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10 Cards in this Set
- Front
- Back
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The additional service disconnecting menas for fire pumps, emergency systems, legally required standby, or optional standby services, shall be installed remote from the one to six service disconnecting means for normal service to minimize the possibility of ----- interruption of supply.
A. intentional B. accidental C. simultaneous D. prolonged |
C
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In grounded systems, electrical equipment, wiring and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedence circuit from any point on the wiring system to the electrical supply source to facilitate the operation of overcurrent devices should a(n) ---- from a different phase occur on the wiring system.
A. isolated ground B. second ground fault C. arc fault D. high impedance fault |
B
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Grounded electrical systems shall be connected to earth in a manner that will ------.
A. limit voltages due to lightning, line surges, or unintentional contact with higher-voltage lines B. stabilize the voltage-to-ground during normal operation C. facilitate overcurrent device operation in case of ground faults D. a and b |
D
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The grounding conductor connection to the grounding electrode shall be made by ----.
A. listed lugs B. exothermic welding C. listeed pressure connectors D. any of these |
D
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Grounding conductors and bonding jumpers shall be connected by ------.
A. listed pressure connectors B. terminal bars C. exothermic welding D. any of these |
D
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Overhead Type SE cable can be formed in a ------ and taped with self-sealing weather-resistant thermoplastic.
A. loop B. circle C. gooseneck D. none of these |
C
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Where documented safe switching procedures are established and maintained and monitored by ----- individuals, the disconnecting means for a building supplied by a feeder can be located elsewhere on the premises.
A. maintenance B. management C. service D. qualified |
D
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Ground clamps and fittings shall be protected from physical damage by being enclosed in ------ where ther may be a possibility of physical damage.
A. metal B. wood C. the equivalent of a or b D. non of these |
C
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For a single separately derived system, the grounding electrode conductor connects the grounding electrode to the grounded conductor of the derived system at the same point on the separately derrive system wher the ------ is connected.
A. metering equipment B. transfer switch C. system bonding jumper D. largest circuit breaker |
C
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Service metal raceways and metal-clad cables are considered effectively bonded when using threadless couplings and connectors that are -------.
A. nonmetallic B. made up tight C. sealed D. classified |
B
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