5th step ssq Flashcards
- What are the minimum and maximum lengths for a mid-span tap?
4 feet minimum
7 feet maximum
Reference: DOH, Figure DC 590-1
- Explain APM Rule 147: Working Distance.
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
- 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. 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
- Explain APM Rule 104: Live Line Tools
- 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
- Before using grounds, what does the inspection process entail?
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
- Describe the visual inspection criteria for hot sticks.
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
- Prior to inspecting hot sticks, they should be cleaned. Describe the procedure for the daily cleaning of hot sticks.
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
- What are the approved methods for storing hot sticks on a pole?
Live line tools shall not be hung on a conductor. An approved tool hanger or bag shall be used.
Reference: APM Rule 222.f
- What is the minimum conductor size that mid-span taps can be installed?
Minimum line conductor size 1/0 ACSR or 2 Strand copper.
Reference: DOH, Figure DC 590-1
- What is the maximum load that may be dropped using the standard Loadbuster®?
600 A non-capacitive current
Reference: DOM, TE-1 4.1.1
- What is the largest capacitor bank that may be de-energized with the standard Loadbuster®?
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
- After how many operations must a Loadbuster® be replaced?
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
- How many different sizes of Loadbusters® are used by Edison, and what are their applications?
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
- Describe what a tap line clearance is, when it would be required, and how it is taken.
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
- How much load, if any, may be dropped using a KPF switch?
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
- What are the application ratings for overhead load-break switches and load-break switches automated?
- 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
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
- What is the correct order to install and remove protective cover?
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
- Describe the rubber covering inspections required by the APM.
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
- Describe the storage requirements for rubber protective equipment, per the APM.
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
- At a minimum, what information should be provided to the 911 operator?
- Name, nature of emergency.
- Address, nearest cross street, city.
- Phone number you are calling from.
- Stay on the line until information is confirmed.
Reference: APM Policy P-14-A-2
- What voltages may be worked on while wearing rubber gloves?
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
- What is the proof test AC voltage for class 2 rubber gloves?
20,000 volts
Reference: (2nd step book reference, annual compliance, rubber glove refresher
- What are the voltage ratings for each class of rubber gloves used by SCE?
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