Chapter 12 - Outside Plant

Question 1

The ICT distribution designer should design conduits entering from:

• Basement wall to terminate ~ ___ in from the finished wall
• Below grade point to extend ~ ___ above finished floor (AFF)
• Ceiling height to terminate ~ ____ below the finished ceiling

Answer 1

4 inches for these cases

Note: 4in penetration is specified for EFs, as opposed to the 1” to 3” penetration specified for intrabuilding conduit

Question 2

The penetration specified for intrabuilding conduit is:

Answer 2

1in to 3in

Question 3

What are the three locating methods?

Answer 3

• Electronic :signal or tone is placed on utility and receiver detects signal and locates utility based on strength and distribution of radiated field
• Water vacuum: If several layers of utilities are possible, and adequate identification is questionable this is used. Uses a special truck that uses high pressure water spray-vacuum. Also known as soft digging. System will excavate a small 6in wide hole to the desired spots along the routes
• Air vacuum: sends high pressure supersonic air streams into porous soil. Does not damage utilities due to their impermeability. Hole has diameter of 6in to 10in and go go several feet vertically. Another method of soft digging.

Question 4

A ___ interface is the connection between the access provider (AP) and a private network within a building.

Answer 4

Network interface

Question 5

What are the BICSI recommended wall length for terminating space for telecommunications entrance facilities serving up to the following gross floor spaces?

10,000 sq ft
20,000 sq ft
40,000 sq ft
50,000 sq ft
60,000 sq ft
80,000 sq ft
100,000 sq ft

Answer 5

10,000 sq ft = 39ft
20,000 sq ft = 42ft
40,000 sq ft = 68ft 
50,000 sq ft = 90 ft
60,000 sq ft = 95ft
80,000 sq ft = 120ft
100,000 sq ft = 144ft

Question 6

All hardware in manholes must be galvanized. MHs should be equipped with:

Answer 6

• sump pump of at least 13in diameter
• pulling eyes of at least 0.875in diameter
• bonding and grounding provisions
• entry ladder (where feasible)

Question 7

The count level of service diversity assigns circuits:

Answer 7

among different binder groups or fiber tubes within one cable

Question 8

The sheath or cable level of service diversity assign circuits:

Answer 8

among different sheaths or cables

Question 9

The route level of service diversity assigns circuits:

Answer 9

among entirely different cable paths to a building

Question 10

The backbone level of service diversity assign circuits:

Answer 10

among different intrabuilding backbone and cabling

Question 11

If a maintenance hole (MH) is longer than ____, it should be equipped with three covers.

Answer 11

20ft

Use 2 covers if between 12ft and 20ft

Question 12

What is the minimum separation between communications conduit and direct buried power or other foreign conduit?

• Of concrete?
• of masonry?
• of well-tamped earth?

Answer 12

3in of concrete
4 in of masonry
12in of well-tamped earth

Question 13

What is the minimum separation between direct buried telecommunications conduit and pipes (gas, oil, water)?

Answer 13

6 in when crossing

12 in when parallel

Question 14

What is the minimum separation between direct buried telecommunications conduit and street railways?

Answer 14

3.28ft below top of rail

Question 15

What is the minimum separation of direct buried telecommunications conduit and railroads?

Answer 15

50in below top of rail

Question 16

Trenches should be ____ or deeper, with a minimum clearance of ___ from edge of excavated dirt pile to nearest edge of trench.

Answer 16

5ft deep,
2ft clearance
Trench should also be shored, sloped, or stepped to prevent cave-in

Question 17

Terminating conduit at the property line, should have minimum cover depth of __ and prepare for tie-in connections.

Answer 17

Minimum cover depth of 24in

Question 18

Terminating service entrance conduit into the building should be at ___ below finished ceiling, or if coming in below grade to be ___ above finished floor.

Answer 18

4in below finished ceiling

4in above finished floor

Question 19

Limit OSP cabling aerial entrances to small buildings requiring what?

Answer 19

• less than 300 pairs and 100ft or less in length

- no other telecommunications facility entrances

Question 20

When aerial entrances are used, the span from the last pole to the building must not exceed ____.

Answer 20

100ft

Question 21

The termination/transition for OSP cable may not exceed ____ from the point of entrance. Indoor/outdoor rated cables can be installed beyond this length from the point of entrance if approved by the AHJ.

Answer 21

50ft

Question 22

Building larger than ___ must contain a dedicated room for EFs.

Answer 22

100,000 sq ft

Question 23

Where posts and bollards are needed, they should be a minimum of ___ in diameter, filled with concrete, encased to a minimum depth of ___, and extend a minimum of ___AFF or ground level.

Answer 23

4in diameter
36in minimum depth
42in AFF

Question 24

Termination points for entrance facilities (EF) should enter from:

• basement wall to terminate ___ from the finished wall
• below grade point to extend ___ above finished floor (AFF)
• ceiling height to terminate ___ below finished ceiling

Answer 24

4in for all cases.

Note: this is different than the 1in to 3in specified for intrabuilding conduit

Question 25

Pedestals should serve only single-story office or office warehouse structures and should be installed within ___ of each tenant space in buildings of this type of construction.

Answer 25

150 ft

Question 26

Surface mounted cabinets for outside building terminals should be at least:

___ tall
___ wide
___ deep

Answer 26

1m(3.28ft) tall
24in wide
6in deep