selection determined by Installer to fulfill wiring requirements and comply with applicable portions of

NEC for raceways.

B. Rigid Heavy-Wall Steel Conduit: Provide rigid steel, heavy wall, zinc-coated, threaded type conforming to ANSI C80.1 and UL 6. Provide zinc coating fused to inside and outside walls.

1. Rigid Metal Conduit Fittings: Rigid metal conduits shall have threaded couplings.

C. Flexible Metal Conduit: Provide flexible metal conduit conforming to UL 1. Formed from continuous length of spirally wound, interlocked zinc-coated strip steel.

1. Flexible Metal Conduit Fittings: Provide conduit fittings for use with flexible steel conduit of threadless hinged clamp type.

a. Straight Terminal Connectors: One-piece body, female end with clamp and deep slotted machine screw for securing conduit and male threaded end provided with locknut.

b. 45 o or 90 o Terminal Angle Connectors: Two-piece body construction with removable upper section, female end with clamp and deep slotted machine screw for securing conduit and male threaded end provided with locknut.

D. Electrical Metallic Tubing (EMT): Provide electrical metallic tubing conforming to ANSI C80.3 and UL

797.

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1. EMT Fittings: Fittings for EMT shall be steel and may be of the screw or compression type.

Steel compression type shall be used in wet locations. All EMT connectors shall be of the insulated throat type. Cast or indenter fittings are not acceptable. EMT connectors shall be fastened to box or enclosure with locknuts. Snap-in fittings are not acceptable.

2. Steel EMT connectors with male threads on the locknut and female threads on the connector equal to Cooper Crouse-Hinds Space-Saver connectors may be used in lieu of insulated throat type connectors.

E. Conduit Bodies: Provide galvanized cast-metal conduit bodies of types, shapes and sizes as required to fulfill job requirements and NEC requirements. Construct conduit bodies with threaded-conduit-entrance ends, removable covers, either cast or of galvanized steel and corrosion-resistant screws.

2.2 WIREWAYS

A. General: Provide electrical wireways of types, grades, sizes, and number of channels for each type of service as indicated. Provide complete assembly of raceway including, but not limited to, couplings, offsets, elbows, expansion joints, adapters, holddown straps, end caps and other components and accessories as required for complete system.

B. Lay-in Wireways: Construct lay-in wireways with hinged covers, in accordance with UL 870 and with components UL Listed, including lengths, connectors and fittings. Select units to allow fastening hinged cover closed without use of parts other than standard lengths, fittings and connectors.

Construct units to be capable of sealing cover in closed position with sealing wire. Provide wireways with knockouts.

1. Connectors: Provide wireway connectors suitable for "lay-in" conductors, with connector covers permanently attached that removal is not necessary to utilize the lay-in feature.

2. Finish: Protect sheet metal parts with rust inhibiting coating and baked enamel finish. Plate finish hardware to prevent corrosion. Protect screws installed toward inside of wireway with spring nuts to prevent wire insulation damage.

C. Raintight Wireway: Construct raintight lay-in wireways with hinged covers, in accordance with UL 870 and with components UL Listed, including lengths, connectors and fittings. Design units to allow fastening hinged cover closed without use of parts other than standard lengths, fittings and connectors.

Construct units to be capable of sealing cover in closed position with sealing wire. Provide wireway units with knockouts only in bottom of troughs.

D. Raintight Troughs: Construct in accordance with UL 870, with components UL Listed.

1. Construction: 16-gage galvanized sheet metal parts for 4-inch x 4-inch to 6-inch x 6-inch sections, and 14-gage parts for 8-inch x 8-inch and larger sections. Provide knockouts only in bottom of troughs, with suitable adapters to facilitate attaching to other NEMA 3R enclosures.

Do not use gasketing that can rip or tear during installation, or would compromise raintight capability of the trough. Do not use cover screws that will protrude into the trough area and damage wire insulation.

2. Finish: Provide 14-gage and 16-gage galvanized sheet metal parts with corrosion-resistant phosphate primer and baked enamel finish. Plate hardware to prevent corrosion.

26 05 33-3 (Repair AHU 1096C E-Wing, B500)

3.1 INSTALLATION OF RACEWAYS

A. General: Install raceways as indicated; in accordance with manufacturer's written installation instructions, and in compliance with NEC and NECA's "Standards of Installation". Install units plumb and level and maintain manufacturer's recommended clearances.

B. Coordinate with other work including wires/cables, boxes and panel work, as necessary to interface installation of electrical raceways and components with other work.

3.2 INSTALLATION OF CONDUITS

A. General: All conduits shall be concealed unless noted otherwise. Install concealed conduits either in walls, slabs or above hung ceilings. In existing work where conduits can not be concealed in finished areas, surface metal raceways shall be used (Wiremold or conduit at Contracting Officer’s discretion).

1. Mechanically fasten together metal conduits, enclosures, and raceways for conductors to form continuous electrical conductor. Connect to electrical boxes, fittings and cabinets to provide electrical continuity and firm mechanical assembly.

2. Avoid use of dissimilar metals throughout system to eliminate possibility of electrolysis. Where dissimilar metals are in contact, coat surfaces with corrosion inhibiting compound before assembling.

3. Install miscellaneous fittings such as reducers, chase nipples, 3-piece unions, split couplings, and plugs that have been specifically designed and manufactured for their particular application. Install expansion fittings in raceways every 200-feet linear run or wherever structural expansion joints are crossed.

4. Use roughing-in dimensions of electrically operated unit furnished by supplier. Set conduit and boxes for connection to units only after receiving review of dimensions and after checking location with other trades.

B. Conduit Installation:

1. Use rigid steel heavy-wall zinc-coated conduit in spaces where exposed below 4-feet-0-inch height in Mechanical Equipment Rooms, Electrical Equipment Rooms, Boiler Rooms, Penthouses and in service splines. Other areas include warehouse spaces where exposed below 18-feet-0-inch height, on floors of crawl spaces, wet locations, and locations subject to mechanical injury.

2. Where acceptable to all authorities having jurisdiction, intermediate metal conduit may be used in lieu of rigid steel heavy-wall conduit in non-hazardous locations when in compliance with

NEC.

3. Use steel zinc-coated EMT for raceway systems except as specifically specified previously, where not allowed by NEC or noted on drawings. Additionally EMT shall not be acceptable below grade, in or under slabs on grade, or in wet locations.

4. Use flexible conduit in movable partitions and from outlet boxes to devices installed in accessible ceiling tiles. Arrange flexible conduit to allow removal of ceiling tile with installed device without dismantling of connected raceway systems. Use flexible conduit for final 24-

26 05 33-4 (Repair AHU 1096C E-Wing, B500) inches of connection to motors, or control items subject to movement or vibration. The maximum length for flexible conduit shall not exceed 6-feet.

C. Install pull wires in empty raceways. Use No. 14 AWG zinc-coated steel or monofilament plastic line having not less than 200 lb tensile strength. Leave not less than 12-inches of slack at each end of the pull wire.

D. Cut conduits straight, properly ream, and cut threads for heavy wall conduit deep and clean. Use temporary closures to prevent foreign matter from entering raceways.

E. Field-bend conduit with benders designed for purpose so as not to distort nor vary internal diameter.

F. Size conduits to meet NEC requirements and as shown on drawings or specified herein.

G. Fasten rigid conduit terminations in sheet metal enclosures with locknuts inside and outside enclosure or with threadless rigid box connectors and terminate with bushing.

H. Conduit terminations in wet locations shall be of the threaded hub type or other sealing type fittings UL

Listed for use in wet locations.

I. Conduits are not to cross vertical or horizontal openings such as pipe shafts, elevator shafts, ventilating duct openings, etc.

J. Keep conduits a minimum distance of 6-inches from parallel runs of flues, hot water pipes or other sources of heat. Wherever possible, install horizontal raceway runs above water and steam piping.

K. Conduit shall be properly supported as specified herein and as required by NEC. Attach raceways directly to building structure (structural wood, structural concrete, or steel red iron), or to unistrut trapeze supported directly from building structure with 3/8-inch minimum threaded rods. Wire type supports and click-type hangers shall not be allowed. Do not attach to roof decking.

L. Support riser conduit at each floor level with clamp hangers.

M. Use of running threads at conduit joints and terminations is prohibited. Where required, use 3-piece union or split coupling.

N. Complete installation of electrical raceways before starting installation of cables/wires within raceways.

O. Install raceway sealing fittings in accordance with the manufacturer's written instructions. Locate fittings at suitable, approved, accessible locations and fill them with UL Listed sealing compound. For concealed raceways, install each fitting in a flush steel box with a blank cover plate having a finish similar to that of adjacent plates or surfaces. Install raceway sealing fittings at the following points and elsewhere as indicated:

1. Where conduits enter or leave hazardous locations.

2. Where conduits pass from warm locations to cold locations, such as the boundaries of refrigerated spaces, built-up air handlers, and air-conditioned spaces.

3. Where required by the NEC.

P. Openings around electrical penetrations through fire-resistant-rated walls, partitions, floors or ceilings shall be firestopped using approved methods to maintain the fire resistance rating.

26 05 33-5 (Repair AHU 1096C E-Wing, B500)

Q. Provide sleeves for conduits passing through foundation or other load bearing walls.

R. All conduits extending through the exterior walls of a building in areas below grade shall be provided with a hydrostatic seal such as Link Seal or equal.

S. Concealed Conduits:

1. Conduits in finished areas shall be installed concealed.

T. Install conduits as not to damage or run through structural members. Avoid horizontal or cross runs in building partitions or side walls.

U. Exposed Conduits:

1. In unfinished areas such as Janitor Closets, Storage, Mechanical Equipment Rooms, etc., conduit may be run exposed. In finished areas with exposed structure, surface raceway may be run exposed (Wiremold or surface conduit at Contracting Officer’s discretion). Prior permission shall be first obtained from the Contracting Officer. All exposed conduit or surface metal raceways shall be installed in a neat manner following the building lines. Horizontal runs shall be close to the ceiling and shall be installed above mechanical piping as much as possible. Multiple hung conduits shall be strapped to the channel to hold it in place.

2. Install exposed conduits and extensions from concealed conduit systems neatly, parallel with or at right angles to walls of building.

3. Install exposed conduit work as not to interfere with ceiling inserts, lights or ventilation ducts or outlets.

4. Support exposed conduits by use of hangers or clamps. Attach raceways directly to building structure (structural wood, structural concrete, or steel red iron), or to unistrut trapeze supported directly from building structure with 3/8-inch minimum threaded rods. Wire type supports and click-type hangers shall not be allowed. Do not attach to roof decking. Support conduits on each side of bends and on spacing not to exceed following: Up to 1-inch: 6-feet-0-inch; 1-1/4-inch and over: 8-feet-0-inch.

5. Run conduits for outlets on waterproof walls exposed. Set anchors for supporting conduit on waterproof wall in waterproof cement.

6. Above requirements for exposed conduits also apply to conduits installed in space above hung ceilings, and in crawl spaces except that spacing of supports for conduits up to 1-inch shall not exceed 8-feet-0-inch.

V. Conduit Fittings:

1. Construct locknuts for securing conduit to metal enclosure with sharp edge for digging into metal, and ridged outside circumference for proper fastening.

2. Plastic insulating bushings for terminating rigid conduits smaller than 1-1/4-inch are to have ribbed sides, with smooth upper edges to prevent injury to cable insulation.

3. Install metallic insulated type bushings for terminating rigid conduits 1-1/4-inch and larger.

Bushings are to have flared bottom and ribbed sides. Upper edge to have phenolic insulating ring molded into bushing.

26 05 33-6 (Repair AHU 1096C E-Wing, B500)

4. Miscellaneous fittings such as reducers, chase nipples, 3-piece unions, split couplings and plugs to be specifically designed for their particular application.

26 05 34-1 (Repair AHU 1096C E-Wing, B500)

SECTION 26 05 34

ELECTRICAL BOXES AND FITTINGS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions, apply

A. Extent of electrical box and associated fitting work is indicated by drawings.

B. Types of electrical boxes and fittings in this section include the following:

1. Outlet boxes.

2. Junction boxes.

3. Pull boxes.

4. Bushings.

5. Locknuts.

6. Knockout closures.

2.1 FABRICATED MATERIALS

A. Outlet Boxes: Conform to UL 514A, "Metallic Outlet Boxes, Electrical," and UL 514B, "Fittings for

Conduit and Outlet Boxes." Boxes shall be of type, shape, size and depth to suit each location and application.

1. Conform to NEMA OS 1, "Sheet Steel Outlet Boxes, Device Boxes, Covers and Box

Supports." Boxes shall be sheet steel with stamped knockouts, threaded screw holes and accessories suitable for each location including mounting brackets and straps, cable clamps, exterior rings and fixture studs.

B. Raintight Outlet Boxes: Provide corrosion-resistant cast-metal raintight outlet wiring boxes, of types, shapes and sizes, including depth of boxes, with threaded conduit holes for fastening electrical conduit, cast-metal face plates with spring-hinged watertight caps suitably configured for each application, including face plate gaskets and corrosion-resistant plugs and fasteners.

C. Junction and Pull Boxes: Provide galvanized code-gage sheet steel junction and pull boxes, with screw-on covers; of types, shapes and sizes, to suit each respective location and installation; with welded seams and equipped with steel nuts, bolts, screws and washers.

D. Bushings, Knockout Closures and Locknuts: Provide corrosion-resistant box knockout closures, conduit locknuts and conduit bushings, offset connectors, of types and sizes, to suit respective installation requirements and applications.

26 05 34-2 (Repair AHU 1096C E-Wing, B500)

3.1 INSTALLATION OF ELECTRICAL BOXES AND FITTINGS

A. General: Install electrical boxes and fittings as indicated, in accordance with manufacturer's written instructions, applicable requirements of NEC and NECA's "Standard of Installation" and in accordance with recognized industry practices to fulfill project requirements.

B. Surface mounted device boxes in unfinished areas or at ceilings of finished areas with exposed structure shall be a minimum of 4-inch square knockout type. Surface mounted boxes in finished and exterior areas, shall be cast metal, threaded hub similar to Crouse Hinds "FS" or "FD" condulet box.

C. Coordinate installation of electrical boxes and fittings with wire/cable, wiring devices and raceway installation work.

D. Provide weathertight box assemblies for interior and exterior locations exposed to weather or moisture.

E. Provide knockout closures to cap unused knockout holes where blanks have been removed.

F. Install electrical boxes in those locations which ensure ready accessibility to enclosed electrical wiring.

Junction boxes shall not be installed above non-accessible ceilings.

G. Avoid installing boxes back-to-back in walls. Provide not less than 24-inch separation.

H. Avoid installing aluminum products in concrete.

I. Position recessed outlet boxes accurately to allow for surface finish thickness.

J. Avoid using round boxes where conduit must enter box through side of box, which would result in difficult and insecure connections when fastened with locknut or bushing on rounded surfaces.

K. Fasten electrical boxes firmly and rigidly to substrates or structural surfaces to which attached or solidly embed electrical boxes in concrete or masonry. Box support shall be independent of conduit.

L. Provide electrical connections for installed boxes.

M. Subsequent to installation of boxes, protect boxes from construction debris and damage.

3.2 POSITION OF OUTLETS

A. The Electrical Contractor shall coordinate prior to rough-in of outlets and shall set boxes to avoid interference with equipment installation in walls or ceilings.

B. Outlets shall be centered with respect to paneling, trim, furring, etc. Outlets improperly located shall be corrected at Contractor's expenses. Outlets shall be set plumb, secured firmly in place with face of box or plaster ring extending to finished surface or wall, ceiling or floor as the case may be.

C. Washers or bushings shall be installed between recessed box and device strap to make a flush rigid installation of the device installed.

26 05 53-1 (Repair AHU 1096C E-Wing, B500)

SECTION 26 05 53

ELECTRICAL IDENTIFICATION

A. Drawings and general provisions of Contract, including General and Supplementary Conditions, apply

A. Extent of electrical identification is indicated by drawings.

B. Types of electrical identification specified in this section include the following:

1. Electrical power, control, and communication conductors.

2. Operational instructions and warnings.

3. Equipment/system identification signs.

2.1 ELECTRICAL IDENTIFICATION MATERIALS

A. General: Except as otherwise indicated, provide manufacturer's standard products of categories and types required for each application. Where more than one (1) single type is specified for an application, selection is Installer's option, but provide single selection for each application.

B. Engraved Plastic-Laminate Signs:

1. General: Provide engraving stock melamine plastic laminate, complying with FS L-P-387, in sizes and thicknesses indicated, engraved with engraver's standard letter style of sizes and wording indicated, black face and white core (letter color) except as otherwise indicated, punched for mechanical fastening except where adhesive mounting is necessary because of substrate.

a. Thickness: 1/16-inch, for units up to 20 sq. in. or 8-inch length; 1/8-inch for larger units.

b. Fasteners: Self-tapping stainless steel screws, except contact-type permanent adhesive where screws cannot or should not penetrate substrate.

2.2 LETTERING AND GRAPHICS

A. General: Coordinate…