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111 © 2002, Cisco Systems, Inc. All rights reserved.

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Presentation on theme: "111 © 2002, Cisco Systems, Inc. All rights reserved."— Presentation transcript:

1 111 © 2002, Cisco Systems, Inc. All rights reserved.

2 Cisco Networking Academy ProgramCopyright 2004Panduit Network Infrastructure Essentials

3 Cisco Networking Academy ProgramCopyright 2004Panduit Network Infrastructure Essentials Chapter 1 Cabling and Safety Overview

4 Cisco Networking Academy ProgramCopyright 2004Panduit Network Infrastructure Essentials Chapter Objectives Learn about the Cabling Industry and the Cabling Job Market Examine Safety Codes and Standards Discuss Safety Around Electricity Discuss Lab and Workplace Safety Practices Learn about Personal Safety Equipment

5 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Analog Telephony A telephone network needs a cable run between each residence or business and a central telephone office With the popularization of the telephone, the quality of the connection became important. At the same time, the need to standardize installation practices, equipment, and materials was realized

6 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Voice Cabling Typically, telephone cabling consists of two wires These two wires are twisted around each other to prevent signals from one pair leaking into the other. This type of wiring is called twisted-pair

7 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Structured Cabling The concept of using a single wiring scheme to handle all voice, data, and other services like video is called structured cabling Structured cabling also includes all the devices that cable is pulled through, the equipment to which the cable is terminated, and electronic devices that connect users and resources

8 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Emerging Cable Technologies Fiber-optic is a type of cable that uses pulses of light to transmit data through glass threads Wireless uses radio or microwave signals as a tool for transmitting data or voice High-speed access technologies: Cable TV has great potential as a bandwidth delivery mechanism Digital Subscriber Line (DSL) is a group of technologies that uses carrier signals on the existing wires of the telephone system to carry high-speed digital data

9 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Costs of Poor Cabling The job of the cable installer is to provide good, technically accurate cabling between all of the communications devices that make up the network It is more economical for customers to pay a little more up front to make sure the job is done right, conforms to standards, and is scalable Network administrators waste time troubleshooting problems caused by poor installation

10 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Cabling Industry Jobs Entry-level installer Installation supervisor Project manager Cabling design engineer Marketing representative

11 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Education Some employers may offer a tuition reimbursement program, or there may be training available through a local union or labor organization Most technical schools are interested in hiring experienced people from the industry to help teach their students

12 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Safety Codes Employee safety - Stay alert, think ahead, and wear appropriate protective gear to help stay safe Workplace safety - Work with others in a way that does not endanger them Public safety - Take precaution in all work conditions

13 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Public Safety Organizations National, state, and local codes - Follow all building codes, whether they are on the local, state, or national level

14 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Electrical Safety Cable wiring works with low-voltage, but nearby network and electrical equipment run on volts, which is dangerous

15 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Hazardous Voltages Hazardous voltages can be found in unfinished spaces and access areas such as those found above ceilings, in equipment rooms, or in telecommunications rooms

16 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Electrical Safety Keep an eye out for abnormal circumstances such as circuit breaker boxes with the covers removed, frayed or loose cords, and damaged equipment Pay particular attention to other devices and other workers in the work area Never touch a cable that might be "live" with both hands, because a complete circuit could be formed. Always keep one hand off of the cable

17 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Precautions Around Lightning All outside equipment must be properly grounded Avoid wiring in or near damp areas Never install or connect copper wiring during an electrical storm

18 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Voltage Safety Check Before starting any job, test nearby cables for voltage levels using a multimeter or voltage tester

19 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Proper Grounding Proper grounding provides: Protection from high voltages Power faults such as electrical shorts A proper path for lightning Dissipation of electrostatic charges A zero volt reference for signaling and metering voltage

20 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials GFCIs Ground Fault Circuit Interrupters (GFCIs) stop the flow of electrons and reduce the hazard of electrical shock and fire. These devices protect personnel, buildings, and the lab from harmful electricity

21 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Purpose of Grounding Properly installed grounding will: Minimize electrical surge (spike) effects Maintain the integrity of the electrical grounding plant Provide a safer and more effective path to ground

22 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Grounding Standards The National Electric Code (NEC) has standards for grounding which must be followed by all installers and electricians working in the United States International installers and electricians should check with local governments as to the grounding standards in their countries

23 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Six Feet of Separation Rule Allow 6 feet, or 1.8 m, between voice and data cabling and high-voltage wiring The noise from electrical circuits or devices, known as electromagnetic interference (EMI), can interfere with data signals, thus distorting them and causing general communications problems It minimizes the possibility of accidental contact with hazardous voltages

24 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Electrostatic Discharge Electrostatic discharge (ESD), more commonly known as static electricity, can be the most damaging and uncontrollable form of electricity Static electricity shocks can be disastrous for computers Good grounding can prevent damage from static electricity because they pass static bursts to the ground

25 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Preventing ESD Always wear wrist straps when working inside computer equipment Set computer equipment on ESD protective mats when working inside them Use a humidifier when working in a cool, dry environment

26 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials ESD Workspace

27 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Lab and Workplace Safety Turn off power before working inside walls, ceilings, or attics Never touch power cables Be aware of sharp objects, exposed wires, dirt, and dust Be aware of other people working in the area

28 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Work Area Safety Survey work area beforehand Ask building supervisor if you could come in contact with dangerous materials (chemicals, asbestos, or lead) Keep area clean and neat Locate fire extinguishers Use fire-rated cables in plenum areas and riser cables between floors

29 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Other Work Area Hazards Water Weather Noise Fumes Heights Rodents and insects

30 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Ladder Safety Select the right ladder for the job Inspect the ladder Set the ladder properly and safely, and secure the area around the ladder Climb and descend cautiously Work on the ladder safely

31 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Fiber-Optic Safety Always wear safety glasses with side shields Always work in a well-ventilated area Place a mat on the table to collect all glass shards. Use masking tape to remove glass shards from hands and clothing Do not touch eyes while working with fiber-optic systems Clean work areas thoroughly, and dispose of glass shards in proper, approved sharps containers

32 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials First Aid Kit Every work area should have a first aid kit available Periodically check that it is fully stocked Make sure that it contains an eye wash cup for debris

33 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Fire Safety Call for help immediately if the fire cannot be quickly and safely extinguished Notify others in the building that there is a fire by activating the fire alarm or yelling “Fire!” Only fight a small fire if you are certain that it is safe to do so

34 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Fire Extinguisher Ratings A – Ordinary materials (burning paper, lumber, cardboard, plastics) B – Flammable and combustible liquids (gasoline, kerosene, solvents) C – Electrical equipment such as appliances, switches, panel boxes, and power tools D – Combustible metals such as magnesium, titanium, potassium, and sodium

35 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Injury Prevention Follow all national, industry, and workplace safety rules Training is essential when working with electricity, power tools, or any other potential hazardous equipment Use safety equipment Be alert and act professionally Stay current on issues related to safety and health in the workplace

36 Cisco Networking Academy ProgramCopyright 2005Panduit Network Infrastructure Essentials Personal Safety Equipment Wearing protective clothing and gear can prevent an injury or make one less severe Safety goggles Ear plugs and muffs Respirators and dust masks Protective gloves Work boots Hard hat

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