Cable Locating
Underground System
Safety Manual
Underground Cables
Misc. I
Misc. II
Final Jeopardy
100
What are the two main types of locates performed during cable locating operations?
WHAT IS
Active and Passive
100
What should be done prior to pulling cables?
WHAT IS
swab conduits
100
What shall all undergroud circuits and equipment be considered as until disconnected from the source, tested for voltage, effectively grounded, and tagged?
WHAT IS
Energized
100
Cables are generally identified according to what?
WHAT IS
Insulation type
100
According to rule 360, the mechanical protection of supply conductors on a riser pole should extend how far below ground level at the pole?
WHAT IS
12 inches
100
What are the two main types of underground feeds?
What is
Loop Feed and Radial Feed
100
What is the PBT shield transformer bushing color coding and their KV rating
WHAT IS
Red 15kv, Blue 25kv, Black 35kv
200
Which method of active locating is the best and preferred?
WHAT IS
Direct Connect
200
What is a common cause of underground system cable faults
WHAT IS
improper handling and installation of cable
200
What is required to perform energized switching for paralleling operations or to make/break load?
WHAT IS
Load break elbows
200
The layer next to the conductor is called the ____ while the layer next to the concentric neutral or shielding is called the _____?
WHAT IS
Strand sheild and insulation shield(Semi con)
200
!!DAILY DOUBLE!!
Rule 314C explains what circuits must be grounded at padmount transfomers. according to this rule what is the one exception?
WHAT IS
High voltage DC
200
The recommended minimum burial depth of underground cable operating at 7,200 volts is ____ feet?
What is
2.5ft
300
How many inches of clearance do you have on locate on each side?
WHAT IS
18"
300
Excessive pulling tension can result in what three things
WHAT IS
exceeding elastic limit of the conductor, stressing the extruded portions of the cable, excessive sidewall pressure at conduit radius
300
Access to padmounted enclosures operating at greater than ____ shall required ___ conscious acts to open.
WHAT IS
600v and 2
300
Name this cable
WHAT IS
XLPE
300
A conductive communication pedestal and a pad mount transformer must be bonded if they are within ___ of eachother?
WHAT IS
6ft
300
Grounded supply systems should not be operated in excess of ______ volts to ground?
What is
22,000 volts
400
On a short locate is it important to keep your temporary ground perpendicular to the locate?
WHAT IS
No
400
Name four types of transformers which are used in underground systems
WHAT IS
Padmount, Submersible, Direct-buried, Vaulted
400
When responding to an outage call, you find the bayonet fuse opened and are not sure of the cause, how should you proceed?
WHAT IS
you should not re-install bayonet fuse until you have tested and verified the transformer is not bad otherwise you must take an outage to re-install the fuse then re-energize from a remote location
400
What are the shields main purpose in underground cables
WHAT IS
To evenly distribute the electric field
400
what is the purpose of annular stranded conductor?
WHAT IS
to combat the "skin effect" because AC flows more concentrated near the outer surface of a conductor
400
Fellow workers and by standers should be kept ____ feet away from working equipment. This is also known as the danger zone.
What is
6ft
500
How could a fence or metal object distort a signal formed with transmitter?
WHAT IS
metal mass will steal the signal and return it when done
500
Name all six main components that an underground system would contain
WHAT IS
Conduits or Ducts, Manholes, Cables, Vaults, Risers,Transformers
500
What are the five steps for removing a bay-o-net fuse?
WHAT IS
1)operate pressure relief valve
2)Stand to side of transformer place shotgun stick in eye
3)Break seal by unlocking fuse eye and rotating it back and forth
4)Slowly pull out fuse avoiding dripping oil outside of drip pan
5)As the tube comes out of transformer rest it on the drip pan before pulling away from transformer
500
What does TR-XLPE and EPR stand for?
WHAT IS
Tree-retardant Cross-linked polyethylene and Ethylene Propylene Rubber
500
What are all four types of hazards lineworkers encounter when working on de-energized cables?
WHAT IS
1)Accidental re-energization
2)Induced voltage
3)Transfer of potential
4)Capacitor effect
500
What three reasons is positioning of the cable reel important?
What is
1)To minimize cable flexing during pulling
2)To avoid reverse bends in the cable
3)To permit payoff of cable at controlled rate