Grounding

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Author:
PBJay
ID:
59890
Filename:
Grounding
Updated:
2011-01-15 00:29:18
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Grounding
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Description:
Grounding Requirements for a Single Dwelling 030203e
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  1. When a bonding jumper and a grounding bushing is installed to supplement locknuts for service equipment bonding to ground, the size of
    jumper conductor is based on Table ____, and Rule ________.
    • When a bonding jumper and a grounding bushing is installed to supplement locknuts for service equipment bonding to ground, the size of
    • jumper conductor is based on Table _41_, and Rule _10-614__.
  2. A 1.2 m length of EMT is used to provide mechanical protection for a non-metallic sheathed cable supplying a dryer receptacle. This protective sleeve should be bonded to ground. True or False
    • A 1.2 m length of EMT is used to provide mechanical protection for a non-metallic sheathed cable supplying a dryer receptacle. This protective sleeve should be bonded to ground. False
    • 10-304
  3. The conductor to be grounded for a single phase 3-wire service shall be the identified neutral conductor.
    True or False
    • The conductor to be grounded for a single phase 3-wire service shall be the identified neutral conductor.
    • True 10-210
  4. If you wished to know the requirements for attaching a grounding conductor to a water pipe electrode you would check in the subsection
    titled "Grounding and Bonding Conductor Connections".
    True or False
    • If you wished to know the requirements for attaching a grounding conductor to a water pipe electrode you would check in the subsection
    • titled "Grounding and Bonding Conductor Connections".
    • True 10-902
  5. Which of the following metal parts of non-electrical equipment shall be bonded to ground ?
    A) tracks and frames of electric cranes
    B) protective grill work around 1000 V conductors
    C) rural residential water supply systems
    D) all of the above
    • Which of the following metal parts of non-electrical equipment shall be bonded to ground ?
    • D) all of the above
  6. The term "grounded" means ...
    • The term "grounded" means connected effectually with the general mass of earth through a grounding path of sufficiently low impedance
    • and having an ampacity sufficient at all times, under the most severe conditions which are liable to arise in practice, to prevent any current in
    • the grounding conductor from causing a harmful voltage to exist.
  7. Where a single-dwelling is supplied with a single-phase three-wire service, the meter socket shall be bonded to ground by connecting the grounded circuit conductor (neutral) to the case of the socket.
    True or False
    • Where a single-dwelling is supplied with a single-phase three-wire service, the meter socket shall be bonded to ground by connecting the grounded circuit conductor (neutral) to the case of the socket.
    • True 10-624
  8. The minimum size of conductor for bonding non-electrical equipment such as metal gas piping or metal sewer (waste water) lines to ground
    is:
    A)# 8 AWG copper
    B) # 6 AWG copper
    C) # 4 AWG aluminum
    • The minimum size of conductor for bonding non-electrical equipment such as metal gas piping or metal sewer (waste water) lines to ground is:
    • A)# 8 AWG copper
    • B) # 6 AWG copper
    • C) # 4 AWG aluminum
    • 10-406
  9. The grounding connection for an ac system serving one building shall have:
    A) the grounding connection made on the supply side of the service disconnecting means
    B) at least two additional connections to grounding electrodes at the transformer or elsewhere
    C) the grounding connection made on the load side of the service disconnecting means
    D) more than one of the above
    • The grounding connection for an ac system serving one building shall have:
    • A) the grounding connection made on the supply side of the service disconnecting means
    • B) at least two additional connections to grounding electrodes at the transformer or elsewhere
    • C) the grounding connection made on the load side of the service disconnecting means
    • D) more than one of the above
    • 10-204
  10. "Bonding" means ...
    • "Bonding" means a low impedance path obtained by permanently joining all non-current-carrying metal parts to assure electrical continuity
    • and having the capacity to conduct safely any current likely to be imposed on it.
  11. "Grounding conductor" means ...
    "Grounding conductor" means the conductor used to connect the service equipment or system to the ground electrode.
  12. Bonding conductor connections may not be made using:
    A) bolt-on lugs
    B) clamps
    C) compression connectors
    D) solder
    E) thermit weldin
    • Bonding conductor connections may not be made using:
    • A) bolt-on lugs
    • B) clamps
    • C) compression connectors
    • D) solder
    • E) thermit welding
    • Rule 10-906
  13. A main service has the following specifications:
    Main service box rating - 400 A
    Main fuse size - 300 A
    Main service conductor - 250 kcmil, R90 copper
    The minimum size of copper common grounding conductor is:
    A) #2 AWG
    B) #3 AWG
    C) #4 AWG
    D) #0 AWG
    • A main service has the following specifications: Main service box rating - 400 A Main fuse size - 300 A Main service conductor - 250 kcmil, R90 copper The minimum size of copper common grounding conductor is:
    • A) #2 AWG
    • B) #3 AWG
    • C) #4 AWG
    • D) #0 AWG
    • Table 41
  14. The specifications for a main service are as follows:
    Service box rating - 200 A
    Fuse size - 200 A
    Service conductors - 0000 AWG, R90 copper.
    The minimum size of copper conductor that can be used for SRBJ is:
    A) #2 AWG
    B) #3 AWG
    C) #4 AWG
    D) #6 AWG
    • The specifications for a main service are as follows:
    • Service box rating - 200 A
    • Fuse size - 200 A
    • Service conductors - 0000 AWG, R90 copper.
    • The minimum size of copper conductor that can be used for SRBJ is:
    • A) #2 AWG
    • B) #3 AWG
    • C) #4 AWG
    • D) #6 AWG
    • Table 16
  15. A single-phase, 3-wire, 120/240 V service shall have a connection to a grounding electrode.
    True or False
    • A single-phase, 3-wire, 120/240 V service shall have a connection to a grounding electrode.
    • True Rule 10-106
  16. The method of bonding at service equipment shall be assured by:
    A) the use of threadless couplings made up tight where electrical metallic tubing is used
    B) grounding bushings equipped with copper bonding jumpers
    C) the use of threaded hubs on enclosures made up tight where metallic rigid conduit is used
    D) All of the above
    • The method of bonding at service equipment shall be assured by:
    • A) the use of threadless couplings made up tight where electrical metallic tubing is used
    • B) grounding bushings equipped with copper bonding jumpers
    • C) the use of threaded hubs on enclosures made up tight where metallic rigid conduit is used
    • D) All of the above
    • Rule 10-604;10-606
  17. A single-phase, 3-wire, 120/240 V service is required to be grounded.
    True or False
    • A single-phase, 3-wire, 120/240 V service is required to be grounded.
    • True
    • Rule 10-106;10-210

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