Final Flashcards
Article 300 applies to wiring that is part of equipment.
False
Under certain conditions conductors of different systems (1000 V or less, AC and DC) may occupy the same raceway.
True
Per Table 300.5, RMC shall be buried under 12” of earth beneath a highway.
False
Seals shall be installed in spare or unused raceways and raceway systems whenever condensation is known to be a problem.
True
Splices or taps are never permitted without the use of splice boxes.
False
Raceway systems are always permitted to be used to support other raceways, cables, or nonelectric equipment.
False
The continuity of the grounded conductor of a multiwire branch circuit shall never depend upon device connections.
True
Under certain conditions EGCs are permitted to be run separate from their associated circuit conductors.
True
AC conductors installed in metal raceways or enclosures shall be arranged to provide induction heating of the metal raceways or enclosures.
False
Copper conductors in a vertical raceway require more supports than an equivalent length of aluminum conductors.
True
Holes that are drilled into framing members to permit the installation of raceways or cables shall be at least ___” from the nearest edge of the wood member.
1 1/4”
Where required, cables or raceways in notches of framing members shall be protected from nails or screws by a steel plate at least ___ “ thick.
1/16”
All cables and conductors emerging from the ground shall be protected from physical damage to a maximum depth of ___” below finished grade.
18”
At least ___” of free conductor shall be left at each outlet, junction, or switch point.
6”
An example of a(n) ___ space used for environmental air is the space over a hung ceiling used for environmental air.
“other”
Cables and raceways installed under streets, highways, roads, driveways, and parking lots shall be buried to a minimum depth of ___”.
24”
In an indoor wet location, the electrical panelboard metal enclosure shall be at least ___” from the masonry wall.
1/4”
Cables and conductors installed on the side of a pole or building shall be protected up to ___’ above finished grade. 5 7 1/2 10
none of the above
Boxes or cabinets marked “___” can be installed outdoors.
Raintight, rainproof or outdoor type
Per 300.19(A), conductor supports for 250 kcmil Cu conductors are required every ___’.
60
The minimum cover for a direct-buried cable in a location not specified in Table 300.5 is ___”.
24
When a conduit contains three or more conductors, the cross-sectional area of the conductors shall not exceed ___% of the internal cross-sectional area of the conduit.
40
The inductive heating effect of metal is minimized by cutting ___ between the holes for conductors.
slots
Underground, residential branch circuits that are rated 20 A, 1Φ, 120 V or less and are GFCI-protected shall have a minimum burial depth of ___”.
12
Cables and raceways in or under airport runways shall be buried to a minimum depth of ___”.
18
__ is the shortest distance measured between a point on the top surface of any direct-buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover.
cover
A 250 kcmil Al conductor requires conductor supports every ___’.
135
Cables and raceways installed in or under airport runways, including adjacent areas where trespassing is prohibited, shall be buried to a minimum depth of ___ inches.
18
Flexible metal conduit is permitted in ducts and plenums specifically fabricated for environmental air provided the length does not exceed ___ feet and it is used to connect physically adjustable equipment and devices.
4
In the 2020 NEC®, Section ___ was revised to address spaces under a raised floor that are protected by fire suppression systems and those that do not have fire suppression.
645.5(E)(2)
T/F Aluminum fittings and enclosures shall not be used with RMC.
False
T/F AC cable shall be installed at least 3⁄4” back from the finished edge of framing members.
False
T/F MC cable with a smooth sheath shall have a bending radius of a minimum of 10 times the diameter of the cable.
True
T/F The use of NM cable in any building or structure designated in NFPA 220 as Type I or II is prohibited unless the NM cables are installed in raceways that are permitted in Type I and II construction.
True
T/F A trolley busway has an open bottom.
True
T/F Type USE cable is listed for direct burial.
True
T/F Type NM cable has a flame-retardant and moisture-resistant outer jacket that is restricted to indoor wiring.
True
T/F Busways shall be used for indoor work only.
False
T/F Conduit bodies are named based upon their similarity to letters of the alphabet.
True
A(n) ___ is a metal or nonmetallic enclosed channel for conductors.
raceway
A(n) ___ is a short piece of conduit or tubing that does not exceed 24” in length.
nipple
A total run of PVC shall not exceed ___° of bends.
360
A(n) ___ assembly is a surface, flush, or freestanding raceway that contains conductors and receptacles.
multioutlet
A(n) ___ is a metallic or nonmetallic trough with a hinged or removable cover designed to house and protect conductors and cables.
wireway
A(n) ___ type conduit body has a hub at both ends.
C
An auxiliary gutter shall not extend more than ___’ beyond the equipment it supplements.
30
A(n) ___ is a double bend in a raceway.
offset
MC cable is a factory assembly of ___ or more conductors.
one
A(n) ___ is any point in the electrical system where current supplies utilization equipment.
outlet
A(n) ___ box is a box in which splices, taps, or terminations are made.
junction
The wall of a conduit body shall not be less than ___” thick.
3/32
A(n) ___ box is a box used as a point to pull or feed electrical conductors into a raceway system.
pull
__ is a welding process used to make electrical connections of copper to copper or copper to steel in which no outside source of heat or power is required.
cadwelding
A(n) ___ is a raceway consisting of a grounded metal enclosure that contains factory-assembled aluminum or copper busbars that are supported on insulators.
busway
T/F All panelboard cabinets and frames of panelboards shall be connected to an EGC.
True
T/F The neutral of an electrical system is always carrying the unbalanced current of that system.
True
T/F In general, only ungrounded conductors shall be opened by switches.
True
T/F Switchgear, switchboards, and panelboards are installed to control light and power circuits.
True
T/F Five different switches are defined in Article 100.
False
The two types of wire termination configurations for calculating wire-bending space are ___.
L and S
Snap switch terminals marked CO/ALR are for use with ___ conductors.
aluminum, copper, copper-clad aluminum
A(n) ___ is an overcurrent protective device with a mechanical mechanism that may manually or automatically open a circuit when an overload condition or short circuit occurs.
circuit breaker
In the NEC®, there are ___ conditions where a grounded conductor does not need to be provided.
five
There are ___ types of snap switches.
four
A(n) ___ is a device, with a current and voltage rating, used to open or close an electrical circuit.
switch
A(n) ___ is a large single panel, frame, or group of assembled panels with buses, overcurrent devices, and instruments.
Switchboard
In general, vertically mounted switches shall be ___ in the up position.
On
A(n) ___ is a single panel or group of assembled panels with buses and overcurrent devices, which may have switches to control light, heat, or power circuits.
Panelboard
A space of not less than ___’ shall be provided between the top of a switchboard and a combustible ceiling.
3
A surface-mounted switch installed in a wet location shall be enclosed in a(n) ___ enclosure.
weatherproof
The center of the grip of the operating handle of a knife switch, when in the highest position, shall not be more than ___ above the floor or working platform.
6’ 7”
A(n) ___ is an overcurrent protective device with a mechanical mechanism that may manually or automatically open the circuit when an overload condition or short circuit occurs.
circuit breaker
The arrangement of busbars and conductors in switchgear or a switchboard shall be such as to avoid overheating due to ___ effects.
inductive
Metal cabinets or cutout boxes installed in a wet location shall be spaced ___” off the wall to which they are mounted.
1/4
Double-throw knife switches mounted vertically shall be equipped with a locking device to prevent ___ from closing the blades.
gravity
Conduits or other raceways including their fittings shall not rise more than ___” above the bottom of switchgear, switchboards, or floor-mounted panelboards.
3
Panelboards supplied through transformers generally shall have their overcurrent protection located on the ___ side of the transformer.
secondary
An identified ___ is required to be securely installed between adjacent snap switches rated over 300 V.
barrier
Snap switches are permitted to be grouped or ganged in an enclosure provided the voltage between adjacent snap switches does not exceed ___ V.
300
T/F Generally, flexible cords and flexible cables shall be installed in continuous lengths without splices or taps.
True
T/F Lampholders shall not support lamps weighing over 6 lb.
True
T/F Trees may be used to support outdoor luminaires.
True
T/F All recessed HID luminaires shall be thermally protected.
True
T/F Class A GFCIs are designed to operate when the ground fault current flow is between 10 mA and 15 mA.
False
T/F All lighting track shall be permanently installed and permanently connected to a branch circuit.
True
T/F Metal faceplates are required to be grounded.
True
T/F In the 2020 NEC®, electric vehicle cable types EV, EVE, and EVT had their voltage ratings changed from 600 V to 750 V.
False
T/F Ten uses are permitted for flexible cords and cables per 400.10.
False
T/F In the 2020 NEC, cable types such as AC cable and MC cable are considered to be flexible type cables.
False
An outlet box for a recessed incandescent luminaire shall be at least ___’ from the fixture if the branch-circuit conductors are not suitable for the temperature.
1
The flexible cord for a kitchen in-sink food waste disposer shall be from ___” to ___” in length.
18; 36
Surface-mounted fluorescent fixtures can be installed above the door or on the ceiling with a minimum clearance of only ___” free space from the nearest storage space point.
6
Where there is ___ sq in. of surface area of exposed combustible wall or ceiling finish exposed, an outlet box must be covered with a noncombustible material to remove the concern about fire.
180
Per Section 402.6, the minimum size of a luminaire fixture wire is ___ AWG
18
The major difference between flexible cords and flexible cables is the number of insulated ___.
conductors
A(n) ___ is a complete lighting unit consisting of a light source such as a lamp or lamps together with the parts designed to distribute the light, to position and protect the lamps and ballast (where applicable), and to connect the lamps to the power supply.
lumiinaire
An electric-discharge luminaire utilizes a(n) ___ for the operation of the lamp.
ballast
Lighting track fittings shall not be equipped with general-purpose ___.
receptacles
___-grade receptacles are the highest grade receptacles manufactured by the electrical industry.
hospital
Outlet boxes used as the sole support of a ceiling suspended fan shall be listed and marked as being suitable and shall not support fans that weigh more than ___ lbs.
70
A(n) ___ switch is a switch with a marked OFF position that is part of an appliance
unit
Flexible cords not smaller than ___ AWG are considered protected by the overcurrent device.
18
Handholes are not required in ___’ or less metal poles which support luminaires if the base is hinged.
20
Any branch-circuit conductor located within ___” of a ballast, within a ballast compartment, shall have an insulation rating not lower than 90°C.
3
A minimum of ___” clearance shall be provided for recessed portions of luminaires from all combustible materials.
1/2
A(n) ___ is any utilization equipment which performs one or more functions.
appliance
Within sight is visible and no more than ___’ from the object.
50
Electric fixtures are not permitted within ___’ of the horizontal bathtub rim zone.
3
Electric fixtures are not permitted within ___’ of the vertical bathtub rim zone.
8
Ceiling fans shall be supported independently of an outlet box or by a listed outlet box or outlet box system ___ for the use.
identified
A(n) ___ luminaire is a luminaire designed with an internal thermal protective device that senses excessive operating temperatures and opens the supply circuit to the luminaire.
thermally protected
___ is installing a lamp of a higher wattage than that for which the luminaire is designed.
overlamping
Electric-discharge lamps operate at a much ___ temperature than incandescent lamps.
cooler
A(n) ___ luminaire is a luminaire that generates light from an arc lamp contained within an outer tube.
(high-intensity discharge (HID)
T/F Small motors rated 150 W or less shall be marked “impedance protected.”
False
T/F The larger a motor’s full-load table current, the less the percentage of the increase in sizing the thermal protector that is an integral part of the motor.
True
T/F A plug and receptacle may serve as a controller for stationary motors up to 2 HP.
False
T/F The winding type shall be given on the nameplate of a DC motor.
True
T/F The rated frequency shall be given on the nameplate of a motor controller.
True
T/F The overcurrent protection for an MCC may be located ahead or within the MCC.
True
T/F The ampere rating of a fusible disconnect is determined by the size of fuse being used in the motor branch circuit.
True
T/F A/C and refrigeration equipment with several motors can be considered as a single machine.
True
T/F In a fire pump system, overcurrent protection on the secondary of the transformer is required.
False
T/F With fire pumps, an on-site power production facility is a stand-by generator.
False
A ___ is an assembly of one or more enclosed sections with a common power bus and primarily containing motor control units.
motor control center
The disconnecting means for motor circuits are required to have an ampere rating of at least ___% of the FLC rating of the motor for circuits rated 1000 V or less.
115
A/C units that operate at ___ or less may be cord-and-plug-connected.
250 V, 1Φ
For generators, the phase conductors between the generator terminals and the first overcurrent device shall have an ampacity not less than ___% of the generator nameplate current rating.
115
Per Section 440.62(B) the rating of an A/C unit shall not exceed ___% of the branch-circuit conductor’s ampacity where no other loads are supplied.
80
Motor nameplates shall include the rated horsepower of ___ HP or more.
1/8
The ___ branch circuit is the point from the last fuse or circuit breaker protecting the motor circuit out to the motor.
Motor
Branch-circuit conductors supplying a single motor shall have an ampacity of ___% of the FLC rating as indicated on the appropriate FLC table.
125
The ___ is the device in a motor circuit which turns the motor ON or OFF.
contorller
A(n) ___ refrigerant motor-compressor is a combination compressor and motor enclosed in the same housing, having no external shaft or shaft seals, with the motor operating in the refrigerant.
hermetic
A(n) ___ is the operation of equipment in excess of normal, full-load current rating, or a conductor subject to a current in excess of the rated ampacity.
overload
Cord-and-plug-connected compressors and equipment shall be rated no greater than ___ A on 120 V circuits.
20
The length of flexible cords used to supply A/C units shall not exceed ___’ for 120 V units.
10
Table ___ is used to determine the current ratings of 3Φ AC motors.
430.250
The code letter or locked-rotor amps shall be listed on the nameplates of motors rated ___ HP or more.
1/2
If the service factor and temperature rise are not marked on the nameplate, the nameplate current should be multiplied by ___%.
115
The branch-circuit conductors on the line side of the controller for a multispeed motor shall be sized at ___% of the highest of the FLC ratings shown on the motor nameplate.
125
A(n) ___ device is a pilot light, buzzer, horn, or other type of alarm.
indicating
Equipment shall be located within ___’ and be visible to be considered within sight.
50
A wound rotor motor is similar to a(n) ___ motor.
squirrel cage
T/F A less-flammable liquid has a fire point of not less than 300°C.
True
T/F An autotransformer may be used to buck or boost the supply voltage.
True
T/F Transformers are required to be marked with a minimum distance or clearance from walls or other obstructions to facilitate the dissipation of heat.
True
T/F Individual dry-type transformers rated over 1121⁄2 kVA shall be enclosed in a fire-resistant room with materials having a 3-hour minimum fire rating.
False
T/F Askarel has been banned by the Environmental Protection Agency and its use as a transformer coolant is being phased out.
True
T/F All transformers are required to be insulated.
True
T/F Transformers are required to be installed outdoors only.
False
T/F The required clearances for proper transformer ventilation shall be clearly marked on the transformer.
True
T/F Personal doors for transformer vaults shall open in the direction of egress.
True
T/F In general, transformers are required to be grounded.
True
T/F Askarel is a flammable liquid that contains PCBs.
False
T/F There are five recognized NEMA insulation classifications for dry-type transformers.
False
T/F High-efficiency control transformers operate at high temperatures with moderate energy loss.
False
T/F Listed liquids do not contain any PCBs and cannot burn.
False
T/F Transformers are often classified by the type of enclosure that is employed.
False
T/F The NEMA insulation classifications for dry-type transformers are Classes ___.A, B, C, and D or A, B, C, and F or A, B, F, and H
none of the above
Liquid-filled transformers commonly have ___.
150 kVA to 3000 kVA ratings
A(n) ___ point is the lowest temperature at which a material can give off vapors fast enough to support continuous combustion.
fire
Common transformer mountings include ___.
vault
For transformer installations where the rated primary current is less than 2 A, the rating of the OCPD shall be permitted to be set at not more than ___% of the primary current.
300
Transformers are electrical devices that contain no ___ parts.
moving
A(n) ___ transformer has more windings in the primary than in the secondary.
step down
___ is the process by which oxygen mixes with other elements and forms a type of rust-like material.
oxidation
Temperature ___ is the amount of heat that an electrical component produces above the ambient temperature.
rise
Transformer vaults shall be constructed of materials with a minimum fire resistance of ___ hours.
3
__ hardware is door hardware that is designed to open easily in an emergency situation
Panic
Type ___ buildings have fire resistance ratings from 0 to 4 hours.
I
A vault floor in direct contact with the earth shall be constructed of at least ___” of concrete.
4
The minimum size of transformer vault ventilation openings for transformers rated less than 50 kVA is ___ sq ft.
1
Transformer vault ventilation openings for transformers rated over 50 kVA is calculated at ___ sq in. per kVA less than the area for grates, etc.
3
Transformer vault ventilation openings for transformers rated over 50 kVA is calculated at ___ sq in. per kVA less than the area for grates, etc.
supervised
The general rule for transformers rated 1000 V, nominal, or less is to protect the primary windings at not more than ___% of the rated primary current.
125
Type ___ buildings have fire resistance ratings from 0 to 2 hours.
II
Dry-type transformer insulation is based on an ambient temperature of ___°C.
40
Larger distribution transformers are commonly cooled by a(n) ___.
liquid
T/F Intrinsically safe systems may be used in Class I, II, or III locations to supply equipment.
True
T/F Each room or area within an occupancy shall be considered separately for the purpose of determining area classification.
True
T/F A Class I, Division 2 location is any location in which flammable gases pose a threat of explosion or ignition under normal conditions.
False
T/F Any wiring method permitted for use in Class III, Division 1 locations is also permitted for use in Class III, Division 2 locations.
True
T/F All 15 A and 20 A, 125 V receptacles installed in patient care spaces of pediatric wards, rooms, or other areas shall be listed tamper-resistant or shall employ a listed tamper-resistant cover.
True
T/F Portable lighting equipment used in Class I, Division 1 locations is permitted to include provisions for receiving attachment plugs.
False
T/F A Division 1 location is a hazardous location in which a hazardous substance is not normally present in the air in sufficient quantities to cause an explosion or ignitable mixtures of the hazardous materials.
False
T/F Pulverized sugar and cocoa are considered to be combustible dusts.
True
T/F Locknut-bushings or double locknuts can be used for bonding purposes.
False
T/F The two general wiring methods permitted for underground wiring in gasoline and service stations are threaded RMC and threaded steel IMC.
True
The standard classification system used by the NEC to determine the type of hazardous location is the ___ system.
Class, Division, and Group
An assembly occupancy is a building, structure, or portion of a building designed or intended for use by ___ or more persons.
100
All boxes and fittings used in Class I, Division 1 locations shall be ___ for such use.
approved
In the 2020 NEC®, the list of permissible wiring methods for Class II, Division 1 locations was expanded to a total of ___ methods.
seven
Dispensing devices for LP-gas must be located at least ___’ from any Class I liquid-dispensing device.
10
A(n) ___ is a location where there is an increased risk of fire or explosion due to the presence of flammable gases, vapors, liquids, combustible dusts, or easily ignitable fibers or flyings.
hazardous location
A(n) ___ is a fitting which is inserted into runs of conduit to isolate certain electrical apparatus from atmospheric hazards.
conduit seal
Excessive or high temperature is considered to be any temperature which exceeds ___% of the autoignition temperature in degrees Celsius of the gas or vapor involved.
80
A Class III, Division ___ location is any location where easily ignitable fibers or flyings are stored or handled.
2
Class I locations contain ___ groups of flammable gases or vapors.
4
The most stringent requirements for electrical equipment installed in hazardous locations are for Class ___ locations.
I
Motors or generators used in Class ___, Division 2 locations shall be totally enclosed, nonventilated, pipe-ventilated, water-air cooled, fan-cooled, or dust-ignition proof.
II
Fixed electrical equipment which may produce arcs or sparks shall be totally enclosed if located less than ___’ above the floor in commercial garages.
12
The disconnecting means for gasoline dispensers in attended service stations shall be no more than ___’ from the dispensers.
100
A spray booth interior where volatile flammable liquids are applied is a Class I, Division ___ location.
1
Enclosures constructed so that dust will not enter under specified test conditions are ___.
dusttight
Locations where ___ materials are the only materials stored or handled are not within the scope of Article 500.
pyrophoric
___ requires supplying an enclosure with a protective gas at a sufficient flow and positive pressure to reduce the concentration of any flammable gas or vapor to an acceptable level.
purging
When a nonmetallic method is used for underground wiring, threaded RMC or threaded IMC must be used for the last ___ feet of the underground run to emergence or the point of connection to the aboveground raceway.
2
T/F The basis of a wireless power system involves a transmitter coil and a receiver coil.
True
An essential electrical system consists of three separate and distinct systems: the ___, critical, and equipment systems.
life safety
T/F Powering utilization equipment directly from DC sources without intervening DC-AC and AC-DC conversion steps leads to higher efficiencies.
True
T/F Large-scale PV systems must provide means to address GFCI mitigation.
False
T/F An inverter is also known as a power conditioning unit (PCU).
True
T/F In 2020, the title of Subdivision 625.44(B) was changed from “Stationary Equipment” to “Nonmovable Equipment.”
False
T/F In the 2020 NEC®, the term “emergency responders” was replaced with the term “firefighters” to make it clear that the section is intended to protect firefighters.
True
T/F In the 2020 NEC®, the definition of “equipment approval” was revised to change the phrase “electric power production sources” to “electric power.”
False
T/F Section 706.20(B) requires that the ESSs for one- or two-family dwelling installations not exceed 75 V DC between conductors or to ground except for installations where live parts are not accessible during routine ESS maintenance.
False
T/F Most of the renewable energy systems covered by the Code have specific field marking and directory requirements.
True
T/F Article 712 permits five different grounding configurations for DC microgrid systems.
False
Article ___ covers the electrical conductors and equipment connecting an electric vehicle (EV) to premises wiring.
625
An EV ___ is a device that establishes an electrical connection to an EV when electrically coupled to an EV inlet for the purpose of power transfer and information exchange.
coupler
A(n) ___ is the basic PV device that generates electricity when exposed to light.
module
Article ___ includes all wind turbines regardless of size and requires that an entire wind turbine system be approved for the application by listing or field labeling.
694
Article ___ provides a list of requirements that must be followed when one or more electric power production sources are operating in parallel with a primary source or sources of power.
705
Article ___ applies to ESSs having a capacity greater than 1 kW that may be stand-alone or interactive with other electric power production sources.
706
A(n) ___ is a local energy grid or supply system that includes control capability, which has the ability to disconnect from the traditional utility-supplied grid and operate separately.
microgrid
PV system DC circuits on or in buildings are permitted to have a maximum voltage of ___ V.
1000
or PV systems, where the disconnecting means of the system is above ___ V, any enclosure door or hinged cover that exposes live parts must be locked or must require a tool to open.
30
A(n) ___ is a mechanically and electrically integrated grouping of modules with a support structure and system components, such as inverters, DC-to-DC converters, and attached associated wiring.
array
A(n) ___ is a wide range of automotive-type vehicles that utilize a rechargeable storage system, such as batteries, fuel cells, or PV arrays, to power an electric motor.
electric vehicle, EV
___ is the equipment that consists of the conductors, the EV connectors and attachment plugs, personal protection system, and all fittings and devices that are installed for the purpose of transferring energy between the premises wiring and the EV.
Electric vehicle supply equipment (EVSE)
A(n) ___ system is an electrical system that is comprised of a PV module array and the necessary components to convert solar energy into electrical power.
Solar PV
A(n) ___ is grouping of PV modules or panels that are mechanically integrated and supported by a structure or foundation.
array
A(n) ___ is an environmentally protected unit consisting of solar cells and other components designed to produce DC power.
inverter
A(n) ___ PV system is a system that has been designed to operate individually and can supply power independently from an electrical production and distribution network.
stand alone
Section ___ defines large-scale PV systems as those supply stations with an inverter-generating capacity of no less than 5000 kW.
691.1
Section ___ limits the turbine output circuit voltage to a maximum of 600 V for wind turbines that are connected to one- and two-family dwellings.
(694.10(A))
A(n) ___ system is a premises wiring system that has generation, energy storage and load(s), or any combination of these three that includes the ability to disconnect from and parallel with the primary source.
microgrid
___ systems are capable of storing excess energy that is generated from renewable energy systems, such as solar PV systems, fuel cell systems, or wind electric systems, or other on-site power production facilities and draw upon it at a later time for use.
energy storage
A(n) ___ is an electric power production system that operates in parallel with and delivers energy to an electric primary power source.
interactive system
A(n) ___ is a device that permits a microgrid system to separate from and reconnect to operate in parallel with a primary source.
MID
A(n) ___ is a grounding configuration that is not solidly grounded and has a low-resistance electrical reference that maintains voltage to ground in normal operation.
reference-grounded system
Article 100 defines approved as acceptable to the ___.
authority having jurisdiction
A(n) ___ is a grounding configuration that employs a high-resistance connection between the current-carrying conductors and the EGC.
resistively grounded system
