construction Flashcards
The load bearing component of an aerial installation
Strand
A loop formed in the cable to compensate for temperature changes
Expansion Loop
Counteracts Horizontal forces placed on poles by the strand and cable
Guy & Anchor
Connects pole hardware to the anchor
Guy
Transfers horizontal stress from the pole to the ground
Anchor
Conduit pipe is usually made from
PVC
PVC
Polyvinyl Chloride
Most common type of hardline connector
Pin Connector
Connector where the cable is fed directly through it
Feed Through
Used to terminate RF Signals
Terminator
Allows strand to be pulled in only one direction
Strand Brake
Prevents unwanted payoff from the Reel
Reel Brake
A portable bonding method used in the stationary reel method
Traveling ground
Strand and cable should pay-off the _______ of the reel
Top
Measures pulling tension on the cable
Dynamometer
Ensures cables are not over tensioned
Breakaway Swivel
Minimizes drag on the cables in the corners & ensures that minimum bending radius is not exceeded
Corner Block
Tension in the cable caused by the mass of the cable & reel brake
Tail Loading
Cable spans______ and greater require two expansion loops
250’
Cable tails should be ________ft
3ft
cable blocks should be placed _____ to _____ on the strand
30ft to 50ft
Expansion loops should be formed on the ______ side of the pole
output
Double lashing is done in these three scenarios
1) two or more cables2) trunk cables3) Street and RR Crossing
The mechanical bender should be kept in place for the first _______ of lashing
50ft
How deep is warning tape buried?
12 inches
When doing a figure eight with fiber, how far apart should the cones be placed?
10-15 paces
Clearance for communications lines above roads, streets or alleys
15.5 ft
Clearance for roads in rural areas where it is unlikely that vehicles will be crossing under the line
13.5 ft
Minimum clearance for telecommunications over residential driveways
11.5 ft
Clearance where a communication line along a road is located relative to fences, ditches, embankments, etc., so that the ground under the line would not be expected to be traveled except by pedestrians.
9.5 ft
NESC Rule that covers the vertical clearances of wires, conductors and equipment above ground, roadway, rail or water services.
NESC Rule 232
Acronym:NESC
National Electrical Safety Code
Required Clearance over Railroads.
23.5 ft
This amount of excess fiber optic cable is stored during construction
5%
Minimum depth of (hardline) CATV
24”
Minimum depth of fiber in innerduct
36”
The minimum depth that power is supposed to be buried under CATV
12”
Consists of safety regulations and procedures issued by ANSI for the practical safeguarding of persons during the installation, operation and maintenance of electric supply and communication lines as well as associated equipment
NESC (National Electrical Safety Code)
NEC article that describes the general requirements for grounding
Article 250
NEC article that deals with communications curcuits
Article 800
NEC article that specifically covers coaxial cable distribution systems
Article 820
NEC article that deals with network-powered broadband communications systems (i.e. powering of the network)
Article 830
This government agencies motto is “to protect human health and to safeguard the natural environment…”
Environmental Protection Agency (EPA)
Communications vertical clearance over roofs inaccessible by pedestrians
3 ft(NESC Rule 234)
Communications vertical clearance over balconies and roofs accessible to pedestrians
10.5 ft(NESC Rule 234)
Communications vertical clearance over swimming pools
22.0 ft(NESC Rule 234)
Required Clearance Between Electric Attachment and Communication Attachment (at pole)
40”(NESC Rule 235)
Required Clearance Between Electric Attachment and Communication Attachment at Midspan (NESC)
30”(NESC Rule 235)
Clearance Between Effectively Grounded Electric Attachment and Communication Attachment (at pole)
30”(NESC Rule 235)
NESC Rule 236 climbing space clearances
24” square bounded by conductors
Vertical clearance between power equipment and brackets which are grounded
30”(NESC Rule 238)
Vertical clearance between power equipment and brackets which are NOT grounded
40”(NESC Rule 238)
Vertical clearance between street light bracket and communications services
20”(NESC Rule 238)
Vertical clearance between street light drip loop and communications services
12”(NESC Rule 238)
Vertical supply conductors shall be guarded with conduit to this height above the highest communication attachement
40” above(NESC Rule 239)
Minimum Clearance between Communication and service drops and any conductor of the power supply at the service entrance
12”
What is used to guide cables from the cable trailer to the strand and is supported by a setup bracket?
Set-up Chute
3/8 inch strand will have an ultimate breaking strength of how many pounds?
6900 pounds
What is the maximum cable bundle diameter, in inches, that a cable “D” size lasher will accommodate?
3 inches
What is the mineral that coats the steel strand?
Zinc
When it is impossible to obtain sufficient right-of-way for a pole guy, this type of guy is used and is constructed from an old power pole and a special bracket.
Push Guy
