Mike Holy Shit That Was an Unnecessarily Large Assignment 250
Listed FMC can be used as the equipment grounding conductor if the conduit does not exceed trade size _____. 1 1/4 1 1/2 2 2 1/4
1 1/4
Listed FMC can be used as the equipment grounding conductor if the length in any ground return path does not exceed 6 ft and the circuit conductors contained in the conduit are protected by overcurrent devices rated at _____ or less. 15A 20A 30A 60A
20A
Where rock bottom is encountered, a rod or pipe electrode shall be driven at an angle not to exceed _____ degrees from the vertical. 15 30 45 60
45
A(An) _____ AWG or larger copper or aluminum grounding electrode conductor exposed to physical damage shall be protected in rigid metal conduit, IMC, Schedule 80 PVC conduit, reinforced thermosetting resin conduit Type XW (RTRC-XW), EMT, or cable armor. 10 8 6 4
6
Where not routed with circuit conductors as permitted in 250.130(C) and 250.134(A) Exception No. 2, equipment grounding conductors smaller than _____ shall be protected from physical damage by an identified raceway or cable armor. 10 AWG 8 AWG 6 AWG 4 AWG
6 AWG
An equipment grounding conductor shall be identified by _____. a continuous outer finish that is green being bare a continuous outer finish that is green with one or more yellow stripes any of these
Any of these
For grounded systems, the earth is considered an effective ground-fault current path. True False
FALSE
A grounded circuit conductor is permitted to ground noncurrent-carrying metal parts of equipment, raceways, and other enclosures on the supply side or within the enclosure of the ac service disconnecting means. True False
TRUE
A grounding electrode shall be required if a building or structure is supplied by a feeder. True False
TRUE
Equipment grounding conductors for feeder taps are not required to be larger than the tap conductors. True False
TRUE
Local metal underground systems or structures such as underground tanks are permitted to serve as grounding electrodes. True False
TRUE
The bonding jumper used to bond the metal water piping system shall be installed in accordance with 250.64(A), 250.64(B), and 250.64(E) and the points of attachment of the bonding jumper(s) shall be _____. readily accessible accessible enclosed secured
accessible
The intersystem bonding termination shall _____. be accessible for connection and inspection consist of a set of terminals with the capacity for connection of not less than three intersystem bonding conductors not interfere with opening the enclosure for a service, building/structure disconnecting means, or metering equipment all of these
all of these
The normally noncurrent-carrying metal parts of service equipment, such as service _____, shall be bonded together. raceways or service cable armor equipment enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor cable trays all of these
all of these
One or more equipment grounding conductors brought into a nonmetallic outlet box shall be arranged such that a connection can be made to _____ in that box requiring connection to an equipment grounding conductor. any fitting or device a ground-clip a clamp(s) the grounded conductor
any fittng or device
At existing buildings or structures, an intersystem bonding termination is not required if other acceptable means of bonding exists. An external accessible means for bonding communications systems together can be by the use of a(an) _____. nonflexible metallic raceway exposed grounding electrode conductor connection to a grounded raceway or equipment approved by the authority having jurisdiction any of these
any of these
Concrete-encased grounding electrodes that are installed where the concrete is installed with _____ is not considered to be in direct contact with the earth. insulation vapor barriers films any of these
any of these
_____ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity. Paint Lacquer Enamel any of these
any of these
The armor of Type AC cable is recognized by the NEC as an equipment grounding conductor. True False
TRUE
The grounded conductor of each separately derived system shall be bonded to the nearest available point of the metal water piping system(s) in the area served by each separately derived system and each bonding jumper shall be sized in accordance with Table 250.102(C)(1) based on the largest ungrounded conductor of the separately derived system. True False
TRUE
Two or more common grounding electrodes that are bonded together shall be considered as a single grounding electrode system in this sense. True False
TRUE
Two or more grounding electrodes bonded together are considered a single grounding electrode system. True False
TRUE
Grounding electrode conductors shall be installed in one continuous length without a splice or joint, unless spliced by _____. connecting together sections of a busbar irreversible compression-type connectors listed as grounding and bonding equipment the exothermic welding process any of these
any of these
Metal water piping system(s) shall be bonded to the _____, or to one or more grounding electrodes used, if the grounding electrode conductor or bonding jumper to the grounding electrode is of sufficient size. grounded conductor at the service service equipment enclosure grounding electrode conductor if of sufficient size any of these
any of these
The structural metal frame of a _____ shall not be used as an equipment grounding conductor. roof or crawl space wall or ceiling building or structure floor or window
building or structure
For grounded systems, electrical equipment and other electrically conductive material likely to become energized shall be installed in a manner that creates a _____ from any point on the wiring system where a ground fault may occur to the electrical supply source. circuit facilitating the operation of the overcurrent device low-impedance circuit circuit capable of safely carrying the ground-fault current likely to be imposed on it all of these
circuit capable of safely carrying the ground-fault current likely to be imposed on it
The upper end of the electrode shall be _____ unless the aboveground end and the grounding electrode conductor attachment are protected against physical damage as specified in 250.10. no more than 1 in. above ground level no more than 2 in. above ground level no more than 3 in. above ground level flush with or below ground level
flush with or below ground level
Grounded electrical systems shall be connected to earth in a manner that will _____. limit voltages due to lightning, line surges, or unintentional contact with higher-voltage lines stabilize the voltage-to-ground during normal operation facilitate overcurrent device operation in case of ground faults limit voltages due to lightning, line surges, or unintentional contact with higher-voltage lines and stabilize the voltage-to-ground during normal operation
limit voltages due to lightning, line surges, or unintentional contact with higher-voltage lines and stabilize the voltage-to-ground during normal operation
Where the resistance-to-ground of 25 ohms or less is not achieved for a single rod electrode, _____. other means besides electrodes shall be used in order to provide grounding the single rod electrode shall be supplemented by one additional electrode additional electrodes must be added until 25 ohms is achieved any of these
the single ro delectrode shall be supplemented by one additional electrode
A grounding electrode conductor shall be permitted to be run to any convenient grounding electrode available in the grounding electrode system where the other electrode(s), if any, is connected by bonding jumpers that are installed in accordance with 250.53(C). True False
true
Mechanical elements used to terminate a grounding electrode conductor to a grounding electrode shall be accessible. True False
true
The metal structural frame of a building shall be permitted to be used as a conductor to interconnect electrodes that are part of the grounding electrode system, or as a grounding electrode conductor. Hold-down bolts securing the structural steel column that are connected to a concrete-encased electrode that complies with 250.52(A)(3) and is located in the support footing or foundation shall be permitted to connect the metal structural frame of a building or structure to the concrete-encased grounding electrode. True False
true
Service conductors are parallel in three separate metal raceways. The ungrounded conductors in each raceway are 600 kcmil per phase. Determine the copper supply-side bonding jumper size for each service raceway. 1/0 AWG 3/0 AWG 250 kcmil 500 kcmil
1/0 AWG
When sizing grounded conductors for parallel raceways installed for a separately derived ac system and the system bonding jumper is not located at the source, they shall also be installed in parallel and not smaller than _____. 1 AWG 1/0 AWG 3/0 AWG 250 kcmil
1/0 AWG
Grounding electrodes of bare or electrically conductive coated iron or steel plates shall be at least _____ in. thick. 1/8 1/4 1/2 3/4
1/4
Expansion, expansion-deflection, or deflection fittings and telescoping sections of metal raceways shall be made _____ continuous by equipment bonding jumpers or other means. physically mechanically electrically directly
Electrically
Where isolated metal water piping systems are installed in a multiple-occupancy building, the water pipes can be bonded with bonding jumpers sized in accordance with 250.104(D). True False
FALSE
In ungrounded systems, electrical equipment, wiring, and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedance circuit from any point on the wiring system to the electrical supply source to facilitate the operation of overcurrent devices should a(an) _____ fault from a different phase occur on the wiring system. isolated ground arc high impedance second ground
second ground
A grounded conductor shall not be connected to normally noncurrent-carrying metal parts of equipment, to equipment grounding conductor(s), or be reconnected to ground on the load side of the _____ except as otherwise permitted. service disconnecting means distribution panel switchgear switchboard
service disconnecting means
Lightning protection system ground terminals _____ bonded to the building or structure grounding electrode system. shall be shall not be shall be permitted to be must be effectively
shall be
Grounding electrode conductors and grounding electrode bonding jumpers in contact with _____ shall not be required to comply with 300.5 but shall be buried or otherwise protected if subject to physical damage. water the earth metal all of these
the earth
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 False
true
Ferrous metal raceways and enclosures for grounding electrode conductors shall be electrically continuous from the point of attachment to cabinets or equipment to the grounding electrode. True False
true
Question 96 1 / 1 pts The metal water piping system(s) installed in or attached to a building or structure [250.104(A)(3)] shall be bonded to _____. the building or structure disconnecting means enclosure where located at the building or structure the equipment grounding conductor run with the supply conductors one or more grounding electrodes used any of these
any of these
The connection of the system bonding jumper for a separately derived system shall be made _____ on the separately derived system from the source to the first system disconnecting means or overcurrent device. in at least two locations in every location that the grounded conductor is present at any single point effectively
at any single point
Where practicable, rod, pipe, and plate electrodes shall be installed _____. directly below the electrical meter on the north side of the building below permanent moisture level all of these
below permanent moisture level
Buildings or structures supplied by multiple services or feeders shall use the same _____ to ground enclosures and equipment in or on that building. service disconnect grounding electrode system any of these
grounding electrode system
The receptacle grounding terminal of an isolated ground receptacle shall be connected to a(an) _____ equipment grounding conductor run with the circuit conductors. insulated covered bare solid
insulated
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 _____. combined rating of all the overcurrent devices largest overcurrent device protecting the circuit conductors combined rating of all the loads any of these
largest overcurrent device protecting the circuit conductors
A grounding electrode at a separate building or structure shall be required where one multiwire branch circuit serves the building or structure. True False
FALSE
Electrically conductive materials that are likely to _____ in ungrounded systems shall be connected together and to the supply system grounded equipment in a manner that creates a low-impedance path for ground-fault current that is capable of carrying the maximum fault current likely to be imposed on it. become energized require service be removed be coated with paint or nonconductive materials
become energized
A means external to enclosures for connecting intersystem _____ conductors shall be provided at the service equipment or metering equipment enclosure and disconnecting means of buildings or structures supplied by a feeder. bonding ungrounded secondary bonding and ungrounded
bonding
Conductors with insulation or individual covering that is _____, or otherwise identified by this section shall not be used for ungrounded or grounded circuit conductors. green or green with one or more yellow stripes grey black with a white stripe white
green or green with one or more yellow stripes
When an underground metal water piping system is used as a grounding electrode, bonding shall be provided around insulated joints and around any equipment that is likely to be disconnected for repairs or replacement. True False
true
If a building or structure is supplied by a service or feeder with _____ or more disconnecting means in separate enclosures, the grounding electrode connections shall be made in accordance with 250.64(D)(1), 250.64(D)(2), or 250.64(D)(3). one two three four
two
Where ungrounded supply conductors are paralleled in two or more raceways or cables, the bonding jumper for each raceway or cable shall be based on the size of the _____ in each raceway or cable. overcurrent protection for conductors grounded conductors ungrounded supply conductors sum of all conductors
ungrounded supply conductors
Where a metal underground water pipe is used as a grounding electrode, the continuity of the grounding path or the bonding connection to interior piping shall not rely on _____ and similar equipment. bonding jumpers water meters or filtering devices grounding clamps all of these
water meters or filtering devices
Grounding electrode conductors of the wire type shall be _____. solid stranded insulated or bare any of these
any of these
Receptacle yokes designed and _____ as self-grounding can, in conjunction with the supporting screws, establish the equipment bonding between the device yoke and a flush-type box. approved advertised listed installed
listed
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). 1/8 in. thick x 1 in. wide 1/8 in. thick x 2 in. wide 1/4 in. thick x 1 in. wide 1/4 in. thick x 2 in. wide
1/4 in. thick x 2 in. wide
What is the minimum size copper equipment bonding jumper for a 40A rated circuit? 14 AWG 12 AWG 10 AWG 8 AWG
10 AWG
The bonding jumper used to bond the metal water piping system shall be sized in accordance with Table _____ except as permitted in 250.104(A)(2) and 250.104(A)(3). 250.102(C)(1) 250.122 310.16 310.15(6)
250.102(C)(1)
The bonding jumper(s) required for the metal water piping system(s) installed in or attached to a building or structure supplied by a feeder(s) or branch circuit(s) shall be sized in accordance with _____. 250.66 250.102(D) 250.122 310.16
250.102(D)
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. True False
FALSE
Question 97 1 / 1 pts If exposed structural metal that is interconnected to form the building frame exists in the area served by the separately derived system, it shall be bonded to the grounded conductor of each separately derived system and each bonding jumper shall be sized in accordance with Table 250.102(C)(1) based on the largest grounded conductor of the service. True False
FALSE
Metal parts of cord-and-plug-connected equipment, if grounded, shall be connected to an equipment grounding conductor that terminates to a grounding-type attachment plug. True False
TRUE
Metal water piping systems and structural metal that is interconnected to form a building frame shall be bonded to separately derived systems in accordance with 250.104(D)(1) through 250.104(D)(3). True False
TRUE
Exposed structural metal interconnected to form a metal building frame that is not intentionally grounded or bonded and is likely to become energized, shall be bonded to the _____. service equipment enclosure or building disconnecting means grounded conductor at the service grounding electrode conductor where of sufficient size any of these
any of these
An electrode encased by at least 2 in. of concrete, located horizontally near the bottom or vertically and within that portion of a concrete foundation or footing that is in direct contact with the earth, shall be permitted as a grounding electrode when it consists of _____. bare copper conductor not smaller than 8 AWG bare copper conductor not smaller than 6 AWG bare copper conductor not smaller than 4 AWG bare copper conductor not smaller than 1/0 AWG
bare copper conductor not smaller than 4 AWG
A separately derived ac system supply-side bonding jumper shall be installed to the first disconnecting means enclosure and it is not required to be larger than the _____. neutral conductor derived phase conductors equipment grounding conductor the main service grounding electrode conductor
derived phase conductors
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(an) _____ parallel path. mechanically electrically physically effective
electrically
Ungrounded alternating-current systems from 50V to 1,000V or less that are not required to be grounded in accordance with 250.21(B) shall have _____. ground detectors installed for ac systems operating at not less than 100V and at 1,000V or less the ground detection sensing equipment connected as far as practicable from where the system receives its supply ground detectors installed for ac systems operating at not less than 120V and at 1,000V or less, and have the ground detection sensing equipment connected as close as practicable to where the system receives its supply ground-fault protection for equipment
ground detectors installed for ac systems operating at not less than 120V and at 1,000V or less, and have the ground detection sensing equipment connected as close as practicable to where the system receives its supply
The building or structure grounding electrode system shall be used as the _____ electrode for the separately derived system. grounding bonding grounded bonded
grounding
The frame of a portable generator shall not be required to be connected to a(an) _____ if the generator only supplies equipment mounted on the generator, cord-and-plug-connected equipment using receptacles mounted on the generator, or both. grounding electrode grounded conductor ungrounded conductor equipment grounding conductor
grounding electrode
The frame of a vehicle-mounted generator shall not be required to be connected to a(an) _____ if the generator only supplies equipment mounted on the vehicle or cord-and-plug-connected equipment, using receptacles mounted on the vehicle. grounding electrode grounded conductor ungrounded conductor equipment grounding conductor
grounding electrode
Where the main bonding jumper is a wire or busbar and is installed from the grounded conductor terminal bar or bus to the equipment grounding terminal bar or bus in the service equipment, the _____ shall be permitted to be connected to the equipment grounding terminal, bar, or bus to which the main bonding jumper is connected. equipment grounding conductor grounded service conductor grounding electrode conductor system bonding jumper
grounding electrode conductor
A grounded conductor shall not be connected to normally noncurrent-carrying metal parts of equipment on the _____ side of the system bonding jumper of a separately derived system except as otherwise permitted in Article 250. supply grounded high-voltage load
load
For a grounded system, an unspliced _____ shall be used to connect the equipment grounding conductor(s) and the service disconnect enclosure to the grounded conductor of the system within the enclosure for each service disconnect. grounding electrode main bonding jumper busbar insulated copper conductor
main bonding jumper
For the continuity of equipment grounding conductors and attachment in boxes, a connection used for _____ shall be made between the metal box and the equipment grounding conductor(s) in accordance with 250.8. bonding connections and splices extending the length of the circuit no other purpose
no other purpose
Where the supply conductors are larger than 1,100 kcmil copper or 1,750 kcmil aluminum, the main bonding jumper shall have an area that is _____ the area of the largest phase conductor when of the same material. at least equal to at least 50 percent of not less than 12 1/2 percent of not more than 12 1/2 percent of
not less than 12 1/2 percent of
If multiconductor cables are installed in parallel in the same raceway, auxiliary gutter, or cable tray, _____ equipment grounding conductor(s) that is(are) sized in accordance with 250.122 shall be permitted in combination with the equipment grounding conductors provided within the multiconductor cables and shall all be connected together. one two three four
one
If a building or structure is supplied by a feeder from an outdoor separately derived system, a system bonding jumper at both the source and the first disconnecting means shall be permitted if doing so does not establish a(an) _____ path for the grounded conductor. series parallel conductive effective
parallel
The grounded conductor brought to service equipment shall be routed with the phase conductors and shall not be smaller than specified in Table _____ when the service-entrance conductors are 1,100 kcmil copper and smaller. 250.102(C)(1) 250.122 310.16 430.52
250.102(C)(1)
Each tap conductor to a common grounding electrode conductor for multiple separately derived systems shall be sized in accordance with _____, based on the derived ungrounded conductors of the separately derived system it serves. 250.66 250.118 250.122 310.15
250.66
The common grounding electrode conductor installed for multiple separately derived systems shall not be smaller than _____ AWG copper when using a wire-type conductor. 1/0 2/0 3/0 4/0
3/0
The common grounding electrode conductor installed for multiple separately derived systems shall be permitted to be the metal structural frame of the building or structure that complies with 250.68(C)(2) or is connected to the grounding electrode system by a conductor not smaller than _____. 6 AWG copper 1/0 AWG copper 3/0 AWG copper or 250 kcmil aluminum 4/0 AWG aluminum
3/0 AWG copper or 250 kcmil aluminum
Question 85 1 / 1 pts Metal enclosures and raceways containing service conductors shall be connected to the grounded system conductor if the electrical system is grounded. True False
TRUE
When supplying a grounded system at a separate building or structure, an equipment grounding conductor shall be run with the supply conductors and connected to the building or structure disconnecting means and to the grounding electrode(s). True False
TRUE
A listed exposed work cover shall be permitted to be the grounding and bonding means for a surface-mounted metal box if the _____. device is attached to the cover with at least six fasteners that are permanent (such as a rivet) or have a thread locking or screw or nut locking means cover mounting holes are located on a curved, raised portion of the cover contact devices are designed and listed as self-grounding device is attached to the cover with at least two fasteners that are permanent (such as a rivet) or have a thread locking or screw or nut locking means, and the cover mounting holes are located on a flat non-raised portion of the cover
device is attached to the cover with at least two fasteners that are permanent (such as a rivet) or have a thread locking or screw or nut locking means, and the cover mounting holes are located on a flat non-raised portion of the cover
A(An) _____ shall be used to connect the grounding terminal of a grounding-type receptacle to a metal box that is connected to an equipment grounding conductor. equipment bonding jumper grounded conductor jumper equipment bonding jumper or grounded conductor jumper equipment bonding jumper and grounded conductor jumper
equipment bonding jumper
Auxiliary grounding electrodes can be connected to the _____. equipment grounding conductor grounded conductor earth as an effective ground-fault current path any of these
equipment grounding conductor
Metal enclosures shall be permitted to be used to connect bonding jumpers and _____, or both, together to become a part of an effective ground-fault current path. grounded conductors neutral conductors equipment grounding conductors. grounded phase conductors
equipment grounding conductors
Alternating-current circuits of less than 50V shall be grounded if supplied by a transformer whose supply system exceeds 150 volts-to-ground. True False
false
Where a main bonding jumper is a screw only, the screw shall be identified with a(an) _____ that shall be visible with the screw installed. silver or white finish etched ground symbol hexagonal head green finish
green finish
Grounding electrode conductors that are not subject to physical damage can be run exposed along the surface of the building construction if securely fastened to the surface on which they are carried. True False
TRUE
An insulated or covered conductor _____ AWG and larger shall be permitted, at the time of installation, to be permanently identified as an equipment grounding conductor at each end and at every point where the conductor is accessible. 8 6 4 1/0
4
Type MC cable provides an effective ground-fault current path and is recognized by the NEC as an equipment grounding conductor _____. when it contains an insulated or uninsulated equipment grounding conductor in compliance with 250.118(1) when the cable assembly contains a bare copper conductor only when it is hospital grade Type MC cable when it is terminated with bonding bushings
when it contains an insulated or uninsulated equipment grounding conductor in compliance with 250.118(1)
Where used outside, aluminum or copper-clad aluminum grounding electrode conductors shall not be terminated within _____ in. of the earth. 6 12 15 18
18
Equipment grounding conductors of the wire type shall not be required to be larger than the circuit conductors. True False
TRUE
Grounding electrode conductor taps from a separately derived system to a common grounding electrode conductor are permitted when a building or structure has multiple separately derived systems, provided that the taps terminate at the same point as the system bonding jumper. True False
TRUE
