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MULTI-PURPOSE SOUND SYSTEM <br />Section 16780 <br />15-1207 <br />level and control cables at screw or tubular clamp type barrier blocks on the left side of <br />the equipment enclosure, as viewed from the rear. Route all AC power cords on the left <br />side of the equipment enclosure, as viewed from the rear. AC power cords shall not be <br />ti -wrapped or laced together. <br />F. Make all connections to screw type barrier blocks with insulated crimp type spade lugs. <br />Utilize a tool that does not split or otherwise damage the insulated sleeve. <br />G. Use only rosin core 60/40 tin lead solder for all solder connections. <br />H. Dress, lace or harness all wire and cable to prevent mechanical stress on electrical <br />connections; no wire or cable shall be supported by a connection point. Provide service <br />loops where harness of different classes cross, or where hinged panels are to be <br />interconnected. <br />Correct any and all of the following unacceptable wiring conditions: <br />1. Deformed, brittle or cracked insulation. <br />2. Insulation shrunken or stripped further than 1/8 inch away from the actual point of <br />connection within a connector, or on a punch block. <br />3. Cold solder joints. <br />4. Flux joints. <br />5. Solder splatter. <br />6. Ungrommeted, unbushed, or uninsulated wire or cable entries. <br />7. Deformation or improper radius of wire or cable. <br />3.6 SIGNAL GROUNDING PROCEDURES: <br />A. Unless otherwise noted maintain a unipoint ground scheme. <br />B. Signal and electrical system grounds shall be isolated except at the local Isolated <br />Ground distribution panel or project ground field connection. <br />C. Equipment enclosures shall not be permitted to touch each other unless bolted <br />together. <br />D. All equipment enclosures and racks shall be connected to Isolated Ground by a single, <br />green insulated #10 stranded wire. <br />E. Each ensemble of racks shall include a single label Isolated Ground tubular clamp bus <br />bar terminal strip to land the individual label rack grounds. At each rack, provide a lug <br />bonded to the rack frame with a green insulated #12 TW stranded wire to the Isolated <br />Ground bus central to the rack group. <br />F. Equipment signal ground shall be to the Isolated Ground System via the green wire of <br />the equipment power cord. Where equipment uses a two (2) wire power cord, provide a <br />green bond wire to the rack IG bus bar, gage equal to equipment main's power supply <br />conductors. <br />23 <br />