ࡱ> O Mbjbj(9(9 QwJSWiJSWi\D&(((8`\L(5t  (0 0 0 d!"! !sssssss$uxs!d!d!!!s0 0 4s2>*>*>*!R0 0 s>*!s>*>* g$ o0 p!mbxss<5tfm!y"!y o!y ol!!>*!!!!!ssh&!!!5t!!!!!y!!!!!!!!!X : SECTION 26 41 00 lightning protection system GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General Conditions and Division 01 Specification Sections, apply to this Section. SUMMARY This Section specifies the system design, materials, installation, grounding, bonding, appurtenances, inspections, and certification required for a comprehensive lightning protection system. This Section also includes all necessary Work to connect all newly installed fan stacks and other appurtenances to the existing UL master labeled system. This Section shall be used in conjunction with the following other specifications and related Contract Documents to establish the total requirements for lightning protection systems. Section 26 01 00 - Basic Electrical Requirements Section 26 05 26 - Grounding Section 26 05 33 - Raceways, Conduits, and Boxes Section 26 13 00 - Medium-Voltage Metal Enclosed Switchgear Section 26 23 00, Metal-Enclosed Low-Voltage Switchgear 600 Volt and Below REFERENCE STANDARDS The materials and installation shall conform to the minimum requirements and latest revisions of the following codes, standards and regulations wherein they apply: NFPA 70 - National Electrical Code UL 96 - Lightning Protection Components UL 96A Installation Requirements for Lightning Protection Systems NFPA 780 Standards for the Installation of Lightning Protection Systems LPI 175 - Standard of Practice for the Design - Installation - Inspection of Lightning Protection Systems IEEE 81 - Guide for Measuring Earth Resistivity, Ground Impedance and Earth Surface Potentials of a Ground System IEEE 1100 - Recommended Practice for Powering and Grounding Sensitive Electronic Equipment (IEEE Emerald Book) ANSI/IEEE 142 - Grounding of Industrial and Commercial Power Systems (Green Book) quality assurance Manufacturer: Company specializing in lightning protection equipment with minimum three years documented experience and material compliance with UL requirement. Contractor Qualifications: The Contractor for the Work covered by this Specification shall be one that is recognized as being regularly engaged in the design and installation of lightning protection systems. The Contractor must be listed by Underwriters Laboratories, Inc., and must employ competent personnel fully qualified in the field of lightning protection. The Contractor must have minimum ten years documented experience. Master Label: The system design and installation shall meet or exceed the requirements of UL 96A for a Master C Label. UL master label shall be obtained. Upon completion, the lightning protection system shall be inspected by a representative of the owner. The lightning protection system must pass the inspection. If the system does not pass inspection, the Contractor must make corrections to the system to pass inspection. The master label shall be installed in the main electrical room wall. SYSTEM DESIGN The lightning protection system components on building roof shall be taken into consideration during the buildings design phase. System components can be built in so as to be protected from mechanical displacement, and environmental effects. In addition, aesthetic advantages can be gained by such concealment especially for low-rise buildings where exposed lightning protection system components on building roof can be highly visible. Alternate installation detail for rooftop lightning terminals shall be developed if the attachment to parapet wall is prohibited due to the concern of roof warranty. Main conductors shall interconnect all strike termination devices and shall form two or more paths from each strike termination device downward, or horizontally. Main conductors shall be installed on building roof. Roof penetration can be minimized for the entry of down conductors and interconnecting conductors. When a lightning conductor system is placed on a building, within or about which there are metal objects of considerable size within a few feet of a conductor, there will be a tendency for sparks or side flashes to jump between the metal object and the conductor. To prevent damage, interconnecting conductors should be provided at all places where side flashes are likely to occur. A ground ring electrode (counterpoise conductor loop) encircling a structure shall be designed to connect down conductors and grounding electrodes. Provide intermediate-level potential equalization for reinforced concrete structure buildings, interconnecting the lightning protection system down conductors and other grounded media with a loop conductor at intermediate levels not exceeding 200 ft per NFPA 780. SUBMITTALS Product Data: Product Data: Submit complete descriptive information on all materials and installation methods. Product data showing dimensions and materials of each component and include indication of listing in accordance with UL96. Record Documents: Shop Drawings: Detailed plan drawings shall be prepared to 1/8 = 1-0 scale which indicates all Work to be performed. Shop drawings showing layout of air terminals, grounding electrodes, and bonding connections to structure and other metal objects. Include air terminal, grounding electrode, conductor sizes, connections, and termination details. Shop drawings shall include locations of conductors, roof penetrations, floor penetrations, etc., and their compatibility with provisions made during the construction. Once the contract has been established the Contractor shall make a review of provisions being made for the system installation and comment, in writing, with changes or compliance within two weeks of finalizing the contract. Contractor shall coordinate locations of conductors in walls and all penetrations with the appropriate trades: Failure to coordinate these requirements shall not relieve lightning protection Contractor from properly completing its work. This Contractor shall employ the proper trades to provide the chases in walls and roof and floor penetrations required to install the conductors if not coordinated before the floors, walls and roof are installed. Manufacturer's catalog numbers and generic identification shall be indicated for all components shown on the Drawings. Record Drawings: The Contractor shall maintain a master set of Record Drawings that shows changes and any other deviations from the Base Drawings. Approvals: Secure formal approval of Shop Drawings and product data prior to ordering material or installation. Coordinated Submittal. Submit product data and shop drawings for grounding system and lightning protection system at the same time and as one package. Indicate common components and interconnections between grounding and lightning protection systems. Refer to Section 26 05 26 for Grounding system. Coordinate submittal for lightning protection system with surge protection devices, 15kV-class switchgear, 480-volt main switchgear, and electrical service to project. Refer to Section 26 00 05 for electrical service. Refer to Section 26 13 00 for Medium-Voltage Metal Enclosed Switchgear. Refer to Section 26 23 00 for 480-volt metal-enclosed switchgear. Refer to Section 26 43 13 for Surge Protection Devices. The Contractor shall maintain a master set of As Built record drawings that shows changes and deviations from the Drawings, in accordance with Division One requirements. Deliver As-Built record drawings to Owner upon Owner acceptance of project. Where not specified otherwise in Division One or the General and Supplementary Conditions of the construction contract, deliver one set of As-Built record drawings plotted full-scale on mylar or vellum with permanent ink, prepared to 1/8-inch scale with 1/8-inch text. Also deliver one set of As-Built record drawings on CD-ROM or similar electronic media acceptable to the Owner. Drawing files shall be in AutoCAD (.dwg) and Adobe Acrobat (.pdf). PRODUCTS GENERAL All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction. The system provided under this specification shall be the standard product of a manufacturer regularly engaged in the production of lightning protection systems and shall be the manufacturer's latest approved design. Listing of the manufacturer in the lightning protection section of the current edition of Underwriters' Laboratories, Inc., Electrical Construction Materials List will be accepted as compliance with this requirement. Materials used in connection with the installation of the lightning protection system shall be approved for lightning protection systems by the Underwriters' Laboratories, Inc. No combination of materials shall be used that forms an electrolytic couple of such nature that corrosion is accelerated in the presence of moisture. Where unusual conditions exist which would cause deterioration on corrosion of conductors, conductors with suitable protective coatings or oversize conductors shall be used. If a mechanical hazard is involved, the conductor size shall be increased to compensate therefore, or suitable protection shall be provided. The conductors may be protected by covering them with molding or tubing made of nonmagnetic material. Aluminum materials may not be used except on roofs that utilize aluminum roofing components. When aluminum materials are used, provide all materials of aluminum composition to ensure compatibility, except down conductors and grounding. CONDUCTORS All conductors shall be stranded or braided copper and of the grade ordinarily required for commercial electrical work generally designated as being 98 percent conductive when annealed. Stranded or braided aluminum conductors shall be used on roofs that utilize aluminum components. Aluminum conductors shall be immediately transitioned to copper conductors by using appropriate bimetal connectors as soon as they depart from aluminum surfaces. Conductor minimum sizes are per NFPA 780. AIR TERMINALS Air terminals shall be nickel-plated solid copper with tapered bullet point tips (in lieu of sharp point tips). Minimum air terminal size shall be 5/8-inch diameter by 24 inches long. Where air terminals longer than 24 inches are required, solid copper rods of the appropriate length with threaded ends may be securely attached to the air terminals for extensions. Provide a three-leg tripod brace for each air terminal over 24 inches long. Secure the triangular brace to the roof in a manner approved by the roof vendor. Conductor connections to air terminals shall be bolted. GROUND RODS Ground rods shall be copper-clad steel, -inch diameter by 10 feet in length. CONNECTIONS All below ground and concealed connections shall be made with exothermic welded connections. Visible connections shall be made with cast bronze bolted pressure connectors that utilize stainless steel or silicon bronze bolts. Connectors shall be: Thompson No. 424B (4-inch parallel clamp) for conductors, Thompson No. 702 bonding plate, Thompson No. 637 cross-run clamp or accepted substitution. Equivalent devices by other manufacturers will be considered. Use stainless steel or bronze materials shall be used to connect to aluminum products or structures, such as exposed metallic stacks. Fittings. Shall, except cable holders, be heavy-duty made from bronze castings. Pressure plates made from stamped or pressed metal parts, or fittings utilizing crimp-type pressure devices will not be allowed. Bolts, screws, and related type hardware shall be stainless steel. Transitions. Make transitions from aluminum to copper conductors using approved, UL-Listed AL-to-CU connectors approved for the purpose and conductors to be joined or spliced. MANUFACTURERS Bonded Lightning Protection Systems. Advanced Lightning Technology. Thompson Lightning Protection. Hicks Lightning Protection. Taylor Lightning Protection SURGE ARRESTERS Coordinate with switchgear supplier for selection and installation of surge arresters suitable for use at the electrical service entrance. Refer to Section 26 13 00 for Medium-Voltage Metal-Enclosed Switchgear. Refer to Section 26 23 00 for Metal-Enclosed Low-Voltage Switchgear 600 Volt and Below. ROOF PENETRATIONS Roof penetrations shall be accomplished with through-roof fittings specially designed for this purpose. Fittings shall incorporate a positive means for sealing around the penetration. EXECUTION PREPARATION: Design and provide a complete lightning protection system consisting of air terminals, conductors, connectors, attachments, ground ring electrode, grounding, bonding and necessary appurtenances to comply with minimum requirements listed in the referenced standards. The system shall be installed in a neat workmanlike manner and without interfering with other building systems. Verify that surfaces are ready to receive work, and field measurements are as shown on the shop drawings. Beginning of installation means installer accepts existing conditions. Protect elements surrounding work of this Section from damage or disfiguration. DELIVERY, STORAGE AND HANDLING Deliver materials in original factory packaging. Handle material carefully and per manufacturers instructions to avoid damage. Store in a clean dry space and protected from weather, moisture, mud, and damage. INSTALLATION: Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction. All installation shall be in accordance with manufacturers published recommendations. Conductors: Down conductors are required. Concealed down conductors shall be installed in continuous insulating PVC raceways. Metallic raceways shall not be used. Building steel cannot be substituted for down conductors. All down conductors must be concealed. Secure conductors to the roof or other structure at a maximum interval of 3 feet. Air Terminals: Air terminal installations shall be designed and braced for 100-mph winds with 125-mph gusts. Connections: At the completion of the Project, all bolted connectors shall be checked for proper bolt torque. Roof connections All levels: Except where specified or shown to use aluminum conductor, make direct connections to lightning protection system with copper conductor for roof mounted equipment, enclosures, mast, and fan stacks. Provide bonding jumpers across equipment mounting isolators and ductwork isolators to provide a complete ground path. Bond roof air terminals to lightning protection system downlead conductors or conductor loop. Bonding. Metallic objects and systems at roof levels, elsewhere on the structure, and conductive members of the structure shall be completely bonded. Metallic vent pipes at roof that do not extend further than 9 inches above the roof level do not require bonding, except as required to receive a UL-Master Label. Primary bonds for metal bodies of conductance shall be bonded with appropriate fittings and full-size conductor and shall consist of, but not be limited to, the following: roof exhaust fans, fresh air intakes, antenna masts for TV, metal stacks, etc. Metal bodies of inductance located within six feet of a conductor or object with primary bond, shall be bonded with secondary cable and fittings. Typical of these are: roof flashings, parapet coping caps, gravel guards, isolated metal building panels or siding, roof drains, down spouts, roof ventilators, exterior balcony handrails, lower-level miscellaneous metals, etc. Roof Attachments and Penetrations: Air terminals, conductors and appurtenances for the lightning protection system require attachment to building roofs. Down conductors require penetration of roof surfaces. All attachments to or penetrations through roofs must be in strict accordance with the roof manufacturer's recommendations. Coordinate roof penetrations with Architectural Drawings. The Contractor shall submit details of all roof attachments and penetrations to the appropriate roof manufacturer for approval prior to installation. Once the lightning protection system installation is complete, the Contractor shall engage the appropriate roof manufacturer to inspect all roof attachments and penetrations on that manufacturer's roof. After the inspection, the roof manufacturer shall furnish the Owner with a letter indicating that all lightning protection system component roof attachments and penetrations are satisfactory and that such attachments and penetrations will not in any way reduce the manufacturer's warranty on the roof. Any fees for services or inspections provided by the roof manufacturer to accomplish the above related requirements shall be at the expense of the Contractor. Cover-Up Inspection: Prior to cover-up of concealed components and connections, notify the Owner so that a cover-up inspection can be performed. Correct any deficiencies and request a final inspection by the Owner prior to concealment of components and connections. Antennas: Antennas and towers shall be protected without connecting. Conflicts: In the event a conflict exists between this Specification and any of the referenced standards, the requirements of referenced standards govern. Necessary variances or corrections shall be made at the expense of the lightning protection contractor to obtain UL Master Label. 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