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HomeMy WebLinkAbout27 15 00 Horizontal CablingARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 1 OF 20 MARCH 29, 2013 SECTION 27 15 00 HORIZONTAL CABLING PART 1- GENERAL 1.1 WORK INCLUDED A. Provide all labor, materials, tools, and equipment required for the complete installation of work called for in the Contract Documents. Unless noted otherwise all work included in this section is included in the data cable contract. B. Prior to installation and as part of the contract, relocate any device a distance of 6 feet in any direction at the request of the owner, at no additional cost. This shall include all necessary conduit, cable, raceways, painting and patching to accomplish the modification. Also refer to Division 26. C. Refer to Appendix A of the specifications for the Proposed Cable Schedule. D. Refer to section 27 05 00 section 1.2 for additional requirements as it relates to removal of existing cables to free up space in existing pathways intended for reuse for new Category 6 installations. 1.2 SCOPE A. Horizontal cabling includes Category 6 UTP from the Telecommunications Rooms (TR) to the outlets as shown on the plans and called for in the cable schedules (refer to Appendix). The horizontal cabling includes all horizontal cables, mechanically terminated jacks/inserts and faceplates in the work area and the mechanical termination in the TR. B. This section includes minimum requirements for the following: 1. Unshielded Twisted Pair Cable 2. Connecting Hardware 3. Cable Terminations 4. Faceplates 1.3 QUALITY ASSURANCE A. All cable shall be installed in a neat and workmanlike manner. All methods of construction that are not specifically described or indicated ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 2 OF 20 MARCH 29, 2013 in the contract documents shall be subject to the control and approval of the Owner's Representative. Equipment and materials shall be of the quality and manufacture indicated. The equipment specified is based upon the acceptable manufacturers listed. Where "approved equal" is stated, equipment shall be equivalent in every way to that of the equipment specified and subject to approval B. Strictly adhere to all Category 6 (BICSI and TIA) and manufacturer recommended installation practices when installing high performance cabling. C. All methods of construction that are not specifically described or indicated in the Contract Documents shall be subject to the control and approval of Cornell University. D. Equipment and materials shall be of the quality and Manufacturer indicated. E. Provide with the submittals, documentation from an independent testing agency indicating that the complete assembly including cable and termination hardware has been tested and meets the performance criteria called for. F. Materials and work specified herein shall comply with the applicable requirements of: 1. ANSI/TIA – 568-C 2. ANSI/TIA – 569-B 3. ANSI/TIA – 606-A 4. ISO/IEC 11801– 2002 (or newer edition) 5. NFPA 70 – 2002 (or newer edition) 6. BICSI Telecommunications Distribution Methods Manual, current edition 7. Cornell University Design and Construction Standards, current Edition 8. National Electrical Installation Standards (ANSI/NECA/BICSI- 568, 2006) 9. FCC 47 CFR 68 10. NEMA - 250 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 3 OF 20 MARCH 29, 2013 11. NEC - Articles 770, 800,810. 12. ADA, Americans with Disabilities Act. 1.4 SUBMITTALS A. Manufacturers catalog sheets, specifications and installation instructions for all cable, connecting hardware and patch cords B. Evidence of manufacturer’s certification to install and warrant Panduit UTP, copper backbone and Corning optical fiber cables and housings. C. Termination details for all cable types. D. List of three (3) installations of equivalent or larger systems that have been installed within the past two (2) years and have been operating satisfactorily for a minimum of one year. (Include names and phone numbers of references at the site of installation) E. Cable Test Reports (prior to hardware/software installation). F. Also refer to Section 27 05 00 Basic Communication Requirements G. Also refer to Refer to Section 01 33 00 – Submittal Procedures. PART 2- PRODUCTS 2.1 100 OHM UNSHIELDED TWISTED PAIR CABLE A. Shall be Category 6A type cabling, compliant with the requirements of the most current ANSI/TIA 568-C standard, for all wireless locations . B. Shall be Category 6 type cable, compliant with the requirements of the most current ANSI/TIA 568-C standard, for all other locations. C. Shall be independently verified to comply with ANSI/TIA 568-C.2-1. D. An ISO 9002 Certified Manufacturer shall make the cable. E. Cable shall be UL LISTED. F. Physical Characteristics: 1. Shall meet applicable requirements of ANSI/ICEA-S-80-576 and NEC. 2. Conductor shall be 23 AWG solid bare annealed copper. ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 4 OF 20 MARCH 29, 2013 3. Category 6A: Outer jacket color shall be green or as directed by Owner. 4. Category 6: Outer jacket color shall be blue or as directed by Owner. 5. Category marking shall be printed every one foot. Footage indicators shall also be providing on jacket. 6. The diameter of the insulated conductor shall be .023 in. maximum. 7. Shall consist of (4) 22-26 AWG twisted pairs. 8. Shall be suitable for the environment in which they are to be installed. 9. The color coding of pairs shall be: Pair 1 W-BL; BL Pair 2 W-O; 0 Pair 3 W-G; G Pair 4 W-BR; BR 10. The overall diameter of the cable shall be less than 0.250 inches. 11. The ultimate breaking strength measured in accordance with ASTM D 4565 shall be 400 N minimum. 12. Cable shall withstand a bend radius of 1 inch at -20 degrees Celsius without jacket or insulation cracking. 13. Cable shall be third party verified to meet ANSI/TIA 568-C.2-1, Category 6 requirements. G. Transmission Characteristics: 1. Cable shall be ANSI/TIA-568-C.2-1 and ISO/IEC 11801 category 6 compliant. 2. Attenuation shall be measured in accordance with TIA/EIA 568B.2-1 and shall be maximum of 19.8dB @ 100 MHz. 3. Cable shall exhibit positive PSACR above 250 MHz. 4. Cable shall be tested & characterized to 500 MHz. ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 5 OF 20 MARCH 29, 2013 5. Cable shall be UL LISTED. Cable shall exhibit a NEXT loss of at least the following: Frequency MHz NEXT dB 1.0 78 4.0 69 10.0 63 16.0 60 20.0 58 31.25 55 62.5 51 100.0 48 200 44 250 42 a) Cable shall exhibit ELFEXT loss of at least the following: Frequency MHz ELFEXT dB 1.0 75 4.0 63 10.0 55 16.0 51 20.0 49 31.25 45 62.5 39 100.0 35 200 29 250 27 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 6 OF 20 MARCH 29, 2013 b) Cable shall exhibit Attenuation loss of less than the following: Frequency MHz Attenuation dB 1.0 2.0 4.0 3.8 10.0 6.0 16.0 7.6 20.0 8.5 31.25 10.7 62.5 15.4 100.0 19.8 200 29.0 250 32.58 c) Cable shall exhibit a return loss according to the following: Frequency MHz Return Loss (dB) 1 20.0 4 23.0 10 25.0 16 25.0 20 25.0 31.25 23.6 32.5 21.5 100 20.1 200 18.0 250 17.3 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 7 OF 20 MARCH 29, 2013 H. Design Make: 1. CAT6 Riser Rated - CommScope/SYSTIMAX 1071E, 4-pair, CMR Riser rated with blue jacket. 2. CAT6 Plenum - CommScope/SYSTIMAX 2071E, 4-pair, CMP Plenum rated with blue jacket. 3. CAT6A Riser - CommScope/SYSTIMAX 1091B, 4-pair, CMR Riser rated with green jacket. 4. CAT6A Plenum - CommScope/SYSTIMAX 2091B, 4-pair, CMP Plenum rated with green jacket. I. Acceptable Manufacturers: 1. Berk Tek Lanmark 1000 2. Panduit GenSPEED 6000 2.2 GENERAL REQUIREMENTS FOR CONNECTING HARDWARE - 100 OHM UTP A. Physical Characteristics 1. Each UTP cable will be terminated at the outlet with a Mini-Com Executive Series 8 position 8 wire Category 6 or 6A RJ45 modular jack. 2. Jacks shall be 8 position un-keyed 3. The manufacturer shall have conducted performance testing at the component level by a UL certified testing laboratory, and include Active Live Channel Testing to insure manufacture and performance quality. 4. Jack housings shall be high impact 94 V-0 rated thermoplastic 5. Jack modules shall have a temperature rating of -10 °C (14°F) to 60°C (140 °F) in conformance with ANSI/TIA568-C 6. Jack modules shall be used in all work areas and shall exceed the connector requirements of the ANSI/TIA Category 6 or 6A standard. 7. Jack modules shall be 100% tested to ensure NEXT performance. ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 8 OF 20 MARCH 29, 2013 8. Jack modules shall be universal in design, including complying with the intermateability standard IEC 60603-7 for backward compatibility. 9. Category 6 modules shall have UL and CSA approval. 10. The modules shall be able to be re-terminated a minimum of 10 times. 11. The modules shall have ETL verified Category 6 performance and ISO Class E performance (as defined in ISO/IEC 11801) in both the basic and channel links. They shall be universal in design, accepting six or eight-pair modular plugs without damage to the outer module contacts. 12. Jack modules shall have a designation indicating Category 6 or 6A compliance. Jack module shall also have a date code and a complete catalog number and abbreviated series numbers indicated on each module. 13. Jacks shall utilize a paired punch down sequence. Cable pair twists shall be maintained up to the IDC, terminating all conductors adjacent to its pair mate to better maintain pair characteristics designed by the cable manufacturer. 14. The module shall snap into all Mini-Com outlets and patch panels. 15. Jacks shall terminate 22-26 AWG unshielded twisted pair cable, stranded or solid conductors. 16. Jacks shall terminate insulated conductors with outside diameters up to .050” 17. Jacks shall be compatible with single conductor 110 impact termination tools. 18. Jacks shall include translucent wire termination/retention stuffer cap, that holds terminated wires in place, provides positive locking latch to proper conductor strain relief on the cable jacket, and allow the conductors to be visually inspected in the assembled housing can ensure cable twists can be maintained to within 1/8” (3.18mm). 19. Jack modules shall be compatible with ANSI/TIA 606-A color code labeling and each module shall include a label marked with both T-568A and T-568B wiring schemes. ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 9 OF 20 MARCH 29, 2013 20. The jack module shall include an identification to signify Category 6, 330 MHz performance. 21. Meets FCC Part 68 Subpart F; contacts plated with 50 microinches of gold. 22. Jack modules shall be manufactured in the USA B. Jack modules shall be UL LISTED 1863 and CSA certified. C. Jack modules shall be made by an ISO 9002 Certified Manufacturer. D. Jack modules installed in a 4-connector channel with a category 6 patch panel and category 6 patch cords, all from the same manufacturer and designed to be installed together, along with a qualified category 6 cable shall meet or exceed the channel requirements of the ANSI/TIA-568-C ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 10 OF 20 MARCH 29, 2013 E. Jack modules installed in a 4-connector channel configured as described in section d above, shall exhibit a worst pair channel NEXT loss of at least the following, and be fully compliant with the manufacturer performance requirements for the warranty specified and meets or exceed the permanent link and channel requirements of the ANSI/TIA-568-C.1 Standard. Frequency NEXT MHz dB 1.0 65.0 4.0 63.0 8.0 58.2 10.0 56.6 16.0 53.2 20.0 51.6 25.0 50.0 31.25 48.4 62.5 43.4 100.0 39.9 200.0 34.8 250.0 33.1 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 11 OF 20 MARCH 29, 2013 F. Jack modules installed in a 4-connector channel configured as described in section d above, shall exhibit a worst pair channel PSNEXT loss of at least the following, and be fully compliant with the manufacturer performance requirements for the warranty specified and meets or exceed the permanent link and channel requirements of the ANSI/TIA-568-C.1 Standard. Frequency PSNEXT MHz DB 1.0 62.0 4.0 60.5 8.0 55.6 10.0 54.0 16.0 50.6 20.0 49.0 25.0 47.3 31.25 45.7 62.5 40.6 100.0 37.1 200.0 31.9 250.0 30.2 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 12 OF 20 MARCH 29, 2013 G. Jack modules installed in a 4-connector channel configured as described in section d above, shall exhibit a worst pair channel Insertion Loss of not more than the following, and be fully compliant with the manufacturer performance requirements for the warranty specified and meets or exceed the permanent link and channel requirements of the ANSI/TIA-568-C.1 Standard. Frequency Insertion LOSS MHz DB 1.0 2.1 4.0 4.0 8.0 5.7 10.0 6.3 16.0 8.0 20.0 9.0 25.0 10.1 31.25 11.4 62.5 16.5 100.0 21.3 200.0 31.5 250.0 35.9 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 13 OF 20 MARCH 29, 2013 H. Jack modules installed in a 4-connector channel configured as described in section d above, shall exhibit a worst pair channel ELFEXT loss of at least the following, and be fully compliant with the manufacturer performance requirements for the warranty specified and meets or exceed the permanent link and channel requirements of the ANSI/TIA-568-C.1 Standard. Frequency ELFEXT MHz DB 1.0 63.3 4.0 51.2 8.0 45.2 10.0 43.3 16.0 39.2 20.0 37.2 25.0 35.3 31.25 33.4 62.5 27.3 100.0 23.3 200.0 17.2 250.0 15.3 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 14 OF 20 MARCH 29, 2013 I. Jack modules installed in a 4-connector channel configured as described in section d above, shall exhibit a worst pair channel PSELFEXT loss of at least the following, and be fully compliant with the manufacturer performance requirements for the warranty specified and meets or exceed the permanent link and channel requirements of the ANSI/TIA-568-C.1 Standard. Frequency PSELFEXT MHz DB 1.0 60.3 4.0 48.2 8.0 42.2 10.0 40.3 16.0 36.2 20.0 34.2 25.0 32.3 31.25 30.4 62.5 24.3 100.0 20.3 200.0 14.2 250.0 12.3 ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 15 OF 20 MARCH 29, 2013 J. Jack modules installed in a 4-connector channel configured as described in section d above, shall exhibit a channel return loss of at least the following, and be fully compliant with the manufacturer performance requirements for the warranty specified and meets or exceed the permanent link and channel requirements of the ANSI/TIA- 568-C.1 Standard. Frequency Return Loss MHz DB 1.0 19.0 4.0 19.0 8.0 19.0 10.0 19.0 16.0 18.0 20.0 17.5 25.0 17.0 31.25 16.5 62.5 14.0 100.0 12.0 200.0 9.0 250.0 8.0 K. Jack modules installed in a 4-connector channel shall exhibit a delay skew of not more than 50 ns/100 m between 1 and 250 MHz. L. Modular Jack Design Make: 1. CAT6 - Panduit Mini-Com TX6 Plus Jack Module TP Series, Electric Ivory (or color to match existing conditions or as called for -- Panduit # CJ688TPEI Series. Confirm wiring scheme with Owner for all Category 6 terminations. 2. CAT6A - Panduit Mini-Com TX6A Plus Jack Module TP Series, Electric Ivory (or color to match existing conditions or as called ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 16 OF 20 MARCH 29, 2013 for -- Panduit # CJ688TGEI Series. Confirm wiring scheme with Owner for all Category 6 terminations. 2.3 FACEPLATE DESIGN MAKES AND OPTIONS A. Double Gang – Panduit CBEEI-2G Minicom executive series, 8 module, Ivory B. Single Gang Vertical – series. Panduit # CBEE1 C. Box/Surface Mount, 2 module Panduit # CBXJ2EI-A D. Bezel Insert Sloped 2 Module Space Ivory Panduit # CHS2EI-X (10pk) E. Bezel Insert Flat Blank 2 Module Wide Ivory Panduit # CHB2EI-X F. Single Gang Horizontal four port – Panduit #CFPHSL4EI series 12 Port MUTOA – Panduit #CBXF12EI-AYRefer to requirements on program standard detail drawings for recessed, surface boxes and surface raceway outlet configurations and sloped bezel versus flat bezel arrangements. G. Blank plates matching existing plastic ivory communication faceplates – to be provide by Telecommunication Contractor for all existing unused flush backboxes and all surface raceway openings where cable are removed under this contract. 2.4 WALL PHONE JACK ASSEMBLY A. Shall be constructed of stainless steel B. Shall have permanently affixed steel mounting studs designed to mate with corresponding telephone base plate or adapter. C. Shall mount to single gang outlet box, surface box or to wall directly. D. Shall be wired to wiring scheme as directed by Owner. E. Rated for CAT 6 including testing. F. Shall be 8-position and 8-conductor. G. Design Make: Panduit KWP6PYas approved by Owner. H. Acceptable Manufacturers: 1. Suttle Appartus/CSI 2. Lucent/Avaya ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 17 OF 20 MARCH 29, 2013 3. CommScope/Systimax 2.5 PATCH CORDS, CATEGORY 6 – TO BE PROVIDED BY THE OWNER (CIT/NCS FIELD SERVICES GROUP). 2.6 TELEPHONE LINE CORDS – TO BE PROVIDED BY THE OW NER (CIT/NCS FIELD SERVICES GROUP). 2.7 VOICE CROSS CONNECT AND FRAME WIRE – TO BE PROVIDED BY THE OWNER (CIT/NCS FIELD SERVICES GROUP). PART 3- EXECUTION 3.1 INSTALLATION A. UTP Cable: 1. All exposed wiring shall be installed in surface metal raceway, conduit, and enclosed cable tray, except within TR’s. 2. All wiring above ceilings shall be installed in cable tray, conduit, raceway or limited use of j-Hooks as called for. 3. Shall be installed to provide minimal signal impairment by preserving wire pair twists as closely as possible to the point of mechanical termination. The amount of untwisting in a pair as a result of termination shall be no greater than 0.5 inches (13 mm). 4. Shall be installed according to manufacturer’s instructions. 5. Shall be installed such that cables can maintain minimum bend radius of at least 4 times the cable diameter. Cables shall be terminated in such a way that there is no tension on the conductors in the termination contacts 6. Shall be installed in one continuous length unless specified in the contract document. 7. The Contractor shall be responsible for replacing all cables that do not pass required bandwidth and throughput tests. 8. Maximum length shall be 90 meters, TR termination to WAO termination. 9. Cable shall have no physical defects such as cuts, tears or bulges in the outer jacket. Cables with defects shall be replaced. ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 18 OF 20 MARCH 29, 2013 10. Install cable in neat and workmanlike manner. Neatly bundle, support and tie all cable in closets, in both the vertical and horizontal plane. Leave sufficient cable for 90o sweeps at all vertical drops. 11. Provide reusable velcro-type hook and loop straps in each rear vertical channel. Reusable straps shall be of varying sizes (each allowing 50% spare future expansion) and of adequate quantity to secure cable bundles at least every 4 rack units 12. Provide reusable velcro-type hook and loop straps in each horizontal of overhead ladder rack/cable runway. Reusable straps shall be of varying sizes (each allowing 50% spare future expansion) and of adequate quantity to secure cable bundles at least every 3’ in straight runs and at least every 12” in radius turns and waterfalls. 13. Provide reusable velcro-type hook and loop straps in each vertical run of ladder rack/cable runway. Reusable straps shall be of varying sizes (each allowing 50% spare future expansion) and of adequate quantity to secure cable bundles at least every 12”. 14. Maintain the following clearances from EMI sources. a) Power cable - 6 in. b) Fluorescent Lights - 12 in. c) Transformers - 36 in. 15. Adhere to TIA standard requirements regarding pulling tension and allowable lubricants. 16. Do not install Category 6 or 6A cable with more than 110N (25 lbs) pull force, as specified in ANSI/TIA and BICSI TDDM practices. Utilize appropriate cable lubricant in sufficient quantity to reduce pulling friction to acceptable levels on: long pulls inside conduit, pulls of multiple cables into a single small bore conduit, on conduit runs greater than 100 lineal feet with bends of opposing directions, and in conduit runs that exceed 180 degrees of accumulated bends. Use of tensile rated cords (i.e. fishing line) should be used for difficult or questionable pulls - to judge to go/no-go condition of the conduit and pulling setup. 17. Care must be taken so that the cable does not bend at any location to a radius less than ten times the diameter of the cable. A cable feeder guide or rollers of suitable dimensions ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 19 OF 20 MARCH 29, 2013 should be used between the cable reel and the face of the duct to protect the cable and guide it into the duct as it is pulled off the reel. 18. As the cable is pulled off the reel, it should be carefully watched and inspected for sheath defects. If defects are noticed, the pulling operation should be stopped immediately and the Engineer promptly notified of the defect. Kinks and/or other irregularities in the cable sheath should be removed or corrected as directed by the engineer. 19. Cable jackets that are chaffed or burned exposing internal conductor insulation or have bare conductors shall be replaced, not spliced 20. Test, label and document as called for. 21. Firestop the interior of fire rated assembly openings where sleeves, conduits, raceways, cable trays or cables are installed through a fire barrier. B. UTP MODULAR JACKS 1. All cables shall be terminated with modular jacks that snap into a faceplate mounted on a wall outlet box, surface raceways or power pole. 2. Outlet boxes shall be secured to building with mechanical fasteners. Adhesive fasteners are not allowed. 3. Jacks shall be installed to provide minimal signal impairment by preserving wire pair twists as close as possible to the point of mechanical termination. The amount of untwisted in a pair as a result of termination to the jack shall be no greater than 0.5 inches (13mm). 4. Jacks shall be installed according to manufacturer’s instructions and properly mounted in plates, frames, housings or other appropriate mounting device. 5. Jacks shall be installed such that cables terminated to the jacks maintain minimum bend radius of at least 4 times the cable diameter into the IDC contacts. Cables shall be terminated on jacks such that there is no tension on the conductors in the termination contacts. 6. All extra openings to be filled with blank inserts. ARCHI-TECHNOLOGY CORNELL – NCP HORIZONTAL REQUIREMENTS STANDARD SPECIFICATIONS 27 15 00 – PAGE 20 OF 20 MARCH 29, 2013 7. Terminate cable per EIA/TIA T-568B standard pin assignments. C. FIRESTOPPING 1. Firestop all sleeves and conduit openings after each cable installation are roughed-in and complete. 2. Never leave breaches in two and three hour rated assemblies open for more than a 24 hour period. 3. Provide firestopping as called for in Section 07840 and Section 27 05 00 END OF SECTION