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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