ARTICLE 430 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
A motor controller shall open all conductors to the motor where not used as a disconnecting means.
True - Answers False 430.84
Motor control circuits shall be arranged so they will be disconnected from all sources of supply when
the disconnecting means is in the open position. - Answers True
The motor _____ currents listed in Tables 430.247 through 430.250 shall be used to determine the
ampacity of motor circuit conductors and short-circuit and ground-fault protection devices. - Answers
full-load
A _____ rated in amperes shall be permitted as a controller for all motors. - Answers branch-circuit
inverse time circuit breaker and molded case switch
The motor controller shall have horsepower ratings at the application voltage not _____ the
horsepower rating of the motor. - Answers Lower than
The disconnecting means for the controller and motor shall open all ungrounded supply conductors. -
Answers True
Overcurrent protection for motor control circuits shall not exceed _____ percent if the conductor is
based on Table 310. 15(B)(17) and does not extend beyond the motor control equipment enclosure. -
Answers 400 430.72(B)(2) and Table 430.72(B), Column B, Note 2
A feeder supplying fixed motor load(s) shall have a protective device with a rating or setting _____
branch-circuit short-circuit and ground-fault protective device for any motor in the group, plus the
sum of the full-load currents of the other motors of the group. - Answers not greater than the largest
rating or setting of the
A _____ shall be located in sight from the motor location and the driven machinery location. -
Answers disconnecting means
Each motor shall be provided with an individual controller. - Answers True
Conductors supplying several motors shall not be sized smaller than _____ percent of the full-load
current rating of the highest rated motor, plus the sum of the full-load current ratings of all other
motors in the group, plus the ampacity of other loads. - Answers 125
Where more than one motor disconnecting means is provided in the same motor branch circuit, at
least one of the disconnecting means shall be readily accessible. - Answers True
Feeder tap conductors supplying motor circuits, with an ampacity at least one-third that of the
feeder, shall not exceed _____ ft. in length. - Answers 25 430.28(2)
Unless overload protection is provided by other approved means, the minimum number of overload
units required for a three-phase alternating-current motor is _____. - Answers Three
If a motor disconnecting means is a motor-circuit switch, it shall be rated in _____. - Answers
horsepower
The motor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying
the _____ current of the motor. - Answers Starting
The motor disconnecting means shall not be required to be in sight from the motor and the driven
machinery location, provided _____. - Answers the controller disconnecting means is lockable, in
accordance with 110. 25
locating the motor disconnecting means within sight of the motor is impractical
locating the motor disconnecting means within sight of the motor introduces additional or increased
hazards to people or property
Overload devices are intended to protect motors, motor control apparatus, and motor branch-circuit
conductors against _____. - Answers excessive heating due to motor overloads
excessive heating due to failure to start
The disconnecting means for a motor controller shall be designed so that it cannot _____
automatically. - Answers Close
Where the motor short-circuit and ground-fault protection devices determined by Table 430.52 do
not correspond to the standard sizes or ratings, a higher rating that does not exceed the next higher
standard ampere rating shall be permitted. - Answers True
A horsepower-rated _____ having a horsepower rating not less than the motor rating shall be
permitted to serve as the disconnecting means. - Answers attachment plug and receptacle
flanged surface inlet and cord connector
430.109(F)
A motor controller shall open all conductors to the motor where not used as a disconnecting means.
True - Answers False 430.84
Motor control circuits shall be arranged so they will be disconnected from all sources of supply when
the disconnecting means is in the open position. - Answers True
The motor _____ currents listed in Tables 430.247 through 430.250 shall be used to determine the
ampacity of motor circuit conductors and short-circuit and ground-fault protection devices. - Answers
full-load
A _____ rated in amperes shall be permitted as a controller for all motors. - Answers branch-circuit
inverse time circuit breaker and molded case switch
The motor controller shall have horsepower ratings at the application voltage not _____ the
horsepower rating of the motor. - Answers Lower than
The disconnecting means for the controller and motor shall open all ungrounded supply conductors. -
Answers True
Overcurrent protection for motor control circuits shall not exceed _____ percent if the conductor is
based on Table 310. 15(B)(17) and does not extend beyond the motor control equipment enclosure. -
Answers 400 430.72(B)(2) and Table 430.72(B), Column B, Note 2
A feeder supplying fixed motor load(s) shall have a protective device with a rating or setting _____
branch-circuit short-circuit and ground-fault protective device for any motor in the group, plus the
sum of the full-load currents of the other motors of the group. - Answers not greater than the largest
rating or setting of the
A _____ shall be located in sight from the motor location and the driven machinery location. -
Answers disconnecting means
Each motor shall be provided with an individual controller. - Answers True
Conductors supplying several motors shall not be sized smaller than _____ percent of the full-load
current rating of the highest rated motor, plus the sum of the full-load current ratings of all other
motors in the group, plus the ampacity of other loads. - Answers 125
Where more than one motor disconnecting means is provided in the same motor branch circuit, at
least one of the disconnecting means shall be readily accessible. - Answers True
Feeder tap conductors supplying motor circuits, with an ampacity at least one-third that of the
feeder, shall not exceed _____ ft. in length. - Answers 25 430.28(2)
Unless overload protection is provided by other approved means, the minimum number of overload
units required for a three-phase alternating-current motor is _____. - Answers Three
If a motor disconnecting means is a motor-circuit switch, it shall be rated in _____. - Answers
horsepower
The motor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying
the _____ current of the motor. - Answers Starting
The motor disconnecting means shall not be required to be in sight from the motor and the driven
machinery location, provided _____. - Answers the controller disconnecting means is lockable, in
accordance with 110. 25
locating the motor disconnecting means within sight of the motor is impractical
locating the motor disconnecting means within sight of the motor introduces additional or increased
hazards to people or property
Overload devices are intended to protect motors, motor control apparatus, and motor branch-circuit
conductors against _____. - Answers excessive heating due to motor overloads
excessive heating due to failure to start
The disconnecting means for a motor controller shall be designed so that it cannot _____
automatically. - Answers Close
Where the motor short-circuit and ground-fault protection devices determined by Table 430.52 do
not correspond to the standard sizes or ratings, a higher rating that does not exceed the next higher
standard ampere rating shall be permitted. - Answers True
A horsepower-rated _____ having a horsepower rating not less than the motor rating shall be
permitted to serve as the disconnecting means. - Answers attachment plug and receptacle
flanged surface inlet and cord connector
430.109(F)
