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OLD RCDD flashcards > (OLD) €h 5 - Horizontal Distribution System > Flashcards

(OLD) €h 5 - Horizontal Distribution System Flashcards

0
Q

5–1 horizontal pathway

Non continuous pathways =

A

J-hook

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1
Q

5-1 horizontal pathways

Continuous pathways =
2

A
  • Conduit

* containment

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2
Q

5–7

Wet locations =
3

A

Sand
gravel
soil

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3
Q

5–9 considerations for horizontal pathways

Planning purposes =

A

Hallways

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4
Q

5–9 maximum occupant density

Standard floor space allocation =

A

100 ft.² of usable workspace

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5
Q

5–9

BAS =
2

A

Building automation system

density

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6
Q

5–9 BAS

BAS standard floor space coverage =

A

250 ft.²

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7
Q

5–10 cable diameter

4 pr cable =

A

.35in

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8
Q

5–10 cable diameter

2-fiber cable =

A

.18in

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9
Q

5-14 unsuitable conduit

Flexible conduit =
4

A
  • Creep
  • shift
  • sheath damage
  • not recommended
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10
Q

5–14 unsuitable conduit

If flexible conduit must be used =

A

Size increase by one trade size

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11
Q

5-14 acceptable conduit runs

I TS design =

A

Best direct route

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12
Q

5–14 acceptable conduit runs

Continuous section =

A

No longer than 100 feet

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13
Q

5–14 acceptable conduit runs

Pull boxes/pull points =

A

More than 100 feet

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14
Q

5–15 unacceptable conduit runs

Conduit should not be run =

A

Near heat sources

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15
Q

5–19 recommended conduit capacity

Cross-section area formula =

A

.785 x diameter²

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16
Q

5–19 recommended conduit capacity

Q; what is the cross-sectional area if the diameter of the cable is .35? =

A

.785 x (.35)² = .0962

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17
Q

5–19 been radii for conduits

4 pair cable =

A

4 times

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18
Q

5–19 bend radii

Multi-pair copper cable=

A

10 times

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19
Q

5–19 been radii

TBB cable=

A

8 times

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20
Q

5–25 design with conduit bends

If run requires (2) 90° bends =

A

Pull point

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21
Q

5–20 designs with conduit bends

Third 90° bend =

A

Derate the design capacity by 15%

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22
Q

5–20 using three bends in conduit

Third bend may be acceptable =
3

A
  • Not longer 33 feet
  • conduit size increased
  • Bend is 12 inches of cable feed end
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23
Q

5–21 conduit terminations

Protrude through structural floor =

A

1 inch to 4 inch

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24
Q

5–21 completing conduit installation

Complete conduit install =
4

A
  • Clean
  • reamed
  • capped
  • Labeled
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25
Q

5–21 complete conduit install

Equipped with pull cord =

A

200 lb test rating

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26
Q

5–23 points or pull boxes for conduits

Slip sleeve =
2

A
  • Larger than the main conduit

* length 12 times the diameter

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27
Q

5–23 pull points or pull boxes for conduits

Gutter =

A

Busduct

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28
Q

5–24 choosing pull box size

Q: If (5) 4” conduits are entering in one pull box, what is the required width?

A

15+8+8+8+8 = 47”

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29
Q

5–26 two general types of access floors

Standard height =
low-profile floors =

A
  • 6 in or higher

* less than 6 in

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30
Q

5–26 access floor components

Access floor consist =

A

Except longitudinal cross-members (does not belong)

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31
Q

5–26 access floor components

Panel sizes =

A

18” to 24”

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32
Q

5–28 design access floor

General office areas finished floor height =

A

8” or higher

33
Q

5–20 design access floors

HVAC finished floor height =

A

12” or higher

34
Q

5–28 design access floors

Finished floors =

A

Min 2” of free space

35
Q

5–29 load bearing capacity

Uniform load capacity =

A

100 lbf/ft²

36
Q

5–29 load bearing capacity

Concentrated load capacity =

A

2000 lbf

37
Q

5–29 load bearing capacity

General office =

A

50 lbf/ft²

38
Q

5–29 load bearing capacity

Dynamic loads =

A

Falling objects

39
Q

5-31 access floor building structure

Depressed slab =

A

New construction

40
Q

5–31 access floor building structure

Normal slab =

A

Renovated buildings

41
Q

5–32 floor panel coverings

Computer room =

A

High-pressure laminate

42
Q

5–32 floor panel coverings

Office =

A

Factory laminated

43
Q

5–33 access floors

Disadvantages =

A

High initial cost

44
Q

5–35 ceiling distribution systems

Ceiling zone method =

A

904 ft.²

45
Q

5–38 design ceiling system

Min ceiling space =
2

A

3” above conduits

* 12” above tray or raceway

46
Q

5–40 pathway and cable support

Pathways must =
2

A
  • Min of. 3” above ceiling tiles

* sufficient space then 6 inch above ceiling tiles

47
Q

5–40 pathway and cable support

J hooks distance =
100 feet run =

A
  • 5ft apart

* 20 j-hooks

48
Q

5–42 cable tray fittings

Used for changing direction =

A

Except covers (does not belong)

49
Q

5–43 cable tray types

Ladder =

A

Two side rails

50
Q

5–43 cable tray types

Ventilated trough =

A

Ventilated bottom

51
Q

5–43 cable tray types

Ventilated channel =

A

Channel

52
Q

5–43 cable tray types

Solid bottom =

A

Solid bottom

53
Q

5–43 cable tray types

Spine =

A

Rigid spine

54
Q

5–43 cable tray types

Basket tray =

A

Wire mesh

55
Q

5–45 supporting cable trays

Trays and wire ways =

A

Supported on 5 feet centers

56
Q

5–46 ceiling homerun method conduit

One or two boxes =

A

Inside diameter of 1 inch

57
Q

5–46 ceiling homerun method conduit

Three boxes =

A

Inside diameter of 1.25 in

58
Q

5–50 attaching utility columns

Utility poles =

A

10ft, 12ft, 15ft

59
Q

5–60 horizontal cabling system

Horizontal cabling installed =

A

Star topology

60
Q

5–61 horizontal cabling system

Centralize optical fiber cabling =

A

984 ft

61
Q

5–61 centralized optical fiber cabling

Pull through method =
Desktop

A

295 ft

62
Q

5–61 centralize optical fiber cabling

Q: 1000 ft spool / 295 ft pull-through method =

A

3 pulls

63
Q

5–68 duct floor systems

Junction boxes =

A

60 ft

64
Q

5–69 duct system

Distribution ducts =

A

Distributing cables from the TR to specific floor areas

65
Q

5–70 duct systems

Feeder ducts =

A

Connects TR to distribution ducts

66
Q

5 – 70 duct system

Enclosed feeder j boxes =

A

5” handhold opening

67
Q

5–71 feeder duct types

Large lower =

A

Feeders

68
Q

5–71 feeder duct types

Standard Upper=

A

Power

69
Q

571 Feeder duct types

Large upper =

A

Telecommunications

70
Q

5–73 design underfloor ducts

Determining duct size =

A

1 in.² cross-section for each 100 ft.²

71
Q

5–73 design underfloor duct

Feeder duct size =

A

8.9 in.² cross-section for each 800 ft.²

72
Q

5–74 design underground duct

Distribution duct sizes =

A

3.9 in.², 80 feet long

73
Q

5–75 design underground duct

Slab thickness:
one level =
2 level =
Feeder beam concept =

A
  • 5”
  • 7”
  • 7”
74
Q

5–80 terminating ducts

TR duct do not pass =

A

3 inch to 6 inch

75
Q

5–80 terminating ducts

TR duct pass =

A

Elbow

76
Q

5–102 trench duct for under floor

Trench duct cover plates =

A

4 feet long, 38 inch width

77
Q

5–103 removing trench duct cover

Lifting device =

A

Stored in TR

78
Q

5–103 removing trench duct cover

Suction cups =

A

.25” eye bolts

79
Q

5–117 references

TIA-569-B =

A

Pathways and spaces

OLD RCDD flashcards (30 decks)

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