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EQUIPMENT CABLING CHAPTER 9: EQUIPMENT INSTALLATION 9.9.6.9.1 WIRE MAP The wire map test is used to verify wire pair to pin termination at each end of the cable and check for installation connectivity errors. Each of the 8 conductors in the cable are tested for: • Conductor continuity to the remote end of the cable • Shorts between any two or more conductors in the cable • Crossed pairs in the cable • Reversed pairs in the cable • Split pairs in the cable • Any other wiring errors in the cable 9.9.6.9.2 LENGTH The length test is used to determine the maximum physical length of the cable segments. 9.9.6.9.3 ATTENUATION Attenuation is the measure of signal loss in the cable segment. 9.9.6.9.4 NEAR-END-CROSSTALK (NEXT) LOSS NEXT loss is a measure of signal coupling from one wire pair to another within a single UTP cable segment. 9.9.7 OPTICAL FIBER CABLING WARNING Never look into an optical fiber cable. Optical fiber cables use invisible laser light that is dangerous and can cause damage to the eye. Optical fiber cable are grouped into three general categories as described below. (See NFPA 70-2005, Article 770.9 for additional information.) • Non-conductive - These cables contain no conductive materials. • Conductive - These cables contain noncurrent-carrying conductive members, such as metallic strength members, metallic vapor barriers, and metallic armor or sheath. • Composite - These cables contain optical fibers and current-carrying electrical conductors. These cable may also contain noncurrent-carrying conductive members, such as metallic strength members and metallic vapor barriers. Observe the following general considerations for the installation of optical fiber cabling: • Optical fiber cable installations shall conform to ANSI/TIA/EIA-568-B. • Bend radius shall not be shorter than 10 times the diameter of the optical fiber cable, or as recommended by the cable manufacturer. 9-26 68P81089E50-B 9/1/05
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES EQUIPMENT CABLING • Optical fiber cables shall not be installed in such a way that it prevents access to electrical equipment and removal of panels, including suspended ceiling panels. (See NFPA 70-2005, Article 770.21, and Figure 9-7 for additional information.) • Optical fiber shall be installed in a neat and workmanlike manner. Cables shall be supported in such a manner that the optical fiber cable will not be damaged by normal use of the building. (See NFPA 70-2005, Article 770.24 for additional information.) • Conductive optical fiber cables entering or leaving the building shall be have the noncurrentcarrying metallic members grounded as close as practical to the building entry. (See NFPA 70- 2005, Article 770.93 and Chapter 5, “Internal Grounding (Earthing),” for additional information.) • Optical fiber cables installed in plenums and other air-handling spaces shall be Plenum- rated cable and installed in accordance with NFPA 70-2005, Article 770. Plenum-rated optical fiber cable may be OFNP (Optical Fiber Non-conductive Plenum) or OFCP (Optical Fiber Conductive Plenum). • Optical fiber cables installed in vertical runs penetrating more than one floor, or cables installed in vertical runs in a shaft shall be Riser or Plenum-rated cable. Riser rated optical fiber cable may be OFNR (Optical Fiber Non-conductive Riser) or OFCR (Optical Fiber Conductive Riser). (See NFPA 70-2005, Article 770 for additional information.) • Non-conductive optical fiber cable shall be permitted to occupy the same cable runway or raceway with conductors for electric light, power, Class 1, nonpower-limited fire alarm, or medium power network-powered broadband communications circuits operating at 600 Volts or less. (See NFPA 70-2005, Article 770.133 for additional information.) • Conductive optical fiber cable shall not be permitted to occupy the same cable runway or raceway with conductors for electric light, power, Class 1, nonpower-limited fire alarm, or medium power network-powered broadband communications circuits. (See NFPA 70-2005, Article 770.133 for additional information.) • Composite optical fiber cables containing only current-carrying conductors for electric light, power, Class 1 circuits rated 600 Volts or less shall be permitted to occupy the same cabinet, cable runway, outlet box, panel, raceway, or other termination enclosure with conductors for electric light, power, or Class 1 circuits operating at 600 Volts or less. (See NFPA 70-2005, Article 770.133 for additional information.) • Non-conductive optical fiber cables shall not occupy the same cabinet, outlet box, panel, or similar enclosure housing the electrical terminations of an electric light, power, Class 1, nonpower-limited fire alarm, or medium power network-powered broadband communications circuit, unless the optical fiber cable is functionally associated with the other cables. (See NFPA 70-2005, Article 770.133 for additional information.) • Where exposed to contact with electric light or power conductors, the non-current-carrying metallic members of optical fiber cables entering buildings shall be grounded as close to the point of entrance as practical or shall be interrupted as close to the point of entrance as practical by an insulating joint or equivalent device (NFPA 70-2005, Article 770.93). • Conductive and non-conductive optical fiber cable shall be permitted in the same cable runway, enclosure, or raceway with conductors of Class 2 and Class 3 remote-control, signaling, and powerlimited. circuits in compliance with NFPA 70-2005, Article 725; power-limited fire alarm systems in compliance with NFPA 70-2005, Article 760; communications circuits in compliance with NFPA 70-2005, Article 800; community antenna television and radio distribution systems in compliance with NFPA 70-2005, Article 820; and low-power network-powered broadband communications circuits in compliance with NFPA 70-2005, Article 830. (NFPA 70-2005, Article 770.133). • Where fiber optic cabling is used, the fiber optic cable shall be labeled to distinguish it from electrical signal cabling. (See Figure 9-16.) 68P81089E50-B 9/1/05 9-27
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© 2005 MOTOROLA, INC. ALL RIGHTS R
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TABLE OF CONTENTS Chapter 1. Introd
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STANDARDS AND GUIDELINES FOR COMMUN
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CHAPTER 1 INTRODUCTION 1 This manua
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CHAPTER 2 SITE DESIGN AND DEVELOPME
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CHAPTER 3 COMMUNICATION SITE BUILDI
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CHAPTER 4 EXTERNAL GROUNDING (EARTH
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CHAPTER 5 INTERNAL GROUNDING (EARTH
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CHAPTER 6 POWER SOURCES 6 6.1 LOCKO
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CHAPTER 7 SURGE PROTECTIVE DEVICES
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Page 347 and 348: STANDARDS AND GUIDELINES FOR COMMUN
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Page 405 and 406: APPENDIX A ELECTROMAGNETIC ENERGY I
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APPENDIX C PROTECTING AGAINST ELECT
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APPENDIX D GROUNDING (EARTHING) ELE
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APPENDIX E GENERAL CONVERSIONS AND
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APPENDIX F R56 COMPLIANCE CHECKLIST
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I NDEX Index Index AC power cabling
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