END OF SECTION
16010.01 GENERAL A. Description
1. This section includes materials, installation, and testing of the electrical system.
2. All work under this section is subject to the General Conditions and Special Provisions for the entire Contract.
3. Carefully examine all contract drawings and fit the work in each location without substantial alteration. Where departures are proposed because of field conditions or other causes, prepare and submit detailed drawings for acceptance.
B. Regulatory Agencies and Standards
1. Regulatory Agencies: Installations, materials, equipment, and workmanship shall conform to the provisions of the following agencies and codes:
a. National Electrical Code (NEC)
b. Occupational Safety and Health Act (OSHA).
c. Local authorities having lawful jurisdiction pertaining to the work required.
d. NFPA 820-2003 or latest version thereof.
e. Underwriter’s Laboratories Inc. (UL): Materials, appliances, equipment, and devices shall conform to the applicable UL standards. The label of, or listing by, UL is required wherever applicable.
2. Standards: Where referenced in these specifications or on the drawings, the publications and standards of the following organizations apply:
a. American Society of Testing and Materials (ASTM).
b. National Electrical Manufacturers Association (NEMA).
c. National Fire Protection Association (NFPA).
d. American National Standards Institute (ANSI).
e. Institute of Electrical and Electronics Engineers (IEEE).
f. Insulated Cable Engineers Association (ICEA).
C. Utility Company Requirements and Fees
1. The County has applied for electric service relocation by BGE. The County shall pay all BGE fees for relocation of the service and removal of the existing pole.
2. The Contractor shall coordinate with the County and BGE for relocation of the existing electric service and removal of the utility pole following installation of the 4” PVC conduit.
D. Submittals
1. Submit shop drawings in accordance with the General Provisions.
2. Submit operation and maintenance data for all items in accordance with the General Provisions 5.04.08.
3. As-built drawings shall be in accordance with Section 5.04.7 of the “General Provisions”.
16010.02 MATERIALS A. Materials
1. General
a. Similar materials and equipment shall be the product of a single manufacturer.
b. Provide only the products which are new, undamaged, and in the original cartons or containers.
c. Materials and equipment shall be the standard products of manufacturers regularly engaged in the production of such material and shall be the manufacturer's current design.
d. Where material or equipment is identified by proprietary name, model number and/or manufacturer, furnish the named item or equivalent thereof, subject to acceptance by the Engineer.
e. Substituted items or items other than those named shall be equal or better in quality and performance and must be suitable for the available space, required arrangement and application. Submit any and all data and samples necessary to determine the suitability of substituted items. Data and samples shall be as required by the engineer.
f. Substitution will not be permitted for specific items of material/equipment where specifically indicated.
g. Materials and equipment shall be suitable for storage, installation, and operation in an
ambient of 0
̊
C to 40̊
C except where more stringent conditions are stated in individual equipment specifications.h. Electrical equipment and panels shall be factory finished with manufacturer's standard primer and enamel topcoats, unless stated otherwise in the individual equipment specifications. Provide 1 pint of the equipment manufacturer's touchup paint per 500 square feet of painted surface for repair of damaged enamel topcoats.
i. Provide all supports, hangers, braces, attachments and foundations required for the work. Supports, hangers, braces and attachments shall be standard manufactured items of fiberglass-reinforced plastic (FRP) or stainless steel shapes and assemblies, ensuring no-rust construction.
j. Concrete equipment pads and foundations shall be not less than 4 inches high unless otherwise noted, and in general shall extend at least 4-inches beyond the equipment base unless otherwise noted. Provide wire-mesh reinforcement, chamfer exposed edges and corners and finish all exposed surfaces smooth. Concrete shall be minimum 3,000 psi test at 28 days.
k. All electrical panels, boxes, transformers, etc. which are wall-mounted both interior and exterior shall be installed on racks mounted on the walls to provide an air space behind the equipment. The rack shall consist of Kindorf channel, maximum 3/4-inch depth, or equal. Kindorf channel shall be FRP Aikenstrut or equal. All electrical equipment mounted on railings or similar structures shall be complete with framework backboards to provide air space behind. The framework shall be securely fastened to the railing or structure with corrosion resistance hardware. All supports in damp or corrosive areas shall be PVC coated. Typical mounting methods shall be approved by the Engineer prior to installation.
l. All conduit penetration through floor slabs or other fire rated walls shall be
complete with fire seals as manufactured by O.Z. Gedney "FIRE-STOP" or equal.
U.L. approved silicone foam system shall be acceptable where approved by the Engineer.
m. Indicator lights for MCC's, control panels and other enclosures shall be as specified in other sections and where shown in the drawings. Unless otherwise shown, indicator light colors shall follow the standards below:
Power Available – WHITE Run/ Start/ Unsafe – RED Off/Stop/ Safe – GREEN Failure/ Alarm/ Trip - AMBER 2. Hazardous Locations
a) Conform with NEC Articles 501 and 502 for areas identified as "Hazardous Areas"
on the drawings. All areas shall be classified based on NFPA 820-2003 or the latest version thereof.
b) Provide threaded cast boxes and fitting for junction boxes and pull boxes in Class I and Class II areas. Boxes and fittings shall conform with Class I, Groups A, B, C, and D and Class II, Groups E, F, and G requirements.
c) Fixture hangars for pendant mounted fixtures shall conform with Class I, Division I and Class II, Division I requirements.
d) Provide conduit seals in Class I, Division I location within 18-inches of each conduit entering an enclosure containing electrical devices except for hermetically sealed switches and receptacles. Provide a conduit seal for each conduit leaving the hazardous location.
e) Flexible connections to motors and other vibrating equipment in Class I, Division I locations shall be made with flexible fittings approved by Class I locations.
16010.03 EXECUTION
A. Storage and Protection of Equipment
1. All electrical equipment to be used in the construction shall be properly stored and protected against the elements. All equipment shall be stored under cover, and shall not be stored at the construction site on the ground, in mud, water, snow, rain, sleet or dust.
Large diameter cables may be stored on reels with weatherproof materials. Such weatherproof materials shall be heavy-duty, securely fastened and made impervious to the elements.
2. Convenient electrical construction materials such as building wire, outlet and junction boxes, wiring devices, conduit, lighting fixtures, fittings, etc., shall be stored in construction buildings, covered trailers or portable covered warehouses. Any equipment subject to damage or corrosion from excessive moisture shall be stored in dry, heated areas.
Any equipment containing plastic or material subject to damage caused by excessive heat or sunlight shall be stored to prevent such damage. This includes plastic ducts and lenses.
3. Switchgear, motor controllers, control centers, panelboards, breakers, emergency lighting, engine generators and supervisory equipment , if delivered to the construction site before the building is under cover, shall be warehoused and protected.
4. All equipment shall be covered and protected from the elements and other damage and shall be stored in a clean, dry, heated atmosphere, under cover.
5. All gear and equipment delivered to the construction site after the building is under cover shall be protected as described above and, in addition, shall be provided with auxiliary heat to prevent damage caused by condensation. The gear shall also be protected, against damage caused by installation of any building systems and equipment; or damage caused by carelessness of workmen who are installing equipment connected to or adjacent to the above electrical equipment.
6. Equipment damaged as a result of the above conditions shall be properly repaired at the Contractor's expense or shall be replaced at the Contractor's expense, if, in the opinion of
the Engineer the equipment has been damaged to such an extent it cannot operate properly after repairs are made.
7. All electrical enclosures exposed to construction damages such as paint spots, spackling or plaster spatter, grout splashes, waterproofing compound, tar spots or runs and pipe covering compound splashes, shall be completely covered and protected against damage.
8. In the event leakage into the building of any foreign material or fluid occurs or may occur, the Contractor shall take all steps as described above to protect any and all equipment.
B. Installation
1. The drawings indicate connections for typical equipment only. If the equipment furnished is different from what is shown, provide the modifications necessary for a safe and properly operating installation in accordance with the equipment manufacturer's recommendations.
2. The drawings diagrammatically indicate the desired location and arrangement of outlets, conduit runs, equipment, and other items. Field inspection shall determine exact locations based on physical size and arrangement of equipment, finished elevations, and obstructions.
3. Work or equipment not indicated or specified which is necessary for the complete and proper operation of the electrical systems shall be accomplished without additional cost to the County.
4. Review demolition methods with County's Representative prior to cutting or removing
existing architectural and/or structural items or equipment. Repair damage to match existing, and maintain the fire rating of the existing items affected by the work.
5. The Contractor shall do all excavating and backfilling necessary to install
underground electrical work included in this section of the work. He shall establish all lines and grades required for the proper location of the work and shall be responsible for the correctness thereof. Excavation and back fill shall be performed in accordance with the requirements specified in other sections of these specifications.
6. The Contractor shall carefully coordinate the installation of all subterranean electrical work with other utility systems both new and existing. Locations of pole bases, manholes, handholes and duct banks are shown as approximate. All such items shall be staked and utility crossings identified prior to installation. The actual staked layout shall be reviewed with the Engineer prior to the installation.
7. Arrange conduit, wiring, equipment, and other work generally as shown providing proper clearances and access.
8. The following mounting heights of the various electrical outlets and devices are to bottom of box or nearest course-line in masonry wall:
a) Switches 4’0” AFF
b) Receptable 1’6” AFF (unless otherwise noted)
c) Disconnect Switches 4’6” AFF (unless otherwise noted)
9. In general, the mounting heights listed above are applicable, however, field conditions may dictate changes. Where these special conditions occur, final mounting height shall be brought to the attention of the Engineer and his decision shall be given.
10. Coordinate the work to minimize penetration of waterproof construction, including roofs, exterior walls and interior waterproof construction. Where such penetrations are necessary, provide all necessary curbs, sleeves, shields, flashings, fittings and caulking to make the penetrations absolutely watertight.
11. Provide all cutting and patching necessary for the installation of the electrical work. Any damage done to the work already in place by reason of this work shall be repaired at the Contractor's expense by a qualified mechanic experienced in such work. Patching shall be uniform in appearance and shall match with the surrounding surface.
12. Do not cut structural members without approval by Structural Engineer.
13. Clean all surfaces prior to application of adhesives, coatings, paint, or other finishes.
14. Protect all finishes and restore any damaged finishes to their original condition.
15. Remove all construction markings and writing from exposed equipment, conduit and building surfaces.
C. Operation of Equipment
1. Adjust and test all equipment and systems in accordance with the manufacturer's instructions prior to initial operation. Do not operate equipment unless proper safety devices and controls are operational. Provide all maintenance and service for equipment which is operated during construction and protect the equipment.
2. Where specified or otherwise required, provide the services of the manufacturer’s factory-trained servicemen or technicians to start-up the equipment.
D. Testing and Adjustment
1. The Contractor shall note that certain of the other sections and Appendices of these
specifications require tests of various equipment. He shall make himself familiar with these requirements and where electrical controls are involved in any of these tests, he shall become a party to the test and furnish, as part of this contract, any services or materials needed to make any electrical performance tests required.
2. Perform all tests which are specified or required to demonstrate that the work is installed and operating properly. Where formal tests are required, give proper notices and perform all necessary preliminary tests to assure that the work is complete and ready for final test.
3. Adjust all systems, equipment and controls to operate in a safe, efficient and stable manner.
4. Provide circuits that are free from ground faults, short circuits and open circuits.
5. Other tests of a specific nature for special equipment shall be as specified under the respective equipment.
6. All loads shall be balanced evenly across phases. Balances shall be accomplished with an ammeter and all loads energized.
E. Identification and Signs
1. Mark each individual panelboard, motor controller, disconnect switch, timer, relay, and contactor to identify each item with its respective service or function. Provide nameplates with engraved lettering not less the 1/4-inch high. Use black-on-white laminated plastic, attached with rivets or stainless steel sheet metal screws. Do not use embossed plastic adhesive tape.
2. Panelboard indices shall be completed and accurately typed with appropriate circuit identification. Identification by means of marking pens, embossed plastic tape markers or other temporary methods will not be acceptable.
3. All circuits in handholes, manholes and junction boxes shall be identified as to point of origin and termination. Tagging of such circuits shall be permanent. Paper or tape tags are not acceptable.
F. Infrared Survey Testing 1. General
a. Conduct an infrared survey of major electrical and rotating equipment in accordance with these Specifications and Appendices. Readings shall be done with the equipment operating under loaded conditions. Motor starters shall be loaded at the full load ampere rating of the motor. All other equipment, unless indicated otherwise, shall be loaded at 80% of the overcurrent protective device rating ahead of the equipment. All equipment shall be loaded for a minimum of 30 minutes before scanning. A Load Bank, provided by the Contractor, shall be used when the connected equipment cannot provide the required load.
2. Equipment to be Tested
a. Motor Starters and Variable Frequency Drives.
b. Bus Bars, Bus Splices, Bus Connectors.
c. Main Breakers.
d. Motor Connections at Motor.
e. Lighting Panels, Transformers and other ancillary equipment (under normal station load).
f. Connections at Generator and Automatic Transfer Switch.
3. Infrared Scanning of Electrical Equipment a. Visual Inspection
i. Inspect for physical, electrical and mechanical condition and bus alignment.
b. Infrared Inspection
i. Perform a qualitative (Level I) infrared inspection on the equipment listed in Section 2 above. The infrared-scanning device used shall meet the requirements contained in Part d below.
ii. Provide a report indicating the following:
a) Location, equipment, date.
b) Problem area (location of “hot spot”).
c) Indicate temperature of “hot spot” and ambient temperature.
d) Indicate cause of heat rise, if known.
e) Indicate phase unbalance, if present.
f) List of areas scanned.
c. Test parameters
i. Infrared scanning equipment shall detect 1 degree C rise between subject area and reference at 30 degrees C.
ii. Equipment shall detect emitted radiation and convert detected radiation to visual signal.
iii. Both identifying photographs and thermographic photos shall be provided of the deficient areas. The thermographic photos shall be as seen on the imaging system.
The thermographs and identifying photos shall be contained in the report to provide a baseline inventory of the electrical system immediately preceding conditional acceptance.
d. Test Results/Tolerances
i. Operating temperature shall not exceed the manufacturers’ or listing agency’s rating for the equipment or attached conductors. The following temperature tolerances are for the equipment temperature ratings of 75 degrees C or above.
ii. The following tolerances are applied to temperature gradients/differences between phases on balanced three phase loads:
a) Temperature gradients between phases of 5 degrees C to 10 degrees C:
Contractor to correct problem.
b) Temperature gradients between phases of 11 degrees C and above: Contractor to correct problem.
iii. The following absolute temperature tolerances are applied to all components:
a) Temperature of 70 degrees C or more: Contractor to correct problem.
b) Temperature of 60 degrees C to 70 degrees C: Contractor to correct problem.
c) Temperature of 50 degrees C to 60 degrees C: Contractor to correct problem.
4. Training and Instruction Period
a. The Contractor shall note that certain of the other sections of these specifications require training on various equipment and systems. He shall make himself familiar with these requirements and where electrical controls are involved, he shall furnish, as part of this contract, any services or materials needed to provide the training required.
END OF SECTION
SECTION 16051