Unit 11: General Practice Flashcards
Reinforcing NEC® principles through problem-solving and application of electrical code requirements, calculations, and best practices for safe and code-compliant installations.
Fill in the blank:
Where used outdoors, aluminum or copper-clad aluminum grounding conductors shall NOT be installed or terminated within ________ of the earth.
18 inches
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A wall-mounted central vacuum assembly connected to a single receptacle located in an attached garage of a dwelling unit shall be provided with ________ protection.
GFCI
True or False:
Where a building or structure is supplied by more than one service, a permanent plaque shall be installed at each service disconnect.
TRUE
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Direct and alternating current differ in that alternating current ________.
reverses at intervals
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As a general rule and under normal operating conditions, regardless of the type of insulation, size 12 AWG copper conductors are permitted to be protected by an overcurrent protective device with a standard rating of NOT more than ________.
20 amperes
Fill in the blank:
For the purpose of service load calculations in dwelling units, each two (2) wire small appliance branch circuit shall be calculated at ________.
1,500 VA
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The disconnecting means for a permanently connected appliance, rated not over 300 VA or ________, is permitted to be the branch circuit overcurrent protective device where the switch or circuit breaker is within sight from the appliance or is lockable.
1/8 hp
Where a straight run of trade size 4 in. conduit containing size 2/0 AWG conductors enters and exits a pull-box and no terminations or splices are made, what is the MINIMUM required length of the pull-box?
32 inches
4 in. (conduit) x 8 = 32 inches
Fill in the blank:
Where the design and operation of a generator does not prevent overloading, the ampacity of the conductors from the generator terminals to the first overcurrent protection device shall NOT be less than ________ of the nameplate current rating of the generator.
115 percent
Fill in the blank:
All single-phase cord-and-pug connected room air conditioners shall be provided with ________.
factory-installed AFCI, HCDI, or LCDI protection
Fill in the blank:
The NEC® requires an equipment bonding jumper to be ________.
continuous
Fill in the blank:
For Type MI cable with an outer sheath made of steel, a separate ________ shall be provided.
equipment grounding conductor
Fill in the blank:
Luminaires shall be installed or constructed so that adjacent combustible materials will not be subject to temperatures in excess of ________.
130°F
Fill in the blank:
Luminaires containing a metal halide lamp (other than a thick-glass PAR lamp) shall be provided with a containment barrier that encloses the lamp, or shall be provided with a physical means that only allow the use of a ________.
lamp that is Type O
Fill in the blank:
Unless GFCI protection is provided, luminaires and ceiling fans located over or within 5 ft. horizontally from the inside walls of an indoor installed spa or hot tub shall have a mounting height of NOT less than ________ above the maximum water level of the spa or hot tub.
12 feet
Fill in the blank:
The NEC® approves ________ for use under the accessible raised floor area of an information technology equipment room.
- Type AC cable
- rigid nonmetallic conduit
- Type MC cable
Fill in the blank:
The ampacity adjustment factors for conductors addressed in Section 310.15(C)(1) of the NEC® are not required to be applied when the conductors are installed in a metal wireway unless, the number of current-carrying conductors within the wireway exceeds ________ at any cross section of the wireway.
30
Fill in the blank:
The voltage at the line terminals of a fire pump motor controller shall NOT drop more than ________ below the controller’s nominal rated voltage under motor-starting conditions. This limitation shall not apply for emergency run mechanical starting.
15 percent
Fill in the blank:
Where a size 1/0 AWG THWN aluminum conductor is installed outdoors in a raceway with two (2) other current-carrying conductors of the same size and the ambient temperature reaches 110°F, the conductor has an ampacity of ________.
98 amperes
1/0 AWG AL ampacity before correcting = 120 amperes
120 amperes x .82 (temperature correction factor) = 98.4 amperes
Fill in the blank:
Ceiling suspended (paddle) fans weighing MORE than ________ shall be supported independently of the outlet box.
70 pounds
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Inverse-time circuit breakers rated at ________ or less and 1000 volts or less shall have the ampere rating molded, stamped, etched or similarly marked into their handles or escutcheon areas.
100 amperes
Fill in the blank:
Where the service of a building is provided with ground-fault protection, the MAXIMUM trip time delay shall be ________ for ground-fault currents equal to or greater than 3,000 amperes.
One second
Fill in the blank:
Conductor ampacity adjustment factors shall not apply to conductors in raceways having a length NOT exceeding ________.
24 inches
Fill in the blank:
The connection between the grounded circuit conductor and the equipment grounding conductor, or the supply-side bonding jumper, or both, at the electrical service of a building or structure is recognized as the ________ in the NEC®.
main bonding jumper
