8th step written (2016)

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electric
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199559
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8th step written (2016)
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2016-08-17 15:00:37
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8th step written (2016)
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  1. Kh
    • Watt hour constant
    • The value of 1 revolution of the meter disk, Expressed in watt hours.
  2. Rr
    • Register Ratio
    • The number of turns of the 1st gear of the register to cause the 1st (or right hand) dial pointer to complete 1 full revolution which = 10,000 watt hours or 10kwhrs.
  3. Rg
    • Gear Ratio
    • The number of turns of the meter disk to cause the 1st (or right hand) dial pointer to complete 1 full revolution = 10,000 watt hrs or 10kwhrs."
  4. Rs
    • Reduction at Shaft
    • The ratio between the number of teeth on the 1st gear of the register to the number of entries on the disk shaft.
  5. Kr
    • Register Constant or Multiplier
    • Multiplier of the register, due to gearing.
  6. TF
    • Transformer Factor
    • Multiplier of the register, due to CT’s and/or CT X PT ratios.
  7. Form
    Industry standard to describe the meter
  8. Test Amps
    Amperage used with line voltage to set the speed of the disk in 1 hour’s time. (1000Rph 1f) (500Rph Poly f)
  9. PKh
    Watt-hour Constant x Transformer Factor
  10. Demand
    The average rate of consumption over a specific period of time
  11. Calibrating Constant
    • The inverse of the number of current circuits in series under test.
    • (Establishes the Kh of individual elements)
  12. S-Base Meter
    A Socket meter is an electromechanical meter in which the meter is designed to plug into a pre-existing meter socket / housing where all the line and load conductors are wired to the internal socket.
  13. A’ Base Meter
    An A base meter is an electromechanical meter where the line and load side conductors are physically connected to the bottom of the meter.
  14. Power
    • An electrical load expressed in watts or kilowatts without a relationship to time.
    • E x I=Watts
  15. Energy
    An electrical load expressed in watts or kilowatts times the number of hours it’s used.

    E x I x time factor = Kwhr
  16. Stator
    (Meter Element)
    The unit that provides the driving torque in a watt-hour meter. It includes the Potential-Coil, the Current-Coil and the related framework to provide a magnetic flux or path
  17. Blondel's Theorum
    In a system of N-conductors, N-1 metering elements properly connected, will measure power and/or energy consumed, provided that all potential coil(s) have a common connection in which no current circuit(s) are connected.
  18. Test Amps Formula
    • E x I x CC x TF
    • 1,000 Rph for single phase
    • 500 Rph for Polyphase
  19. Register Ratio Formula
    • 10,000 x Kr
    • TFxKhxRs
  20. Watts Formula
    • Kh x 3600 x revs
    • Time in seconds
  21. Kh Formula
    • 10,000 x Kr
    • TF X Rr x Rs
  22. Rs Formula
    • 10,000 x Kr
    • TF x Kh x Rr
  23. Rg Formula
    Rr x Rs
  24. Kr Formula
    • Kh x Rr x Rs x TF
    • 10,000
  25. Power Formula
    Volts x Amperes (or) E x I
  26. Energy Formula
    Volts x Amperes x Time (or) E x I x Time
  27. Demand Formula
    • E x I x CCx TF 1000
    • where “I” is equal to the amperage
    • on the meter under test
  28. COLD SEQUENCE METERING
    -Cordova's definition
    -BB Definition
    • A 10,000 amp current limiting fuse disconnect ahead of the meter, located on the same wall as the meter within 2 feet of the meter.
    • (Cordova's definition)
    • The utilization of a fault current limiting disconnect device between the electric meter and the supply source.  
  29. HOT SEQUENCE METERING
    The electric meter is connected directly to the service conductors without the use of a fault-current limiting disconnect or meter safety-switch device between the electric meter and the supply source.
  30. HIGH-LEG
    (Wild or Power leg)
    • The phase having the higher phase voltage to ground on a 4-wire delta-connected service, where the midpoint of one phase winding is grounded.
  31. SERVICE MAST
    The service mast is the conduit containing the service-entrance conductors where the point of attachment and the connection between the service drop and the service-entrance conductors is located above the roofline. The conduit extends to a point, and the weather head is located, above the roof eave. The conduit passes through the eave of the building or extends past the roofline without passing through the eave. The means of attachment is attached to the service mast.
  32. DATA PULSES
    Output pulses (KYZ) generated by the electric meter for use by the Customer.
  33. SERVICE RISER
    The service riser is the conduit containing the service-entrance conductors where the point of attachment and the connection between the service drop and the service-entrance conductors is located on a pole or below the roofline of the building being served. The conduit extends to a point, and the weather head is located, below the roof eave. The means of attachment is secured to the pole or building and is not attached to the service riser.
  34. POINT OF ATTACHMENT
    The point at which the service-drop conductors are attached to a building or other structure.
  35. Current Transformer (CT)
    An instrument transformer designed for the measurement or control of current.
  36. VOLTAGE TRANSFORMER
    An instrument transformer intended for use in the measurement or control of a circuit and designed to have its primary winding connected in parallel with the circuit.
  37. AUTHROIZED CLOSED LOOP
    Authorized use of electric service that is temporarily not being metered.
  38. EMT
    Electric Metallic Tubing
  39. GRC
    Galvanized Rigid Conduit
  40. IMC
    Intermediate Metallic Conduit
  41. ISOLATED TRANSFORMER BANK
    A transformer bank which provides electrical service to a single customer.
  42. NEC®
    NATIONAL ELECTRICAL CODE

    A publication of the National Fire Protection Association, Inc.
  43. NESC®
    NATIONAL ELECTRICAL SAFETY CODE

    A publication of the Institute of Electrical and Electronic Engineers, Inc. as adopted by ANSI.
  44. PVC
    Polyvinyl Chloride
  45. RACEWAY (gutter)
    Any channel for holding bus bars, cables, or wires, which is designed for this purpose.
  46. RESIDENTIAL METERING
    Metering of services used for the exclusive use of the individual customer for domestic purposes.
  47. SECONDARY CONDUCTORS
    That part of the Company's distribution system, which connects the secondaries of the Company’s distribution transformers to the service drop or service lateral.
  48. Pythagorean’s Theorem
    (c2 = a2 + b2) or (b2 = c2 - a2)
  49. Pulse Demand Formula
    • Ke x intervals of hour x max pulses
    • 1000

    = KW demand
  50. Register Ratio Formula
    • 10,000 x Kr
    • TFxKhxRs
  51. Watts Formula
    • Kh x 3600 x revs
    • Time in seconds
  52. Demand Formula
    • E x I x CC x TF
    • 1,000

    (I = applied amps)
  53. VOLTAGE UNBALANCE
    Maximum voltage deviation from average voltage.
  54. AMR
    Automated Meter ReadingAn automated method of reading electric registers (indexes)
  55. CLASSIFICATION OF METERING
    Commercial, Industrial and Residential
  56. Closed Loop
    Temporary unmetered electric service.
  57. JUMPERED
    Temporary unmetered electric service
  58. COMPANY
    The operating Companies of Xcel Energy
  59. CONDUIT or DUCT
    Standard tubular material used for mechanical protection of electrical systems which may be exposed, buried beneath the surface of the ground, or encased in a building structure as required.
  60. INSPECTOR
    The electrical inspector of the Public Authority.
  61. METER/METERING EQUIPMENT
    The equipment necessary to measure the customer’s electric energy use and demand including meter socket, instrument transformers, protective device and meter.
  62. MULTIPLE METER CENTER
    A pre-assembled multiple metering unit or fabricated meter center using meter sockets where two or more customers are metered at a common location.
  63. MEANS OF ATTACHMENT
    Fittings used to attach service-drop conductors.(Screw knob, clevice, etc)
  64. Point of Delivery
    Point where the Company’s electric facilities are first connected to the electric facilities of the customer.
  65. Service
    The furnishing of electric energy for the exclusive use of the individual customer.
  66. Service Drop
    The overhead service conductors from the last distribution pole or other aerial distribution support to and including the splices connecting to the service-entrance conductors at the building or other structure.
  67. SERVICE LATERAL
    The underground service conductors between the Company secondary distribution system and/or transformer terminals and the connection to the service-entrance conductors in a terminal box or meter socket located outside the building wall. Where the meter is located in the building and no terminal box exists outside the building, the point of connection shall be considered the point of entrance of the service conductors into the building.
  68. Calculate True Power (watts) and Apparent Power (VA) using given values
    • Watts= VAB * IA * Cos theta
    • VA= VAB * IA
  69. Solve triangular problems using ALL trig functions with given values and prove wild leg and phase to phase voltage on a wye

    Also solve using Pythagorean's Theorem
    Sin, Cos, Tan

    a2 + b2 = c2
  70. Primary Metering
    Metering of service voltages above 480V nominal.
  71. What is an Ohm?
    The practical unit of electric resistance.
  72. What is a demand register?
    A mechanism that indicates maximum demand and also registers energy used
  73. What is a cycle?
    One complete set of positive and negative values of an alternating current or voltage
  74. Define Demand
    The average value of power or related quantity over a specified interval of time.
  75. What is the min/max height for multiple indoor meter installations. (final grade to meter center)
    2' min/6.5' max
  76. Define Volt
    The practical unit of electromotive force or potential difference.
  77. How many services (points or delivery) will be provided to a building or other structure?
    One
  78. Additional services may be provided by the company for what condition
    • -Optional standby systems
    • -Capacity Requirements
    • -Parallel power production systems
    • -Emergency lighting
  79. Is the point of attachment installed and maintained by the customer.
    Yes
  80. Within _____ inches of the weatherhead shall the point of attachment be located?
    24"
  81. What is the minimum length of service entrance conductors on residential services?
    2 feet
  82. What is the minimum length of service entrance conductors on commercial services?
    3 feet
  83. What vertical clearance is required over spaces and ways to subject to pedestrians?
    12 feet
  84. What vertical clearance is required over driveways, parking lots, and alleys?
    16 feet
  85. What vertical clearance is required over other land traversed by vehicles
    16 feet
  86. What is the maximum height the point of attachment shall above final grade?
    24 feet
  87. For existing services, the Company may grant permission to close a loop for up to a maximum of ____ calendar days?
    7
  88. What is the maximum service span for a 4/0 service drop
    70 feet
  89. What is the maximum service span for a 1/0 service drop
    80 feet
  90. What is the maximum overhead service voltage that can be attached directly to a building except where such building is used as a substation or transformer room.
    2400 volts
  91. Service conductor under hardscape shall be in conduit where the conduit extends ______beyond the hardscape edge.
    2 feet
  92. What is the minimum depth of service laterals?
    24 inches
  93. What are the required size and material of Slip Sleeves?
    • 18” length 2 ½” Dia. Schedule 40 PVC
    • or
    • 18” length 3” Dia. Schedule 80 PVC
  94. Can the center knockout in the bottom of the socket be used for line side UG conductors entering socket.
    No
  95. What is the maximum length for an overhead service drop to a temporary service?
    70 feet
  96. What is the maximum number of service entrance risers on a building?
    Six
  97. U-guard risers shall not occupy more than _____% of the pole circumference.
    40%
  98. What is the maximum number of cables in a standard single-phase pedestal, with six-position URD moles?
    15
  99. Should all electrical equipment be considered energized?
    Yes
  100. When electric meter employees are working on company premises other than electric meter shops, they shall ______.
    Conform to the safety rules of other departments
  101. When shall required Lineman’s class “2” higher rubber gloves be worn?
    When cutting service drops at a fire or similar emergency
  102. Is it required to wear a hard hat every time you’re outside your truck.
    No
  103. How many employees may work off of the same ladder?
    Only one
  104. What is the maximum amperage allowed on any metered load?
    4000 amps
  105. Can conduit coupling be installed above the roofline?
    No
  106. Can Phone loops, cable TV conductors, grounding clamps, etc. be attached to the service mast.
    No
  107. What is the maximum height of the point of attachment above the roofline?
    48 inches
  108. Are junction boxes,  LB’s, or other devices allowed with specific written approval from the Company’s local Electric Meter Department.
    Yes
  109. Must all meters shall be installed outdoors unless approved by the meter department for indoor location.
    Yes
  110. What is the minimum size and material a service mast shall be?
    2” GRC
  111. Must underground temporary service ground rod will be installed by customer on temporary panel OUTSIDE all utility easements?
    yes
  112. What is the minimum depth of working space in front of metering equipment?
    • 3 feet,
    • 3 1/2 feet or
    • 4 feet
    • (depending on the fire rating)
  113. What height shall outdoor multiple meter sockets, vertically aligned be mounted at to center of meter?
    3’ min to 6.5’ max
  114. What height shall indoor multiple meter sockets, vertically aligned be mounted at to center of meter?
    2’ min to 6.5’ max
  115. What height must a single meter be mounted?
    (center of glass)
    4' min to 6' max
  116. Is a stamped brass address tag is required on any location of meter socket.
    No. A non-removable portion only.
  117. How and where must unit numbers on apartments must be marked?
    By a permanent durable means at the meter socket and corresponding main service breaker, tenant panel board, doorway or entrance
  118. What is the minimum dimensions on a 200 amp individual meter socket
    19” high by 13” wide
  119. What is the maximum length of #2 triplex service drop conductor to residential or commercial installations?
    90 feet
  120. Is an authorized closed loop allowed on new electrical services.
    No
  121. Are Line and load conductors permitted in the same raceway or conduit.
    No
  122. When shall Service Mast braces or guyes be used?
    When the WEATHERHEAD is more than 48 inches above the roofline.
  123. Determine KW demand on an Itron Sentinal Form 9 meter based on given pulses.
    • Ke x intervals in hour x max pulses
    •                      1000

    =KW Demand

    See Participant guide, Recorders and Relays Pg 11
  124. Determine how many internal pulses are on an Itron Sentinal Form 16 meter with a given KW demand
    • KW Demand x 1000
    •  Ke x interval in hr

    = Max Pulses

    See Participant guide, Recorders and Relays Pg 11
  125. Determine TF based on given values
    CT x PT=TF
  126. Calculate the watts on a meter with given values
    • 3600 x disk rev x PKh  
    •    Time in seconds

    = Watts
  127. Calculate (PKh) primary watt-hour constant on a meter installation with given values
    PKh = TF x Kh
  128. Calculate the value of Kh, Rr and Rg on a meter with given values.
    Practice applicable formulas
  129. Draw and label the following meters Abase and Socket
    FM5, FM6, FM8, FM9
  130. Draw a pictorial and schematic view of the transformers and
    -Connect the conductors from these drawings to the secondary lines
    - Label the voltages from this system at the secondary lines.
    - Draw and connect all electromechanical SC Abase and Socket meters.
    • -Open Delta 3w 3Φ
    • -Wye bank 4w 3 Φ
    • -Three wire single-phase delta
    • -Four wire three-phase closed delta.
  131. List missing figures in the Blue Book diagram SC-40, SC-60, TM-10, TM-20, TM-30, CR-10, CR-70, CR-70A, CR-130
    Refer to blue book

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