B&G 3A Review Questions.
Electrical equipment permanently mounted on skids, and the skids themselves, shall be connected to the equipment grounding conductor sized as required by _____.
( 250.66.) 250.112(K)
Where rock bottom is encountered when driving a ground rod at an angle up to 45 degrees, the electrode can be buried in a trench that is at least _____ deep.
( 30 in.) 250.53(G)
In one- and two-family dwellings where it is not practicable to achieve an overall maximum primary protector grounding electrode conductor length of 20 ft, a separate communications ground rod not less than _____ ft shall be driven and it shall be connected to the power ground-ing electrode system with a 6 AWG conductor.
( 5.) 800.100(A)(4) Ex and 800.100(B)(3)(2)
A Class A GFCI protection device is designed to trip when the current to ground is _____ or higher.
( 6mA.) 100 Ground-Fault Circuit Interrupter, Note
In patient care spaces, an insulated equipment bonding jumper that directly connects to the equipment grounding conductor is permitted to connect the box and receptacle(s) to the equipment grounding conductor for other than _____ ground receptacles.
( Isolated.) 517.13(B)(1) Ex 1
_____ is a raceway of circular cross section having an outer liquidtight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core.
( LFMC.) 350.2
When installed for swimming pools, grounding and bonding terminals shall be _____ for direct burial use.
( listed.) 680.7
A(n) _____ system is an electrical source, other than a service, having no direct connection(s) to circuit conductors of any other electrical source other than those established by grounding and bonding connections.
( separately derived.) 100 Separately Derived System
Nonmetallic boxes can be used with _____.
nonmetallic sheaths, nonmetallic raceways, flexible cords, ( all of these.) 314.3
Bonding jumper(s) from grounding electrode(s) shall be permitted to be connected to an aluminum or copper busbar not less than _____ and of sufficient length to accommodate the number of terminations necessary for the installation in accordance with 250.64(F).
( 1/4 in. thick × 2 in. wide.) 250.64(F)(3)
In one- and two-family dwellings where it is not practicable to achieve an overall maximum bonding conductor or equipment grounding conductor length of _____ ft for CATV, a separate grounding electrode as specified in 250.52(A)(5), (A)(6), or (A)(7) shall be used.
( 20.) 820.100(A)(4) Ex
If the grounding electrode conductor or bonding jumper connected to a single or multiple rod, pipe, or plate electrode(s), or any combination thereof, as described in 250.52(A)(5) or (A)(7), does not extend on to other types of electrodes that require a larger size conductor, the grounding electrode conductor shall not be required to be larger than _____ AWG copper wire.
( 6.) 250.66(A)
The equipotential plane in an agricultural building shall be connected to the electrical grounding system with a solid copper, insulated, covered, or bare conductor and not smaller than _____ AWG.
( 8.) 547.10(B)
Type MC cable provides an effective ground-fault current path and is recognized by the NEC as an equipment grounding conductor when _____.
( A or B) 250.118(10)(a)and(b)
For equipotential bonding of pool and spa equipment, a solid 8 AWG copper conductor shall be run back to the service equipment. This conductor shall be unbroken.
( False.) 680.26(B)
Replacement luminaires are not required to be connected to an equipment grounding conductor if no equipment grounding conductor exists at the outlet box and the luminaire is_______.
( GFCI protected.) 410.44 Ex. 3
Two or more grounding electrodes bonded together are considered a single grounding electrode system.
( True.) 250.53(b) and 250.58
Where multimotor and combination-load equipment for air-conditioning and refrigeration is installed outdoors on a roof, a(n) _____ conductor of the wire type shall be installed in outdoor portions of metallic raceway systems that use non-threaded fittings.
( equipment grounding.) 440.9
The conductor used to ground the outer cover of a CATV coaxial cable shall be permitted to be _____.
(all of these.) 820.100(A)(1) and (3)
The connection between the grounded circuit conductor and the equipment grounding conductor at the service is accomplished by installing a(n) _____ bonding jumper.
(main.) 100 Bonding Jumper, main
Metal raceways, cable armor, and other metal enclosures shall be _____ joined together into a continuous electric conductor so as to provide effective electrical continuity.
(metallically.) 300.10
The grounding electrode conductor for an antenna mast shall be _____ where subject to physical damage.
(protected.) 810.21(D)
In completed installations, each outlet box shall have a _____.
cover, faceplate, canopy. ( any of these.) 314.25
Type _____ cable is a factory assembly of insulated circuit conductors within an armor of interlocking metal tape, or a smooth or corrugated metallic sheath.
( MC.) 330.2 Metal Clad Cable, Type MC
Exothermic or irreversible compression connections, together with the mechanical means used to attach to fireproofed structural metal, shall not be required to be accessible.
( True.) 250.68(A) Ex 2
In Class II locations, a permitted method of bonding is the use of bonding jumpers with proper fittings.
( True.) 502.30(A)
The continuity of the equipment grounding conductors at carnivals, circuses, fairs, and similar events shall be verified each time that portable electrical equipment is connected.
( True.) 525.32
Metal parts and equipment of signs and outline lighting systems shall be bonded together and to the transformer or power-supply equipment grounding conductor of the branch circuit or feeder supplying the sign or outline lighting system, with the exception that remote metal parts of a section sign or outline lighting system only supplied by a remote Class 2 power supply are not required to be connected to an equipment grounding conductor.
( True.) 600.7(B)(1) and Ex
Metal parts of electric equipment associated with an indoor spa or hot tub water circulating system shall be bonded together unless they are a part of a listed, labeled, and identified self-contained spa or hot tub.
( True.) 680.43(D)(2)
For community antenna television and radio distribution systems, where the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor can be connected to the power service accessible means external to enclosures using the options identified in 250.94(A) Ex.
( True.) 820.100(B)(2)(3)
The metal mounting yoke of a replacement switch is not required to be connected to an equipment grounding conductor if the wiring at the existing switch does not contain an equipment grounding conductor, and the _____.
( a or b.) 404.9(B) Ex 1
Exposed noncurrent-carrying metal parts of an information technology system shall be _____.
( a or b.) 645.15
In judging equipment for approval, considerations such as _____ shall be evaluated
( all of these.) 110.3(A)(2), (3), and (6)
Radio and television receiving antenna systems shall have bonding or grounding electrode conductors that are _____.
( all of these.) 810.21(A), (B), (C), and (D)
Steel or aluminum cable tray systems shall be permitted to be used as an equipment grounding conductor, provided the cable tray sections and fittings are identified as _____, among other requirements.
( an equipment grounding conductor.) 392.60(B)(1)
As applied to wiring methods, "on or attached to the surface, or behind access panels designed to allow access" is known as _____.
( exposed.) 100 Exposed (as applied to wiring methods)
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.) 503.1
Connected (connecting) to ground or to a conductive body that extends the ground connection is called "_____."
( grounded.) 100 Grounded (Grounding).
Conductor terminal and splicing devices shall be _____ for the conductor material and they shall be properly installed and used.
( identified.) 110.14
For PV systems, a(n) _____ is a device that changes direct- current input to an alternating-current output.
( inverter.) 690.2 Inverter
Bare aluminum or copper-clad aluminum grounding electrode conductors shall not be used where in direct contact with _____ or where subject to corrosive conditions.
( masonry or the earth.) 250.64(A)
The grounding electrode conductor for an antenna mast shall be _____ where subject to physical damage.
( protected.) 810.21(D)
In health care facilities, the grounding terminals of isolated ground receptacles installed in branch circuits for patient care _____ shall be connected to an insulated equipment grounding conductor in accordance with 250.146(D) in addition to the equipment grounding conductor path required in 517.13(A).
( spaces.) 517.16(B)(1)
A cable tray is a unit or assembly of units or sections and associated fittings forming a _____ system used to securely fasten or support cables and raceways.
( structural.) 392.2 Cable Tray System
Faulted circuits required to have ground-fault protection in a photovoltaic system shall be isolated by automatically disconnecting the _____ conductors, or the inverter charge controller fed by the faulted circuits shall automatically stop supplying power to output circuits.
( ungrounded.) 690.41(B)(2)
Wet-niche luminaires installed in swimming pools shall be removable from the water for inspection, relamping, or other maintenance. The luminaire maintenance location shall be accessible _____.
(without entering the pool water.) 680.23(B)(6)
Which of the following appliances installed in residential occupancies need not be connected to an equipment grounding conductor?
( A toaster.) 250.114(3)a and b
Metal faceplates for receptacles shall be grounded.
( True.) 406.6(B)
The bonding conductor or grounding electrode conductor for an antenna mast or antenna discharge unit shall be run to the grounding elec-trode in as straight a line as practicable.
( True.) 810.21(E)
In completed installations, each outlet box shall have a _____.
( any of these.) 314.25
The NEC requires that electrical equipment be _____.
( installed in a neat and workmanlike manner. ) 110.12
A neutral conductor is the conductor connected to the _____ of a system, which is intended to carry current under normal conditions.
( neutral point.) 100 Neutral Conductor
A wire-type equipment grounding conductor is permitted to be used as a grounding electrode conductor if it meets all of the requirements of Parts II, III, and VI of Article 250.
(True.) 250.121 Ex
If circuit conductors are installed in parallel in the same raceway or cable tray, a single wire-type conductor shall be permitted as the equipment grounding conductor and sized in accordance with 250.122, based on the overcurrent protective device for the _____.
(a) feeder, (b) branch curcuit.( a or b.) 250.122(F)(1)(A)
The metal mounting yoke of a replacement switch is not required to be connected to an equipment grounding conductor if the wiring at the existing switch does not contain an equipment grounding conductor, and the _____.
(a)switch faceplate is nonmetallic with nonmetallic screws, (b)replacement switch is GFCI protected ( a or b.) 404.9(B) Ex 1
For communications systems using coaxial cable completely contained within the building (that is, they do not exit the building) or the exterior zone of protection defined by a _____ radius rolling sphere and isolated from outside cable plant, the shield shall be permitted to be grounded by a connection to an equipment grounding conductor as described in 250.118.
( 150-ft.) 820.100 Ex
_____ is a raceway of circular cross section made of a helically wound, formed, interlocked metal strip.
( FMC.) 348.2
The term "Luminaire" means a single individual lampholder by itself.
( False.) 100 Luminaire
An encased or buried connection to a concrete-encased, driven, or buried grounding electrode shall be accessible.
( False.) 250.68(A) Ex 1
A snap switch with an integral nonmetallic enclosure complying with 300.15(E) is required to be connected to an equipment grounding conductor.
( False.) 404.9(B) Ex 3
In Class III locations, locknut-bushing and double-locknut types of fittings may be depended on for bonding purposes.
( False.) 503.30(A)
The equipment grounding conductor at a marina is required to be an insulated copper conductor for all circuits.
( False.) 555.15(B)
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.) 680.25(A)
Limiting the length of the primary protector grounding conductors for communications circuits helps to reduce voltage between the building's _____ and communications systems during lightning events.
( Power.) 800.100(A)(4) Note
Luminaires and equipment shall be mechanically connected to an equipment grounding conductor as specified in 250.118 and shall be sized in accordance with _____.
( Table 250.122.) 410.44
Snap switches, including dimmer and similar control switches, shall be connected to an equipment grounding conductor and shall provide a means to connect metal faceplates to the equipment grounding conductor, whether or not a metal faceplate is installed.
( True.) 404.9(B)
Where attachment to an equipment grounding conductor does not exist in the receptacle enclosure, a non-grounding-type receptacle(s) shall be permitted to be replaced with a GFCI-type receptacle(s) where supplied through a ground-fault circuit interrupter; however, some cord-and-plug-connected equipment or appliances require an equipment grounding conductor and are listed in 250.114.
( True.) 406.4(D)(2)(c) Note 2
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.) 517.13(B)(1) Ex 2
Conductors with the color _____ insulation shall not be used for ungrounded or grounded conductors.
(a or b.) 250.119
Local metal underground systems or structures such as _____ are permitted to serve as grounding electrodes.
( all of these.) 250.52(A)(8)
Where attachment to an equipment grounding conductor does not exist in the receptacle enclosure, a non-grounding-type receptacle(s) shall be permitted to be replaced with a GFCI-type receptacle(s) where supplied through a ground-fault circuit interrupter and _____ shall be marked "GFCI Protected" and "No Equipment Ground," visible after installation.
(a)the receptacle(s), (b)their cover plates ( a or b.) 406.4(D)(2)(c)
Article 410 covers luminaires, portable luminaires, lampholders, pendants, incandescent filament lamps, arc lamps, electric-discharge lamps, and _____, and the wiring and equipment forming part of such products and lighting installations.
( all of these.) 410.1
Agricultural buildings where excessive dust and dust with water may accumulate, including all areas of _____ confinement systems where litter dust or feed dust may accumulate shall comply with Article 547.
( all of these.) 547.1(A)
Which of the following shall be bonded?
( all of these.) 680.26(B)(3) through (6)
The terminal of a wiring device for the connection of the equipment grounding conductor shall be identified by a green-colored, _____.
( any of these.) 250.126(1), (2), and (3)
Grounding electrode conductors shall be installed in one continuous length without a splice or joint, unless spliced by _____.
( any of these.) 250.64(C)(1) and (2)
Snap switches are considered to be part of the effective ground-fault current path when _____.
( b or c) 404.9(B)(1) and (2)
Snap switches are considered to be part of the effective ground-fault current path when _____.
( b or c.) 404.9(B)(1) and (2)
Metal cable trays containing only nonpower conductors (such as communications, data, and signaling conductors and cables) shall be electrically continuous through approved connections or the use of a(n) _____.
( bonding jumper.) 392.60(A)
Equipment grounding conductors for motor branch circuits shall be sized in accordance with Table 250.122, based on the rating of the _____ device.
( branch-circuit short-circuit and ground-fault protective. ) 250.122(D)(1)
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.) 100 Cabinet
When ungrounded circuit conductors are increased in size to account for voltage drop, the wire-type equipment grounding conductor shall be proportionately increased in size according to the increase in size of the ungrounded conductors using their _____.
( circular mil area.) 250.122(B)
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.) 100 Disconnecting Means
A ground-fault current path is an electrically conductive path from the point of a ground fault through normally noncurrent-carrying conductors, equipment, or the earth to the ______.
( electrical supply source.) 100 Ground-Fault Current Path
Ferrous metal raceways and enclosures for grounding electrode conductors shall be bonded at each end of the raceway or enclosure to the grounding electrode or grounding electrode conductor to create a(n) _____ parallel path.
( electrically.) 250.64(E)(1)
Metal enclosures for switches or circuit breakers shall be connected to the circuit _____.
( equipment grounding conductor.) 404.12
The _____ conductor of the circuit supplying metal parts of portable structures at a carnival, circus, or fair can serve as the required bonding means.
( equipment grounding.) 525.30
The _____ conductor terminals of a junction box (pool deck box), transformer enclosure, or other enclosure in the supply circuit to a wet-niche luminaire shall be connected to the equipment grounding terminal of the panelboard.
( equipment grounding.) 680.24(F)
Article 517 applies to electrical construction and installation criteria in health care facilities that provide services to _____.
( human beings.) 517.1
For PV systems, metallic mounting structures used for grounding purposes shall be _____ as equipment grounding conductors or have _____ bonding jumpers or devices connected between the separate metallic sections and be bonded to the grounding system.
( identified, identified.) 690.43(B)
In health care facilities, the equipment grounding conductor connected to the grounding terminals of isolated ground receptacles in patient care spaces shall be clearly _____ along the equipment grounding conductor's entire length by green insulation with one or more yellow stripes.
( identified.) 517.16(B)(1)
Where flexibility _____, liquidtight flexible metal conduit shall be permitted to be used as an equipment grounding conductor when installed in accordance with 250.118(6).
( is not required after installation.) 350.60
When a single equipment grounding conductor is used for multiple circuits in the same raceway, cable, or cable tray, the single equipment grounding conductor shall be sized according to the _____.
( largest overcurrent device of the multiple circuits.) 250.122(C)
Except as provided in 250.122(F)(2)(b) for raceway or cable tray installations, the equipment grounding conductor in each multiconductor cable shall be sized in accordance with 250.122 based on the _____.
( overcurrent protective device for the feeder or branch circuit.) 250.122(F)(2)
_____ is an unthreaded thinwall raceway of circular cross section designed for the routing and physical protection of electrical conductors and cables when joined together with listed fittings.
(EMT.) 358.2
Listed liquidtight flexible metal conduit (LFMC) is acceptable as an equipment grounding conductor when it terminates in listed fittings and is protected by an overcurrent device rated 60A or less for trade sizes 3/8 through 1/2.
(False.) 250.118(6)a and b
Handhole enclosure covers shall have an identifying _____ that prominently identifies the function of the enclosure, such as "electric."
(a) mark (b) logo. ( a or b) 314.30(D)
Exposed noncurrent-carrying metal parts of an information technology system shall be _____.
(a)bonded to an equipment ground-ing conductor, (b)double insulated ( a or b.) 645.15