addendum number 4 - sonoma county water agency questions received as of issue date of this addendum...

Contract N

.

o. 0-80-7 #2 404 Aviation Gates

Addendum Number 4 00914 - 1

SECTION 00914

ADDENDUM NUMBER 4

Issued: June 23, 2017

404 Aviation Boulevard Parking Lot Gates

FROM: Sonoma County Water Agency 404 Aviation Boulevard Santa Rosa, CA 95403-9019

TO: Prospective Bidders

This Addendum forms a part of and modifies the Project Manual dated May 2017. Bidder shall acknowledge receipt of this Addendum in the space provided in Section 00400 (Bid Form).

Modified text is indicated as follows: Double-underline designates text to be inserted; strikeout designates text to be deleted.

Addendum Number 4 consists of 22 pages (size 8 ½” x 11”) and 0 revised Drawings.

I. General Changes

A. No changes.

II. Changes to Prior Addenda

A. No changes.

III. Changes to Introductory Information and Bidding Requirements

A. Section 00010 (Table of Contents)1. Division 16- Electrical, as follows:

Section Title 16050 Basic Electrical Materials and Methods 16065 Grounding 16125 Wire and Cables 16130 Raceway and Boxes 16135 Exterior Underground 16482 Unmetered Power Pedestal Assembly

IV. Changes to Contracting Requirements

A. No changes.

404 Aviation Gates Contract No. 0-80-7 #2

00914 - 2 Addendum Number 4

V. Changes to Conditions of the Contract

A. No changes.

VI. Changes to Specifications

A. Section 01750 (Starting and Adjusting): 1. Add the following as Paragraph 3.1A.6: Remove unmetered power assembly fronts for

inspection by Owner. 2. Add the following as Paragraph 3.1A.7: Apply touch-up paint to repair scratches and

other touch-up marks. 3. Add the following as Paragraph 3.1B.7: Test installed wire with a 500 volt megger after

installation and prior to connection. 4. Add the following as Paragraph 3.1B.8: Provide mandrel test results to Owner,

including but not limited to length of pulling tape, tension, conduit diameter, and mandrel diameter.

B. Add Section 16050 (Basic Electrical Materials and Methods) to Division 16, attached. C. Add Section 16065 (Grounding) to Division 16, attached. D. Add Section 16125 (Wire and Cables) to Division 16, attached. E. Add Section 16135 (Exterior Underground) to Division 16, attached. F. Add Section 16482 (Unmetered Power Pedestal Assembly) to Division 16, attached.

VII. Changes to Drawings

A. No changes.

VIII. Question(s)/Answer(s)

No questions received as of issue date of this Addendum Number 4.

For Bidders’ convenience, Owner may include citations to specific areas of the Contract Documents in answers to Bidder questions; however, such citations may not represent an exhaustive listing of resources pertinent to the matters presented by the underlying question. Information provided by Owner in response to Bidder questions shall not relieve Bidders of their responsibility to examine the Contract Documents and Addenda in their entirety.

END OF SECTION

Contract No.0-80-7 #2 404 Aviation Gates

Basic Electrical Materials and Methods 16050 - 1

SECTION 16050

BASIC ELECTRICAL MATERIALS AND METHODS

PART 1 GENERAL

1.1 REFERENCES

A. ANSI C2 National Electrical Safety Code B. ANSI Z535.1 Safety Color Code C. ANSI Z535.2 Environmental and Facility Safety Signs D. ANSI Z535.3 Criteria for Safety Symbols E. ANSI Z535.4 Product Safety Signs and Labels F. NFPA 70 National Electrical Code (NEC) G. OSHA 1910.145 Specification for Accident Prevention Signs and Tags

1.2 SUBMITTALS

A. Shop Drawings: 1. General requirements:

a. Provide manufacturer’s technical information on products to be used, including product descriptive bulleting.

b. Include data sheets that include43 manufacturer’s name and product model number. 1) Clearly identify all optional accessories.

c. Acknowledgement that products are UL or ETL listed or are constructed utilizing UL or ETL recognized components.

d. Manufacturer’s deliver, storage, handling and installation instructions. e. Product installation details. f. See individual specification section for any additional requirements.

B. Installation, Operation, and Maintenance Manuals: 1. See specific material specification for Installation, Operation and Maintenance Manuals

documents requirements. C. Closeout Submittals

1. For all equipment: Bill of Materials

1.3 MAINTENANCE

A. Extra Materials: 1. Furnish spare parts prior to startup. Spare parts shall be sealed in plastic bags and

delivered to the Site in a heavy-duty plastic storage box. Include list and quantity of parts provided.

2. Furnish equipment and tools necessary to maintain, program, and calibrateequipment.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Provide components of a similar type by one manufacturer.

2.2 MATERIALS

A. Electrical Equipment Supports: 1. Approved manufacturers:


16050 Basic Electrical Materials and Methods

a. Unistrut Building Systems. b. B-Line. c. Globe Strut. d. Or Approved Equal.

B. Nameplates for labeling equipment enclosures and equipment that is visible with the enclosure door closed: 1. Approved manufacturers catalog numbers:

a. W. H. Brady Co., #B-1. b. Seton, “Setonply”. c. Or Approved Equal.

2. Materials: Phenolic, 2-ply engraved. 3. Size:

a. Surface: As required for the text. b. Thickness: 1/16 IN.

4. Fabrication: a. Two layer laminated. b. Legend engraved through top lamination into bottom lamination. c. Drilled holes in each corner, for screw mounting.

5. Colors: Black top surface, white core, unless otherwise indicated. 6. Fasteners: Self-tapping stainless steel screws.

C. Nameplates for labeling components inside equipment enclosures: 1. Approved manufacturers catalog numbers:

a. W. H. Brady Co., “Industrial Strength Tape” #42018. b. Or Approved Equal.

2. Materials: vinyl tape or vinyl cloth with printable topcoat. 3. Colors: White background, black printing.

D. Wire markers for control panels, electrical gear, pull and junction boxes: 1. Material: vinyl or polyester tape.

a. Approved manufacturer's catalog numbers: 1) W. H. Brady Co., Indoor/Outdoor Vinyl Tape, B-580. 2) Or Approved Equal.

2. Material: Heat shrinkable polyolefin: a. Approved manufacturer's catalog numbers:

1) Seton, Welded Wire Marking Sleeves. 2) Or Approved Equal

3. Colors: White background, black printing. E. Wire markers for manholes, handholes and exterior pad mounted electrical gear:

1. Material: Aluminum or stainless steel. a. Approved manufacturer's catalog numbers:

1) Panduit META-X or META54-X. 2) Or Approved Equal.

2. Legend: Embossed. 3. Fasteners: Nylon, urethane or polypropylene strap.

F. Safety Signs: 1. Approved manufacturers catalog numbers:

a. W. H. Brady Co., #B-302 or #B-120. b. Or Approved Equal.

2. Materials, size and fabrication:



a. For indoor use: Polyester or vinyl, surface area as required by the text, 4 mil minimum thickness, self-adhesive.

b. For outdoor use and on entrances to electrical rooms or stations: Fiberglass or coated plastic, surface area as required by the text, minimum area 7 x 10 IN, 60 mil thickness, drilled holes for screw mounting.

3. Minimum letter size on indoor signs, 3/16IN. 4. Maximize the letter size on outdoor signs to sufficiently fill the printable area on the

sign. 5. Standards: ASME/ANSI Z535.1, Z535.2, Z535.3 and Z535.4, OSHA 1910.145

G. Provide equipment and materials suitable for the type of locations in which they are to be located.

2.3 MISCELLANEOUS

A. Terminal Blocks: 1. Unless otherwise specified, terminal blocks shall be panhead strap screw type.

Terminals shall be provided with integral marking strips which shall be permanently identified with the connecting wire numbers as shown on the plans. Terminal blocks for power circuits shall be rated not less than 600 volts AC. Terminal blocks for control circuits and signal circuits shall be rated not less than 20 amps and shall not be rated less than 300 volts AC. Terminals shall be tin-plated. Insulating material shall be nylon. Terminal blocks shall be provided with NFT screws with slotted heads to accept as a minimum 3/16-inch screw driver blades.

2. At each starter, electrical enclosure, control panel, and switchboard, terminate alarm, control, and any other wiring at indicated numbered terminal blocks.

PART 3 EXECUTION

3.1 INSTALLATION

A. Install equipment in accordance with the requirements of: 1. NFPA 70 (NEC). 2. ANSI C2. 3. The manufacturer’s instructions.

B. Do not use equipment that exceed dimensions or reduce clearances as required by the NFPA 70.

C. Install equipment plumbed, square and true with construction features and securely fastened.

D. Install electrical equipment, including pull and junction boxes, minimum of 6 IN from process, gas, air and water piping and equipment.

E. Install equipment so it is readily accessible for operation and maintenance, is not blocked or concealed and does not interfere with normal operating and maintenance requirements of other equipment. Owner reserves the right to require minor changes in location of equipment, prior to roughing in, without incurring any additional costs or charges. 1. Avoid interference with structural members, door swings, piping, and building

structure. 2. Do not install electrical equipment such that it interferes with normal maintenance

requirements of other equipment. F. Provide electrical equipment support system per the following area designations:

1. Dry areas:


16050 Basic Electrical Materials and Methods

a. Galvanized system consisting of: Galvanized steel channels and fittings, nuts and hardware and conduit clamps.

2. Wet and corrosive areas: a. Stainless steel system consisting of: Stainless steel channels and fittings, nuts and

hardware and conduit clamps. b. PVC coated steel system consisting of: PVC coated steel channels and fittings and

conduit clamps with stainless steel nuts and hardware. G. Provide necessary anchoring devices and supports rated for the equipment load based on

dimensions and weights verified from approved submittals, or as recommended by the manufacturer. Allow for expansion. 1. Do not cut, or weld to, building structural members. 2. Do not mount safety switches or other equipment to equipment enclosures, unless

enclosure mounting surface is properly braced to accept mounting of external equipment.

H. Provide corrosion resistant spacers to maintain 1/4 IN separation between equipment and mounting surface in Wet areas, on below grade walls and on walls of liquid containment or processing areas such as Clarifiers, Digesters, Reservoirs, etc.

I. Do not place equipment fabricated from aluminum in direct contact with earth or concrete. J. Screen or seal conduit openings into equipment to prevent the entrance of rodents and

insects. K. Do not use materials that may cause the walls or roof of a building to discolor or rust. L. Tag equipment enclosures and components that are visible with the enclosure door closed

in accordance with the following: 1. Use equipment name and number indicated on the Drawings. 2. Panelboards and transformers:

a. Equipment tag lettering: 1) Height: 3/8 IN minimum. 2) Equipment name (e.g., "PANELBOARD LP101" or "TRANSFORMER T101"). 3) Source of power (e.g., "FED FROM MCC401 LOCATED IN ROOM xxx").

M. Tag components inside equipment enclosures in accordance with the following: 1. Components including, but not limited to, circuit breakers, fuses, control power

transformers, relays, contactors, and timers. 2. Lettering:

a. Height: 3/16 IN minimum. b. Description or function of component (e.g., "M-101, CR-101 or TR-101").

N. Tag wires with wire markers in control panels and in pull or junction boxes, handholes and manholes where multiple circuits exist. 1. Tag wire at both ends. 2. Lettering:

a. Height: 1/8 IN minimum. b. Circuit number or wire number as scheduled on the Drawings or as furnished with

the equipment. O. Tag grounding conductors associated with grounding electrode system in accordance with

the following: 1. Lettering:

a. Height: 1/8 IN minimum. b. Function of conductor (e.g., "MAIN BONDING JUMPER", "TO GROUND RING",

"TO MAIN WATER PIPE").



P. Install Safety Signs as indicated in the following: 1. Legend in accordance with the following tabulation:

a. Equipment enclosures, cable tray and wireway where 120 V AC or higher and 50 V DC and higher exist : In accordance with OSHA Danger Sign requirements, HIGH VOLTAGE (define voltage, example 480 V AC) AUTHORIZED PERSONNEL ONLY.

Q. Equipment shall be located and installed so that it will be readily accessible for operation and maintenance

3.2 FIELD QUALITY CONTROL

A. Verify exact rough-in location and dimensions for connection to electrified equipment. B. Replace equipment and systems found inoperative or defective and re-test. C. Cleaning:

1. Clean up Work areas and remove construction debris. D. Apply touch-up paint as required to repair scratches and other marks. E. Replace nameplates damaged during installation.

3.3 DEMONSTRATION

A. Provide demonstration of equipment operation and recommended training and routine tests of electrical equipment, including schedule of tests.

B. Allow 4 hours for demonstration and training.

3.4 SEISMIC CRITERIA

A. Provide necessary anchoring devices and supports for separately mounted or anchored electrical equipment and appurtenance facilities. 1. Conform to requirements of the CBC, both for vertical and horizontal forces for seismic

Zone 4 loading. 2. Use supports as indicated and as specified.

a. Where not indicated or specified, use supports and anchoring devices rated for the equipment load and as recommended by the manufacturer.

3. Supports and anchoring devices shall be rated and sized based on dimensions and weights after equipment submittals are satisfactorily reviewed.

4. Hardware shall be malleable type, corrosion resistant, and shall be supported by heavily plated machine screws or brass, bronze, or stainless steel bolts.

B. Do not cut, or weld to, building structural members.

3.5 CLEANING

A. After installation of wiring and again after commissioning testing, clean panelboards, switchgear, transformer, equipment enclosures, and other electrical equipment of dust, dirt, grease, paint, or other marks.

3.6 PROTECTION

A. Following installation, protect materials and equipment from corrosion, physical damage, and the effects of moisture on insulation. When equipment intended for indoor installation is installed at Contractor’s convenience in areas where it is subject to dampness, moisture, dirt, or other adverse atmosphere until completion of construction; ensure that adequate protection from these atmospheres is provided that is acceptable to Owner. Cap conduit runs during construction and install pull rope.

END OF SECTION

Contract No. 0-80-7 #2 404 Aviation Gates

Grounding 16065 - 1

SECTION 16065

GROUNDING

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes: 1. Material and installation requirements for grounding system(s).

B. Related Sections:

1. Section 16125 2. Section 16130

Wire and Cable Raceways and Boxes

1.2 REFERENCES

A. IEEE 837 Standard for Qualifying Permanent Connections Used in Substation Grounding

B. NFPA 70 National Electrical Code (NEC), Article 250, Grounding and Bonding

C. UL 467 Grounding and Bonding Equipment

1.3 SUBMITTALS

A. Product data. 1. Wires and Cables 2. Ground rods 3. Grounding clamps, terminals and connectors.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable: 1. Ground rods and bars, and grounding clamps, connectors and terminals:

a. Burndy. b. Joslyn. c. Thomas & Betts (Blackburn). d. Or Approved Equal.

2.2 COMPONENTS

A. Wire and Cable: 1. Insulated conductors: Color coded green, THWN-2 per Section 16125 (Wire and Cable).

B. Conduit: As specified in Section 16130 (Raceway and Boxes). C. Ground Rods:

1. Minimum 1/2 IN x 8 FT.


16065 - 2 Grounding

2. Copperclad: a. Heavy uniform coating of electrolytic copper molecularly bonded to a rigid steel

core. b. Corrosion resistant bond between the copper and steel. c. Hard drawn for a scar-resistant surface.

D. Grounding Clamps, Connectors and Terminals: 1. Mechanical type:

a. Standards: UL 467. b. High copper alloy content.

2. Compression type for interior locations: a. Standards: UL 467. b. High copper alloy content. c. Non-reversible. d. Terminals for connection to bus bars shall have two bolt holes.

3. Compression type suitable for direct burial in earth or concrete: a. Standards: UL 467, IEEE 837. b. High copper alloy content. c. Non-reversible.

PART 3 EXECUTION

3.1 INSTALLATION

A. General: 1. Install products in accordance with manufacturer’s instructions. 2. Size grounding conductors 3. Remove paint, rust, or other non-conducting material from contact surfaces before

making ground connections. 4. Do not splice grounding conductors except at ground rods. 5. Install ground rods and grounding conductors in undisturbed, firm soil.

a. Provide excavation required for installation of ground rods and ground conductors. b. Use driving studs or other suitable means to prevent damage to rods. c. Provide sufficient slack in grounding conductors to prevent conductor breakage

during backfill or due to ground movement. d. Backfill excavation completely, thoroughly tamping to provide good contact

between backfill materials and ground rods and conductors. B. Raceway Bonding/Grounding:

1. Metallic conduit shall be installed so that it is electrically continuous. 2. Conduits shall contain a grounding conductor with insulation identical to the phase

conductors, unless otherwise indicated. 3. NFPA 70 required grounding bushings shall be of the insulating type. 4. Bond conduit, at entrance and exit of equipment, to the equipment ground bus or lug. 5. Provide bonding jumpers if conduits are installed in concentric knockouts. 6. Make metallic raceway fittings and grounding clamps tight to ensure equipment

grounding system will operate continuously at ground potential to provide low impedance current path for proper operation of overcurrent devices during possible ground fault conditions.

7. Ensure ground continuity is continuous throughout the entire Project.


Grounding 16065 - 3

C. Equipment Grounding: 1. Utilization equipment shall be grounded with an equipment ground conductor.


A. Leave grounding system uncovered until observed by Owner.

END OF SECTION


Wire and Cable 16125 - 1

SECTION 16125

WIRE AND CABLE

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes: 1. Material and installation requirements for:

a. Building wire. b. Wire connectors. c. Insulating tape.

1.2 REFERENCES

A. ICEA Method 1, Table K-2

Insulated Cable Engineers Association (ICEA) Color Sequence for Industrial Conductor Identification

B. NFPA 70 National Electrical Code (NEC) C. UL 44 Standard for Safety Thermoset-Insulated Wires and Cables D. UL 83 Standard for Safety Thermoplastic-Insulated Wires and

Cables E. UL 467 Standard for Safety Grounding and Bonding Equipment F. UL 486A Standard for Safety Wire Connectors and Soldering Lugs for

use with Copper Conductors G. UL 486C Standard for Safety Splicing Wire Connections H. UL 510 Standard for Safety Polyvinyl Chloride, Polyethylene and

Rubber Insulating Tape I. UL 1581 Standard for Safety Reference Standard for Electrical Wires,

Cables, and Flexible Cords J. UL 2250 Standard for Safety Instrumentation Tray Cable

1.3 DEFINITIONS

A. Cable: Multiple conductor, insulated, with outer sheath containing either building wire or instrumentation wire.

B. Building wire: Single conductor, insulated, with or without outer jacket depending upon

type.

1.4 SUBMITTALS

A. Product Data B. Report of wire megger testing results.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:


16125 - 2 Wire and Cable

1. Building wire: a. American Insulated Wire Corporation. b. General Cable. c. Southwire Company. d. Or Approved Equal.

2. Wire connectors: a. Burndy Corporation. b. Ilsco. c. 3M Co d. Thomas and Betts e. Or Approved Equal.

3. Insulating and color coding tape: a. 3M Co. b. Or Approved Equal.

2.2 MANUFACTURED UNITS

A. Building wire: 1. Conductor shall be copper with 600 V rated insulation. 2. Conductors shall be stranded, except for conductors used in lighting and receptacle

circuits which may be stranded or solid. 3. Surface mark with manufacturer’s name or trademark, conductor size, insulation type,

and UL label. 4. Conform to NEMA/ICEA WC 70/S-95-658 and UL 83 for type THHN/THWN and

THHN/THWN-2 insulation B. Wire connectors:

1. Twist/screw on type: a. Insulated pressure or spring type solderless connector. b. 600 V rated. c. Ground conductors: Conform to UL 486C and/or UL 467 when required by local

codes. d. Phase and neutral conductors: Conform to UL 486C.

2. Compression and mechanical screw type: a. 600 V rated. b. Ground conductors: Conform to UL 467. c. Phase and neutral conductors: Conform to UL 486A.

3. Terminal block type: a. High density, screw-post barrier-type with white center marker strip. b. 600 V and ampere rating as required, for power circuits.

PART 3 EXECUTION

3.1 INSTALLATION

A. Permitted usage of insulation types: 1. Type THHN/THWN-2

a. Building wire. b. Building wire in conduit below grade.

B. Conductor size limitations:


Wire and Cable 16125 - 3

1. Feeder and branch power conductors shall not be smaller than No. 12 AWG unless otherwise indicated.

2. Control conductors shall not be smaller than No. 14 AWG unless otherwise indicated. 3. Instrumentation conductors shall not be smaller than No. 18 AWG unless otherwise

indicated. C. Color code all wiring as follows:

1. Building wire:

240 V, 208 V, 240/120 V,

208/120 V 480 V, 480/277 V Phase 1 Black Brown Phase 2 Red Orange Phase 3 Blue Yellow Neutral White White or Gray Ground Green Green

a. Conductors No. 6 AWG and smaller: Insulated phase, neutral and ground

conductors shall be identified by a continuous colored outer finish along its entire length.

b. Conductors larger than No. 6 AWG: 1) Insulated phase and neutral conductors shall be identified by one (1) of the

following methods: (a) Continuous colored outer finish along its entire length. (b) 3 IN of colored tape applied at the termination.

2) Insulated grounding conductor shall be identified by one (1) of the following methods: (a) Continuous green outer finish along its entire length. (b) Stripping the insulation from the entire exposed length. (c) Using green tape to cover the entire exposed length.

3) The color coding shall be applied at accessible locations, including but not limited to: Junction and pull boxes, wireways, manholes and handholes.

D. Splices and terminations for the following circuit types shall be made in the indicated enclosure type using the indicated method. 1. Feeder and branch power circuits:

a. Device outlet boxes: 1) Twist on type connectors.

b. Junction and pull boxes and wireways: 1) Twist on type connectors for use on No. 8 and smaller wire. 2) Compression, mechanical screw or terminal block or terminal strip type

connectors for use on No. 6 AWG and larger wire. c. Handholes:

1) Twist on type connectors pre-filled with epoxy for use on No. 8 AWG and smaller wire.

2) Watertight compression or mechanical screw type connectors for use on No. 6 AWG and larger wire.

2. Non-insulated compression and mechanical screw type connectors shall be insulated with tape or hot or cold shrink type insulation to the insulation level of the conductors.


16125 - 4 Wire and Cable

E. Insulating Tape Usage: 1. For insulating connections of No. 8 AWG wire and smaller: 7 mil vinyl tape. 2. For insulating splices and taps of No. 6 AWG wire or larger: 10 mil vinyl tape. 3. For insulating connections made in cold weather or in outdoor locations: 8.5 mil, all-

weather vinyl tape. F. Color Coding Tape Usage: For color coding of conductors.


A. Wire to be tested with a 500 volt megger after installation and prior to connection. B. Replace any damaged wire or cable.

END OF SECTION


Exterior Underground 16135 - 1

SECTION 16135

EXTERIOR UNDERGROUND

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes: 1. Material and installation requirements for:

a. Pull Boxes. b. Underground conduits and ductbanks

B. Related Sections: 1. Section 16130 (Raceway and Boxes).

1.2 REFERENCES

A. AASHTO Standard Specifications for Highway Bridges B. Caltrans 19.3 Controlled Low Strength Material

1.3 DEFINITIONS

A. Controlled Density Fill (CDF) encased ductbank: An individual (single) or multiple conduit(s), arranged in one or more planes, encased in a common red controlled density fill (CDF) envelope.

1.4 SUBMITTALS

A. Product Data: 1. Precast pull box.

B. Shop Drawings: 1. Fabrication and layout drawings:

a. Dimensional drawings of each pull box indicating specified accessories and conduit entry locations.

C. Quality Assurance/Control Submittals: 1. Mandrel Test Results:

a. Results of each test, including but not limited to length of pulling tape, tension, conduit diameter, and mandrel diameter.

PART 2 PRODUCTS

2.1 UNDERGROUND CONDUIT AND ACCESSORIES

A. Control Density Fill: Colored red and comply with Caltrans Standard Specification 19-3. B. Conduit: See Section 16130 (Raceway and Boxes). C. Duct Spacers and Supports:

1. High density polyethylene or high impact polystyrene. 2. Interlocking. 3. Accessories, as required:

a. Hold down bars. b. Ductbank strapping.


16135 - 2 Exterior Underground

PART 3 EXECUTION

3.1 GENERAL

A. Pull Box Locations: 1. Locations are to be approved by Owner prior to excavation and placement or

construction of pull boxes. B. Install products in accordance with manufacturer's instructions.

3.2 UNDERGROUND CONDUITS

A. General Installation Requirements: 1. Controlled Density Fill (CDF) encased ductbank. 2. Do not place CDF until conduits have been observed by Owner. 3. Provide conduit supports and spacers.

a. Place supports and spacers for rigid nonmetallic conduit on maximum centers as indicated for the following trade sizes: 1) 1 inch and less: 3 feet. 2) 1-1/4 to 3 inches: 5 feet. 3) 3-1/2 to 6 inches: 7 feet.

b. Place supports and spacers for rigid steel conduit on maximum centers as indicated for the following trade sizes: 1) 1 inch and less: 10 feet. 2) 1-1/4 to 2-1/2 inches: 14 feet. 3) 3 inches and larger: 20 feet.

c. Securely anchor conduits to supports and spacers to prevent movement during placement of concrete or soil.

4. Stagger conduit joints at intervals of 6 inches vertically. 5. Field cuts requiring tapers shall be made with the proper tools and shall match factory

tapers. 6. After the conduit run has been completed:

a. Check for conduit interior integrity and remove moisture and debris from conduit before wire is pulled into place.

b. Prove joint integrity and test for out-of-round duct by pulling a test mandrel through each conduit. Test mandrel: 1) Length: Not less than 12 inches 2) Diameter: Approximately 1/4 inch less than the inside diameter of the conduit.

c. Clean the conduit by pulling a heavy duty wire brush mandrel followed by a rubber duct swab through each conduit.

d. For conduit runs, new and existing, pull mandrel with diameter nominally 1/4 inch smaller than the interior of the conduit, to remove obstructions.

e. Pull mandrel through underground conduit runs after soil compaction, paving etc. is complete and before wire is pulled.

f. Verify and document that the mandrel is not scratched after being pulled through the conduit, indicating conduit damage.

g. Mandrel pulls must be witnessed by Owner. h. If mandrel picks up excess moisture or debris, repeat mandrel pull until mandrel

shows no evidence of no excess moisture or debris. i. If mandrel exits the conduit and the mandrel shows conduit damage, repair the

conduit and repeat the mandrel pull test. j. Swab conduit by pulling a clean, tight-fitting rag through the conduit.


Exterior Underground 16135 - 3

k. Tightly plug ends of conduit with tapered wood plugs or plastic inserts until wire is pulled.

7. Pneumatic rodding may be used to draw in lead wire. a. Install a heavy nylon cord free of kinks and splices in unused new conduits. b. Extend cord 3 feet beyond ends of conduit.

8. Transition from PVC-80 conduit to rigid galvanized steel (RGS), per Section 16130 (Raceway and Boxes), prior to entering a structure or going above ground. a. Terminate steel conduits with insulated bushings.

9. Placement of conduits stubbing into pull boxes shall be located to allow for proper bending radiuses of the cables.

B. Controlled Density Fill (CDF) Encased Ductbank: 1. Ductbank system consists of conduits completely encased in minimum 2 inches of

Control Density Fill(CDF) and with separations between different cabling types as required in Section 16130 (Raceway and Boxes), or as indicated.

2. Install so that top of CDF encased duct, at any point: a. Is not less than 24 inches below grade. b. Is below pavement sub-grading.

3. Conduit supports shall provide a uniform minimum clearance of 2 inches between the bottom of the trench and the bottom row of conduit.

4. Conduit separators shall provide a uniform minimum clearance of 2 inches between conduits, or as required in Section 16130 (Raceway and Boxes) for different cabling types.

END OF SECTION


Unmetered Power Pedestal 16482 - 1

SECTION 16482

UNMETERED POWER PEDESTAL ASSEMBLY

PART 1 GENERAL

1.1 SUMMARY

A. Section Includes: 1. Basic requirements for exterior power pedestal with stepdown transformer and

distribution panel.

1.2 REFERENCES

A. NEC National Electrical Code B. NEC 110 Requirements for Electrical Installations

1.3 DEFINITIONS

A. Outdoor area: Exterior locations where the power pedestal is normally exposed to the weather and including below grade structures.

B. Shop fabricated: Manufactured or assembled panelboard for which a UL test procedure has not been established.

1.4 SUBMITTALS

A. Product Data: 1. Manufacturer's technical information on products to be used, including product

descriptive bulletin. 2. Data sheets that include manufacturer's name and product model number. 3. Optional accessories. 4. Acknowledge in written format that products are UL or ETL listed or are constructed

utilizing UL or ETL recognized components. 5. Manufacturer's delivery, storage, handling and installation instructions. 6. Product installation details. 7. Operations and Maintenance Manual

B. Shop Drawings: 1. Required for unmetered power pedestal Drawing:

a. Show main devices and lug sizes b. Branch circuit device sizes and arrangement, and identify available spaces c. Dimensions and construction d. Conduit entry/exit locations e. Mounting details f. Nameplate and legend g. Protective coating


16482 - 2 Unmetered Power Pedestal

h. Assembly ratings including: 1) Short-circuit rating 2) Voltage 3) Continuous current 4) Stepdown transformer rating.

C. Certifications: 1. Certification of the complete assembly per industry standard recommendations.

Certification shall include: a. Panelboard b. Transformer

2. Certified that assembly components are capable of withstanding the thermal and magnetic stress of a fault equal to the value as specified. Such rating shall be established by actual tests by the manufacturer on similar panelboard. This certification shall be permanently affixed to each component.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Packing, Shipping, Handling, and Unloading: 1. Protect assembly from damage.

B. Handle and store panelboards in accordance with Manufacturer's instructions, which shall be included with the shipment.

C. Acceptance at Site: 1. Provide two keys for each cabinet lock.

1.6 AREA DESIGNATIONS

A. Unless otherwise indicated, designation of an area shall determine the NEMA rating of the electrical equipment enclosures per NEC 110 for types of conduits and installation methods to be used in that area. 1. Outdoor areas:

a. Wet.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Tesco 24-000 Transformer Enclosure B. Or Approved Equal

2.2 COMPONENTS

A. Panelboards: 1. Where Underwriters Laboratories, Inc. (UL) test procedures have been established for

the product type, use UL or ETL Testing Laboratories (ETL) approved electrical panelboard and provide with the UL or ETL label.

2. Provide panelboards consisting of an assembly of branch circuits switching and protective devices (circuit breakers, switch and fuse units, or combination thereof) mounted inside a dead front enclosure.



a. Provide the number and size of these branch circuit devices as indicated. Locations of circuit breakers shall be as indicated.

B. Interiors: 1. Rigid removable assembly of copper bus bars and interchangeable bolted branch circuit

devices. 2. Bus bars sized in accordance with UL standards to limit temperature rise on any current

carrying part to a maximum of 65 degrees C above an ambient of 40 degrees C maximum.

3. Bus bars drilled to permit branch circuit devices of all sizes and number of poles to be interchangeable and installed in any spare space of sufficient size, without disturbing adjacent units; without removing main bus or branch circuit connectors and without machining, drilling, or tapping in the field.

4. Arrange bus in sequence or distributed phasing so that multipole circuit breaker can replace any group of single circuit breakers of the same size.

5. Full-size (100%-rated) insulated neutral bars shall be included for panelboards shown with neutral. Neutral busing shall have a suitable lug for each outgoing feeder requiring a neutral connection.

6. Provide ground bus in each panelboard. On 120/208 volt panelboards provide an additional isolated ground bus where required.

C. Front: 1. Doors must be provided on lighting and power panels. On switch and fuse panelboards

doors over overcurrent devices are not to be provided unless rated for same. 2. Heavy code gauge steel as required to maintain panel face flat. 3. Hold front closed with trim clamps. 4. Door of transformer must have a pistol grip 5. Door must have a lockable handle that operates a latching bar that holds the enclosure

in at least 2 places. 6. Enclosure must have a minimum NEMA rating of 3R. 7. Factory finished in medium gray enamel or two coats of air-drying lacquer over a rust

inhibitor. 8. Provide cylinder lock. All panels keyed alike. 9. Welded angle rest at the bottom of the door to facilitate cover installation. 10. Doors over 48 IN in height shall have auxiliary fasteners at top and bottom of door in

addition to lock and catch. D. Electrical Ratings:

1. Short circuit withstand ratings shall be as indicated on the Drawings. Panelboards shall be labeled with a UL short-circuit rating. Circuit breakers shall be fully-rated unless the drawings specifically indicate series rated. When series ratings are applied with integral or remote upstream devices, a label or manual shall be provided. It shall state the conditions of the UL series ratings including: a. Size and type of upstream device b. Branch devices that can be used c. UL series short-circuit rating.

2. Where indicated, provide panelboards having a "service entrance" Type UL label with neutrals factory bonded to frame or enclosure.

E. Transformer


16482 - 4 Unmetered Power Pedestal

1. Coils: a. Coil conductors to be continuous with terminations welded without auxiliary flux

material. b. Wind coils with copper or aluminum magnet wire, vacuum impregnated with non-

hydroscopic, thermosetting varnish. c. Coils to be protected with an outer layer of glass tape or similar quality insulation. d. Provide each layer with end-fillers or tie-downs to ensure maximum mechanical

strength. e. Brace tap terminations to magnet wire. f. Brace primary and secondary magnet wire directly to bus studs or lugs. g. Windings shall be continuous with no splices.

2. Core: a. Manufacture core from a high-grade, non-aging 29 gauge silicon steel with high

magnetic permeability, low hysteresis and eddy current losses. b. Keep magnetic flux densities well below saturation to allow for a minimum of 10

percent overvoltage excitation. c. Cut laminations with the direction of the grain and free from burrs. d. Laminations must be core plated or annealed and firmly butted.

3. The core laminations shall be clamped tightly and compressed to provide quiet operation and to prevent damage during shipment or rough handling.

F. Enclosures: 1. Provide lifting brackets on all sizes. 2. Ventilated openings shall be selected and provided such as to avoid accidental access to

live parts.

PART 3 EXECUTION

3.1 INSTALLATION

A. Mount unmetered power pedestal per manufacturers requirements. B. Neatly arrange branch circuit wires and tie together in each gutter with Thomas & Betts

nylon "Ty-Raps", or Approved Equal at minimum 4 inch intervals. C. Plug all knockouts removed and not utilized. D. Provide nameplate and fill out panel directory. E. Install assembly plumb, square and true with construction features and securely fastened. F. In general, conduit routing is not indicated.

1. Route conduits, including those indicated on one-line and control block diagrams, and home runs shown on the plans.

2. Conduit routings and stub-up locations that are indicated are approximate; exact routing to be as required for assembly furnished and field conditions.

G. Install assembly so it is readily accessible for operation and maintenance, is not blocked or concealed and does not interfere with normal operating and maintenance requirements of other equipment.

H. Screen or seal openings into assembly mounted outdoors to prevent the entrance of rodents and insects.

I. Identify electrical panelboard and components with identification nameplates.



3.2 RESTORATION

A. Touch up scratch marks or other imperfections with matching paint. B. Replace nameplates damaged during installation. C. Maintain the protective coating integrity of support structures and assembly enclosures.

1. Repair galvanized components utilizing a zinc rich paint. 2. Repair painted components utilizing touch up paint provided by or approved by the

manufacturer. 3. Repair surfaces which will be inaccessible after installation prior to installation. 4. See Section 16130 (Raceway and Boxes) for requirements for conduits and associated

accessories.

3.3 CLEANING

A. Vacuum clean of debris after installation and prior to contract closeout. B. Clean components.


A. Inspection: 1. Remove assembly fronts for inspection of the assembly interiors by Owner. 2. Panel fronts shall be removed when directed by Owner for inspection. Reinstall panel

fronts immediately after the inspections. B. Verify exact rough-in location and dimensions for connection to Owner’s main electrified

panelboard, C. Replace components and systems found inoperative or defective and re-test.

END OF SECTION