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Flashcards in Structured Cabling T1 Deck (22):
1

A BNC connector is used most commonly for data applications when using what type of wiring and/or cabling?

B. Coaxial

2

What code standard is used for bonding requirements?

a. NEC Article 250

3

What is the purpose of firestop products?

To stop the spread of fumes and contain fire.

4

What are the frequency bandwidths for the following cable categories?

Cat 5e: 100mHz; Cat 6: 250mHz; Cat 6A: 500mHz

5

What are some things that you can do to a communications cable that will decrease the performance of the cable?

Kink, flatten, over-bend, tie-wrap too tightly

6

What is the minimum bend radius for 4 pair UTP cable under no load with a diameter of 1/4"?

1"

7

When is it permissible for communications cable to share a cable tray with conductors for power and lighting?

As barriers for separation

8

Why is the location of the equipment rooms important to the performance of the equipment and wiring?

Central location and size of room

9

What is the ANSI/TIA/EIA requirement for pull boxes?

Length is over 100, more than 2 90° bends, U-shaped bend in run.

10

A second telecommunications room shall be added when the area to be served exceeds ___ and they shall be connected by a ___ firestopped conduit.

Answers: 295ft and 3"

11

What are the quantities of 4-paire cables that can be terminated on a 66 block and a 100 block?

12 pair and 24 pair

12

Structured cabling is designed and installed according to the ____ topology

STAR

13

What causes attenuation to increase in a twisted pair cable?

longer cable, greater attenuation

14

What is the difference between a UTP cross-connect wire and UTP patch cord?

The pin outs on the end

15

In a telecommunication room, what are the requirements for plywood coverage and ground?

6 guage stranded copper and a grounding bus bar

16

All metallic cable shields and metallic elements of fiber optic cables should be grounded no more than 50ft from the entry point of the cable/fiber.

50 feet

17

What is the purpose of twisting a pair of wires in a cable assembly?

decrease crosstalk

18

Define the following terms:
Attenuation
NEXT
Crosstalk
Capacitive Coupling

Attenuation: Insertion loss - signal loss over a distance.
NEXT: Causes undesired leakage from transit pair "crosstalk" onto near-end receive pair of cabling.
Crosstalk: Unwanted reception of signals induced on a communication line.
Capacitive Coupling: Same twist lengths/transfer of energy.

19

What does the Intra-Building Backbone Pathway Sleeve Method require per 40,000 sq ft of usable floor space:

five 4" sleeves

20

What is the purpose of telecommunications electrical protection devices:

Protect the equipment and property from voltage spikes and current.

21

How is fiber optic bandwidth measured?

Hertz/Meter

22

How many pairs are there in each binder group of a multi-pair UTP cable?

25 pair