Ch. 5 * (Horizontal Distribution Systems) Flashcards Preview

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