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Self Study Questions > 5th step ssq > Flashcards

5th step ssq Flashcards

1
Q
  1. What are the minimum and maximum lengths for a mid-span tap?
A

4 feet minimum
7 feet maximum
Reference: DOH, Figure DC 590-1

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2
Q
  1. Explain APM Rule 147: Working Distance.
A

a. No employee shall approach or take any conductive object, except with approved devices, closer to unprotected energized parts than as prescribed by the APM.
0-300V- avoid contact
301-750- 1’1”
.750-5kV- 2’1”
5.1-15 kV- 2’2”
15.1-36 kV - 2’7”
b. Approach distances may be reduced, provided adequate approved protective devices are used. Such protection shall be applied and removed with approved insulating devices.
C.Contact must not be made with protective devices on conductors energized above 7,500 volts except with live line tools.
EXCEPTION: Employees certified in rubber gloving of conductors energized between 7,500 volts to 17 kV may contact protective devices up to 17 kV while wearing rubber gloves rated for the voltage and while utilizing “insulate and isolate” work practices.
Reference: APM Rule 147 minimum approach distance

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3
Q
  1. What are the clearance requirements for guy and span wires passing conductors supported on the same pole (incidental wiring ), given the following supply conductor voltages:
    a. 0 - 750 V
    b.4 kV
    C.12 kV
    D. 16kV
    E. 33kV
A

a. 0 - 750 V
b.4 kV
C.12 kV
D. 16kV
E. 33kV
A.3 inches
B. 6 inches
C.9 inches
D. 9 inches
E. 12 inches
Reference: G.O. 95, Section III, Table 2, Case 19

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4
Q
  1. Explain APM Rule 104: Live Line Tools
A
  1. Live Line Tools
    a. All work requiring the use of live line tools must be performed in accordance with applicable Accident Prevention Rules.
    b. All live line tools must be approved by the OU before being put into use. No alterations must be made without approval.
    c. Live line tools must be visually inspected for defects before use each day. Tools to be used must be wiped clean and if defects are indicated such tools must not be used.
    d. Live line tools must be taken out of service biennially for an inspection following OU procedures
    Reference: APM Rule 104 Live line tools
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5
Q
  1. Before using grounds, what does the inspection process entail?
A

Groud cable inspection:
Inspect the ground cable for cuts, nicks, and abrasions that may have penetrated through the jacket into the conductor and, if suspect, inspect the conductor for broken strands or visual signs of corrosion.
Inspect for kinks that could possibly damage the strands.
Ensure ground cable is not damaged, for example, (flattened).
Inspect for swollen cable jacket or soft spot for indication of internal corrosion or damage to strands.
ground clamp:
Ensure all components are in place and tight.
Loose threaded ferrule connections to the clamp assembly shall be tightened before use.
Ensure ferrules and clamps are not cracked or broken.
Visually inspect the crimped ferrule on the end of the conductor for broken strands or visual signs of corrosion.
Inspect for indications of corrosion at the threaded connection, hinge points or any other surfaces of the clamp.
Reference: Overhead Grounding Manual, 3.3.1.1

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6
Q
  1. Describe the visual inspection criteria for hot sticks.
A

Visual inspection shall include a check for obvious signs of deterioration that are likely to
negatively affect the insulating characteristics or safe operation, such as:
-Deep or significant:
-Scratches, Cracks, Chips, Gouges
-Holes
-Splintering
-Abrasions penetrating into the core
-Flaking
-Dulled surface/deteriorated finish (blooming)
-Other conditions affecting safe operation, which may include:
-Missing or loose end caps
Bent rivets or bolts
-Excessive wear on metal parts
-Bent or otherwise damaged parts
-Improperly functioning attachments, latches, levers, etc.
If a live line tool shows signs of damage and the user is not confident that it can be used safely, it must be removed from service and put aside for inspection and/or disposal.
Prior to sending live line tools in to be repaired, contact the appropriate Construction Methods group for approval.
Reference: Live Line Tool Care, Cleaning, and Inspection Procedure

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7
Q
  1. Prior to inspecting hot sticks, they should be cleaned. Describe the procedure for the daily cleaning of hot sticks.
A

Cleaning prior to inspection shall include the following:
Fan off excessive dust build-up before wiping to prevent scratching during
cleaning
Wipe with clean absorbent cloth
Clean with spiral motion from top to bottom of pole (i.e. rotate pole while
cleaning to avoid longitudinal scratches). IF dry wiping does not remove
contaminated, use wet cleaning method (see pg. 2).
Coat with silicone using clean silicone cloth or wipe. Wipe in a circular motion
(not up and down).
Reference: Live Line Tool Care, Cleaning, and Inspection Procedure

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8
Q
  1. What are the approved methods for storing hot sticks on a pole?
A

Live line tools shall not be hung on a conductor. An approved tool hanger or bag shall be used.
Reference: APM Rule 222.f

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9
Q
  1. What is the minimum conductor size that mid-span taps can be installed?
A

Minimum line conductor size 1/0 ACSR or 2 Strand copper.
Reference: DOH, Figure DC 590-1

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10
Q
  1. What is the maximum load that may be dropped using the standard Loadbuster®?
A

600 A non-capacitive current
Reference: DOM, TE-1 4.1.1

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11
Q
  1. What is the largest capacitor bank that may be de-energized with the standard Loadbuster®?
A

This tool can be used to de-energize overhead capacitor banks up to a maximum size of 1800 kVAR in the 4 kV, 12 kV, and 16 kV systems
Reference: DOM, TE-1 4.1.1

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12
Q
  1. After how many operations must a Loadbuster® be replaced?
A

New and modified loadbuster tools are equipped with operation counters, Figure 1–10, and shall not remain in service for more than thirty-six (36) consecutive months, or used for more than 1,500 operations (whichever occurs first) between service intervals.or 3 years
Reference: DOM, TE-1 2.3

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13
Q
  1. How many different sizes of Loadbusters® are used by Edison, and what are their applications?
A

There are two sizes of Loadbuster®tools:
The standard Loadbuster® tool is used on open-style overhead fuses, cutouts and disconnects with load-break hooks up to 16 kV.
The 33 kV Loadbuster® tool is only approved for use on S&C 33 kV fuse holders and shall not be used on capacitor banks.
Reference: DOM TE-1 4.1.1 and 2

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14
Q
  1. Describe what a tap line clearance is, when it would be required, and how it is taken.
A

On distribution tap lines with a single source of supply, the person in charge of the distribution crew or Troubleman must issue a formal clearance to himself or another qualified person of the crew prior to working on an electric line or some piece of operating equipment which is inherently too hazardous to work on while in service. The following must be provided to the Switching Center and Distribution Operations Center prior to de-energizing any distribution tap line:
1. Name, radio call number or cell telephone number
2. Circuit name and voltage
3. Identify work to be performed and location
4. Identify method to de-energize tap line
5. Estimated timeframe if de-energizing tap line
Reference: APM Rule 105.c

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15
Q
  1. How much load, if any, may be dropped using a KPF switch?
A

Non load-break type pole-top switches shall not be used for interrupting load.

100- no whiskers
150- 12’ arm no overbuild
350- whiskers
Reference: DOM, SW-2 2.0

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16
Q
  1. What are the application ratings for overhead load-break switches and load-break switches automated?
A
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17
Q
  1. Use APM Rule 109 to answer the following:
    A. When is approved head protection required?
    B. When are garments with full-length sleeves required?
A

A
1. Where there is a risk of receiving head injuries from hazards such as flying or falling
objects, electric shock and burns, or other overhead hazards.
2. On poles, structures, or when in an aerial device (for example, Bucket truck, pin on
platform, or crane basket).
3. In switch yards.
4. High voltage rubber gloving or hot sticking work, listed in the Arc Flash Manual, can be
done with an approved arc rated balaclava and goggle kit.
NOTE: Head protection must not have unapproved accessories, flamable or conductive materials attached
B
1. Wood poles or crossarms.
2. Hot or injurious liquids or materials.
3. Open flames or sparks, additionally the garment must be flame resistant.
4. Within the arc flash boundary or exposed energized lines or equipment arc resistant (AR) shirts tucked in, with full length sleeves rolled down and buttoned, and AR pants must be worn.
Reference: APM Rule 109.b and .c

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18
Q
  1. What is the correct order to install and remove protective cover?
A

D. In applying protective equipment, an employee must always protect the nearest and lowest wires first, insuring personal protection at all times. In removing protective equipment, the reverse order must be maintained. Protective equipment must be applied from a position underneath the conductor when possible.
Reference: APM Rule 207.d

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19
Q
  1. Describe the rubber covering inspections required by the APM.
A

E. Rubber blankets and sleeves must be given a visual roll test to inspect for defects at least once each day while in use, preferably at the beginning of the work period and at any other time when their condition is in doubt.
Reference: APM Rule 131.e

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20
Q
  1. Describe the storage requirements for rubber protective equipment, per the APM.
A

D. When not in use, rubber protective equipment must be protected from mechanical and chemical damage, and must always be stored in the containers provided and nothing else placed therein.
Reference: APM Rule 131.d

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21
Q
  1. At a minimum, what information should be provided to the 911 operator?
A
  1. Name, nature of emergency.
  2. Address, nearest cross street, city.
  3. Phone number you are calling from.
  4. Stay on the line until information is confirmed.
    Reference: APM Policy P-14-A-2
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22
Q
  1. What voltages may be worked on while wearing rubber gloves?
A

A. Approved rubber gloves must be worn at all times when working on exposed energized conductors rated from 120 Volts to 17 kV (a/c nominal) unless performing work with live line or other approved insulated tools
2. When working with rubber gloves on overhead primary conductors or equipment energized in excess of 7,500 Volts, insulate/isolate practices must be used in accordance with approved Organizational Unit or OU procedures.
Reference: APM Rule 108

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23
Q
  1. What is the proof test AC voltage for class 2 rubber gloves?
A

20,000 volts
Reference: (2nd step book reference, annual compliance, rubber glove refresher

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24
Q
  1. What are the voltage ratings for each class of rubber gloves used by SCE?
A

Class 0: 0-1000 V
Class 1: 10.000 V
Class 2: 20,000 V
Reference: Rubber Glove Manual, General Information 2.0 Rubber Glove Classes

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25
Q
  1. What is the maximum voltage that can be worked upon, with rubber gloves, from the pole?
A

7,500 V
Reference: Rubber Glove Manual, 3.3.1

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26
Q
  1. Calculate the full load amps for an 1800 kVAR capacitor
A

multiply KVAR by 1000 the divide VAR by voltage by 1.73
Reference: 4’” Step Capacitor Banks and PF Training Manual

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27
Q
  1. Explain basic operation of a load buster.
A

4.3 Operation of Loadbuster Tool
STEP 1. Prior to using the loadbuster tool, fully depress the load-break tube, then pull back lightly. An increasing spring tension should be felt. The tool is now “fully cocked” and ready for operation.
STEP 2. The loadbuster tool and open-style fuseholder and disconnects are designed to be operated (by pulling in a downward attitude) from the pole position and well below the fuseholder level. When working from a lineman’s platform ladder, or aerial bucket, the operator should be positioned approximately in the same position as if on the pole. This positioning will allow the fuseholder to unlatch and open while providing for a smooth, steady extension of the tool until the load is dropped.
STEP 3. Reach across in front of the fuse or disconnect with the loadbuster, hooking the anchor (located at top of tool) over the attachment hook (top of fuseholder or disconnect) on the far side of the fuse or disconnect (see Figure 1–6).
STEP 4. Swing the loadbuster toward the fuse or disconnect, passing the pull-ring latch (located on tool frame), through the pull-ring on the fuse or disconnect blade. The pull-ring latch will deflect, and upon complete entry of the pull-ring, will spring back and lock in place. The loadbuster is now connected across the upper contact of the fuseholder or disconnect and the upper part of the fuse or disconnect blade (see Figure 1–6).
STEP 5. To open the circuit, operate the loadbuster with a firm, steady pull until it is extended to its maximum length. AVOID JERKING OR HESITATION. The circuit is now interrupted (see Figure 1–7).
STEP 6. With the loadbuster fully extended, and the fuse or blade open, the loadbuster can be removed by simply rolling the loadbuster away from (on 4 kV disconnects, toward) the operator allowing the latch to disengage from the pull-ring and the fuse or blade to fall fully open (see Figure 1–8).
STEP 7. The loadbuster anchor-ring can now be lifted from the fuse or disconnect attachment hook without danger of a restrike (see Figure 1–9
STEP 8. Before closing in overhead SMU-20 fuses following a Loadbuster operation, test the latch function of the SMU-20 fuse holder with a hotstick. With the fuses in the down position, use a hotstick to first push the top latch of the fuse holder to the fully-up position, then release pressure on the top latch. The top latch should freely and immediately drop to the down position. If the top latch of the fuse holder is found to move up and down freely, then the fuse may be closed in (see Figure 1–3). Replace any fuse holder found with a top latch that does not move up and down freely, with a new SMD-20 fuse holder
Reference: DOM, TE-1 4.3

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28
Q
  1. Can load-pickup and load-break operations using Break-Safe Tool be done with rubber gloves? Explain?
A

No, load-pickup and load-break operations are to be accomplished using hot sticks only.
Break safe 300 A load pick up, break, and continuous.
Reference: DOM, TE-10 2.0

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29
Q
  1. Can there be too many capacitor banks on a circuit?
A

Yes, the desired VAR-Watt ratio is 0.5 to 0.65. Too many capacitors could move a circuit from this ratio.
Reference: 4’” Step Capacitor Banks and PF Training Manual

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30
Q
  1. What is the hazard when a capacitor bank has one or two blown fuses?
A

Higher rack-to-ground potential would develop when only one or two phases are energized due to fuse operation or switch failure. With only one phase energized, the capacitor neutral-to-ground voltage can approach full phase-to-ground potential (9.5 kV in a 16 kV system). With two phases energized, the capacitor neutral-to-ground voltage can approach approximately half of phase-to-ground potential (4.75 kV in a 16 kV
system.
Reference: 4’ Step Capacitor Banks and PF Training Manual

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31
Q
  1. Explain the use of an insulated link stick with hot hoists.
A

When using hot hoist, an approved insulted link stick shall be installed between the hoists and any other surface with a different potential. Fiber strap hoists must be kept clean, dry, and in good repair.
Use appropriate insulating hot sticks in series with the web strap hoist and when necessary in series with the body to achieve proper working distance per OSHA Regulation Subpart V, 1926.950 or company work practices.
Reference: GM, pg. 19 Rigging manual 2.5

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32
Q
  1. What is the approach distance for the following? May approach distances be reduced? Explain.

a) 4 kV
b) 12 kV
c) 16 kV
d) 33 kV

A

a) 2 feet 1 inch
b) 2 feet 2 inch
c) 2 feet 7 inches
d) 2 feet 7 inches
Yes, Approach distances may be reduced provided adequate approved protective devices are used. Such protection shall be applied and removed with approved insulating devices.
Reference: APM Rule 147.a, b

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33
Q
  1. Which live line tool is used to control:
    a) Stranded conductor?
    b) Solid conductors?
A

a) Stranded conductor?
b) Solid conductors?
a) Chance clamp / stranded wire holder
b) Duck bill / flat jaw on clamp
5th step hotsticking

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33
Q
  1. What must be done prior to opening a primary neutral on four-wire high voltage circuits?
A

The neutral conductor in the overhead or underground shall not be opened except on authority from the Grid Ops Manager or equivalent authority.
Reference: APM Rule 208.b

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34
Q
  1. Do GADs have to be in the same structure where the work is being performed? Explain.
A

NO, if its is in a closed or locked structure (Vault, manhole, PME) then it is ok to not be in the structure being worked in
Grounds shall be installed so that at least one set is visible to one member of the crew, unless one of the grounding devices is accessible only to authorized persons.
Reference: APM Rule 141.e

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35
Q
  1. If a cable is isolated from all sources, must grounds still be applied? Explain.
A

Cable isolation method
This method is applicable when all sources (breakers, fuse, switch or taps) are isolated and the cables/potheads are floated or underground components are installed on insulated standoffs.
All primary pre-molded, rubber-separable dead-break connectors shall be operated with live-line tools until proven de-energized.
Exception: The 600 A T-Bodies shall not be landed or removed with live line tools.
The approved safe work method requires the switch position (or apparatus) to be grounded prior
to installing/removing of 600 A basic elbow components (T-Bodies).
This method also applies for changing cables as a result of a dig-in.
This method will not require any working grounds or EPZ. However, the cable or equipment to
be worked on shall be proven de-energized at the work location
Reference: UGGM, 3.6.D.3

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36
Q
  1. Is a conductor de-energized if it is not grounded? Explain.
A

b. Cable and equipment must be considered energized and worked with adequate protective devices until it has been tested de-energized with an approved device for indication of voltage and grounded with approved ground devices.
Reference: APM Rule 306.b

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37
Q
  1. Are ratchet hot cutters an approved device for spiking (proving) cable de-energized?
A

No, they are no longer approved
Reference: UGGM, 5.1

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38
Q
  1. What must be done before remote cutting de-energized cable?
A

Before spiking any cable, verify that the concentrics are grounded, or shunt or ground the cable concentric/ sheath of that cable on both sides at the work location.
Reference: UGGM, 3.5.2

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39
Q
  1. When should protective covering be used when working hot sticks?
A

D. Employees working with live line tools must use adequate protective equipment on primary conductors, low-voltage conductors, telephone circuits, and other wires which are within reaching distance..
Reference: APM Rule 222.d

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40
Q
  1. While hot sticking on a 12 kV circuit, how far below the metal of the hot stick must the worker keep their hands?
A

A. When using live line tools, employees must not place their hands closer than is absolutely necessary to the energized line or the energized metal parts of the tool being used and in no case closer than specified in Rule 147.
12kV MAD 2’-2”
Reference: APM Rule 222.a and Rule 147.a

41
Q
  1. How many qualified electrical workers are required to hot stick on energized conductors or equipment?
A

Except as outlined in General Rule 155, when work is to be performed on energized lines by means of live line tools, two qualified electrical workers shall be assigned to do the work.
Reference: APM Rule 221.c

42
Q
  1. When work is to be done on the bond or metal fixture of either a Dryfuss or squirrel cage fixture supporting energized conductors, how is the work accomplished?
A
  1. When work is to be done or contact made on the bond or metal fixture of either a Dreyfuss or squirrel cage fixture supporting energized conductors, it must be done with live line tools or the fixture must be grounded.
    Reference: APM Rule 141.k
43
Q
  1. When two qualified lineman are performing rubber glove work on lines energized above 7,500 V, what is the role of each lineman?
A

During the time an employee is working on high-voltage lines another employee in close proximity shall act primarily as an observer to prevent accidents.
Reference: RGM, pg. 16

44
Q
  1. What are the three undesirable effects of Low Lagging Power Factor?
A

A. It cuts down system load ability
-It reduces the capacity of the system to carry kilowatts. The capacity of all apparatus is determined by the KVA it can carry; hence when power factor is low, larger generators, lines, transformers, feeders, and switches must be provided for each kilowatt of load.
B. Low power factor means more current per kilowatt
-It mean each kilowatt of power carries a higher burden of lines losses - Makes it cost more to transport each kilowatt of power.
C. Low power factor may depress the voltage
Reference: 4*” Step Capacitor Banks and PF Training Manual

45
Q
  1. If a span guy, in a Grade “A” crossing, is installed level between two poles, what is the rated pull for each of the following guy wire sizes?
    A. 7/32
    B.9/32
    C. 3/8
    D.7/16
A

A. 7/32
B.9/32
C. 3/8
D.7/16
A. 7/32 = 2,400 Ibs
B. 9/32 = 4,475 Ibs
C. 3/8 = 7,700 Ibs
D.7/16= 10,000 lbs
Reference: DOH, Table PO 320-6

46
Q
  1. Compare and contrast PME and PMH.
A

The PMH is a 2- or 4-compartment cabinet containing 3-pole, 600 A, gang-operated load-break switches, 3 single-pole 200 A air load-break fused disconnect switches, direct bus terminations, or a combination of these devices. The switches and fused disconnect switches are each in separate compartments. Underground cable is used to connect the switches and disconnects.
PME switchgear is similar except that it is completely dead-front construction and utilizes load-break elbows instead of single-pole disconnect switches.
Reference: , SW-6 1.0

47
Q
  1. Describe the conditions of corrosion for priorities 1 &2.
A

A. Corrosion
See CP–1 for details.
1. Severe Corrosion (Priority 1)
* Severe corrosion or pitting has eroded 100 percent of the wall thickness.
* Equipment cable terminations hold down bolts have corroded and can no longer support the cable.
* Corrosion-caused equipment oil leak in a wet structure.
2. Very Heavy Corrosion (Priority 2)
* There is very heavy corrosion over most of the equipment’s surface, or pitting exceeds 50 percent of the wall thickness.
* Equipment cable termination hold down bolts have corroded to a point where the threads have been obliterated.
* Corrosion-caused equipment oil leak in a dry structure
Reference: DOM, IM-5 5.1.A

48
Q
  1. What is the minimum class for a new wood pole that will hold a 100 kVA transformer bank?
A

H4
Reference: DAP, Table AP 106-3

49
Q
  1. You respond to a no-lights call and find an un-banked CP Transformer has tripped on overload. Explain the policy regarding this scenario.
A

2.2 CP-Type Transformers
CP-type transformers with tripped overload breakers are normally to be replaced without field testing or resetting of the breaker. If a safe stand-off distance can be achieved by means of an aerial lift or other approved work method, one attempt to reset the breaker is permitted following visual inspection. A Material Performance/Failure Report (MPFR) shall be written for each rejected transformer. Rejected transformers shall be processed in accordance with Reference 3.8 and Reference 3.9.

If a safe stand-off distance can be achieved by means of an aerial lift or other approved work method, one attempt to reset the breaker is permitted. If the breaker trips when reset, and there is evidence of an external secondary problem, such as arcing in secondary lines, fix the problem and either repeat this section or replace the transformer. If this safe stand-off distance cannot be achieved, replace the transformer.

Reference: DOM, TS-5 Section 2.2

50
Q
  1. How is applying cover from a pole different than applying cover from a bucket?
A

From a pole the nearest conductor is usually the pole position. From a bucket the nearest maybe the outside conductor. In applying rubber protective equipment, an employee shall always cover the nearest and lowest conductors first. In removing rubber protective equipment, the reverse order shall be followed. Protective equipment should
be applied from a position below the conductor when possible.

Reference: RGM, pg. 22

51
Q
  1. What information shall be provided to the switching center and GMC (DOC) prior to de energizing any distribution tap line?
A

The following shall be provided to the Switching Center and Distribution Operations
Center prior to de-energizing any distribution tap line:
1. Name, radio call number or cell telephone number
2. Circuit name and voltage
3. Identify work to be performed and location
4. Identify method to de-energize tap line
5. Estimated timeframe if de-energizing tap line
Distribution tap lines are taken out and placed in service at the discretion of field personnel. The contractor or distribution field personnel shall notify the Switching Center and the Distribution Operations Center (DOC) of their work location, including switching as it helps in locating service complaints or trouble calls which are received and allows for the updating of Outage Management System (OMS) graphic displays.
Reference: APM Rule 105 and DOM, CO-1 Attachment 1

52
Q
  1. What work is permissible inside the high voltage compartment of live-front Padmounted transformers, with both lines energized?
A
  1. Any time an employee needs to open the primary side of an energized underground live front- transformer, PMH, fuse cabinet or any other type of live front equipment task will require at a minimum of one Journeyman and a 2nd QEW .
    b. High-Voltage Compartment — Both Lines Energized
  2. Operation of switch handles with live line tools.
  3. Phasing between lines. Probes of phasing set to be insulated to within three inches radially of probe end.
  4. Removal of protective barriers. The use of approved live line tools is the primary and preferred method to perform the task. If the barrier does not have the capability (i.e., no loop or hole), high-voltage rubber gloves may be used only after lines/equipment have been de-energized but not necessarily grounded.
  5. All primary testing and grounding (e.g., phasing, amp check, voltage indicator, etc.) must be accomplished through the use of an approved live line tool.
    NOTE: At no time shall a Qualified Worker (QW) open the primary or secondary side of a live front transformer/equipment
    Reference: APM Rule 311.a
53
Q
  1. What is the ampacity for the following conductors?
    A. #4 ACSR
    B. #2 ACSR
    C. 1/0 ACSR
    D. 4/0 ACSR
    E. 336 ACSR
    F. 653 ACSR
A

A. #4 ACSR
B. #2 ACSR
C. 1/0 ACSR
D. 4/0 ACSR
E. 336 ACSR
F. 653 ACSR
A.160 amps
B. 210 amps
C. 280 amps
D. 415 amps
E. 605 amps
F. 920 amps
Reference: DOH, Table CO 106-1

54
Q
  1. Given a 25 KVA 12KV/120-240 transformer with an impedance of 2%, what is the fault duty on 240 volts?
A

Reference: 4’ Step Fuses Training Manual

55
Q
  1. What are the four essential steps involved in the procedure of TS-5 for a new or relocated/reused transformer? Explain.
A

1.Conduct a visual inspection.
2. Conduct in-place TR and Megger electrical tests of individual transformer(s).
3.Conduct an unload full-voltage test with test fuses.
4. Load test the transformer with normal fusing.
Reference: DOM, TS-5 4.1

56
Q
  1. If two 25 kVA transformers are installed in an open delta bank, what is the available
    kVA?
A

(25 kVA + 25 kVA) 0.86 = (50 kVA)(0.86) = 43 kVA
Reference: 4’ Step V, I, and P Relationships Training Manual

57
Q
  1. How would you cut over the following bank? The name plate reads: 12-kV/120-240V. The circuit is a 12 kV 3-wire circuit. The customer desires 120/208 V, 4-wire, 3-phase service. Fully explain any modifications that should be made.
A

DOM
D. 120 V Cutovers
To cutover a transformer, follow the steps below:
STEP 1. Set the transformer down on sturdy level ground; DO NOT cut the transformer over while it is hanging (this can cause permanent damage to the tank).
STEP 2. Equalize the transformer tank pressure by pulling the ring on the PRV.
STEP 3. Remove the transformer lid.
STEP 4. Follow wiring instructions detailed in DAP AP 116.
STEP 5. Tape up X3 bushing.
STEP 6. Replace lid.
STEP 7. Mark each transformer with “120 V” using Scotchlite™ stickers above the manufactured installed kVA sticker. This will make them easily distinguishable from their 120 V/240 V counterparts.

*TTR and Megger before and after cutting over

Reference: 4th Step 3-wire Banks Training Manual, DOM TR-1 5.3-D, DAP 116, and DOH, Figure GR 120-8

58
Q
  1. What is impedance in an AC circuit?
A

the total opposition to current flow in an ac circuit. it is made up of resistance and reactance
Reference: 2nd Step Basic AC/DC Electrical Theory Training Manual
5’ Step Self-Study Questions

59
Q
  1. What are the two components of impedance? What term and units are used to express impedance?
A

Resistance and reactance. Expressed as Z, with ohms as the unit.
Reference: 2nd Step Basic AC/DC Electrical Theory Training Manual

60
Q
  1. When determining the size of an anchor and guy wire to be used, what tension is assigned to the following conductors?
    A. #4 ACSR
    B. #2 ACSR
    C. 1/0 ACSR
    D. 336ACSR
    E. 653 ACSR
A

A. #4 ACSR
B. #2 ACSR
C. 1/0 ACSR
D. 336ACSR
E. 653 ACSR
e) #4 Bare CU
f) #2 Bare CU
A. 604 lbs.
B. 761 lbs
C. 1,415 Ibs
D. 2768 lbs
E. 3200 lbs
F. 484 Ibs
G. 761 Ibs
Reference: DOH, Table PO 320-1

61
Q
  1. What are the crossarm requirements for dead-ending the following:
    a) 336 ACSR 4-wire
    b) 1/0 ACSR 3-wire
    c) #4 ACSR 2-wire
    d) 2/0 CU 4-wire
A

a) 336 ACSR 4-wire
b) 1/0 ACSR 3-wire
c) #4 ACSR 2-wire
d) 2/0 CU 4-wire
Wood arms
a) Triple arm with stiffeners
b) Double arm
c) Single arm
d) Double arm with stiffeners
composite arms
A. Doubles
B. Doubles
C. Single arm
D. Doubles
Reference: DOH, Table CO 200-1 and Table CO 211-1

62
Q
  1. Where would you find the methods and materials used for preventing radio interference when dead-ending ACSR and Copper conductors?
A

DOH. CO 209.
Reference: DOH, CO 209

63
Q
  1. Given a 4-wire, 1/0 ACSR circuit, what is the total dead-end tension? What is required when dead-ending 4-wire, 1/0 ASR conductors on a 10-foot crossarm?
A

1/0 ACSR tension is 1415 Ibs; therefore,
4 wires at 1415 Ibs each = 4660 Ibs
Double arm construction would be required.
Reference: DOH CO 200 Table CO 200.1

64
Q
  1. According to the APM, when would the automatic circuit recloser - on an underground circuit being worked - be made non-automatic?
A

a. No test orders will be taken on all circuits in an underground structure whenever the following work activities will be performed:
1. Testing, grounding, cutting, spiking, repairing cable or components normally energized above 600 V.
2. Disassembling cable components normally energized above 600 V.
3. Installing or removing electrical or communication cable.
4. Relocating energized high-voltage underground cable or equipment.
5. Filtering or replacing oil on energized high voltage underground equipment.
6. Operating energized loadbreak components.
7. Immediately following a high-voltage failure.
NOTE: In addition to the above requirements supervisors in charge may make automatic circuit reclosers non-automatic whenever they deem it necessary for the safety of the employees performing the work or may consult with their manager to determine if a line section or piece of equipment should be de-energized.
Reference: APM Rule 316

65
Q
  1. May high-voltage rubber gloves be used to remove a Basic Insulating Plug (BIP) on a de-energized, underground 600 A component? Explain.
A

No. Only torque can be broken on a BIP with high voltage rubber gloves. A BIP can only be removed using hot sticks. Underground components are to be operated with live line tools until proven de-energized (grounded).
Reference: APM Rule 306

66
Q
  1. May grounds be installed using rubber gloves?
A

No employee must handle any conductive portion of the grounding device while it is being installed or removed from the conductors, except when using live line tools
Reference: APM Rule 141.5

67
Q
  1. May rubber gloves be used to operate a hot hoist, from a pole and on an energized line, in the following cases
    a) 4 kV
    b) 12/16 kV
A

a) 4 kV
b) 12/16 kV
a) Yes
b) No
Reference: RGM, pg. 17.

68
Q
  1. Is it permissible to use rubber gloves when working on the bond of energized circuits?
A

Yes, given the following:
a. Prior to contacting the bonds of energized circuits, the bond must be grounded or worked with live line tools. Only live line tools must be used on the bonds of circuits above 20 kV where the conductors are supported on pin or post type insulators.
EXCEPTIONS:
* Rubber gloves may be used on the bonds of circuits 20 kV or less, only when the integrity of the insulators have been inspected and found to be in good condition.
* Circuits above 20 kV, where the circuit consists of all suspension type insulators, rubber gloves may be used on the bonds, only when the integrity of the insulators have been inspected and found to be in good condition
b. Every insulator on the circuit must be checked visually for breaks and cracks on the pole being worked on before contact is made with, or work is done on, the bonds of energized circuits.
1. If a pin or post type insulator is faulty or more than 30 percent of the insulators in a string of suspension insulators are faulty, the conductor must be cleared, or de-energized before any work is done on the bond.
2. If conditions are such that it is impracticable to clear or de-energize the conductors, the bond must be worked with live line tools.
c. The following procedures must be followed if the visual inspection indicates faulty insulators:
1. If any insulator is suspected to be faulty on circuits supported on single unit insulators, the conductor must be cleared before any work is done on the bond.
2. When circuits are supported on multiple unit insulators, at least 70 percent of the insulators in each string must be in good condition or the conductor must be cleared before any work is done on the bond.
d. Prior to installing or removing a bonded crossarm within Minimum Approach Distance (MAD) of an energized line the bond must be removed from insulator pins and/or bolts.
Reference: APM Rule 203.a

69
Q
  1. When a line has faulted, can it be re-energized with rubber gloves following repairs?
A

No, only approved devices shall be used to re-energize the line.
Reference: RGM, pg. 24

70
Q
  1. Explain the APM guidance on fused underground equipment.
A

The fuses in underground equipment must not be installed or removed until de-energized (this does not apply to fuses designed to interrupt load) and then only with live line tools or after grounding by approved methods.
Reference: APM Rule 304

71
Q
  1. When utilizing the HVRG work method, do the rubber gloves insulate the employee from the line or isolate the employee from line?
A

3.1 insulate isolate priciples
rubber glove work on overhead distribution voltages 7.5 through 17KV nominal phase to phase voltage shall be done by utilizing the principles of insulate and isolate. An insulated aerial device or pole mounted platform isolates the worker from completing a path to ground. The employee will be insulated by their rubber gloves, and by rubber line hose, rubber blankets, and so forth, on the energized lines they work on
reference RGM section 3.1

72
Q
  1. Describe the procedure for sending any item up a pole that has a direct path to ground, such as extension cords, ground and ground wires.
A

i. When using power tools, grounded material or equipment such as wire, cable, personal grounds, electric cords, and so forth, approved for use on erected poles, towers, or structures, the tools and all electric supply lines connected thereto must be kept a safe distance under the level of circuit or apparatus energized in excess of 600 Volts or must be adequately guarded or secured in such a way as to prevent their contacting energized conductors.
Reference: APM Rule 209.I

73
Q
  1. Describe the testing and inspection procedure for primary rubber gloves, and the defects that should be looked for.
A

c. High voltage rubber gloves must be air and water tested at the beginning of each work period and at any time when the glove’s condition is in doubt. The gloves must be visually examined over their entire inner and outer surface for any defects, that is, burns, cuts, cracks, or punctures. In addition, the cuffs must be stretched to detect abrasions or weak spots
Reference: APM Rule 131.c

74
Q
  1. How often should bucket liners be dielectrically tested? How is it documented on the
    bucket?
A

Insulating Aerial Devices and insulating bucket liners) used for Insulate/Isolate Work
Methods (7.5 kV through 17 kV nominal phase-to-phase voltages) shall be dielectric tested at least every 12 months and comply with the latest ANSI A92.2 standard for aerials designed for gloving work. In addition they will have insulating bucket liners) and liner protectors) installed. For aerials manufactured after June 26, 2016, the aerial manufacture identification plate must also indicate “Configured for Electrical Work Rubber Gloving.” Aerials manufactured prior to June 26, 2016 are not required to have this indication.

The placard indicating proof of test can be placed inside the cab.
Only one placard for the vehicle is required. Individual stickers for the aerial and liner(s) are not required.

Reference RGM 27 and 4.3

75
Q
  1. Prior to rubber gloving from a bucket truck, what must be done to the bucket first?
A

Immediately prior to using Aerial devices for HVRG work, all insulated portions shall be visually inspected and wiped clean, if necessary. Anything that will adversely affect the insulation of the device shall be removed, including insulator washing hoses, ropes or
cables.
Reference: RGM, pg 24

76
Q
  1. How much of the boom on a bucket truck must be extended for rubber glove work?
    How is this achieved?
A

If a minimum distance of the insulated boom must be extended to meet dielectric capabilities, the insulated portion of the boom shall not be retracted to a position that removes the dielectric rating while working on energized lines

77
Q
  1. When shall the following rubber protective devices be submitted for testing?
    A. Gloves
    B.Blankets
    C. Sleeves
    D.Aerial devices
    E. Digger derrick and hi-liner booms
A

A. Gloves
B.Blankets
C. Sleeves
D.Aerial devices
E. Digger derrick and hi-liner booms
A. 6 months
B. 6 months
C. 6 months
D. 12 months
E. 12 months
Reference: RGM, pg 22

78
Q
  1. Define the terms insulate and isolate as they pertain to rubber glove work.
A

3.1 insulate isolate principles
An insulated aerial device or pole mounted platform isolates the worker from completing a path to ground. The employee will be insulated by their rubber gloves, and by rubber line hose, rubber blankets, and so forth, on the energized lines they work on
reference RGM section 3.1

79
Q
  1. How is the neutral conductor of a four-wire high-voltage overhead treated?
A

The overhead neutral conductor must be considered the same as a phase conductor.
Reference: APM Rule 208.a

80
Q
  1. Are electric tools permitted to be used from a bucket truck? Explain.
A
  1. corded electric tools and their power cords shall be removed from the bucket when working on energized lines
81
Q
  1. For how long may rubber protective equipment be left on energized lines or apparatus?
A

g. Extreme care must be exercised to avoid puncturing all protective equipment. To avoid corona and ozone damage, rubber protective equipment must not be allowed to remain in place on energized lines or apparatus overnight or for more than one eight hour period unless approved by the supervisor in charge.
Reference: APM Rule 131.g

82
Q
  1. Is it necessary to test new rubber gloves and blankets dielectrically before they are put in service?
A

h. Rubber gloves, sleeves, blankets, used on high voltage (above 600 Volts) conductors and equipment must be dielectrically tested at least once every six months and before being placed into service when received from the manufacturer. This equipment must be marked with the date the dielectric test was conducted.
i. Rubber gloves used on low voltage (below 600 Volts) conductors and equipment must be dielectrically tested at least once every six months following placement into service when the rubber glove is received from the manufacturer. Rubber gloves must be marked with the date the dielectric test was conducted.
Reference: APM Rule 131.H and I

83
Q
  1. What must be done before you can climb above automatically switched capacitors?
A

b. Before climbing into or through the area of a capacitor installation, automatically switched capacitors must be de-energized and the controls made inoperative.
c. Contact must not be made with pole top apparatus as specified in Rule 205 or other metal hardware in the area of an energized capacitor installation.
Reference: APM Rule 215.B and C

84
Q
  1. Is it permissible to bank an additive transformer with a subtractive transformer?
    Explain.
A

With transformers of different polarity, they can be paralleled providing the polarity markings are followed and the proper connections are made. If the H1 bushing of each is connected to a common line, and H2 of each to a common line, then the X1 terminal of
each the X4 of each are connected together.
Reference: 4’ Step Wiring Three-Phase Banks Training Manual

85
Q
  1. When required to install pole steps, what is the maximum distance between steps on the same side of the pole? opposites?
A

36 inches same side
18 inches opposite side
9 feet high to first step
Reference: DOH, PO 100.4 2.0

86
Q
  1. With what type of conductor shall clamp top polymer insulators with nylon inserts only be used?
A

Insulated (covered conductor ONLY)
Reference: DOH, figure GR 200-7

87
Q
  1. List the four conditions required to create ferroresonance.
A

Four conditions are required to create a situation where ferroresonance might occur.Unless all four are present, ferroresonance will not occur. The four conditions are as follows:
1. The transformer or bank has phase-to-phase primary connections, or a wye primary with an ungrounded neutral (floating wye).
2. Phases are energized or de-energized one phase at a time.
3. Combined secondary load on the radial is insignificant compared to the primary cable lengths being switched (see )Attachment 8–1, Paragraph 9.
4. If the primary cable will be energized or de-energized one phase at a time and the length of the cable is greater than or equal to the critical length as shown in Table 8–1, a ferroresonant condition may exist. Cable length is the total length (of the run, not the sum of all phases) of all cable in the circuit being energized/de-energized and is measured from the connection point to the end of the radial.
Reference: DOM, TR-8 Attachment-5

88
Q
  1. On what circuits is ferroresonance not a consideration?
A

Ferroresonance is not a consideration on:
* 6.9 kV, 9.4 kV, and 14.4 kV single-phase radials.
* Any radial switched with a gang-operated switch.
* 4 kV wye primary systems when switched with the primary neutral grounded
Reference: DOM, TR-8 Attachment 1-7

89
Q
  1. Is rubber gloving permissible for work on the high voltage side of a de-energized
    transformer?
A

Rubber gloves may not be used to work on primary or secondary bushings. Rubber gloves may be used to work the tap if insulate/isolate work methods are used.
rubber gloves may not be used to work on the high voltage side of a de-energized transformer without shunts or grounds
RGM #49

90
Q
  1. When shall overhead switches be equipped with quick-break attachments?
A
  1. Switches shall be equipped with quick break attachments for 33KV applications
  2. For switching unloaded cable sections over 2,000 feet in length (any voltage)
    Reference: DOM SW sw-2 4.1A
91
Q
  1. For what applications is the enclosed cutout fuse holder used? What operating restrictions exist for this fuse holder?
A

It is used in congested pole assemblies with limited vertical clearance.
The enclosed cutout cannot break loads and should only be opened when the circuit is de-energized, or when all secondary load has been disconnected from the transformer.
Reference: DOH, Table PR 107-1 note 6

92
Q
  1. A crew is tasked with installing an overhead three-phase 75 kVA transformer bank on a 12kV circuit. What are the types and classes of allowable fusing options for this installation?
A

Fuse link: 10
Fault tamer: 10
SMU-20: 8K
15 kV ELF: 8
X-limiter: 10
Reference: DOH, Table PR 118-2

93
Q
  1. Following operation of a fault tamer, what specific precaution should be observed regarding the fuse links?
A

When the fault tamer operates, it can become hot enough to cause burns. Allow adequate time to cool down, or wear gloves before attempting to test or replace the fuse link in the fuse tube or the “limiter” fuse.
Reference: DOH, PR 128 3.5

94
Q
  1. What is the purpose/application for overhead insulated wire spacers?
A

The insulated overhead wire spacers shall be used in high-wind areas and where traveling lines exist to avoid adjacent wires from coming in contact with each other.
Reference: DOH, CO 450.1 1.0

95
Q
  1. What are the guidelines for preventing travelling wave problems when installing overhead insulated wire spacers?
A
  1. Maximum distance between spacers must be less than 240 feet.
  2. Maximum distance from the pole to the first spacer must be less than or equal to 100 feet.
  3. Adjacent subspans (for example, distance between adjacent spacers) must differ in length by at least 10 feet.
  4. No more than two subspans in a given span can have the same length.
  5. The required number of spacers - determined by span length - must be installed.
    190’-400’ -2 spacers
    410’-590’ -3 spacers
    Reference: DOH, CO 450.4.1
96
Q
  1. Prior to energizing a new overhead capacitor bank, what test must be performed on each new capacitor? What is the acceptance criteria for this test?
A

4.2 Checking Capacitance Range
Check each new capacitor unit in a capacitor bank with a C-meter prior to energizing. The acceptable capacitance range for each kVAR rating is usually displayed on a decal attached to the back of the C-meter
Reference: DOM, CA-1 4.2

97
Q
  1. What are the available fuse holder (cutout) options for the installation of fixed overhead capacitor banks?
A

Fixed overhead capacitor banks may be installed with SMD-20 fuseholders or open-style fuse cutouts with loadbuster hooks.
Bayonet cutouts (with load-break attachments) may be used if available.
Reference: DOM, CA-1 4.0

98
Q
  1. What are the requirements for routine inspections of overhead capacitor banks?
A

The following routine inspections shall be performed:
- Check for bulging, ruptured, or discolored capacitor units.
- Check for blown fuses.
- Check cable and cable terminations for signs of deterioration or damage.
- Check the cables, terminations, and capacitor equipment for excessive heat using a temperature-measuring instrument as outlined in Reference 3.12 and Reference 3.13.
- Check for excessive corrosion or other damage.
- Check for oil or compound leaks.
- Check for clearances, barriers, and grounding.
- Inspect fuseholders, cutouts, or fused disconnects.
Reference: DOM, CA-1 5.3

99
Q
  1. Provide two examples of when a clearance is required.
A

A. Before any employee starts work on de-energized equipment, apparatus, or lines for which clearances are required, the employee must either obtain a clearance or report to, and work under, a qualified employee who holds a clearance.
B. Clearances are required to work on de-energized generating station or substation apparatus or equipment which is normally energized above 600 Volts.
C. Clearances are required to work on de-energized lines or line sections above 600 Volts. When clearances are required, they must be taken in accordance with Section 700 of the Accident Prevention Manual.
Reference: APM Rule 105 A-C

100
Q
  1. What are the Rules That Will Keep You Alive?
A

1.Must wear required flame-resistant clothing when performing any task that involves
working on or near energized lines and equipment.
2. Use required fall protection while in an aerial lift or climbing a wood pole.
3. When required, use protective cover and high-voltage rubber gloves while working on
or near high-voltage lines and equipment.
4. Lines and equipment, normally energized above 600 volts, must be tested and
grounded when required, utilizing personal grounds between the work location and
every source of supply, prior to contact.
Reference: 1st Step PP and Safety Training Manual

101
Q
  1. List and describe the 6 Safety and Environmental Fundamentals
A
  1. KNOW YOUR JOB. Understand the requirements of your job. Make sure you have the
    specific knowledge and skills to perform the work safely and effectively. If you have any
    doubts, ask questions and, when necessary, get additional training so that you are
    ready to work safely.
  2. IDENTIFY THE HAZARDS AND UNDERSTAND THE RISKS. While preparing for work, assess
    the work environment, and identify any potential environmental or safety hazards.
  3. USE EFFECTIVE PRE-JOB BRIEFINGS AND CONDUCT ACTIVE TAILBOARDS. Conduct a
    thorough tailboard using the Written Tailboard Form. Make sure everyone understands
    the work method as well as their roles and responsibilities. On the Written Tailboard
    Form, list the environmental and safety risks, and clearly discuss how these risks will be
    avoided.
  4. FOLLOW THE RULES AND USE APPROVED PPE. Perform the job in accordance with the
    approved work method. Follow all the rules, especially the Rules That Will Keep You
    Alive. It’s never safe to bend the rules or not follow them. Also, make sure that you are
    wearing the appropriate PPE (one of the Rules That Will Keep You Alive), and that you
    have the proper tools and materials to work with.
  5. USE PEER-CHECK AND SELF-CHECK. Use your peers to check your understanding of the
    task, confirm that your process is sound, and ensure that you are protected against
    errors. When performing field observations, discuss the importance and value of the
    peer-check method along with other error-reduction tools, such as QWV (QualifyValidate-Verify) and STOP (Stop-Think-Observe-Perform). Remember to be aware of
    your situation, watch out for one another, and speak up to protect one another from
    injury.
  6. HAVE EFFECTIVE CREW COMMUNICATION. Use simple language and be clear. Make
    sure you are understood; look and listen for confirmation. Provide concise replies to
    confirm your own understanding. Give positive feedback and helpful suggestions when
    needed. Use the Written Tailboard Form to capture your discussions and to verify that
    everyone understands the task at hand.
    Reference: 1* Step PPE and Safety Training Manual

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