Journeyman Electrician Practice Test- Solved
A 440 volts motor has a full load current of 34 amperes. what size disconnecting means
is required? - ANS-40 amperes
The rating of disconnecting means is 115% of full load current.34 * 1.15 = 39.1
amperes.The nearer rating is 40 amperes.
A continuous load is load where the maximum current is expected to continue
for ............ hours or more. - ANS-3
According to the NEC, fixed outdoor deicing and snow melting equipment is to be
considered as a _____ load. - ANS-Continuous
a continuous load is a load expected to continue for three (3) hours or more.The
installation requirements for fixed outdoor electric deicing and snow melting equipment,
fixed outdoor electric deicing and snow melting equipment shall be considered a
continuous load.When sizing conductors and overcurrent protection for the fixed
outdoor equipment you must take into consideration the equipment can operate over 3
hours, so it is considered a continuous load.
All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall
always require ........................................... - ANS-Ground fault circuit interceptor
Conductors with _____ marked on the insulation are NOT approved for use in a wet
location. - ANS-THHN
conductors with THHN insulation are approved for use in dry and damp locations only
and conductors with THWN, THHW, and THW insulation are recognized for use in dry
and wet locations.
Flexible cards may not be used in the following locations .......... - ANS-To replace a
fixed wiring of a structure
For a 300 ampere electrical circuit, what is the minimum size copper equipment
grounding conductor as per NEC? - ANS-4 awg
4 AWG is the minimum size wire for a 300 ampere circuit
For a building or structure where the meter enclosure is adjacent to the service
disconnecting means, it is permitted to ground the meter enclosure to the _____
conductor on the load side of the service disconnect if ground-fault protection is not
provided. - ANS-Grounded
The meter enclosure to be grounded by connection on the load side of the service
disconnect where (1) no ground-fault protection is installed, (2) the meter enclosure is
, adjacent to the service disconnecting means, and (3) the grounded service conductor is
not smaller than the size specified
For dwelling units, GFCI protection is required for all single-phase, 125-volt, 15- and 20-
ampere receptacles installed within six (6) feet of the top inside edge of the bowl of
sinks located in _____.
a. laundry rooms
b. bathrooms
c. garages
d. all of these areas - ANS-All of these areas
no matter what the location or room in a dwelling, where the 15- or 20-ampere, 125-volt
eceptacles are installed within six (6) feet from the top inside edge of the bowl of the
sink, GFCI protection must be provided to prevent a ground-fault shock hazard.
For stationary small motors rated less than .................., the branch circuit over current
device may serve as a controller. - ANS-1/ 8 horse power
Generally, in a movie theater the manual switch for controlling the emergency lighting
systems is permitted to be located _____. - ANS-in an accessible location in the lobby
apply buildings used as a theater or for a similar purpose. Section 520.8 mandates the
control of emergency systems in theaters to comply with the rules set forth in Article
700; Part V of Article 700 applies to the control of emergency lighting circuits. Section
700.21 does not permit a manual control switch for emergency lighting to be placed in a
motion picture projection booth or on a stage or platform; the switch shall be located in
the lobby or at a convenient accessible location.Emergency lighting systems are
designed and installed to maintain a specific degree of illumination for means of egress
of the building in the event of fire, or similar emergency, or if the normal power supply
fails.
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a
120/240 volt, single-phase, electrical system from the local utility company. What is the
MINIMUM size aluminum THW conductors required for use as service-entrance
conductors for this residence? - ANS-4/0 AWG
one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be sized
at an ampacity of not less than 83% of the service rating. Therefore, 200 amperes x
83% = 166 amperes; size 4/0 AWG THW aluminum conductors with an allowable
ampacity of 180 amperes should be selected for this dwelling.
If a 230 volts load is connected to 240 volts power source, what is the minimum voltage
that can be supplied to load as recommended by NEC? - ANS-228 volts
A 440 volts motor has a full load current of 34 amperes. what size disconnecting means
is required? - ANS-40 amperes
The rating of disconnecting means is 115% of full load current.34 * 1.15 = 39.1
amperes.The nearer rating is 40 amperes.
A continuous load is load where the maximum current is expected to continue
for ............ hours or more. - ANS-3
According to the NEC, fixed outdoor deicing and snow melting equipment is to be
considered as a _____ load. - ANS-Continuous
a continuous load is a load expected to continue for three (3) hours or more.The
installation requirements for fixed outdoor electric deicing and snow melting equipment,
fixed outdoor electric deicing and snow melting equipment shall be considered a
continuous load.When sizing conductors and overcurrent protection for the fixed
outdoor equipment you must take into consideration the equipment can operate over 3
hours, so it is considered a continuous load.
All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall
always require ........................................... - ANS-Ground fault circuit interceptor
Conductors with _____ marked on the insulation are NOT approved for use in a wet
location. - ANS-THHN
conductors with THHN insulation are approved for use in dry and damp locations only
and conductors with THWN, THHW, and THW insulation are recognized for use in dry
and wet locations.
Flexible cards may not be used in the following locations .......... - ANS-To replace a
fixed wiring of a structure
For a 300 ampere electrical circuit, what is the minimum size copper equipment
grounding conductor as per NEC? - ANS-4 awg
4 AWG is the minimum size wire for a 300 ampere circuit
For a building or structure where the meter enclosure is adjacent to the service
disconnecting means, it is permitted to ground the meter enclosure to the _____
conductor on the load side of the service disconnect if ground-fault protection is not
provided. - ANS-Grounded
The meter enclosure to be grounded by connection on the load side of the service
disconnect where (1) no ground-fault protection is installed, (2) the meter enclosure is
, adjacent to the service disconnecting means, and (3) the grounded service conductor is
not smaller than the size specified
For dwelling units, GFCI protection is required for all single-phase, 125-volt, 15- and 20-
ampere receptacles installed within six (6) feet of the top inside edge of the bowl of
sinks located in _____.
a. laundry rooms
b. bathrooms
c. garages
d. all of these areas - ANS-All of these areas
no matter what the location or room in a dwelling, where the 15- or 20-ampere, 125-volt
eceptacles are installed within six (6) feet from the top inside edge of the bowl of the
sink, GFCI protection must be provided to prevent a ground-fault shock hazard.
For stationary small motors rated less than .................., the branch circuit over current
device may serve as a controller. - ANS-1/ 8 horse power
Generally, in a movie theater the manual switch for controlling the emergency lighting
systems is permitted to be located _____. - ANS-in an accessible location in the lobby
apply buildings used as a theater or for a similar purpose. Section 520.8 mandates the
control of emergency systems in theaters to comply with the rules set forth in Article
700; Part V of Article 700 applies to the control of emergency lighting circuits. Section
700.21 does not permit a manual control switch for emergency lighting to be placed in a
motion picture projection booth or on a stage or platform; the switch shall be located in
the lobby or at a convenient accessible location.Emergency lighting systems are
designed and installed to maintain a specific degree of illumination for means of egress
of the building in the event of fire, or similar emergency, or if the normal power supply
fails.
Given: A one-family dwelling unit with a demand load of 200 amperes is supplied with a
120/240 volt, single-phase, electrical system from the local utility company. What is the
MINIMUM size aluminum THW conductors required for use as service-entrance
conductors for this residence? - ANS-4/0 AWG
one-family dwelling 120/240 volt, single-phase, service-entrance conductors to be sized
at an ampacity of not less than 83% of the service rating. Therefore, 200 amperes x
83% = 166 amperes; size 4/0 AWG THW aluminum conductors with an allowable
ampacity of 180 amperes should be selected for this dwelling.
If a 230 volts load is connected to 240 volts power source, what is the minimum voltage
that can be supplied to load as recommended by NEC? - ANS-228 volts
