Misc Learning Modules Flashcards
Max length for patch cords in the cross connect?
6m
Cable rating for plenum use?
FT 6
RG-59 is limited to what distance?
61m or 200ft
RG-6 is limited to what length?
152m or 500ft
What is the cable run from the work area to the telecommunication closet called?
Horizontal cabling
It usually runs horizontally along the floor or ceiling.
What should horizontal pathways avoid being located near?
Power cabling, fluorescent lighting, etc.
These can cause interference with data or voice communications.
How many cabling runs should there be from the telecommunications closet to each work area?
At least two cabling runs
This ensures both data and voice connections.
What are the wiring requirements for the two horizontal cabling runs?
- One four-pair 100 Ω UTP
- A second four-pair 24 AWG 100 Ω UTP, two-pair 150 Ω STP, or two-strand, 62.5/125 μm hybrid cables meeting TIA-568-C standard
- Coaxial cable (allowed but not part of a compliant system)
UTP stands for Unshielded Twisted Pair, STP stands for Shielded Twisted Pair.
What is the maximum length for horizontal UTP cabling?
90 m (295 ft.)
Cross-connect jumpers and patch cords should not exceed 6 m (20 ft.).
What is the maximum length for patch cords and cross-connect jumpers in a horizontal channel?
Up to 10 m (33 ft.)
What is the typical area of work areas in telecommunications?
Up to 10 square metres (100 square feet)
This includes components extending from the work area outlet to the equipment.
What are some considerations for planning work area cabling?
- Patch cords designed for easy routing changes
- Patch cords with the same connectors on both ends
- Copper patch cords constructed with stranded cable for flexibility
- Maximum horizontal cable length assumes a patch cord length of 3 m (10 ft.)
- Each work area should have two telecommunications outlets/connectors installed
What are the purposes of codes and standards in telecommunications installations?
- Prevention of fire and shock hazards
- Protection of life, health, and property
- Proper maintenance and operation
What are the benefits of standards in telecommunications?
- Design and installation consistency
- Adherence to physical and transmission line requirements
- Basis for examining proposed system expansion or changes
- Uniform documentation
- Warranty
What is the main standard governing telecommunications wiring?
ANSI/EIA/TIA-568-C
This refers to the American National Standards Institute, Electronic Industries Association, and Telecommunications Industry Association.
What is the Canadian standard that references ANSI/EIA/TIA?
CSA Standard T568.2-05 (2010)
Telecommunications Cabling System in Commercial Buildings.
How often does the American National Standards Institute (ANSI) require standards to be reviewed?
Every five years
What was a major result of the last ANSI review process?
Division of the previous edition ANSI/TIA-568-B Standard into four new main documents
What does the new ANSI/TIA-568-C series include?
- ANSI/TIA-568-C.O, ‘Generic Telecommunications Cabling for Customer Premises,’ published 2009
- ANSI/TIA-568-C.1, ‘Commercial Building Telecommunications Cabling Standard,’ published 2009
What is the name of the device that controls the motor power in this context?
Harsepowar
Refers to a specific type of motor control device.
What is the rating of the toggle switch starter at 230V?
1hp
Indicates the power handling capacity of the toggle switch starter.
What is the power rating of the drum switch at 240V?
3hp
This determines the maximum horsepower the drum switch can handle.
What is the rating of the push button starter at 230V?
5hp
This indicates the maximum power capacity of the push button starter.
What should be used to test the motor and control circuit?
Megger
A megger is an instrument for measuring insulation resistance.
