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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
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

RCDD (24 decks)

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