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Structured Cabling 101-AStructured Cabling

Overview

Structured Cabling 101

AgendaStructured Cabling System –

Building Telecommunications Sub-Systems

How do they compare to electrical systems?

Primary Codes Used in North America

Building Codes and Standards What are the differences?

ANSI/TIA/EIA Standards Overview

Structured Cabling 101

AgendaStructured Cabling System –

Building Telecommunications Sub-Systems

How do they compare to electrical systems?

Primary Codes Used in North America

Building Codes and Standards What are the differences?

ANSI/TIA/EIA Standards Overview

The Six Sub-Systems of a Structured Cabling System......

1. Building Entrance

2. Equipment Room

3. Telecomm Room

4. Backbone

5. Horizontal

6. Work Area

1. Electrical Meter Pan

2. Main Switch Board

3. Electrical Branch Panel

4. Electrical Feeders (Riser)

5. Electrical Branch Circuit

6. Electrical Duplex Receptacles

Telecommunications Electrical System

Let’s take a look at each subsystem individually!

Entrance Facility

The entrance facility is the point where outside cabling and services interface with backbone cabling. (The electrical equivalent would be the meter socket/main disconnect switch.)

Service Provider

Equipment Room

The equipment room is the area of the building where incoming cabling interfaces with electronic equipment. It is also the main cross-connect (MC) to the backbone cabling. (The electrical equivalent would be the Main Distribution Panel.)

Telecommunications Room

Telecommunications Room is the area within a building that houses telecommunications/networking equipment, as well as the cross-connection (patch panels) between backbone and horizontal cabling. I.e. Horizontal Cross-connect (HC) (The electrical equivalent would be the circuit breaker panel.)

Backbone

Backbone consists of the pathways and cabling that provide the interconnection between the Building Entrance/Equipment Room and the Telecommunication Rooms. It consists of the mechanical terminations for backbone-to-horizontal cross-connects. (The electrical equivalent would be electrical feeders.)

Horizontal

Horizontal consists of the pathway and cabling that extends between the Telecommunications Room and the Work Area. (The electrical equivalent would be a branch circuit.)

Work Area

Work Area is where personal computers, telephones, printers, etc are located. It also includes equipment cords that connect the device to the horizontal cable.

Structured Cabling 101

AgendaStructured Cabling System –

Building Telecommunications Sub-Systems

Primary Codes Used in North America

Building Codes and Standards, What are the differences?

ANSI/TIA/EIA Standards Overview

Primary codes in North America

NEC National Electrical Code Produced by National Fire Protection Association

(NFPA) Revised every 3 years

NESC National Electrical Safety Code Produced by IEEE Revised every 5 years

CSA Primary code in Canada Closely harmonized with NEC

National Electrical Code

Stated purposes of the NEC Ensures the safety of people and property. Provides proper installation practices for high

and low voltage systems. Adopted in whole or part by most federal,

state and local municipalities. Identifies building space environments. Endorsed by the American National

Standards Institute. Deals with inside plant installations.

National Electrical Safety Code

Stated purpose of the NESC Safeguarding of persons, during installation,

operation, or maintenance of electrical and communication lines and equipment.

Contains basic provisions for safeguarding employees and the general public under specific conditions.

The NESC is not intended as a design specification or instruction manual.

Deals with outside cable installations.

Building Codes

The key purpose of these codes is safety. Generally, the codes do not address

performance of our telecommunications systems.

The codes are promulgated as models, which most local municipalities adopt.

Once adopted as ordinances, the codes have the force of law and are enforced through local building inspectors.

NEC and Communications

NEC communications related requirements

Low voltage and power cables separation Cable supports above false ceilings Grounding requirements Protection equipment for exposed cables Firestopping Cable flame and smoke ratings 50 ft rule for un-rated (OSP) cable Removal of abandoned cable

Codes and standards--NEC

Some cable can’t meet any of these tests: polyethylene (PE) jacketed outside plant cable

TR

air handler plenum

plenum ratingCMP

OFNP

riser ratingCMR

OFNRplus

Firestopping

general purpose ratingCM

OFN

50 foot maximum inside building

NEC: a model safety code for local municipalities

NEC ANSI/TIA/EIA 75 Years+ 15 Years Codes Standards

Codes Vs. Standards

Purpose: Safety Performance

Compliance: Force of law Voluntary

Sanctions: Fines, halt in project Shorter useful life cycle

Structured Cabling 101

Agenda Structured Cabling System – Building

Telecommunications Sub-Systems Primary Codes Used in North

America Building Codes and Standards, What are

the differences? ANSI/TIA/EIA Standards Overview

Go to Structured Cabling 101-B, TIA/EIA Standards Overview presentation