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INDIAN RIVER COUNTY - NORTH COUNTY REGIONAL PARK <br />AQUATIC FACILITY ROOFING REPLACEMENT <br />JUNE 7, 2019 <br />2.02 MATERIAL AND FABRICATION <br />A. Structural lightning protection: <br />PAGE 2 <br />SECTION 264100 <br />LIGHTNING PROTECTION SYSTEM <br />1. Bare copper conductors. <br />a. 57,400 cm cross-sectional area, 187 Ib./M, mini -strand size - AWG No. 17 <br />(Class 1, main conductor, NFPA 780). <br />b. 26,240 cm cross-sectional area, mini -strand size - AWG No. 17 (Class 1, <br />bonding conductor, NFPA 780). <br />2. Air terminals: 5/8 in. dia. tubular or 3/8 in. dia. solid, 10 in. high (20 ft. spacing) or <br />24 in. high (25 ft. spacing) round tapered copper point, complete with base <br />adapters, brackets and mounting hardware. <br />3. Fittings: Cast parallel clamps, straight splicers, tee clamps, cross run clamps and <br />bonding plates as required. No finger cable clamps are acceptable. <br />4. Roof penetrations: Threaded stem through -roof connectors, with galvanized steel <br />pitch box. <br />5. Cable clamps: Devices of the appropriate size for the application using either <br />mechanical or adhesive fastening means. <br />B. TVSS: <br />1. General requirements: TVSSs shall be rated for the class of service necessary for <br />the application. Protection shall be provided L -G only for service entrance <br />applications. Protection shall be provided L -G, and N -G for subpanel applications. <br />2. TVSSs shall be designed for AC power systems with a minimum of AC follow <br />current after operation. The surge current rating must be sufficient to meet the <br />requirement of the application at clamp levels below the damage level of the <br />equipment installed. <br />3. Electrical performance characteristics: <br />a. Service ratings: <br />120/240V Single-phase 4 -wire <br />208/120V Three-phase 4 -wire Wye <br />208V Three-phase 3 -wire Delta <br />480/277V Three-phase 4 -wire Wye <br />480V Three-phase 3 -wire Delta <br />b. MCOV levels: <br />Nominal System Voltage (VRMS) <br />MCOV (VRMS) <br />120 <br />135 <br />208 <br />240 <br />240 <br />275 <br />277 <br />315 <br />480 <br />550 <br />c. UL listing: The TVSS may be UL listed under 1449, or test reports may be <br />submitted substantiating the performance of the devices. <br />