C -10 ROUGH WIRING
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Questions and Answers

Direct burial of cable or conductors requires a depth of ____ inches if installed under streets, highways, roads alleys driveways, or parking lots.

  • 12 inches
  • 18 inches
  • 24 inches (correct)
  • 48 inches

    • Which of the following is a thick-walled rigid raceway?

  • EMT
  • RMC (correct)
  • FMC
  • PVC

    • Which of the following is an approved means for disconnecting the grounded conductor from the building's wiring?

  • A terminal with pressure connectors (correct)
  • A set of wire cutters at the entrance of the building
  • A cable bus
  • All of the above

    • What happens to current in a parallel circuit?

    <p>Adds up</p> Signup and view all the answers

    Which of the following does not belong in a residential panel box?

    <p>None of the above</p> Signup and view all the answers

    Lead-in conductors from an antenna to a building should not be crossed with power conductors, however, if the power conductor is 250 volts or less what is the minimum clearance allowed?

    <p>24 inches</p> Signup and view all the answers

    Which of the following is a cause for wavy and buckled photovoltaic raceways?

    <p>Thermal expansion</p> Signup and view all the answers

    What consideration(s) must an electrician take when installing photovoltaic raceways?

    <p>All of the above</p> Signup and view all the answers

    How would you wire a circuit to get voltage to add up to the desired value?

    <p>Series</p> Signup and view all the answers

    Which of the following is not considered to be a raceway?

    <p>Auxiliary gutters</p> Signup and view all the answers

    Mobile home service equipment shall be located adjacent to the mobile home and shall be located in sight no more than ___ feet from the exterior wall of the mobile home it serves.

    <p>30</p> Signup and view all the answers

    How many receptacles are required in a residential garage?

    <p>1</p> Signup and view all the answers

    Which of the following allows for the use of an ungrounded battery system?

    <p>Photovoltaic DC circuits</p> Signup and view all the answers

    In a simple series circuit, current:

    <p>Remains the same</p> Signup and view all the answers

    Which of the following can be used as an acceptable grounding electrode?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is the largest conductor size?

    <p>0000</p> Signup and view all the answers

    What is another term for a concrete-encased electrode?

    <p>Ufer ground</p> Signup and view all the answers

    What is a mechanically integrated assembly of modules or panels with a support structure and foundation, tracker, and other components that create a direct-current power-producing unit?

    <p>Array</p> Signup and view all the answers

    A module is a complete, environmentally protected unit consisting of solar cells, optics and other components, exclusive of tracker, designated to generate:

    <p>DC power</p> Signup and view all the answers

    A grounding electrode must be in contact with soil a minimum:

    <p>8 feet</p> Signup and view all the answers

    How many GFCIs are required in a residential bathroom?

    <p>1</p> Signup and view all the answers

    The neutral conductor is connected to the neutral point of a system and is intended to carry current under normal conditions. In the code, the neutral is often referred to as the:

    <p>Grounded conductor because it is intentionally grounded</p> Signup and view all the answers

    A raceway that is 24 inches or less in length can be filled to _____ of its total cross-sectional area.

    <p>60%</p> Signup and view all the answers

    What is the maximum cross-sectional area allowed for two or more conductors or cables in tubing or conduit?

    <p>40%</p> Signup and view all the answers

    A power meter must be a minimum of ____ feet away from any door, gas meter, or window opening.

    <p>3</p> Signup and view all the answers

    Which of the following grounding electrodes must be bonded together?

    <p>All of the above</p> Signup and view all the answers

    What do you call a conductor installed on the supply side of a service or within a service enclosure, that ensures the required electrical connectivity between metal parts?

    <p>Bonding jumper</p> Signup and view all the answers

    A 20-amp receptacle can have a maximum cord and plug load of:

    <p>16 amps</p> Signup and view all the answers

    If an overhead service conductor is less than 600v, what is the minimum height that conductor can be over public roads, alleys, and parking areas subject to traffic?

    <p>18 ft</p> Signup and view all the answers

    Conductors entering buildings shall be protected:

    <p>To the point of entrance</p> Signup and view all the answers

    What is the minimum distance that grounding electrodes should be spaced?

    <p>6 feet</p> Signup and view all the answers

    The power meter should be within ____ feet of the front corner of a residence.

    <p>10</p> Signup and view all the answers

    A standalone solar PV system should be able to supply:

    <p>120V single-phase, 3-wire, 120/240-volt service</p> Signup and view all the answers

    If you have a 250' straight wire pull and a pull box with 4" conduit going in and out, what is the minimum length pull box you must use?

    <p>32 inches</p> Signup and view all the answers

    How would a contractor protect conductors from abrasion during installation?

    <p>Ensure raceways are mechanically complete</p> Signup and view all the answers

    Receptacles must have their grounding conductor contacts connected to:

    <p>The green grounding wire</p> Signup and view all the answers

    When are you required to guard or install PV source or output circuits?

    <p>Greater than 30 volts</p> Signup and view all the answers

    Underground cables and conductors under buildings shall be in:

    <p>A raceway</p> Signup and view all the answers

    What is the minimum length of a concrete-encased grounding electrode?

    <p>20 feet</p> Signup and view all the answers

    The utility company feeds a residential structure a ______ service.

    <p>240V</p> Signup and view all the answers

    Which of the following is a photovoltaic array that has two outputs, each having opposite polarity to a common reference point or center point?

    <p>Bipolar photovoltaic array</p> Signup and view all the answers

    If a feeder supplies continuous and non-continuous loads, the minimum feeder conductor size shall have an allowable ampacity no less than the non-continuous load plus ______ of the continuous load.

    <p>125%</p> Signup and view all the answers

    What is the minimum depth a cable or conductor can be directly buried under a 4" thick slab of concrete?

    <p>18 inches</p> Signup and view all the answers

    At what voltage are you required to provide guarding of live parts?

    <p>50 volts</p> Signup and view all the answers

    Which of the following locations should an electrician install a 20-amp laundry circuit?

    <p>Dwelling unit</p> Signup and view all the answers

    Which of the following is a thin-walled raceway?

    <p>EMT</p> Signup and view all the answers

    What is the maximum disconnect height?

    <p>6'7&quot;</p> Signup and view all the answers

    When sizing an Uninterrupted Power Supply (UPS) battery, which component will generate the proper amount of electricity withdrawal?

    <p>Load bank</p> Signup and view all the answers

    Which of the following conductors are used for service drops?

    <p>Copper and aluminum</p> Signup and view all the answers

    If an overhead service conductor is 150V or less, what is the minimum height that runs above grade but in areas that are only accessible to pedestrian traffic?

    <p>10 ft</p> Signup and view all the answers

    What do you consider two or more electrodes that are bonded together?

    <p>A single grounding electrode system</p> Signup and view all the answers

    Which device is installed in the photovoltaic source circuit or PV output circuit that can provide an output DC voltage and current higher or lower value than the input DC voltage and current?

    <p>DC to DC converter</p> Signup and view all the answers

    If the minimum size of an underground service conductor is 8 AWG for copper, what is the minimum underground service conductor size for aluminum?

    <p>6 AWG</p> Signup and view all the answers

    What is another term for an inverter?

    <p>Power Conditioning Unit</p> Signup and view all the answers

    If a service conductor is over 300V but less than 600V, what is the minimum clearance of that service conductor if it runs in residential and commercial areas that are not subject to traffic?

    <p>15 ft</p> Signup and view all the answers

    Most residential homes require a minimum _____ main to handle all electrical needs.

    <p>100A</p> Signup and view all the answers

    Which of the following defines a unit that contains buses, automatic overcurrent devices, switches, and is designed to be placed against a wall, partition, or other support?

    <p>Panelboard</p> Signup and view all the answers

    What is the smallest grounding electrode conductor for an electric service over 1100 kcmil copper conductors?

    <p>3/0 copper</p> Signup and view all the answers

    A rod-type grounding electrode should have a diameter of ____ unless listed.

    <p>5/8 in.</p> Signup and view all the answers

    Which of the following is the smallest conductor?

    <p>AWG 24</p> Signup and view all the answers

    All ungrounded photovoltaic DC conductors require disconnecting means that are readily accessible. If this is true, then where can you not install a PV disconnecting means?

    <p>Bathrooms</p> Signup and view all the answers

    What type of circuits or wiring cannot be in the same raceway?

    <p>PV source circuits and PV output circuits</p> Signup and view all the answers

    What is the maximum distance a service conductor can run over a roof to a service mast?

    <p>6 feet</p> Signup and view all the answers

    Which of the following is not an acceptable grounding electrode?

    <p>Metal underground gas piping or aluminum electrodes</p> Signup and view all the answers

    Which of the following is NOT a name for flexible conduit?

    <p>RRT</p> Signup and view all the answers

    A 15-amp receptacle can have a maximum cord and plug load of:

    <p>12 amps</p> Signup and view all the answers

    What is the primary purpose of a main lug load center?

    <p>As a distribution panel</p> Signup and view all the answers

    In the main panel, how many slots will a standard 120-volt breaker require?

    <p>1</p> Signup and view all the answers

    When running RMC or IMC through a concrete slab (4-in thick), what is the minimum depth required?

    <p>4 inches</p> Signup and view all the answers

    Which of the following must be identified at all point of termination, connections and splices?

    <p>All of the above</p> Signup and view all the answers

    How do you ground a transformer 480v on the primary and 120/208 secondary?

    <p>Neutral and ground to be connected at the same point within the transformer</p> Signup and view all the answers

    If a conductor is 1000V or less, what is the minimum height of a service conductor that runs above a roof?

    <p>8 ft</p> Signup and view all the answers

    Which of the following has to be located within 10 feet of the meter?

    <p>Main breaker panel</p> Signup and view all the answers

    Which of the following conduit raceways are used in commercial or industrial applications due to its resistance against mechanical damage?

    <p>GRC</p> Signup and view all the answers

    Cooking appliances that are fastened in place, such as a stove, should be supplied by a:

    <p>40- and 50-amp branch circuit</p> Signup and view all the answers

    Which of the following materials are not allowed to be used for grounding electrodes?

    <p>Aluminum</p> Signup and view all the answers

    In the main panel, how many slots will a standard 240-volt breaker require?

    <p>2</p> Signup and view all the answers

    A 30-amp receptacle can have a maximum cord and plug load of:

    <p>24 amps</p> Signup and view all the answers

    What kind of branch circuit should be able to supply lighting units or other energy utilization equipment?

    <p>15- and 20-amp branch circuit</p> Signup and view all the answers

    When installing photovoltaic source circuits, the maximum current shall be the sum of parallel module-rated short-circuit currents multiplied by:

    <p>125%</p> Signup and view all the answers

    A circuit over 150V to ground containing fuses must have a means of disconnecting at:

    <p>The supply side of all fuses</p> Signup and view all the answers

    Which of the following is NOT a permitted method for grounding and its connections?

    <p>Soldered connections</p> Signup and view all the answers

    What is the minimum size copper equipment grounding conductor for a 1600 ampere overcurrent device?

    <p>4/0</p> Signup and view all the answers

    What is the maximum number of switches or circuit breakers allowed to disconnect and isolate the service from all other equipment?

    <p>6</p> Signup and view all the answers

    When placed within an enclosed space or building, how should DC wiring be installed?

    <p>In metallic conduit or raceways</p> Signup and view all the answers

    What is the smallest size overhead service conductor allowed by the Electrical Code?

    <p>No. 8 AWG copper</p> Signup and view all the answers

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