What does a qualified electrical employee mean?
An employee who by reason of experience of instruction is familiar with the operation to be performed and the hazards involved
**APM Definitions
What does a qualified electrical worker mean?
An employee with a minimum of two years training and experience with high voltage circuits and equipment and has demonstrated by performance is familiar with the work and hazards involved
** APM Definitions.
What’s the minimum depth of a trench that can be entered without shoring?
5 feet
** APM Rule 146 Trenches and Excavations
How many pipe straps are required per 10 foot section of riser?
3 straps
** DUG CR 110.1 note 7
How many unit struts are required per 10 foot section of riser?
2
** DUG CR 110.1 note 8
How soon should a hazard be reported?
Immediately
** APM P-18 Reporting Hazards
How often should high-voltage rubber blankets be dielectrically tested or inspected?
Rubber gloves, sleeves, and blankets used on high-voltage conductors shall be directly tested at least once every six months.
** APM Rule 131 uh
What should be done when using rubber blankets on the ground?
When using rubber blankets on the ground they shall be protected from physical damage and moisture by means of tarpaulin, canvas or protective mat.
** APM Rule 131
What is the minimum amount of time to wait before entering an underground structure when new cable has been energized for the first time?
5 minutes.
APM Rule 303 Energizing Equipment.
According to the APM what shall be done prior to and after moving or bending any in-service cable?
The cable shall be carefully inspected before and after moving
** APM Rule 307 Moving Underground Cable
When will the automatic circuit reclosure on an underground circuit being worked be made non-automatic?
- Splicing or patching energized high-voltage UG cable
- Relocating energized high-voltage underground cable or equipment
- filtering or replacing oil on energized high-voltage underground equipment
- Operating load break elbows
- Whenever the supervisor deems necessary
** APM Rule 316
Why is it necessary to use a live line voltage tester?
To test normally energized parts of a circuit as de-energized.
** APM Rule 141 Grounding.
When distribution personnel work inside a station who takes the clearance?
And Operator, shift supervisor, or station electrician on duty
** APM Rule 707
Can 600 amp plug-in terminations and components be removed by hand if they have been tested de-energized with a high voltage tester?
No, Live line tools are required for removing and installing 600 amp plug in terminations except when complying with applicable sections of rule 306
** APM Rule 312
What 7 things are required on a cable tag?
- Adjacent switch position
- Adjacent switch number
- Adjacent switch structure number
- Next adjacent through structure number.
- Next adjacent structure footage
- Direction to next adjacent structure.
- Operating voltage.
Ex. From gs12 pos 3 @ v29 to v30 200’ W 12kv
** DUG IC 130.4.1
An SF6 gas switch inside a vault is suspected to have catastrophically fail what additional atmospheric monitoring is required prior to entering this vault?
Testing for sulfur dioxide.
DOM TE -13 2.1
What does the oxygen tester test for?
For combustible gas, oxygen, hydrogen sulfide, carbon monoxide, and oxygen.
*** DOM TE -13 2.1
What depth should a CIC riser extend below grade?
45” minimum.
DUG CR 120-1
When working in or around vaults what precautions must be made?
- Atmospheric testing and monitoring
- Barricades
** APM RULE 301 other confined spaces.
After de-energizing and before proceeding with the work on all power supply cables normally energized in excess of 600 V where should all conductors be short-circuited and grounded?
Between the place where the work is being performed and each possible source of supply.
** APM RULE 306 working on de-energized ug cable.
Identify the four conditions required to create a potential for ferroresonance.
- The transformer has a phase to phase primary or wye primary with a UG neutral
- phases are de-energized or energized one phase at a time.
- secondary load on radial is insignificant compared to the cable length being switched.
- when the length of the cable is greater than or equal to the length of the coils in the transformer.
- cable and coil being de-energized or energized at the same time.
** DOM TR-8
Switch may be considered de-energize for switching only when what conditions exist?
Switch contains one circuit and is in a dead section of the line verified through switching center.
*** APM RULE 309 UG switches
Name the four ways to eliminate ferroresonance including design considerations?
- gang operated switches
- energize or de-energize cable separate from coils
- secondary load.
- phase to ground primary connections.
** DDS -2 5.13 B
Explain how and when to address back feed.
- there’s a possibility of backfeed when touching the deenergized high voltage side of the transformer (or wires connected to the high side of the transformer) that is still connected to the secondaries.
- eliminate with an open or grounding
APM RULE 149 grounding.
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random need to knows87
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Switchs/switching18
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Grounding12
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Tools/equipment9
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2nd Step Questions89
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Rigging7
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Transformers11
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Underground25
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Substation4
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Theory17
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Amperages42
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Dead End Tensions20
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3rd Step46
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3rd Step Test Sudy Guide34
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4th Step Study Guide62
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5th step5
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Capacitor Banks0
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5th Step Questions19
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6th Step9
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Apm rules46
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meter and service requierments10
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OH construction60
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1st step questions116
