Ch. 5 * (Horizontal Distribution Systems) Flashcards Preview

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Flashcards in Ch. 5 * (Horizontal Distribution Systems) Deck (70)
0

Wet locations are considered ___

Slabs and direct contact with soil sand and gravel

1

Usable floorspace includes ___

Hallways

2

Work area

100 sq'

3

BAS density

250 sq'

4

4 pair copper diameter

.35"

5

2-Fiber diameter

.18"

6

Flexible (unsuitable) conduit tends to ___

Creep
Shift
Cause sheath damage

7

Acceptable conduit runs

Direct route
Parallel to bldg
No single bend greater than 90°
No more than 100 feet between pull boxes
No more than 180° of bends between pull boxes

8

Unacceptable conduit runs

Should not be on top of cellular floor cells
Should not be run crosswise to cellular floor cells
Should not be run through flammable material storage areas
Should not be near heat sources

9

TBB

6 AWG

10

Ground bend rate

8X O.D.

11

Bend radius of multipair

10X O.D.

12

UTP bend radius

4X O.D.

13

Install a pull box if ___

More than (2) 90° bends
Reverse bend between 100° and 180°

14

A completed conduit installation should be ___

Clean
Reamed
Capped
Labeled
Have a pull cord rated for 200lbs.

15

Slip sleeve

Larger than main conduit

16

Slip sleeve length

12 times the diameter of the largest conduit

17

Space requirements for (5) 4" conduits

47"

18

Access floor consists of ___

Footings
Pedestals
Stringers
Modular floor panels
Except "longitudinal crossmember"

19

Height of access (raised) floors

General office areas - 8"
Computer room - 12"

20

Depressed slab

New construction

21

Normal slab

Renovated building

22

Load bearing capacity for access (raised) floors

Equipment room - 100lbs./sq'
General office - 50lbs./sq'

22

Disadvantages of access (raised) floors

High initial cost

24

Ceiling zones

904 sq'

24

Low profile floor

Less than 6"

26

Ceiling space

3" above conduits
12" above tray or raceway

27

Access floor minimum requirements

2"

28

Cable support pathways should be installed ___

At least 3 inches above the ceiling tiles

29

J-hooks should be spaced

Every 5 feet

30

A 100 foot cable run should have ___ j-hooks

20

31

Cable tray fittings include:

Elbows
Reducers
Crossovers
Tees
Except "Cover"

32

Types of cable trays

Ladder - two side rails
Ventilated trough - ventilated
Ventilated channel - channel
Solid bottom - solid
Spine - spine
Basket tray - wire mesh

33

Trays/Wireways should be supported ___

5' on center

34

Ceiling home run conduit method

One or two boxes = 1"
Three boxes = 1.25"

35

Another name for power pole

Utility column or Utility pole

36

Utility pole sizes

10'
12'
15'

37

Centralized fiber

984'

38

Fiber to the desktop

Pull through method

39

1,000' spool of fiber (pull through method)

3 pulls

40

Pull through method

295' (90m)

41

J-Box

60'

42

Hand hole

5"

43

Large lower duct

Feeders (from electrical panels and TRs)

44

Standard upper ducts

Electrical power service

45

Large upper ducts

Telecommunications services

46

Duct sizing

1sq"/100sq'

47

Feeder beam slab thickness

7"

48

The duct elbow should extend __ AFF in TR

4"

49

Standard for spaces/pathways

569-B

54

Where do you store lifting devices for cover plates?

In the TR
Section cups
Eye bolts

55

Trench duct cover plates

4' x 38"

56

TR duct in floor

Elbow into room

57

TR duct size

3-6"

58

Distribution duct size

3.9 sq"

59

Cross-sectional area of cable

.35 sq" x .785

60

Non-continuous pathway

J-hook

61

Continuous pathway

Conduit

62

Feeder duct size

8.9 sq"

63

Feeder ducts

Connect TR to distribution ducts

64

HVAC floor height

12"

65

Distribution duct

Floor

66

Load bearing for concentrated raised floor

2000 lb/ft

67

When using depressed slab for access flooring the depth should be ___

Equal to height of finished floor

68

Horizontal pathways do not include ___

Pull boxes

69

1.5" conduit can accommodate ___ .23" diameter cables

18

70

What is not always part of an access floor?

Stringer

71

Horizontal cabling runs may contain ___

One of the following:
TP, CP, HCP

72

Ventilated trough has ___

Side rails

73

How many 0.23" cables in a 4" conduit?

113