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RCDD > Ch. 5 * (Horizontal Distribution Systems) > Flashcards

Ch. 5 * (Horizontal Distribution Systems) Flashcards

0
Q

Usable floorspace includes ___

A

Hallways

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1
Q

Wet locations are considered ___

A

Slabs and direct contact with soil sand and gravel

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2
Q

Work area

A

100 sq’

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3
Q

BAS density

A

250 sq’

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4
Q

4 pair copper diameter

A

.35”

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5
Q

2-Fiber diameter

A

.18”

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6
Q

Flexible (unsuitable) conduit tends to ___

A

Creep
Shift
Cause sheath damage

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7
Q

Acceptable conduit runs

A 
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
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8
Q

Unacceptable conduit runs

A

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

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9
Q

TBB

A

6 AWG

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10
Q

Ground bend rate

A

8X O.D.

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11
Q

Bend radius of multipair

A

10X O.D.

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12
Q

UTP bend radius

A

4X O.D.

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13
Q

Install a pull box if ___

A 
More than (2) 90° bends
Reverse bend between 100° and 180°
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14
Q

A completed conduit installation should be ___

A 
Clean 
Reamed 
Capped
Labeled
Have a pull cord rated for 200lbs.
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15
Q

Slip sleeve

A

Larger than main conduit

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16
Q

Slip sleeve length

A

12 times the diameter of the largest conduit

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17
Q

Space requirements for (5) 4” conduits

A

47”

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18
Q

Access floor consists of ___

A 
Footings 
Pedestals 
Stringers 
Modular floor panels
Except "longitudinal crossmember"
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19
Q

Height of access (raised) floors

A

General office areas - 8”

Computer room - 12”

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20
Q

Depressed slab

A

New construction

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21
Q

Normal slab

A

Renovated building

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22
Q

Load bearing capacity for access (raised) floors

A

Equipment room - 100lbs./sq’

General office - 50lbs./sq’

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22
Q

Disadvantages of access (raised) floors

A

High initial cost

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24
Q

Ceiling zones

A

904 sq’

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24
Q

Low profile floor

A

Less than 6”

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26
Q

Ceiling space

A

3” above conduits

12” above tray or raceway

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27
Q

Access floor minimum requirements

A

2”

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28
Q

Cable support pathways should be installed ___

A

At least 3 inches above the ceiling tiles

29
Q

J-hooks should be spaced

A

Every 5 feet

30
Q

A 100 foot cable run should have ___ j-hooks

A

20

31
Q

Cable tray fittings include:

A 
Elbows 
Reducers 
Crossovers 
Tees
Except "Cover"
32
Q

Types of cable trays

A 
Ladder - two side rails
Ventilated trough - ventilated
Ventilated channel - channel
Solid bottom - solid
Spine - spine
Basket tray - wire mesh
33
Q

Trays/Wireways should be supported ___

A

5’ on center

34
Q

Ceiling home run conduit method

A

One or two boxes = 1”

Three boxes = 1.25”

35
Q

Another name for power pole

A

Utility column or Utility pole

36
Q

Utility pole sizes

A

10’
12’
15’

37
Q

Centralized fiber

A

984’

38
Q

Fiber to the desktop

A

Pull through method

39
Q

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

A

3 pulls

40
Q

Pull through method

A

295’ (90m)

41
Q

J-Box

A

60’

42
Q

Hand hole

A

5”

43
Q

Large lower duct

A

Feeders (from electrical panels and TRs)

44
Q

Standard upper ducts

A

Electrical power service

45
Q

Large upper ducts

A

Telecommunications services

46
Q

Duct sizing

A

1sq”/100sq’

47
Q

Feeder beam slab thickness

A

7”

48
Q

The duct elbow should extend __ AFF in TR

A

4”

49
Q

Standard for spaces/pathways

A

569-B

54
Q

Where do you store lifting devices for cover plates?

A

In the TR
Section cups
Eye bolts

55
Q

Trench duct cover plates

A

4’ x 38”

56
Q

TR duct in floor

A

Elbow into room

57
Q

TR duct size

A

3-6”

58
Q

Distribution duct size

A

3.9 sq”

59
Q

Cross-sectional area of cable

A

.35 sq” x .785

60
Q

Non-continuous pathway

A

J-hook

61
Q

Continuous pathway

A

Conduit

62
Q

Feeder duct size

A

8.9 sq”

63
Q

Feeder ducts

A

Connect TR to distribution ducts

64
Q

HVAC floor height

A

12”

65
Q

Distribution duct

A

Floor

66
Q

Load bearing for concentrated raised floor

A

2000 lb/ft

67
Q

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

A

Equal to height of finished floor

68
Q

Horizontal pathways do not include ___

A

Pull boxes

69
Q

1.5” conduit can accommodate ___ .23” diameter cables

A

18

70
Q

What is not always part of an access floor?

A

Stringer

71
Q

Horizontal cabling runs may contain ___

A

One of the following:

TP, CP, HCP

72
Q

Ventilated trough has ___

A

Side rails

73
Q

How many 0.23” cables in a 4” conduit?

A

113

RCDD (24 decks)

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