STC-EIT260
Alternating current, general-use snap switches are UL-listed to control motors rated up to ____ horsepower.
(2) as marked on the switch. NEC 404.14(A)
Match the outlets with the type of protection required. 1. Bedroom receptacle outlet, 2.Bathroom receptacle outlet, 3. Garage receptacle outlet, 4. Kitchen lighting outlet, 5. Hallway lighting outlet, 6. Kitchen counter receptacle outlet, 7. Outside lighting outlet
(B AFCI), (A GFCI), (A GFCI), (C No protection required) (B AFCI) (A GFCI) and (C No protection required)
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. NEC 314.20
Specify the maximum overcurrent protection permitted for following the circuit conductor sizes: 14 AWG copper, 12 AWG copper, 10 AWG copper
15 amperes20 amperes30 amperes NEC 240.4(D)
An arc flash can produce temperatures of ____°F.
35,000
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)
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)
The ampacity of Type NM cable shall be in accordance with ____ conductor temperature rating
60°C (140°F) NEC 334.80
Lighting outlet boxes are designed for size ____________________ screws.
8-32
A continuous load shall not exceed ____ of the rating of the branch circuit
80%
The suffix "B" in Type NM-B nonmetallic cable means that the conductors have an insulation temperature rated ____.
90°C (194°F)
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)
The Code indicates the rooms in a dwelling that are required to have switched lighting outlets or switched receptacles. Write yes (switch required) or no (switch not required) for the following areas [see NEC 210.70(A)]:
Attic(Yes), stairway (yes), crawl space (where used for storage) (yes), hallway (yes), bathroom (yes), clothes closet (no) NEC 210.70(A)
Receptacles are not permitted to be mounted directly over ____________________ heaters in residential construction.
Baseboard NEC 210.52 Informational Note
Why were immersion detection circuit interrupters (IDCIs) and appliance leakage current interrupters (ALCIs) introduced in older homes?
Because older homes probably do not have GFCI receptacles in bathrooms, immersion detection circuit interrupters (IDCIs) and appliance leakage current interrupters (ALCIs) were introduced to provide people with shock protection. NEC 422.41 NEC 215.10 and 517.17
List six branch circuits in a dwelling that require AFCI protection.
Branch circuits in a dwelling that require AFCI protection include the family room, dining room, living room, parlor, library, den, bedroom, sun room, recreation room, closets, and hallways. NEC 210.12(A)
From how many locations does four-way switching allow a lighting outlet to be controlled?
Four-way switching allow a lighting outlet to be controlled from three or more locations.
Receptacles in unfinished basements must be ____________________ protected.
GFCI NEC 210.8(A)(5)
When Type NM cable is run through holes in metal framing members, ____________________ must be provided to protect the cable from sharp metal edges.
Grommets NEC 334.17
Receptacles have several screw terminals for the attachment of circuit conductors. Match the following screws with their intended conductor. Silver-colored screw, Brass-colored screw, Green hexagonal screw
Grounded (white) conductor, Hot (phase) conductor, Equipment grounding conductor
How is track lighting load in residences calculated?
It is considered to be part of the general lighting load of 3 volt-amperes per square foot. NEC 220.43(B)
The use of the word shall indicates a(n) ____________________ rule.
Mandatory NEC 90.5(A)
What is the difference between Type NM-B and Type NMC-B cable?
NM-B has a flame-retardant, moisture-resistant outer jacket. NMC-B has a flame-retardant, moisture-, fungus-, and corrosion-resistant outer jacket.
Explain what is meant by a nominal voltage rating
Nominal means typical or in name only. Circuits are rated at a nominal 120 volts. However, the actual operating voltage may be 110V, 115V, or 117V. NEC 100 Def.
What is the NEC definition of a qualified person?
One who has 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.
Match the following switch types with their drawing symbols "S"
Single-pole
____________________ provide additional information about a job that may not be found on the blueprints.
Specifications
Explain what must be done when cables are bundled together for more than 24 inches.
The heat generated by the bundled conductors cannot easily dissipate; therefore, they must be derated. NEC 310.15(B)(3)(a)
What are the two different types of ground-fault protection recognized by the Code?
The two types are ground-fault circuit-interrupter (GFCI) protection for personnel and ground-fault protection for equipment. NEC 590.6(A)(1)
Explain what flexible metallic and nonmetallic conduits are typically used for in residential construction.
These are used for connections to motorized appliances, such as food waste disposers, washers, and dryers that may be subject to vibration.
Match the following switch types with their drawing symbols "S3"
Three-way
The NEC specifies that 60°C ampacity be used for circuits rated 100 amperes or less, except when the equipment terminals are marked for use with higher temperature wire. What is one potential problem with using higher-temperature, higher-ampacity wire?
Using higher-ampacity wire rated 75°C or 90°C may sometimes result in the use of a smaller conductor size and subsequent excessive voltage drop. NEC 110.14(C)(1)
Describe at least three effects of voltage drop in residences.
Voltage drop causes lights to dim, TV pictures to "shrink," motors to run slower and hotter, electric heaters not to produce their rated output, and appliances not to work properly.
GFCI protection is required for which of the following?
a receptacle installed within 6 feet of a wet-bar sink 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 210.12(A)
The grounded (identified) conductor of 6 AWG or smaller must have an outer finish that is ____.
any of the following: white, gray or three continuous white NEC 200.6(A)
Under certain circumstances, the grounded (neutral) conductors of a residential service ____ permitted to be sized smaller than the phase conductors.
are
Unused knockouts in boxes, spaces for ____________________ in a panel, meter socket enclosures, and all other similar equipment must be effectively closed.
circuit breakers NEC 110.12(A) & 408.7
For a given conductor size, which material has the greatest ampacity
copper
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
The authority having jurisdiction over electrical construction is generally the ____________________.
electrical inspector
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
Nonmetallic-sheathed cable is manufactured with copper conductors ranging in size from ____________________ AWG to ____________________ AWG and with aluminum or copper-clad aluminum conductors ranging in size from ____________________ AWG to ____________________ AWG.
fourteen, two, twelve, two
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 200.7(A)
Listing or labeling of electrical equipment is done by a ____.
recognized testing laboratory
When a conductor that is carrying current breaks or when a loose connection occurs, it is a ____________________ arcing fault because the current is trying to travel in its intended path.
series
The conductors that run between a switched outlet and the switch controlling the outlet are called a(n) ____________________.
switch loop
A 4-way switch does not have "ON" and "OFF" markings. Four-way switches are connected to the ____________________ between two 3-way switches. One 3-way switch is fed by the ____________________; the other 3-way switch is connected to the load. "
travelers," source
