Chapter 12 OSP

Question 1

When sizing Underground Entrance Conduits, a minimum of ________ should be specified.

Answer 1

(4) 103 metric (4 trade size)

Question 2

One spare _______ conduit should be considered for each ______________.

Answer 2

4 trade size
Telecommunications service entrance point

Question 3

OSP allowed fill ratio

Answer 3

N/a

Question 4

Innerducts

Answer 4

Used to maximize amount of cable that can be placed in an underground OSP pathway

Question 5

Innerduct requirements

Answer 5

Each should be equipped with a pull cord/tape

Copper conductor should be installed within the conduit system for locating purposes when non-metallic fiber is installed

In compartmentalized innerducts, a pull cord should be in each

Question 6

Additional OSP conduits could be required to meet other needs such as

Answer 6

Separation of services including:
Video
Tie cables
Dual feeds for diverse paths/redundancy
Secure circuits w/ sensitive info
Misc. circuits (fire, security)

Question 7

Terminating space must have plywood backboard sized according to the

Answer 7

space served

Question 8

A building larger than 100k sq. Ft must contain a dedicated room for EF. The size of the room is determined by:

Door requirements:

Answer 8

Type of facility
Terminating hardware selected
Neccessity for electrical protection

Open outward
Lockable with access control
Have same fire rating as room
Min. Size of 3’x6.5’

Question 9

EF conduit entering design specs

Answer 9

4” from wall
4” above floor
4” below ceiling

Question 10

Intrabuilding vs EF penetration/ conduit sizing

Answer 10

EF = 4”
Intrabuilding = 1-3”

Question 11

Main considerations when designing an aerial entrance

Answer 11

Proper clearance and separation from power lines

Question 12

Unground conduit minimum depth

Answer 12

24”

Or below the 50 year frost line where frost can damage cable

Question 13

Encase underground conduit in concrete when

Answer 13

Min depth cant be attained
Conduits pass under roads, driveways, or tracks
Bend points might be subject to movement
Directed by owner

Question 14

Shoring requirements for trench 5’ or more deep

Answer 14

Be shored to prevent cave in
Have a minimum clearance of 24” from edge of excavation dirt pile to the nearest edge of trench

Question 15

Minimum separation between telecom conduits and other foreign/power conduit in a joint trench

Answer 15

3” of concrete
4” of masonry
Or 12” of well tamped earth

Question 16

Minimum separation between telecom conduits and street railways in a joint trench

Answer 16

1m or 3.28’

Question 17

Minimum separation between telecom conduits and railroads in a joint trench

Answer 17

50” below top of rail