Journeyman Final Flashcards
There are six conductors in a raceway connected to 75°C rated breakers.Each wire has a 70amp load using THHN conductors.The minimum size conductors used as are #____AWG
A.4
B.6
C.8
D.10
A.4
Thermal insulation shall not be installed within \_\_\_\_inches of recessed fixtures. A.1/2 B.3/4 C 2 D.3
D.3
A 1-inch conduit contains three 3-wire circuits.All conductors are #10 TW.Each circuit consists of two phase conductors,one grounded conductor,and one equipment grounding conductor.The maximum capacity of each phase conductor is \_\_\_amperes. A.24 B.28 C.30 D 35
A.24. (80%)
The volt/ampere rating of s device that consumes 14.5 amperes on a 230 volt circuit is _____watts.
A.3335
B.244.5
C.15.85
D.14.5
A.3335. (14.5 x 230)
Type____cable is not permitted for service entrance.
A.MI
B.MC
C.SE
D.UF
D.UF
Direct burial cables emerging from the ground and subject to physical damage shall be installed in\_\_\_\_\_. A.rigid metal conduit B.electrical metallic tubing C.surface metal raceway D. flexible liquidtight metal conduit
A.rigid metal conduit
A high Impedance grounded systems are limited to systems operating_____volts or above.
A.120
B.240
C.277
D 480
D.480
A junction box for the 120 volt wet-niche fixture shall be at least _____ inches above the ground.
A.0
B.2
C 4
D 8
C.4
A 15 or 20 amp receptacle shall be located within \_\_\_\_\_feet of a roof top air conditioner. A.25 B.35 C.75 D.100
A.25
The minimum as service for a one family-dwelling shall be ____amps.
A.60
B.100
C.125
D.150
B.100
Type ‘S’ adapters are installed in Edison base fuse holders_____.
A for convenience of the owner
B.to limit the size of the fuse to be installed
C.to increase the speed of removing,once it has blown
D.to prevent shocks when installing pennies or other substitutes.
B.to limit the size of the fuse to be installed
A laundry branch circuit shall be rated at \_\_\_\_amps. A.15 B.20 C.25 D.30
B.20
The voltage rating of communications cables shall not be less than ____volts
A.50
B.150
C.300
D.600
C.300
The direction of rotation of the rotor for three -phase motors can be reversed by inter changing any___leads
A.2
B.3
C 4
D.6
A.2
A \_\_\_\_receptacle may be included on the small appliance circuit. A.water pump B.electric clock C smoke detector D.garage door opener
B.electric clock
A light fixture that weighs more than \_\_\_\_pounds shall be supported independently of the fixture box. A.15 B.25 C 30 D.50
D.50
Disconnecting means shall be provided on the supply side of all cartridge fuses of any voltage where ____.
A it is connected in series
B.accessible to other than qualified persons
C. there is a possibility of area being a wet location
D the fuse is of an older type that cannot be determined
B.accessible to other than qualified persons
Furnaces shall be supplied by a(n) \_\_\_\_branch circuit. A.class I B.individual C. General use D.small appliance
B.individual
A screw connecting the neutral bar of a grounded system to the service equipment enclosure is called the \_\_\_\_ A. Main bonding jumper B system neutral connector C equipment bonding jumper D. Equipment grounding connector
A.main bonding jumper
Round boxes shall not be used where conduits or connectors fasten the \_\_\_ of the box. A. Hub B.side C back D.fittings
B.side
In a house, a garbage disposal may be installed with a cord and attachment plug if the cord is ____.
Grounded
Direct burial cables rated above ____volts shall be shielded.
A.600
B 1000
C.2000
D.3000
C.2000
When two ground rods are installed, they shall be separated by a minimum of\_\_\_\_ft. A.6 B.8 C.10 D.12
A.6
The minimum vertical clearance for service drop conductors above pedestrian sidewalk is\_\_\_\_ft. A.8 B 10 C.12 D. 15
B.10
The inspection authority shall be notified not less than\_\_\_hours before an inspection is needed. A.8 B.16 C.24 D.32
C.24
Fixed lighting units may be on a 30 amp branch circuit if they are\_\_\_\_duty lamp holders. A. Light B. Medium C. Heavy D Extra heavy
C.heavy
Boxes installed in the floor shall be\_\_\_\_. A. Brass B. Metal C. Plastic D. Listed for the installation
D. Listed for the installation
A receptacle for laundry equipment shall be located within\_\_\_feet of the intended location. A.3 B.4 C.6 D.8
C.6
Type\_\_\_\_insulated conductors may be used in direct burial applications A.THW B.THWN C.THHN D.USE
D.USE
Edison-base type fuses shall not exceed___amps.
A.15
B.20
C.30
D.60
C.30
The maximum distance between supports for a 1" rigid nonmetallic conduit is\_\_\_\_ft. A.2 B.3 C.4 D.5
B.3
The smallest size conductor permitted for a ground ring is #\_\_\_\_ copper. A.4 B.2 C.1/0 D.2/0
B.2
A single non- motor operated appliance of 13.4 ramps shall have over current protection not to exceed\_\_\_percent of appliance rating. A.100 B.125 C.150 D.200
C.150
Metal light poles must have an accessible hand hole not less than\_\_\_\_\_. A. 2 x 4 B. 4 x 6 C. 6 x 8 D. 8 x 10
A. 2 x 4
An AC general use snap switch used to control a motor load shall not exceed\_\_\_\_% of the ampere rating of the switch at its rated voltage. A.50 B. 70 C. 80 D. 100
C.80
MI cable shall be secured within\_\_\_inches of a panel. A.30 B.36 C.48 D.72
D.72
Auxiliary gutters shall not contain more than\_\_\_\_current carrying conductors, without derating. A.30 B.50 C.70 D.90
A.30
The minimum dimensions for a concrete- encased steel reinforcing bar electrode is\_\_\_\_feet in length and\_\_\_\_in diameter. A.8 feet 5/8 inches B.10 feet 1/2 inches C.20 feet 1/2 inches D.20 feet 2 inches
C.20 feet, 1/2 inch
Conductor fill of a conduit nipple 24" or less in length shall not exceed \_\_\_% of its total cross- sectional area. A.40 B.55 C.60 D.65
C.60
In a nonmetallic box not larger than 2.25 x 4in, cable clamps are not needed if the NM cable is stapled within \_\_\_inches of the box. A.6 B.8 C.10 D.12
B.8
Branch circuits larger than\_\_\_\_amps shall supply only nonlighting loads. A.20 B.30 C.40 D.50
D.50
The code requires \_\_\_\_\_ cubic inches of free space for each #10 wire in an outlet box. A.2 B.2.25 C.2.5 D.3
C.2.5
The minimum size conductor that may be installed in parallel is\_\_\_\_awg. A.#1 B.#2 C.#1/0 D.#2/0
C.#1/0
The maximum number of switches permitted to disconnect a service is \_\_\_\_. A.1 B.4 C.6 D.10
C.6
The ampacity of NM cables is based on the \_\_\_\_ °C column of the table 310.16. A.60 B.75 C.85 D.90
A.60
Short sections of ferrous metal raceway used for physical protection of the grounding electrode conductor shall be bonded at both ends to the \_\_\_\_. A. Ground bar B. Bonding screw C grounding electrode conductor D.main bonding jumper
C.grounding electrode conductor
A feeder in a single family dwelling supplies a load made up of 75 amps of electric space heating and 25 amps of air conditioning.The required capacity of the feeder is \_\_\_amperes. A.25 B.50 C.75 D.100
C.75
Work installed by an electrical contractor can be concealed after ____.
A.applying for the permit
B.requesting
C.obtaining inspection approval
D. a permit has been secured
C.obtaining inspection approval
The \_\_\_\_ exterior door of a dwelling unit is not required to be illuminated. A.back B.front C. Garage vehicle D.garage personnel
C.garage vehicle
Where raceways are installed in wet locations above grade,the interior of these raceways shall be considered a \_\_\_\_ location. A. Wet B.dry C. Damp D. Corrosive
A.wet
The minimum number of small appliance branch circuits required in a dwelling unit is\_\_\_\_. A.2 B.3 C.4 D.5
A.2
Where a conduit is used for physical protection for a cable, ____ is required.
A. Conduit
B. A fitting on the end of the conduit
C. A box to change from conduit to cable
D. A staple to protect the cable from abrasion
B. A fitting on the end of the conduit
The size of the main bonding jumper for one 800 kcmil aluminum conductor,per phase,with an aluminum main bonding jumper is \_\_\_\_. A 3/0 awg B. 4/0 awg C. 250 kcmil D.500 kcmil
A.3/0 awg
What is the minimum size wire for a feeder to a mobile home,rated at 100 amps? A.#1awg B.#2awg C. #3awg D.#4awg
D.#4awg
Grounding electrode conductors, size \_\_\_awg,must always be protected from physical damage by an enclosure. A.4 B.6 C.8 D.10
C.8
A main bonding jumper shall be used to connect the equipment grounding conductor(s) and the service- disconnect enclosure to the grounded conductor of the system within the enclosure for each service disconnect and shall be
A.No.6awg copper
B.Sized accordingly with table 430-148
C.unspliced
D. Parallel only when NO. 1 AWG or larger
C. Unspliced
Power sources other than transformers for class 1 limited circuits shall be protected by overcurrent devices rated at not more than\_\_\_\_of the volt- ampere rating of the source divided by the rated voltage . A.80% B.167% C 175% D.250%
B.167%
Outlet boxes or fittings installed as required by section 370.23 shall be permitted to support fixtures weighing\_\_\_. A.35lb or less B.35lb or more C.50lb or more D.50lb or less
D.50lb or less
At least one wall switch controlled lighting outlet shall be installed in/ at A.Balcony level exits and entrances B. All doors or garages C. Attached and detached garages D. Hallways
D. Hallways
Where a feeder supplies continuous and non- continuous loads, the rating of the over- current device shall not be less than the non- continuous load plus\_\_\_\_% of the continuous load. A.125% B.100% C.80% D.50%
A.125%
Ventilating pipes for motors, generators, or other rotating electric machinery, or for enclosures for electric equipment, shall be of a metal not less than \_\_\_\_. A.0.010 B.0.021 C.0.025 D.0.033
B.0.021 in
For the servicing of heating and air conditioning equipment on rooftops, the 125 volt single phase receptacle shall be located on the same level and within\_\_\_\_ft. A.5 B.10 C.20 D.25
D.25
For a one- family dwelling at least one receptacle shall be installed on\_\_\_\_of the dwelling. A. Each side B. Front side C. Front and back sides D. Back side
C. Front and back sides
For a permanently installed pool, no lighting fixtures shall be installed for operation on supply circuits over \_\_\_volts between conductors. A.150 B.120 C.60 D.50
A.150
Dielectric heating is the heating of a nominally conductive material due to its own power losses when the material is placed in a varying electromagnetic field
A.true
B.false
B.false
Grounding conductors smaller than No.\_\_\_\_ shall be in rigid metal conduit,IMC, rigid nonmetallic conduit,EMT, or cable armor A.6 B.8 C.4 D.2
A.6
Lighting fixtures mounted on walls shall be installed with the top of the fixture lens at least\_\_\_\_below the normal water level of the pool. A.4" B.8" C.12" D.18"
D.18
Circuit breaker enclosures shall be permitted to be installed\_\_\_\_where the circuit breaker is installed in accordance with section 240.81 A. Vertically B. However it fits C. Horizontally D. Laterally
C. Horizontally
Where the circuitry is interlocked so as to prevent simultaneous operation of motor compressors and all other loads connected, the conductor size shall be 100% the sum of all loads together.
True or false
B.false
The screw used to connect the panel to the neutral bar is called the A. Equipment bonding jumper B. Grounding electrode conductor C. Main bonding jumper D. Grounded conductor
C. Main bonding jumper
Electrically operated kitchen waste disposals shall be permitted to be cord- and plug connected under which conditions A. Terminated with a grounding type plug B. Not over 48" in length C. Twist-lock and grounding type D.GFCI PROTECTED
A. Terminated with a grounding type plug
Solid dielectric insulated conductors operated above 2000 volts in permanent installations shall have
A. Physical protection with rigid metal conduit
B.3 foot clearance from windows
C. Ozone- resistant insulation
D. Supplemental ground
C. Ozone-resistant insulation
If the branch circuit supplies a single non- motor operated appliance, the rating of the over- current protection shall be…
A. Not greater than 80%the full load
B. Not exceed 150%when rated 13.3 amps or less
C. Not exceed 150%when rated over 13.3 amps
D. Be no greater than 50 amps
C. Not exceed 150%when rated over 13.3 amps
Where used for overload protection,a fuse shall be inserted
A. In series with the contactor coil
B. In series with each ungrounded conductor
C. Only when there is a risk of injury
D. In parallel with each ungrounded conductor
B. In series with each ungrounded conductor
Direct burial cable and conductors emerging from ground shall be installed in____when subject to physical damage.
A. Rigid metal conduit
B.2” concrete
C. Metal raceway no more than 24”below grade
D. Nonmetallic tubing
A. rigid metal conduit
Central heating equipment other than fixed electric space heating equipment shall be supplied by a\_\_\_\_/. A. Dedicated circuit B. Approved source C. Individual circuit D. Llocked panel
C. Individual circuit
Conductors size No.\_\_\_and larger shall be permitted to be connected in parallel A.2 B.1/0 C.2/0 D.4/0
B.1/0
The number of conductors permitted in a sheet metal auxiliary gutter shall be A. No more than 30 current carrying B. Less than 40%the cross sectional Area C. No more than 40%the cross sectional D.both A & B
A. No more than 30 current carrying conductors
Mobile home service equipment shall be rated at not less than\_\_\_. A.60amps B.100 amps C.125amps D.150 amps
B.100 amps
A receptacle that provides power for a water pump shall be permitted between\_\_\_\_ft and\_\_\_ft from the inside walls of the pool or foundation. A.10,20 B.10,15 C.5,10 D.5,20
C.5,10
150 amp mobile home feeder conductors will be No.\_\_\_awg aluminum A.2 B.1 C.1/0 D.2/0
D.2/0
What is the minimum volume allowance needed for 2-12/3 romex cables with clamps and a receptacle? A.20.25 B.19.00 C.22.00 D.21.50
A.20.25
Electrical rough installation may be covered when___?
A. After calling for inspection
B.24 hours after calling for inspection
C. After recieving an approved inspection
D. After the inspector has walked through the building
C. After recieving an approved inspection
A form of general- use snap switch is suitable for on an AC circuit for controlling a motor load only if
A. Motor does not exceed 125%of switch rating
B switch is rated not less than 125% of motor load
C. Switch is located in readily accessible area
D motor load is 20 amps or less
B.
1 1/2 rigid metal conduit shall be supported every\_\_\_ A.3 feet B.4 feet C.5 feet D.10 feet
C.5 feet
Where pool bonding is a concern, which of the following shall be bonded?
A.GFCI receptacle 15’ from inside wall of pool
B. All parts of pool structure
C. Any fixed metal part 12’or higher above pool
D. Any metal fencing within 5’ of pool interiors
D. Any metal fencing within 5’ of pool interior
Because of the quality of wire today it is permissible to use No.6 stranded wire for pool bonding
True or False
A.false
Non- metallic boxes shall be permitted when using A.EMT B.Rigid metal conduit C. Concealed knob-tube wiring D. All of the above
C. Concealed knob and tube wiring
In kitchens and dining rooms of dwellings receptacle outlets shall be installed___
A. No greater than 24” apart
B. Wall counter spaces 12 inches or wider
C. No closer than 36” to sink edge
D. Both A & B
B. Wall counter spaces 12”or wider
E1ach electrode from separate grounding systems shall be
A. Not less than 6 feet apart
B. Readily identifiable
C bonded together when less than 6 feet apart
D. Located on separate properties
A. Not less than 6 feet
A lighting circuit rated at\_\_\_\_shall be required to have heavy- duty lamp holders A.over 50 amps B.40-50 amps C.30 amps D.all of the above
C.30 amps
A junction box connected to a conduit that extends directly to a forming shell or mounting bracket of a niche fixture shall
A. Be no less than a 4 by 4inch box
B. Have a minimum capacity of 21 cubic inches
C. Not contain any splices or taps
D. Be no less than 4 inches above ground level
D. Be no less than 4 inches above ground level
The approximate diameter of type PFA wire size 14awg is A. .111in B..163 in C. .113in D. .132in
C. .113in
Boxes used for receptacles located in the floor shall be listed specifically for this appliance
True or false
True
Round access openings in manholes shall not be less than\_\_\_inches diameter A.24 B 26 C.30 D 36
B.26
Conductors of type NMC shall be A. Rated at 60 degrees C B. Be sizes No.12 through 2/0 C. Be sizes No.14 through No. 8 D. Rated at 90 degrees C
D. Be rated at 90 degrees C
Branch circuit conductors that supply a single motor used in a continuous duty application shall have an ampacity of not less than A.125% FLA B.125$ nameplate rating C.100% of motor voltage rating D.80% of 125% of FLA
A.125% FLA
What size non- time- delay fuse is to be used with a 20hp,460volt,3 phase design E motor A.35 amps B.60 amps C.80 Amps D.100 amps
C.80 amps
Where the rating specified in table 430.152 is not sufficient for the starting current of the motor, the rating of an inverse time circuit breaker may increase but not exceed 400%for loads of 100 amps or less
True or False
True
Termination provisions of equipment for circuits rated 100 amps or less shall
A. Have conductors rated at 60 degrees C
B. Have conductor insulation rated at 75 °C
C. Have conductors rated at 140 °F
D. Both A& C
E. Both A& B
D. Both A& C
A recessed fixture that is not identified for contact with insulation shall have all recessed parts spaced at least\_\_\_from combustible material A.1/2 inch B.1 inch C.2 inch D.3 inch
A.1/2inch
Receptacle outlets installed in recreational vehicles shall be installed no greater than\_\_\_\_ft apart. A.2 B.4 C.6 D 12
D .12 feet
Heating and air conditioning circuits located on elevator cars shall not have a voltage rating in excess of\_\_\_ A.240 volts B.120 C.600 D.300
C.600
A solenoid is a device that consists of____
A. An armature and a winding
B.a coil and a plunger
C.a coil and two or more sets of contracts
D. Many movable Parts
B.a coil and a plunger
Electrically heated smoothing irons shall be equipped with an identified temperature limiting means
A. True
B. False
A.true
Ampacity ratings for type NM cable shall be that of \_\_\_\_conductors and shall comply with section 310.1t A.35°C B.60°C C.75°C D.90°C
B.60°C
Conduit for wet niche fixtures shall be constructed of \_\_\_ A. Steel B. Iron C. Brass D. Aluminum E. None of the above
C. Brass
Thermal insulation shall not be installed above a recessed fixture or within 3" of the fixtures\_\_\_. A. Enclosure B. Ballast C. Wiring compartment D. All of the above
D. All of the above
Which of the following are approved means of support for fixtures A. Outlet boxes B. Metal poles C. Trees D.A& B E.A,B&C
E. A,B,and C
High impedance grounded neutral systems shall be permitted in 3- phase systems of A.120 volts or higher B.120-600 volts C.480-1000 volts D. Over 600 volts
C.480-1000 volts
Any transition conduit, tubing, or cabling to open wiring or concealed knob& tube wiring requires
A.a box with separately bushed holes for each conductor
B. Fitting with no tape or splices
C.both A& B
D. None of the above
C. Both A& B
Plug fuses of these Edison- base type shall be classified no more than 125 volts and\_\_\_\_. A.15 amps B. 20 amps C.25 amps D.30 amps
D.30 amps
With the largest service entrance conductor being the equivalent of 800 kcmils, what size grounding electrode conductor is required? A.No.6 awg B.No.2 awg C.2/0 awg D.3/0 awg
C.2/0 awg
Conduits in parallel each containing 500kcmil conductor need what size over- current protection? A.100 amp B.800 amp C.600 amp D 500 amp
B.800 amp
Metal enclosures or raceways used to protect the grounding electrode conductor shall be \_\_\_ A. Bonded at both ends B. Bonded at the electrode end C. Bonded at the enclosure D. Of the non conductive type
A. Bonded at both ends
Which uses are not permitted for type UF cable? A. Underground and direct burial B. Wet conditions C. As feeder cables D. For service
D. For service
Overhead conductors exceeding 300 volts to ground installed over driveways shall have a minimum clearance of \_\_\_\_ft A.18 B.15 C.12 D.10
B.15
AC systems of 50 volts to 1000 volts that supply premises wiring shall be grounded if ____.
A. Used exclusively for control circuits
B. Circuits are for use of cranes
C.3 phase,4 wire,wye connected with neutral
D. Installed underground or direct burial
C.3 phase,4 wire,wye connected with neutral
A concrete encased electrode may be considered if consisting of at least 20 feet or rebar not less than 1/2 inch diameter.
A.true
B.false
A.true
Type MI cables shall be supported at intervals not exceeding\_\_\_\_ft. A.4 B.2 C.8 D 6
D.6 feet
Type S fuse of an ampere classification shall be interchangeable with a fuse with a lesser amperage classification
A.true
B.false
B. False
Securing of type NM cable to box shall not be required when secured within\_\_\_\_of the box. A.12 in B.8 in C.6 in D.3 in
B.8 inches
A load of not less than\_\_\_volt-amperes shall be included for each 2- wire laundry circuit. A.550 B.1000 C.1500 D.2000
C.1500
A ground ring shall consist of at least 20 feet of bare copper conductor not smaller than No.\_\_\_\_. A.2awg B.4awg C.6awg D.8 awg
A.2awg
For a 230 volt,3 phase,20 hp motor, what is the min size conductor to be used? A.2 awg B.4awg C.6awg D.8awg
C.6awg
At least one general purpose receptacle will be installed not less than\_\_\_\_ft from and not more than 20 ft from the inside wall of the pool. A.3 B.5 C.10 D.15
C.10
At least 6 inches of free conductor measured from the point where____.
A. It emerges from the box
B. It emerges from the raceway
C. It passes the opposite side of the box
D. Where it leaves the receptacle
B. It emerges from the raceway
Methods approved for connection of grounding conductors and bonding jumpers are\_\_\_\_ A. Exothermic welding B. Self tapping screws C. Solder type fittings D. None of the above
A. Exothermic welding
Isolating switches shall be accessible to\_\_\_persons only A. Approved B. Maintenance C. Qualified D. Service
C. Qualified
