Test: Chapter 1
__________ enclosures are constructed so that dust will not enter under specific test conditions
Dusttight
An overload is the same as a short circuit or ground fault. True or False?
False
A "structure" is that which is built or constructed, other that equipment. True or False
True
As used in the NEC, equipment includes ____________.
all of these - fittings - appliances - machinery
"Bonded" is defined as ____________ to establish electrical continuity and conductivity.
connected
A ____________ location may be temporarily subject to dampness and wetness.
dry
Conductors normally used to carry current shall be ____________ unless otherwise provided in this Code.
of copper or aluminum
The highest current at rated voltage that a device is identified to interrupt under standard test conditions is the "__________."
withstand rating
A single receptacle is a single contact device with no other contact device on the same ____________.
yoke
Connection by means of wire-binding screws, studs, and nuts having upturned lugs or the equivalent shall be permitted for ____________ AWG or smaller conductors.
10
________________ equipment excludes dust and doesn't permit arcs, sparks, or heat inside the enclosure to cause ignition of accumulations or atmospheric suspensions of a specified dust on or in the vicinity outside of the enclosure.
Dust-Ignitionproof
" ____________ " is a term indicating that there is an intentional delay in the tripping actions of the circuit breaker, which decreases as the magnitude of the current increases.
Inverse time
NFPA 70E - Standard for Electrical Safety in the Workplace, provides information to help determine the electrical safety training requirements expected of a qualified person. True or False
True
An opening in an outlet box where one or more receptacles have been installed is called "_______________."
a receptacle outlet
Communications equipment includes equipment and conductors used for the transmission of ____________.
any of these - audio - video - data
A reliable conductor that ensures electrical conductivity between metal parts of the electrical installation that are required to be electrically connected is called a(n) "____________."
bonding conductor or jumper
The temperature rating associated with the ampacity of ____________ shall be selected and coordinated so as not to exceed the lowest temperature rating of any connected termination, conductor, or device
conductor
A ____________ location is protected from weather and not subject to saturation with water or other liquids.
damp
Equipment enclosed in a case that is capable of withstanding an explosion of a specified gas or vapor that may occur within it, and of preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperature that a surrounding flammable atmosphere will not be ignited thereby defines the phrase "____________."
explosionproof equipment
A "______________" is a building or portion of a building in which one or more self-propelled vehicles can be kept for use, sale, storage, rental, repair, exhibition, or demonstration purposes.
garage
A device intended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when the current to ground exceeds the values established for a Class A device, is a(n) "_____________."
ground-fault circuit interrupter
A branch circuit that supplies only one utilization equipment is a(n) ____________ branch circuit.
individual
Equipment or materials inclduded in a list published by a testing laboratory acceptable to the authority having jurisdiction are said to be "___________."
listed
A nominal value assigned to a circuit or system for the purpose of conveniently designating its voltage class, such as 120/240V, is called "_______________ voltage."
nominal
The NEC defines a(n) "__________" as 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.
qualified person
A contact device installed at an outlet for the connection of an attachment plug, or for the direct connection of electrical utilization equipment designed to mate with the corresponding contact device, is known as a(n) "____________."
receptacle
The conductors and equipment from the electric utility that deliver electric energy to the wiring system of the premises served is called a "_____________."
service
The "__________" is the point of connection between the facilities of the serving utility and the premises wiring.
service point
An enclosure constructed so that moisture will not enter the enclosure under specific test conditions is called "___________."
watertight
Conduit installed underground or encased in concrete slabs that are in direct contact with the earth is considered a ____________ location.
wet
A permanently connected surge-protective device (SPD) intended for installation on the load side of the service disconnect overcorrect device, including SPDs located at the branch panel, is a Type ____________ SPD.
2
A Class A GFCI protection device is designed to trip when the current to ground is ____________ or higher.
6 mA
In many circumstances, the authority having jurisdiction can be a property owner or his/her designated agent. True or False?
True
Capable of being removed or exposed without damaging the building structure or finish, or not permanently closed in by the structure or finish of the building is known as "___________."
accessible (as applied to wiring methods)
Admitting close approach not guarded by locked doors, elevation, or other effective means, is referred to as "_____________."
accessible (as applies to equipment)
Capable of being reached quickly for operation, renewal, or inspections without resorting to portable ladders or the use of tools (other than keys) is known as "___________."
accessible, readily
Internal parts of electrical equipment, including ____________, shall not be damaged or contaminated by a foreign materials such as pain, plaster, cleaners, abrasives, or corrosive residues.
all of these - busbars - wiring terminals - insulators
A hoist way is any ____________ in which an elevator or dumbwaiter is designed to operate.
all of these - hatchway or well hole - vertical opening or space - shaftway
Unless identified for use in the operating environment, no conductors or equipment shall be ____________ having a deteriorating effect on the conductors or equipment.
all of these - located in damp or wet locations - exposed to fumes, vapors, liquid, or gases - exposed to excessive temperatures
Wooden plugs driven into holes in ____________ or similar materials shall not be used for securing electrical equipment.
all of these - masonry - concrete - plaster
In judging equipment for approval, considerations such as ____________ shall be evaluated.
all of these - mechanical strength - wire-bending space - arcing effects
The maximum current, in amperes, that a conductor can carry continuously under the conditions of use, where the temperature will not be raised in excess of the conductor's insulation temperature rating is called its "___________."
ampacity
An arc-fault circuit interrupter is a device intended to de-energize the circuit when a(n) ____________ is detected.
arc fault
The NEC defines a(n) "____________" as a structure that stands alone or that is separated from adjoining structures by fire walls.
building
An enclosure designed for either surface mounting or flush mounting provided with a frame in which a door(s) can be hung is called a(n) "____________."
cabinet
Conductor sizes are expressed in American Wire Gage (AWG) or in ____________.
circular mils
Wires are considered ____________ if rendered inaccessible by the structure or finish of the building.
concealed
A " ____________ " is a device or group of devices that govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected.
controller
Composite optical fiber cables contain optical fibers and ____________ .
current-carrying electrical conductors
A(n) "___________" is a device, or group of devices, by which the conductors of a circuit can be disconnected from their source of supply.
disconnecting means
A ____________ is a single unit that provides complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation.
dwelling unit
A building that contains three or more dwelling units is called a "____________".
dwelling unit
Non conductive optical fiber cable contains no metallic members and no other ____________ materials.
electrically conductive
Surrounded by a case, housing, fence, or wall(s) that prevents persons from accidentally contacting energized parts is called "____________."
enclosed
The installed conductive path(s) that provide(s) a ground-fault current path and connected normally concurrent-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both, is known as a(n) "__________ conductor."
equipment grounding
A solderless pressure connector is a device that ____________ between two or more conductors or between one or more conductors and a terminal by means of mechanical pressure and without the use of solder.
establishes a connection
The word "Earth" best describes what NEC term?
ground
A(n) ____________ is an unintentional, electrically conductive connection between an ungrounded conductor of an electrical circuit, and the normally concurrent-carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or bath.
ground fault
A system intended to provide protection of equipment from damaging line-to-ground fault currents by causing a disconnecting means to open all ungrounded conductors of the faulted circuit levels less than the supply circuit overcorrect device defines "___________."
ground-fault protection of equipment
A system or circuit conductor that is intentionally grounded is called a(n) "______________."
grounded conductor
A conducting object through which a direct connection to earth is established is a "___________."
grounding electrode
A conductor used to connect the system grounded conductor, or the equipment to a grounding electrode or to a point on the grounding electrode system, is called the "__________ conductor."
grounding electrode
Conductor terminal and splicing devices shall be ____________ for the conductor material and they shall be properly installed and used.
identified
Connectors and terminals for conductors more finely stranded than Class B and Class C, as shown in Table 10 of Chapter 9, shall be ____________ for the specific conductor class or classes.
identified
Recognized as suitable for the specific purpose, function, use, environment, and application is the definition of "___________."
labeled
"Continuous duty" is defined as ____________.
operation at a substantially constant load for an indefinitely long time
A(n) "___________" is a point on the wiring system at which current is taken to supply utilization equipment.
outlet
An "optical fiber cable" is a factory assembly or field assembly of one or more optical fibers having a(n) ____________ covering.
overall
A panel, including buses and automatic overcorrect devices, designed to be placed in a cabinet or cutout box and accessible only from the front is known as a "__________."
panelboard
Constructed, protected, or treated so as to prevent rain from interfering with the successful operation of the apparatus under specified test conditions defines the term "____________."
rainproof
When one electrical circuit controls another circuit through a relay or an equivalent device, the first circuit is called a "_____________."
remote-control circuit
Equipment enclosed in a case or cabinet with a means of sealing or locking so that live parts cannot be made accessible without opening the enclosure is said to be "_____________."
sealable
The selection and installation of overcorrect protective devices so that an overcorrect condition will be localized to the restrict outages to the circuit or equipment affected, is called "____________"
selective coordination
A(n) "__________ system" is an electrical source, other than a service, having no direct connection(s) to circuit conductors of any other electrical source than those established by grounding and bonding connections.
separately derived
The "_____________" is the necessary equipment, usually consisting of a circuit breaker(s) or switch(es) and fuse(s) and their accessories, connected to the load end of service conductors, and intended to constitute the main control and cutoff of the supply.
service equipment
The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding defined acceptance criteria is known as the "___________."
short-circuit current rating
A "raceway" is an enclosed channel designed expressly for the holding of wires, cables, or busbars. with additional functions as permitted in the Code. True or False?
true
A rain tight enclosure is constructed or protected so that exposure to a beating rain will not result in the entrance of water under specified test conditions. True or False?
true
A(n) "__________" enclosure is constructed or protected so that exposure to the weather will not interfere with successful operation.
weatherproof
In other than swelling units, in addition to requirements for field or factory marking of equipment to warn qualified persons of potential electric arc-flash hazards, a permanent label shall be field or factory applied to service equipment rated ____________ or more.
1,200A
All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage and the working clearance space for outdoor installations shall include the zone describe in ____________.
110.26(A)
A minimum working space depth of ____________ ft to live parts of equipment operating at 277 volts-to-ground is required where there are exposed live parts on one side and no live or grounded parts on the other side.
3
The minimum working space on a circuit for equipment operating at 120 volts-to-ground, with exposed live parts on one side and no live or grounded parts on the other side of the working space, is ________ ft.
3
The required working space for access to live parts of equipment operating at 300 volts-to-ground, where there are exposed live parts on one side and grounded parts on the other side, is ______ ft.
3 1/2
The working space in front of the electric equipment shall not be less than _______ in. wide, or the width of the equipment, whichever is greater.
30
Where equipment operating at 1,000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized is required by installation instructions or function to be located in a space with limited access, the width of the working space shall be the width of the equipment enclosure or a minimum of ________ in., whichever is greater.
30
The minimum working space on a circuit for equipment operating at 750 volts-to-ground, with exposed live parts on one side and grounded parts on the other side of the working space, is _______ ft.
4
The required working space for access to live parts of equipment operating at 300 volts-to-ground, where there are exposed live parts on both sides of the workspace is ________ ft.
4
Live parts of electrical equipment operating at ____________, nominal, shall be guarded against accidental contact by approved enclosures or by suitable permanent, substantial partitions or screens arranged so that only qualified persons have access to the space within reach of the live parts.
50V to 1,000V
All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage and, for outdoor installations, the space equal to the width and depth of the equipment, and extending from grade to a height of _______ ft above the equipment, shall be dedicated to the electrical installation.
6
Equipment associated with the electrical installation can be located above or below other electrical equipment within their working space when the associated equipment does not extend more than ______ in. from the front of the electrical equipment.
6
For equipment rated 1,200A or more and over 6 ft wide that contains overcorrect devices, switching devices, or control devices, there shall be one entrance to and egress from the required working space not less than 24 in. wide and ________ ft high at each end of the working space.
6 1/2
Conductor ampacity shall be determined using the ____________ column of Table 310.15(B)(16) for circuits rated 100A or less or marked for 14 AWG through 1 AWG conductors.
60 degrees C
Conductors shall have their ampacity determined using the ____________ column of table 310.15 (B)(16) for circuits rated over 100A, or marked for conductors larger than 1 AWG, unless the equipment terminals are listed for use with higher temperature-rated conductors.
75 degree C
For circuits rated 100A or less, when the equipment terminals are listed for use with 75 degree C conductors, the ____________ column of Table 310.15(B)(16) shall be used to determine the ampacity of THHN conductors.
75 degrees C
Where equipment operating at 1,000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized is required by installation instructions or function to be located in a space with limited access, all enclosure doors or hinged panels shall be capable of opening a minimum of _______ degrees.
90
The dedicated space above a panel board extends to a dropped or suspended ceiling, which is considered a structural ceiling. True or False?
False
Industry standards are available for applications of reconditioned and refurbished equipment. ____________ servicing of equipment that remains within a facility should not be considered reconditioning or refurbishing.
Normal
__________ at other than dwelling units shall be legibly field marked with the maximum available fault current, include the date the fault-current calculation was performed, and be of sufficient durability to withstand the environment involved.
Service equipment
"Nonconductive optical fiber cable" is a factory assembly of one or more optical fibers with an overall covering and containing no electrically conductive materials. True or False
True
A "signaling circuit" is any electrical circuit that energizes signaling equipment. True or False
True
Accepted industry workmanship practices are described in ANSI/NECA 1-2015, Standard for Good Workmanship in Electrical Construction, and other ANSI-approved installation standards. True or False
True
Equipment intended to interrupt current at fault levels shall have an interrupting rating at nominal circuit voltage at least equal to the current that is available at the line terminals of the equipment. True or False
True
Field markings of maximum available fault current at a service are not required in industrial installations where conditions of maintenance and supervision ensure that only qualified persons service the equipment. True or False?
True
Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. True or False
True
Some cleaning and lubricating compounds can cause severe deterioration of many plastic materials used for insulating and structural applications in equipment. True or False
True
The minimum height of working spaces about electrical equipment, switchboards, panel boards, or motor control centers operating at 1,000V, nominal, or less and likely to require examination, adjustment, servicing, or maintenance while energized shall be 6 1/2 ft or the height of the equipment, whichever is greater, except for service equipment or panel boards in existing dwelling units that do not exceed 200A. True or False?
True
Where equipment operating at 1,000 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized is required by installation instructions or function to be located in a space with limited access, the space in front of the enclosure shall comply with the depth requirements of Table 110.26(A)(1). True or False?
True
When the term "exposed," as it applies to live parts, is used in the Code, it refers to ____________.
a and b - being capable of being inadvertently touched or approached nearer than a safe distance by a person - parts that are not suitably guarded, isolated, or insulated
Premises wiring includes ____________ wiring from the service point or power source to the outlets.
a and b - interior - exterior
All switchboards, panel boards, and motor control centers shall be ____________.
a and b - located in dedicated spaces - protected from damage
A cable routing assembly is composed of single or connected multiple channels as well as associated fittings, forming a structural system to ____________ communications wires and cables, optical fiber and data cables; and Class 2, Class 3, and Type PLTC cables; and power-limited fire alarm cables in plenum, riser, and general-purpose applications.
a and b - support - route
An accessory, such as a locknut, intended primarily to perform a mechanical function rather than an electrical function best describes ____________.
a fitting
Working space distances for enclosed live parts shall be measured from the ____________ of equipment or apparatus, if the live parts are enclosed.
a or b - enclosure - opening
A(n) ____________ that performs field evaluations of electrical or other equipment is known as a "Field Evaluation Body (FEB)."
a or b - part of an organization - organization
Service equipment labeling in other than dwelling units shall not be required if an arc-flash label is applied in accordance with ____________ industry practice.
acceptable
Electrical equipment rooms or enclosures housing electrical apparatus that are controlled by a lock(s) shall be considered ____________ to qualified persons.
accessible
Acceptable industry practices for equipment labeling are described in NFPA 70E, Standard for Electrical Safety in the Workplace. This standard provides specific criteria for developing arc-flash labels for equipment that provides ____________, and so forth.
all of these - nominal system voltage and incident energy levels - arc flash boundaries - minimum required levels of personal protective equipment
The ____________ of a circuit to be protected shall be selected and coordinated to permit the circuit protective devices to clear a fault without extensive damage to the electrical equipment of the circuit.
all of these - overcorrect devices - total circuit impedance - equipment short-circuit current ratings
A communications raceway is an enclosed channel of nonmetallic materials designed for holding communications wires and cables; optical fiber cables; data cables associated with information technology and communications equipment; Class 2, Class 3, and Type PLTC cables; and power-limited fire alarm cables in ____________ applications.
all of these - plenum - riser - general-purpose
Wiring shall be installed so that the completed system will be free from ____________, other than as required or permitted elsewhere in the Code.
all of these - short circuits - ground faults - connections to the earth
For a circuit to be considered a multiwire branch circuit, it shall have ____________ .
all of these - two or more ungrounded conductors with a voltage between them - a grounded conductor having equal voltage between it and each ungrounded conductor of the circuit - a grounded conductor connected to the neutral or grounded conductor of the system
Where caution, warning, or danger signs or labels are required by this Code, the label marking shall wand of the hazards using effective ____________.
any combination of words, colors, or symbols
A device that, when inserted in a receptacle, establishes a connection between the conductors of the attached flexible cord and the conductors connected permanently to the receptacle is called a(n) "____________ ."
any of these - attachment plug - plug cap - plug
Electrical equipment such as switchboards, switchgear, panel boards, industrial control panels, meter socket enclosures, and motor control centers, that are in other than dwelling units, and are likely to require ____________ while energized, shall be field or factory marked to warn qualified persons of potential electric arc-flash hazards.
any of these - examination - adjustment - servicing or maintenance
"Outline lighting" is an arrangement of ____________ to outline or call attention to the shape of a building.
any of these - incandescent lamps - electric-discharge lighting - electrically powered light sources
Live parts operating at 50V to 1,000V, nominal, shall be guarded by being ____________.
any of these - located in a room accessible only to qualified persons - located on a balcony accessible only to qualified persons - elevated 8 ft or more above the floor or other working surface for 50V to 300V between ungrounded conductors
Connection of conductors to terminal parts shall ensure a thoroughly good connection without damaging the conductors and shall be made by means of ____________.
any of these - solder lugs - pressure connectors - splices to flexible leads
"Special permission" is the written consent from the ____________.
authority having jurisdiction
The term "rainproof" is typically used in conjunction with enclosure type(s) ____________.
b and c - 3R - 3RX
Concrete, brick, or tile walls are considered ____________, as applied to working space requirements.
grounded
Connected (connecting) to ground or to a conductive body that extends the ground connection is called "___________."
grounded
When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably ____________.
guarded
Illumination shall be provided for all working spaces about service equipment, switchboards, switchgear, panel boards, or motor control centers ____________.
installed indoors
For equipment rated 800A or more that contains overcorrect devices, switching devices, or control devices; and where the entrance to the working space has a personnel door(s) less than 25 ft from the nearest edge of the working space, the door shall ____________.
open in the direction of egress and be equipped with listed panic hardware
On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, only the conductor or busbar having the higher phase voltage-to-ground shall be durable and permanently marked by an outer finish that is ____________ in color.
orange
Reconditioned equipment shall be marked with the name, trademark, or other descriptive marking by which the ____________ responsible for reconditioning the electrical equipment can be identified, along with the date of the reconditioning.
organization
NFPA 70E, Standard for Electrical Safety in the Workplace, provides guidance, such as determining severity of potential exposure, planning safe work practices, arc-flash labeling, and selecting ____________.
personal protective equipment
In locations where electrical equipment is likely to be exposed to ____________, enclosures or guards shall be so arranged and of such strength as to prevent such damage.
physical damage
When modifications to the electrical installation occur that affect the maximum available fault current at the service, the maximum available fault current shall be verified or ____________ as necessary to ensure the service equipment ratings are sufficient for the maximum available fault current at the line terminals of the equipment.
recalculated
Only wiring methods recognized as ____________ are included in this Code.
suitable
Where required by the Code, markings or labels on all electrical equipment shall contain voltage, current, wattage, or other ratings and the marking or label shall be of sufficient durability to withstand ____________.
the environment involved
Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so ____________.
the purpose is evident
Entrances to rooms and other guarded locations containing exposed live parts shall be marked with conspicuous ____________ forbidding unqualified persons to enter.
warning signs
