STC EIT260 Final Reveiw
Wall receptacles in a habitable room must be placed so they are no further than ____ feet from any point along the wall.
6 ft NEC 210.52(A)(1)
The ampacity of Type NM cable shall be in accordance with ____ conductor temperature rating.
60°C (140°F) NEC 334.80
A continuous load shall not exceed ____ of the rating of the branch circuit.
80%
Cord-and-plug-connected appliances shall not exceed ____ percent of the branch-circuit rating.
80% NEC 210.23(A)(1)
Name several factors that must be taken into account when sizing boxes per the NEC.
Factors include devices installed, circuit wires, hickeys and studs, clamps, and equipment grounding conductors NEC 314.16.
The NEC requires that switching be done only in ____ conductors.
ungrounded NEC 404.2(A)
Devices are equipment whose primary function is to carry current, not ____.
utilize electric energy Article 100 Def.
Calculate the overcurrent protection needed for a countertop cooking unit rated 7,450 watts, 120/240 volts. Use nameplate rating per Table 220.55, Note 4. I = W/E = 7,450/240 = 31.04 amperes
Use a 40-ampere, two-pole circuit-breaker
When using individual conductors in raceway, all of the following colors of insulation are permitted for the grounded conductor (neutral), except for ____.
green with three white stripes NEC 200.6 NEC 200.7
The receptacle for a kitchen refrigerator is permitted to be supplied by a(n) ____________________ branch circuit.
individual 15-ampere or 20-ampere NEC 210.52(B)(1) Exception 1
Kitchen lighting ____ permitted to be supplied by the two 20-ampere small-appliance circuits required for the kitchen and dining room area.
is not NEC 210.52(B)(2)
NEC 422.60(A) requires that an appliance nameplate show ____.
the appliance rating in volts and amperes and the appliance connected load in volts and watts NEC 422.60(A)
The NEC recommends a voltage drop no greater than ____________________ percent for feeders and no greater than ____________________ percent total for feeders and branch circuits together.
three, five NEC 210.19(A)(1) info note 4
The smallest wire size for which overcurrent protection is specified in the Code is ____.
14 AWG NEC 210.24, Table 210.24, and 240.4(D)(3)
In Table 220.55, what is the rationale for allowing demand factors for electric ranges but not for wall-mounted ovens or individual counter-mounted cooking units?
It is assumed that all heating elements in a range will rarely be used at the same time; an oven, by contrast, is either on or off.
Calculate the minimum number of 15-ampere lighting branch circuits required in a residence of 1,850 square feet.
NEC 220
Explain why a post lamp cannot be grounded only with a local ground rod, but must have a separate grounding equipment conductor going back to the residential service.
NEC 250.4(A)(5) states the earth shall not be considered as an effective ground-fault current path. NEC 250.4(A)(5)
What is the NEC definition of a "Qualified Person"?
One who has the skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved. NEC 100 Def "Qualified Person"
The use of the word shall indicates a(n) ____________________ rule.
mandatory NEC 90.5
A 125-volt, 15- and 20-ampere receptacle installed to serve a kitchen countertop is required ____.
to be supplied by at least two 20-ampere small appliance circuits and to have GFCI protection for personnel NEC 210.8(A)(6) and NEC 210.52(B)(3)
Where noncombustible surface material is used on walls or ceilings, outlet boxes must be mounted so that they will be set back not more than ____ from the face of the surface material.
1/4 in. (6 mm) NEC 314.20
In walls or ceilings constructed of noncombustible material, such as concrete or tile, the edge of the outlet box is permitted to be set back not more than ____________________ from the finished surface.
1/4 in. NEC 314.20
The minimum depth for a 120-volt, 15-ampere, GFCI-protected circuit to an outdoor pole light run under a paved driveway is
12 in. NEC 300.5 and Table 300.5
Article ____, Part VI, covers equipment grounding and equipment grounding conductors.
250
NEC ____________________ requires that the branch circuit overcurrent protection shall not exceed the rating marked on the appliance.
422.11(A) NEC 422.11(A)
The total rating of utilization equipment fastened in place, other than luminaires (lighting fixtures), shall not exceed ____ percent of the branch-circuit ampere rating, where lighting units, cord and plug connected utilization equipment not fastened in place, or both, are also supplied.
50 NEC 210.23(A)(2)
When is a re-identified white conductor is not permitted to be used?
A re-identified white conductor is not permitted to be used if the return conductor from the switch to the switched outlet. NEC 200.7(C)(1)
NEC 406.3(D)(2) permits existing two-wire, non-grounded-type receptacles to be replaced with a ____ where no equipment grounding conductor exists.
All the three NEC 406.4(D)(2)(a)(b)(c)
How is an outlet defined by the NEC?
An outlet is a point on a wiring system where current is taken to supply utilization equipment Article 100 Def.
Article 210 applies to branch circuits, but branch-circuit calculations are covered in ____.
Article 220
According to ____, unused knockouts and other openings in electrical boxes and cabinets are required to be closed.
Circuit breakers NEC 110.12(A) and NEC 408.7
Metallic conduit buried underground must be protected against ____.
Corrosion NEC 300.6(A)(3)
According to ____, unused knockouts and other openings in electrical boxes and cabinets are required to be closed.
NEC 110.12(A) and NEC 408.7
A dual-element fuse sized at approximately 125% of the full-load current rating of the motor adds extra overcurrent protection to the overload protection built into a food-waste disposer.
TRUE
Describe what NEC 250.148 requires to maintain the continuity of the equipment grounding path.
When more than one equipment grounding conductor enters a box, they shall be spliced so that the continuity of the grounding path is not interrupted if the receptacle or other wiring device is removed. NEC 250.148
GFCI protection is not required for ____.
a built-in dishwasher NEC 210.8
All of the following are acceptable disconnecting means for appliances, except for ____.
a horsepower-rated switch NEC 422.31, NEC 422.33 and NEC 422.34
The meaning of approved is ____.
acceptable to the authority having jurisdiction NEC 100 Def.
To avoid inductive heating in metallic raceways, the NEC requires that ____.
all circuit conductors be run in the same raceway NEC 300.3(B)
Under certain circumstances, the grounded (neutral) conductors of a residential service ____ permitted to be sized smaller than the phase conductors.
are NEC 215.2(A)(2) and NEC 230.42(C)
Outdoor lighting fixtures and associated equipment ____ permitted to be supported by trees.
are NEC 410.36(G)
Phase conductors 6 AWG and smaller ____ permitted to be re-identified as equipment ground conductors using green paint, tape, or other effective means
are not NEC 210.5(B), NEC 250.119 and NEC 310.110(B)
The NEC requires that a(n) ____ be installed at each conductor splice connection point.
box or conduit body NEC 300.15
Branch circuit conductors shall have an ampacity ____ the maximum to be served.
not less than NEC 210.19(A)(1)
According to NEC 210.52(G), at least ____ receptacle(s) must be installed in an attached residential garage.
one NEC 210.52(G)
The rating of a branch circuit is determined by its ____.
overcurrent protective device (fuse or circuit-breaker) NEC 210.3
As defined in Article 100, a dwelling unit has the following feature(s): ____.
permanent provisions for living, sleeping, cooking, and sanitation NEC 100 Def.
The National Electrical Code is a minimum ____ standard.
safety NEC 90.5
The NEC requires that conductors 8 AWG and larger must be ____ when installed in a raceway.
stranded NEC 310.106(C)
All 125-volt, 15- and 20-ampere receptacles in a dwelling are required to be ____.
tamper resistant NEC 406.12
Any receptacle installed to serve countertop surfaces and located within ____________________ of a wet bar sink must be GFCI protected.
6 ft NEC 210.8(A)(7)
A duplex grounding-type receptacle is usually installed in an accessible location under the sink for plugging in the dishwasher and food waste disposer, and it does not have to be ____ protected.
GFCI NEC 210.8(A)(6)
What is the purpose of the National Electrical Code?
The purpose is the practical safeguarding of persons and property from hazards arising from the use of electricity. NEC 090.001(A)
Name the kitchen receptacles that are not required to be protected by ground-fault circuit-interrupters.
The receptacles include those located behind a refrigerator, serving a gas range, or under a sink serving a food waste disposer. NEC 210.8(A)(6) requires receptacles installed to serve countertop surfaces must have ground-fault circuit-interrupter protection. NEC 210.8(A)(6)
AFCI protection must be provided for ____________________ branch circuits supplying outlets installed in dwelling unit bedrooms.
all 120-volt, single phase, 15- and 20-ampere NEC 210.12A
The 20-ampere appliance circuits required by NEC are permitted to serve no other loads, except for ____.
clock outlets and receptacles that are installed to plug in the cords of gas-fired ranges, ovens, or counter-mounted cooking units NEC 210.52(B)(2) Exception 1 and 2
Table 310.15(B)(2)(a) gives allowable ampacities of copper conductors with various types of insulation. When conductors will be used in ambient temperatures exceeding 30°C (86°F), the ____ for the table must be applied.
correction factors NEC 310.15(B)(2)
All of the following are included when calculating the usable area of a dwelling to compute the required lighting load, except for ____.
crawl space NEC 220.12
In order that the connections inside an outlet box remain accessible, the NEC requires that a surface extension from an outlet box cover be made using ____.
flexible conduit NEC 314.22 Exception
Because of the dangers associated with the open neutral (grounded conductor), NEC 300.13(B) does not permit the continuity of the ____ conductor to depend on a receptacle.
grounded (neutral) NEC 300.13(B)
NEC Article 210 provides ____ guidelines for locating receptacle outlets in residences.
mandatory
