Quarter 2 Year 3 Exam
For permanently connected motor-operated appliances with motors rated over _____, a switch or circuit breaker located within sight from the motor-operated appliance or be capable of being locked in the open position in compliance with 110.25, can serve as the appliance disconnect.
1/8 hp
The ampacity of the conductors from the generator output terminals to the first distribution device(s) containing overcurrent protection shall not be less than _____ percent of the nameplate current rating of the generator.
115
The branch-circuit overcurrent device and conductors for fixed storage-type water heater having a capacity of _____ gallons or less shall be sized not smaller than 125 percent of the rating of the water heater.
120
Branch-circuit conductors for fixed electric space-heating equipment and any associated motors shall be sized not smaller than _____ percent of the load.
125
Each motor used in a continuous duty application and rated more than 1 hp shall be protected against overload by a separate overload device that is responsive to motor current. The overload device for motors with a marked temperature rise 40°C or less, shall be rated at no more than _____ percent of the motor nameplate full-load current rating.
125
The branch circuit rating for nonmotor-operated appliances that are continuously loaded shall have the branch-circuit rating sized not less than _____ percent of the appliance marked ampere rating, unless otherwise listed.
125
The branch-circuit overcurrent device and conductors for fixed storage-type water heaters that have a capacity of 120 gal or less shall be sized not smaller than _____ percent of the rating of the water heater.
125
Branch-circuit conductors supplying a single continuous-duty motor shall have an ampacity not less than _____ rating.
125 percent of the motor\'s full-load current rating as determined by 430.6(A)(1)
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.
125%
Generators with greater than _____ kW rating shall be provided with a remote emergency stop switch to shut down the prime mover.
15
For permanently connected appliances rated at not over _____ VA or 1/8 hp, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is capable of being locked in the open position in accordance with 110.25.
300
For permanently connected appliances rated over _____ VA, the branch-circuit switch or circuit breaker can serve as the disconnecting means where the switch or circuit breaker is within sight from the appliance or is capable of being locked in the open position in accordance with 110.25.
300
Motor control circuit conductors that extend beyond the motor control equipment enclosure shall have short-circuit and ground-fault protection sized not greater than _____ percent of the value specified in Table 310.16 for 60°C conductors.
300
An in-sink waste disposer can be cord-and-plug-connected, but the cord shall not be less than 18 in. or more than _____ in. in length.
36
The length of the cord for a trash compactor shall not be longer than _____ ft, measured from the face of the attachment plug to the plane of the rear of the appliance.
4
Overcurrent protection for motor control circuits shall not exceed _____ percent if the conductor is based on Table 310.17 and does not extend beyond the motor control equipment enclosure.
400
The rules of Article _____, as applicable, shall apply to air-conditioning and refrigerating equipment that does not incorporate a hermetic refrigerant motor-compressor.
422, 424, 430 (any of these)
Article _____ covers fixed electric equipment used for space heating including heating cables, unit heaters, boilers, central heating systems, or other fixed electric space-heating equipment.
424
Stationary generators _____ and less shall be listed.
600V
For grounded systems, the earth is considered an effective ground-fault current path
False
For general motor applications, the motor branch-circuit short-circuit and ground-fault protection device shall be sized based on the _____ values.
NEC Table
An important consideration for limiting imposed voltage on electrical systems is to remember that bonding and grounding electrode conductors should not be any longer than necessary and unnecessary bends and loops should be avoided.
True
For grounded systems, normally noncurrent-carrying conductive materials enclosing electrical conductors or equipment shall be connected to earth so as to limit the voltage-to-ground on these materials.
True
The grounding of electrical systems, circuit conductors, surge arresters, surge-protective devices, and conductive normally noncurrent-carrying metal parts of equipment shall be installed and arranged in a manner that will prevent objectionable current.
True
The receptacle for a cord connected range hood is permitted to be supplied by _____.
an individual branch circuit
The ampacities of branch circuit conductors for appliances shall not be less than the marked rating of the _____.
appliance
A horsepower-rated _____ having a horsepower rating not less than the motor rating shall be permitted to serve as the disconnecting means.
attachment plug and receptacle or flanged surface inlet and cord connector
Appliances such as _____ rated 150V or less to ground and 60A or less, single- or three-phase, shall be provided with Class A GFCI protection for personnel.
automotive vacuum machines, drinking water coolers and bottle fill stations, cord-and-plug-connected high-pressure spray washing machines (all of these)
Ground-fault circuit-interrupter protection for personnel shall be provided for cables installed in electrically heated floors of _____.
bathrooms, hydromassage bathtub locations, kitchens (all of these)
Electrically conductive materials that are likely to _____ in ungrounded systems shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for ground-fault current that is capable of carrying the maximum fault current likely to be imposed on it.
become energized
A _____ rated in amperes shall be permitted as a controller for all motors.
branch-circuit inverse time circuit breaker or molded case switch
Where the flexible cord for a built-in dishwasher passes through an opening, it shall be protected against damage by a(an) _____.
bushing, grommet, approved means (any of these)
Flexible cord for appliances is permitted to _____.
connect appliances to facilitate their frequent interchange, prevent the transmission of noise, facilitate the removal or disconnection of appliances that are fastened in place for maintenance or repair and the appliance is intended or identified for flexible cord connection. (any of these)
For ungrounded systems, noncurrent-carrying conductive materials enclosing electrical conductors or equipment shall be connected to the _____ in a manner that will limit the voltage imposed by lightning or unintentional contact with higher-voltage lines.
earth
For grounded systems, normally noncurrent-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the _____ to establish an effective ground-fault current path.
electrical supply source
Overload devices are intended to protect motors, motor control apparatus, and motor branch-circuit conductors against _____.
excessive heating due to motor overloads and excessive heating due to failure to start
Branch-circuit conductors for fixed electric space-heating equipment and any associated motors shall be sized not smaller than 150 percent of the load.
false
Conductors supplying several motors, or a motor(s) and other load(s), shall have an ampacity not less than the sum of 125 percent of the full-load current rating of the highest rated motor plus the sum of the full-load current ratings of all the other motors in the group and 100 percent of the remaining noncontinuous and continuous nonmotor loads.
false
Means shall be provided to simultaneously disconnect the _____ of all fixed electric space-heating equipment from all ungrounded conductors.
heater, motor controller(s), and supplementary overcurrent device(s) (all of these)
If a motor disconnecting means is a motor-circuit switch, it shall be rated in _____.
horsepower
An individual disconnecting means shall be provided for each motor controller and be located _____ from the controller location.
in sight
The receptacle for a built-in dishwasher shall be located _____ adjacent to the space occupied by the dishwasher.
in the space
The receptacle for a trash compactor shall be located _____ occupied by the appliance.
in the space or adjacent to the space
Central heating equipment, other than fixed electric space-heating equipment, shall be supplied by a(an) _____ branch circuit.
individual
For cord-and-plug- (or attachment fitting-) connected appliances, a(an) _____ plug (or attachment fitting) and receptacle combination shall be permitted to serve as the disconnecting means.
labeled
Grounded electrical systems shall be connected to earth in a manner that will _____.
limit voltages due to lightning, line surges, or unintentional contact with higher-voltage lines and stabilize the voltage-to-ground during normal operation
Equipment grounding conductors, grounding electrode conductors, and bonding jumpers shall be connected by _____.
listed pressure connectors, terminal bars, and exothermic welding (any of these)
An in-sink waste disposer can be cord-and-plug-connected, but receptacles shall be _____ to protect against physical damage to the flexible cord.
located
For transformers, other than Class 2 and Class 3, a means is required to disconnect all transformer ungrounded primary conductors. The disconnecting means shall be located within sight of the transformer unless the disconnect _____.
location is field marked on the transformer and is lockable open in accordance with 110.25
Ground clamps and fittings that are exposed to physical damage shall be enclosed in _____ or equivalent protective covering.
metal or wood
A motor disconnecting means can be a listed _____.
molded case circuit breaker, motor-circuit switch rated in horsepower, molded case switch ( any of these)
Part IV of Article 430 specifies devices intended to protect _____ against overcurrent due to short circuits or ground faults.
motor branch-circuit conductors, motor control apparatus, motors ( all of these)
Generators shall have the _____ conductor sized not smaller than required to carry the maximum unbalanced current as determined by 220.61.
neutral
Disconnecting means for air-conditioning or refrigerating equipment can be installed _____ the air-conditioning or refrigerating equipment, but not on panels that are designed to allow access to the equipment, and not over the equipment nameplate.
on or within
Where a panelboard is supplied through a transformer, the overcurrent protection shall be located _____.
on the secondary side of the transformer
Ceiling-suspended (paddle) fans shall be supported independently of an outlet box or by a listed _____.
outlet box or listed outlet box system identified for the use and installed in accordance with 314.27(C) or outlet box system, a listed locking support and mounting receptacle, and a compatible factory installed attachment fitting designed for support, identified for the use and installed in accordance with 314.27(E)
For other than cord-and-plug-connected portable generators, an emergency shutdown device for a dwelling unit shall be located _____ at a readily accessible location.
outside the dwelling unit
In ungrounded systems, electrical equipment, wiring, and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedance circuit from any point on the wiring system to the electrical supply source to facilitate the operation of overcurrent devices should a(an) _____ fault from a different phase occur on the wiring system.
second ground
A motor can be provided with combined overcurrent protection using a single protective device to provide branch-circuit _____ protection where the rating of the device provides the overload protection specified in 430.32.
short-circuit, ground-fault, motor overload ( all of these)
Duct heater controller equipment shall have a disconnecting means installed within _____ the controller except as allowed by 424.19(A).
sight from
Each appliance shall have a means that _____ disconnects all ungrounded circuit conductors.
simultaneously
Appliances such as _____ rated 150V or less to ground and 60A or less, single- or three-phase, shall be provided with Class A GFCI protection for personnel.
tire inflation machines, vending machines, sump pumps (all of these)
Transformer top surfaces that are horizontal and readily accessible shall be marked _____.
to prohibit storage
In grounded systems, normally noncurrent-carrying electrically conductive materials that are likely to become energized shall be connected _____ in a manner that establishes an effective ground-fault current path.
together and to the electrical supply source
A branch-circuit overcurrent device can serve as the disconnecting means for a stationary motor of 1/8 hp or less.
true
Article 440 applies to electric motor-driven air-conditioning and refrigerating equipment that has a hermetic refrigerant motor-compressor.
true
Article 445 contains installation and other requirements for generators.
true
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.
true
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.
true
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.
true
The equipment grounding conductor terminal bar of a dry-type transformer shall be bonded to the enclosure in accordance with 250.12 and shall not be installed on or over any _____.
vented portion of the enclosure
The branch-circuit overcurrent device and conductors for fixed storage-type water heater having a capacity of 120 gallons or less shall be sized not smaller than 125 percent of the rating of the _____.
water heater
If a branch circuit supplies a single nonmotor-operated appliance, the rating of overcurrent protection shall not exceed _____ percent of the appliance rated current if the overcurrent protection rating is not marked and the appliance is rated over 13.30A.
150
The maximum dual-element time-delay fuse branch circuit protection for a single-phase motor is _____ percent of the appropriate current rating found in Table 430.248.
175
If a branch circuit supplies a single nonmotor-operated appliance, the rating of overcurrent protection shall not exceed _____ if the overcurrent protection rating is not marked and the appliance is rated 13.30A or less.
20A
The maximum rating or setting of an inverse time breaker used as the motor branch-circuit short-circuit and ground-fault protective device for a single-phase motor is _____ percent of the full-load current given in Table 430.248.
250
Article _____ covers motors, motor branch-circuit and feeder conductors and their protection, motor overload protection, motor control circuits, motor controllers, and motor control centers.
430
The length of the cord for a built-in dishwasher shall not be longer than _____ ft, measured from the face of the attachment plug to the plane of the rear of the appliance.
6.50
For stationary motors of 2 hp or less and 300V or less on ac circuits, the controller can be an ac-rated only general-use snap switch where the motor full-load current rating is not more than _____ percent of the rating of the switch.
80
The maximum instantaneous trip breaker branch circuit protection for a single-phase motor is _____ percent of the appropriate current rating found in Table 430.52.
800
For grounded systems, electrical equipment and other electrically conductive material likely to become energized shall be installed in a manner that creates a _____ from any point on the wiring system where a ground fault may occur to the electrical supply source.
circuit facilitating the operation of the overcurrent device, low-impedance circuit, and circuit capable of safely carrying the ground-fault current likely to be imposed on it (all of these)
A _____ shall be located in sight from the motor location and the driven machinery location.
disconnecting means
The flexible appliance cord for a(an) _____ shall have an equipment grounding conductor and be terminated with a grounding-type attachment plug
dishwasher, in-sink water disposer, or range hood (all of these)
Range hoods shall be permitted to be cord-and-plug-connected with a flexible cord identified as suitable for use on range hoods in the installation instructions of the appliance manufacturer provided the range hood is part of a microwave oven assembly.
false
Receptacles for built-in dishwashers and trash compactors shall be located to protect against physical damage to the _____.
flexible cord
In determining the highest rated motor for purposes of complying with 430.24, 430.53(B), and 430.53(C), the highest rated motor shall be based on the rated full-load current as selected _____.
from Tables 430.247, 430.248, 430.249, and 430.250
Transformers with ventilating openings shall be installed so that the ventilating openings are _____.
not blocked by walls or obstructions
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.
not greater than the largest rating or setting of the
The motor controller shall have horsepower ratings at the application voltage _____ the horsepower rating of the motor.
not lower than
A unit switch with a marked \"_____\" position that is part of a fixed space heater, and disconnects all ungrounded conductors, shall be permitted to serve as the required disconnecting means.
off
Wall-mounted ovens and counter-mounted cooking units shall be permitted to be connected with a flexible cord identified as _____ for the purpose.
suitable
Range hoods shall be permitted to be cord-and-plug-connected with a flexible cord identified as suitable for use on range hoods in the installation instructions of the appliance manufacturer provided _____.
the length of the cord is not less than 18 in. and not over 4 ft, receptacles are located to protect against physical damage to the flexible cord, the receptacle is supplied by an individual branch circuit (all of these)
Dry-type transformers 1,000V, nominal, or less, and not exceeding _____ kVA that are installed in hollow spaces of buildings and not permanently closed in by the structure, shall not be required to be readily accessible.
50
The disconnecting means for air-conditioning and refrigerating equipment shall be readily accessible and not more than _____ ft from the air-conditioning or refrigerating equipment.
50
Multimotor and combination-load air-conditioning equipment shall be provided with a visible nameplate marked with the minimum supply circuit conductor ampacity and the maximum rating of the branch-circuit short-circuit and ground-fault protective device.
true
Circuit conductors on the output of an adjustable-speed drive system are susceptible to breakdown under certain conditions. Factors affecting the conductors include but are not limited to the output _____.
voltage, frequency, or current (any of these)
Where air-conditioning and refrigeration equipment is installed outdoors on a roof, a(an) _____ conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use compression-type fittings.
equipment grounding
Motors shall be located so that adequate _____ is provided and so that maintenance, such as lubrication of bearings and replacing of brushes, can be readily accomplished.
space
For ungrounded systems, noncurrent-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for ground-fault current that is capable of carrying _____.
the maximum fault current likely to be imposed on it
Circuit conductors on the output of an adjustable-speed drive system are susceptible to breakdown under certain conditions due to the characteristics of the output waveform of the drive.
true
