4A Final Flashcards
CATV coaxial cables installed on the
_______surface of ceilings and walls shall be supported by the building structure in such a manner that the cables will not be
damaged by normal building use.
Exposed/Concealed (A and B)
Exposed CATV cables shall be secured by hardware such as straps, staples, cable ties, hangers, or similar fittings designed and installed so as not to damage the cables.
True
Coaxial cables can be installed in listed communications raceways. If coaxial cables are installed in a listed communications nonmetallic raceway, the raceway shall be installed in accordance with 362.24 through 362.56, where the requirements applicable to ENT apply.
True
Indoor antenna lead-in conductors for radio and television receiving equipment can be in the same enclosure with conductors of other wiring systems where separated by an effective permanently installed barrier
True
If a separate grounding electrode is installed for the radio and television equipment, it shall be bonded to the building’s electrical power grounding electrode system with a bonding jumper not smaller than _____ AWG.
6 AWG
If the building or structure served has an intersystem bonding termination, the bonding conductor for an antenna mast shall be connected to the intersystem bonding termination.
True
Each lead-in conductor from an outdoor antenna shall be provided with a listed antenna discharge unit, unless enclosed in a continuous metallic shield that is either grounded or protected by an antenna discharge unit.
True
Accessible portions of abandoned communications cable shall be removed.
True
Communications circuits are circuits that extend_____and outside wiring for fire alarms and burglar alarms from the communications utility to the customer’s
communications equipment up to and including equipment such as a telephone, fax machine, or answering machine.
All of these (voice, audio and video, interactive services)
For buildings with a grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to the power service accessible means external to enclosures using the options identified in 250.94(A) Ex.
True
In one- and two-family dwellings, the primary protector bonding conductor or grounding electrode conductor for communications systems shall be as short as practicable, not to exceed ____ ft in length.
20
For buildings with grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to the nearest_____
Any of these-
buildings or structure, interior metal water pipe system,service equipment
Accepted industry practices for optical fiber installations are described in_______
All ANSI/NECA/BICSI/FOA
Optical fiber cables are not required to be listed and marked where the length of the cable within the building,measured from its point of entrance, does not exceed ______ft and the cable enters the building from the outside and is terminated in an enclosure.
50
Optical fiber cables shall not be ___ to the exterior of any conduit or raceway as a means of support.
All of these- strapped, taped, attached
Access to electrical equipment shall not be denied by an accumulation of optical fiber cables that ______removal of panels, including suspended-ceiling panels.
Prevents
Cable splices or terminations in power-limited fire alarm systems shall be made in listed______ or utilization equipment.
Any of these (fittings, boxes or enclosures, fire alarm devices)
Cable splices or terminations in power-limited fire alarm systems shall be made in listed or utilization equipment.
True
Fire alarm systems include______
All of these (fire detection and alarm, guards tour, sprinkler waterflow)
Fire alarm cables identified for future use shall be marked with a tag of sufficient durability to withstand_____
The environment involved
Fire alarm circuits shall be identified at all terminal and junction locations in a manner that helps prevent unintentional signals on fire alarm system circuits during
________of other systems.
Testing and servicing
One example of the use of Class 2 cables is a network of closed-circuit TV cameras using 24 AWG, 60°C rated, Type CL2R, Category 5e local area network (LAN) cables.
True
Due to its power limitations, a Class 2 circuit considers safety from a fire initiation standpoint and provides acceptable protection from electric shock.
True
Class 2 and Class 3 plenum cables listed as suitable for use in ducts, plenums, and other spaces used for environmental air shall Type______
CL2P and CL3P
Conductors of Class 2 and Class 3 circuits shall not be placed in any enclosure, raceway, cable, or similar fittings with conductors of Class 1 or electric light or power conductors, unless______
separated by a barrier
Equipment supplying Class 2 or Class 3 circuits shall be durably marked where plainly visible to indicate______
each circuit that is a Class 2 or Class 3 circuit
Where a portable generator greater than 15 kW, and for permanently installed generators for an optional standby system is installed outdoors and equipped with a readily accessible disconnecting means located______ an additional disconnecting means is not required where ungrounded conductors serve or pass through the building or structure.
within sight of the building or structure
A sign shall be placed at the service-entrance equipment indicating the______ of each on-site optional standby
power source.
A and B (Type, manufac.)
An emergency transfer switch for emergency systems shall supply only______
Emergency loads
In the event of failure of the normal supply to the building structure, emergency power shall be available within _______seconds.
10
Emergency systems circuit wiring shall be designed and located to minimize the hazards that might cause failure because of_______
All of these-flooding,fire,icing
Where an internal combustion engine is used as the prime mover for an emergency system, an on-site fuel supply demand operation of the system. shall be provided for not less than____ hours of full
2
Wiring from an emergency source to supply emergency and other (nonemergency) loads shall be permitted if the common bus of separate sections of the switchgear, separate sections of the switchboard, or the individual enclosures are supplied by single or multiple feeders______
A and B (without O/C protection at source and the other answer)
Emergency power systems are those systems legally required and classed as emergency by a governmental agency having jurisdiction. These systems are intended to automatically supply illumination and/or power essential for______
safety to human life
Emergency systems may provide power for ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious_____
life safety or health hazards
A storage battery supplying emergency lighting and power for emergency systems shall maintain not less than 871/2 percent of normal voltage at total load for a period of at least_______ hour(s).
1 1/2
Transformers that supply a fire pump motor shall be sized no less than ______percent of the sum of the fire pump motor(s) and pressure maintenance pump motors, and 100 percent of associated fire pump accessory equipment.
125
Ground-fault protection of equipment shall______ in any fire pump power circuit
Not be installed
Power to fire pump motors shall be supplied by a reliable source of power that has the capacity to carry the______
all of these (some of locked rotor current of motors, locked rotor current of pump motors and full load current of anything associated)
Fire pump supply conductors on the load side of the final disconnecting means and overcurrent device(s) can be routed through a building(s) using_____
Any of these (2 in. of concrete, a listed 2 hour fire rated assembly, a listed electrical circtuit protective system)
Where the conductors of more than one PV system occupy the same junction box or raceway with removable cover(s), the ac and dc conductors of each system shall be grouped separately by cable ties or similar means at least once, and then shall be grouped at intervals not to exceed_______
6 ft
A______ subarray has two conductors in the output circuit, one positive (+) and one negative (-). Two of these subarrays are used to form a bipolar photovoltaic array
Monopole
A ground-fault protection device or system required for PV systems shall______
All of these (interrupt the flow of fault current, detect a ground fault current, be listed for PV ground fault)
The solar_____ is the basic PV device that generates electricity when exposed to light.
Cell
Where exposed and subject to physical damage, PV array equipment grounding conductors smaller than 4 AWG shall be protected by a raceway or cable armor.
False
Where PV source and output circuits operating at greater than______are installed in a _______ location, the circuit conductors shall be guarded or installed in Type MC cable or in a raceway.
30V, readily accessible
An electrical production and distribution network, such as a utility and connected load, is internal to and controlled by a photovoltaic power system.
False
Where multiple utility-interactive inverters are remotely located from each other, a directory in accordance with 705.10 shall be provided at each PV system disconnecting means.
True
Currents of PV systems are to be considered
Continuous
In PV systems, a(n)______ is a complete, environmentally protected unit consisting of solar cells, and other components, exclusive of tracker, designed to generate direct-current power when exposed to sunlight.
Module
All 15A and 20A, 125V receptacles located within______ ft of the inside walls of a storable pool, storable spa, or storable hot tub shall be GFCI protected.
20
The feeder to a swimming pool panelboard at a separate building or structure where installed in a corrosive environment can be supplied with any Chapter 3 wiring method provided the feeder has a separate insulated copper equipment grounding conductor.
False
The outlet(s) that supplies a_____ shall be GFCI protected except as otherwise provided in 680.44.
All of these (self contained spa, packaged spa, field assembled spa)
Hydromassage bathtubs and their associated electrical components shall be on an individual branch circuit(s) and protected by a(n)_____GFCI
Readily accessible
Outlets supplying pool pump motors connected to single phase, 120V through 240V branch circuits, whether by receptacle or by direct connection, shall be provided with____ protection for personnel.
GFCI
Flexible cords immersed in or exposed to water in a fountain shall be_____
A and B (extra hard usage type, listed with a W suffix)
Where connecting to transformers or power supplies for pool lights in accordance with 680.23(F)(1), liquidtight flexible metal conduit shall be permitted but the length shall not exceed______ ft for any one length or exceed______ ft in total length used.
6,10
The ______ pool bonding conductor shall be connected to the equipotential bonding grid either by exothermic welding or by pressure connectors in accordance with 250.8.
All of these (8 awg, insulated or bare, copper)
Metal conduit and metal piping within_______ ft horizontally of the inside walls of the pool shall be bonded unless separated by a permanent barrier.
5
Where branch-circuit wiring on the supply side of enclosures and junction boxes connected to conduits run to underwater luminaires are installed in corrosive environments as described in 680.14, the wiring method of that portion of the branch circuit shall be _______
A and B
General purpose Type CL2, CM, or CMG cables are permitted within the raised floor area of an information technology equipment room if installed in accordance with 725.154(A).
True
Only electrical equipment and wiring associated with the operation of the information technology room is allowed to be installed in the room. This does include HVAC systems, communications systems, telephone, fire alarm systems, security systems, water detection systems, and other related protective equipment.
True
The remote disconnect means for the control of electronic equipment power and HVAC systems shall be grouped and identified. A single means to control both shall be permitted.
True
Separate information technology equipment units can be interconnected by means of listed cables and cable assemblies. Where exposed to physical damage, the installation shall be protected.
True
Branch-circuit conductors for data processing equipment in information technology equipment rooms shall have an ampacity not less than______of the total connected load
125 percent
Audio cables installed exposed on the surface of ceilings and sidewalls shall be supported in such a manner that they will not be damaged by normal building use. Cables shall be secured by_______ designed and installed so as not to damage the cable
Any of these
Flexible cords and flexible cables are permitted for the electrical connection of permanently installed equipment racks of audio systems to facilitate access to equipment.
True
Exposed audio cables shall be secured by______ or similar fittings designed and installed so as not to damage the cable.
Any of these
The accessible portion of abandoned audio distribution cables shall be removed.
True
All welding and cutting power equipment under the scope of Article 630 shall be______
Listed
A disconnecting means shall be provided in the supply circuit for each arc welder not equipped with_____ and the identity shall be marked in accordance with 110.22(A).
an integral disconnect
A(an)______ provides protection against electric shock of personnel for electric vehicles.
personnel protection system
The electric vehicle supply equipment located outdoors shall be located to permit direct electrical coupling of the EV connector to the electric vehicle.
True
The electric vehicle inlet is considered to be part of the electric vehicle supply equipment.
False
The_____ of electric vehicle supply equipment located indoors shall be located not less than 18 in. above the
floor level.
coupling means
An automotive-type vehicle for on-road use, such as______ primarily powered by an electric motor is known as an electric vehicle.
all of these
The branch circuit(s) supplying the lighting for an elevator machine room/machinery space shall be separate from the branch circuit(s) supplying the receptacle(s). The required lighting shall not be connected to the load side of a(n)______
GFCI
The lighting switch for hoistway pits shall be readily accessible from the___
pit access door
Where there is more than one driving machine in an elevator machine room, the disconnecting means shall be numbered to correspond to the identifying number of the _______
driving machine they control
The location of the disconnecting means for an elevator shall be located where it is_____ to qualified persons.
readily accessible
Seperate_____ shall supply the elevator hoistway pit lighting and receptacles and the required lighting shall not be connected to the load side of a ground-fault circuit interrupter.
Branch circuits
A manufactured wiring system is a system assembled by a manufacturer, which cannot be inspected at the building site without____
damage or destruction to the assembly
A permanent field-applied marking identifying the location of the disconnecting means shall be applied to the label shall comply with 110.21(B).
sign in a location visible during_____ and the warning label shall comply with 110.21(B).
Servicing
Signs with a retrofitted illumination system equipped with tubular light-emitting diode lamps powered by the existing sign sockets shall include a label visible during relamping that includes a warning not to install____lamps
fluorescent
Signs and outline lighting systems shall be installed so that adjacent combustible materials are not subjected to temperatures in excess of_____
90°C
Listed flexible metal conduit or listed liquidtight flexible metal conduit for secondary circuit conductors for neon tubing can be used as a bonding means if the total accumulative length of the conduit in the secondary
circuit does not exceed_____ft
100
Where the disconnecting means is out of the line of sight from any section of a sign or outline lighting able to be energized, the disconnecting means shall be_____ in the open position in accordance with 110.25.
lockable
Field-installed skeleton tubing lighting shall not be required to be_____ where installed in conformance with the Code.
Listed
Electric signs (other than portable, cord-connected signs), outline lighting, skeleton tubing systems, and retrofit kits shall be marked to indicate that field wiring and______are required
Instillation instructions
Multiwire branch circuits for temporary wiring shall be provided with a means to disconnect simultaneously all_______ conductors where the branch circuit originates.
ungrounded
For temporary installations, lamps shall be protected from accidental contact by a suitable_____ or by the use of a lampholder with a guard.
luminaire
GFCI protection is required for 15A, 20A, and 30A, 125V and 125V/250V receptacles that are part of a portable generator used for temporary wiring rated not greater than_______
15kw
Temporary wiring shall be ______ immediately upon the
completion of construction or purpose for which the
wiring was installed.
Removed
Temporary electrical power and lighting shall be permitted during emergencies and for_______
All of these
Temporary electrical power and lighting installations shall be permitted for a period not to exceed 90 days for_______ decorative lighting and similar purposes.
Holiday
For temporary power outlets existing or installed as permanent wiring, GFCI protection can be incorporated into a listed______
Any of these
At marinas, boatyards, and commercial and noncommercial docking facilities, the electrical datum plane, in land areas subject to tidal fluctuation, is a horizontal plane_____ ft above the highest high tide under normal circumstances.
2
The equipment grounding conductor at a marina is required to be an insulated copper conductor for all circuits.
False
A______ is an enclosed assembly that can include receptacles, circuit breakers, fused switches, fuses, watt hour meter(s), panelboards and monitoring means approved for marine use.
marine power outlet
A_____ shall be used to serve as the required shore power receptacle disconnecting means, and it shall be identified as to which receptacle it controls.
A and B
Electrical equipment enclosures on piers above deck level at marinas shall be securely and substantially supported by structural members, independent of any raceway connected to them.
True
The term mobile home includes manufactured homes, unless otherwise indicated.
True
Mobile home service equipment shall be located adjacent to the mobile home, located in sight from but not more than_____ ft from the exterior wall of the mobile home it serves.
30
For the purpose of this Code and unless otherwise indicated, the term “mobile home” includes manufactured homes and excludes park trailers defined in Article 552.4.
True
A _____ is a structure transportable in one or more sections that is built on a permanent chassis and designed to be used as a dwelling, with or without a permanent foundation, whether or not connected to the utilities, and includes plumbing, heating, air conditioning, and electrical systems contained therein.
manufactured or mobile home
Mobile home and manufactured home feeder circuit conductors shall have a capacity not less than_______
100A
Enclosures and fittings installed in areas of agricultural buildings where excessive dust may be present shall be designed to minimize the entrance of dust and shall have no openings through which dust can enter the enclosure.
True
An equipotential plane shall be installed in all concrete floor confinement areas of livestock buildings, and all outdoor confinement areas with a concrete slab that contains metallic equipment accessible to livestock and that may become energized.
True
Where____ may be present in an agricultural building, enclosures and fittings shall have corrosion-resistance properties suitable for the conditions.
Any of these
Luminaires used in agricultural buildings shall______
All of these
An equipotential plane is an area where wire mesh or other conductive elements are embedded in or placed under concrete, and bonded to________
All of these
Service equipment shall be securely fastened to a solid backing and be installed so as to be protected from the weather, unless of weatherproof construction.
True
At circuses and carnivals, all equipment to be grounded shall be connected to an)______ conductor of a type recognized by 250.118.
Equipment grounding
Electrical equipment and wiring methods in or on portable structures for carnival or circuses shall have mechanical protection where subject to______
Physical damage
GFCI protection is not permitted at carnivals, circuses, and fairs for______
egress lighting
Wiring for lighting located inside tents and concession areas at carnivals, circuses, and fairs, where subject to physical damage shall be provided with mechanical
protection.
True
[Category 2] spaces in health care facilities were formerly known as general care rooms [(spaces)] and include such spaces as_______
Any of these
A nursing home is a building or portion of a building used for the housing and nursing care, on a 24-hour basis, of________ or more persons who, because of mental or physical incapacity, might be unable to provide for their own needs and safety without the assistance of another person.
Four
The patient care space of a health care facility known as a “___ Space” is a space in which failure of equipment or a system is not likely to have a physical impact on patient care.
Support (Category 4)
The “Critical Care (Category 1) Space” of patient care spaces in health care facilities are spaces in which failure of equipment or a system is likely to cause______ injury or death to patients, staff, or visitors.
Major
Metal faceplates for switches and receptacles can be connected to the equipment grounding conductor by means of a metal mounting screw(s) securing the faceplate to a grounded outlet box or grounded wiring device in patient care spaces.
True
The “Basic Care (Category_____) Space” of a patient care space in a health care facility is a space in which failure of equipment or a system is not likely to cause injury to the patients, staff, or visitors but can cause patient discomfort
3
The requirements of Article 517 apply to buildings or portions of buildings, or mobile enclosures in which human medical, dental,____, , or surgical care are
provided.
Any of these
A listed seal for motor fuel dispensers shall be provided in each conduit run______
A or B
Underground wiring to motor fuel dispensers shall be installed in_______
Any of these
The devices or disconnects for attended self-service motor fuel dispensing facilities shall be______to the attendant
Readily accessible
The sealing fitting or listed explosionproof reducer at the seal for motor fuel dispensers shall be the______ fitting after the conduit emerges from the earth or concrete.
First
Underground wiring to motor fuel dispensers shall be installed in______
Any of these
Article 514 applies to_______ and fleet vehicle motor fuel dispensing facilities.
A and B
Article 503 covers the requirements for electrical and electronic equipment and wiring in Class III locations where fire or explosion hazards may exist due to ignitible_______
fibers/flyings
Luminaires in Class III locations exposed to physical damage shall be protected by a(n)_______guard
Suitable
Where LFMC is used in a Class III location as permitted in 503.10, it shall______
include an equipment bonding jumper of the wire type in accordance with 250.102
Raceways permitted in a Class III, Division 1 location include
Any of these
Boxes and fittings shall be________ where installed in a Class III location
Dustight
Seals in Class II hazardous (classified) locations shall be explosionproof.
False
Where flexibility is required, the following wiring methods are permitted in a Class II, Division 2 location_______
any of these
In Class II, Division 1 locations, control transformers, solenoids, impedance coils, resistors, and any overcurrent devices or switching mechanisms associated with them, shall have enclosures identified for________
Class II, Division 1 locations
In Class II locations, dust shall be prevented from entering the required dust-ignitionproof enclosure through a raceway by which of the following method(s)?
any of these
Raceways permitted as a wiring method in Class II, Division 1 locations include
threaded RMC and steel IMC
Wiring methods and materials permitted in Class I, Division 1 locations include
All of these
General-purpose enclosures and fittings are permitted in Class I, Division 2 locations unless the enclosure contains make-and-break contacts for_______ as required by
501.105(B)(1), 501.115(B)(1), 501.150(B)(1).
all of these
Type PVC conduit, Type RTRC conduit, and Type HDPE conduit shall be permitted in Class I, Division 1 underground locations where encased in a concrete envelope a minimum of ________in thick and provided with not less than _________ in. of cover measured from the top of the conduit to grade.
2,24
Luminaires installed in Class I, Division 1 locations shall be identified as a complete assembly for the Class I, Division 1 location and shall be clearly marked to indicate the _______ for which it is identified.
maximum wattage of lamps
A sealing fitting shall not be required if a metal conduit passes completely through a Class I, Division 2 location if the termination points of the unbroken conduit are located in unclassified locations and it has no fittings less than_________ in. of either side of the boundary of the hazardous (classified) location.
12
Class III locations are those that are hazardous because of the presence of_______
easily ignitible fibers or materials producing combustible flyings
When determining a Class I, Division 2 location, the________ is a factor that should be considered in determining the classification and extent of the location.
All of these
Equipment used in hazardous (classified) locations with metric threaded entries shall be installed using_______
B or C
A Class III, Division_______ location is where easily ignitible fibers/flyings are stored or handled but not manufactured.
2
Threaded conduits or fittings installed in hazardous (classified) locations shall be made wrenchtight to________
A & B
