3rd Year Second Half (Quiz 2)
No equipment grounding means exists in the outlet
A GFCI receptacle device is permitted as a replacement for a non-grounding type receptacle under which of the following conditions?
No equipment grounding means exists in the outlet
A GFCI receptacle device is permitted as a replacement fro a non grounding type receptacle under which of the following conditions
#6 AWG
All grounding electrode conductors in sizes small than _______ must be protected from physical damage by installation in raceway or cable armor
Self-grounding
An equipment bonding jumper from metal box to a grounding-type receptacle is not necessary for a _____ type receptacle
An orange triangle on the receptacle
An isolated grounding type receptacle is required to be identified by which of the following means?
Larger than
Equipment grounding conductors are not required to be ____ the circuit conductors supply equipment
#6 AWG
Equipment grounding conductors installed with medium voltage cable are generally required to be sized based on Table 250.122 and never smaller than _____ copper
Listed
Fittings for wiring methods such as electrical metallic tubing and armored cable are required to be _______
1/0 AWG
If PVC conduit is installed for an 800 ampere feeder supplying a separate building, what is the minimum size wire type copper equipment grounding conductor required to be installed with the feed conductors?
#6 AWG
If a 200 ampere feeder is installed from a service to panelboard in a building and is run in PVC conduit, a minimum _____ copper equipment grounding conductor is required
10 AWG copper
If a submersible pump in a metal well casing is protected a 30 amperes, the equipment grounding conductor connected to the motor at the well casing must not be smaller than ____ .
3/0
Wehre more than one separately derived system is grounded using an common grounding electrode conductor, the common grounding electrode conductor shall be sizd based at not less than ____ copper
1/0 AWG
What is the minimum size aluminum main bonding jumper (wire-type) for a service if the largest ungrounded service conductor is 500 Kcmil copper
#10 AWG
What is the minimum size copper equipment grounding conductor required for a 60 ampere branch circuit?
#10 AWG
What is the minimum size required for an isolated / insulated equipment grounding conductor installed for a30-ampere single receptacle on an individual circuit protected at 30 amperes
#2 AWG copper
What size copper grounding electrode conductor is required for separately derived system with 4/0 copper ungrounded derived phase conductors if the grounding electrode is metal building frame electrode in accordance with 250.52(A)(2)
1/0
Where a generator separately derived system is installed and there is no over current device at the generator, what is the minimum size required for the supply side bonding jumper(copper) installed with the ungrounded derived phase conductors to the first disconnecting means enclosure if the ungrounded phase conductors are 750 kcmil aluminum
1/0
Where a generator separately derived systems is installed and there is no over current device at the generator, what is the minimum size required for the supply side bonding jumper (copper) installed with the ungrounded derived phase conductors to the first disconnecting means enclosure if the ungrounded phase conductors are 750 kcmil aluminum
250.92 (B)(2) through (4)
Where concentric, eccentric, or oversized knockouts are encountered in circuits over 250 volts phase to ground, one of the bonding methods in section ____ must be applied to ensure the required continuity and conductivity
Single conductor
Where more than one raceway enters or leaves a switch board, pull or junction box, or other equipment, it is permissible to use a ______ to bond these raceways to the equipment where sized appropriately
#6 AWG
Where the grounding electrode for separate building or structure is a single ground rod, the minimum size grounding electrode conductor required if the feeder supplying separate building or structure is sized at 2,500 amperes is _____.
Table 250.122
Which NEC table is used to size equipment bonding jumpers on the load side of a fuse or circuit breaker?
6 feet
a distance of not less than _____ shall be maintained between an eight-foot ground rod and the next closest ground rod
Electrical noise
isolated grounded circuits and receptacles are installed in an effort to reduce _____ that can interfere with data systems and equipment.
Applicable service or separately derived system
the insulated EGC connected to an isolated grounding type receptacle is permitted to pass thorough one or more panel boards or other enclosures without a grounding connection as long as it terminates a the grounding point at the _______ .
Equipment bonding jumper
where loosely jointed metal raceways are used and especially where there are expansion joints or telescoping sections of raceways the National Electrical Code required that they be made electrically continuous by the use of a(n)_______ or other means
supply side bonding jumper
A ___________ is a conductor installed on the supply side of a service or separately derived system to ensure the required electrical conductivity between metal parts required to be electrically connected
Grounding electrode system
A connection to ground through a ____ is generally required separate building or structures to establish a reference to ground at that location.
Grounding Electrode System
A connection to ground through a _____ is generally required at separate buildings or structures to establish a reference to ground at that location
accessible
A grounding electrode connection is required to be made at a(n) _______ location anywhere from the load end of the overhead service conductors service drop underground service conductors, or service lateral up to and including terminal or bus to which the grounded conductor is connected in the service disconnecting means.
2 ft²
A plate electrode is required to have not less than ____ of surface in direct contact with the earth.
20 feet
A rod or pipe electrode is generally required to be driven to a depth of not less than
#2 AWG copper
A separately derived system is installed and has 4/0 AWG copper conductors installed from the secondary of the system to a 225-ampere panelboard. What is the minimum size copper bonding jumper for a metal water piping system that serves the same are that is served by the separately derived system?
80%
A single grounding electrode conductor installed in a ferrous metal raceway must not exceed ______ of the cross-sectional area of the raceway.
Effective ground fault path
A(n) _____ is an intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the pint of grounding on a wiring system to the electrical supply source and one that facilitates the operation of the over current device or ground fault detectors on a high impedance system.
Equipment bonding jumpers
A(n) _____ is generally required to connect the grounding terminal of a grounding - type receptacle to a grounded box
Bonding conductor or jumper
A(n) _____ is reliable conductor to ensure the required electrical continuity between metal parts required to be electrically connected.
equipment bonding jumper
A(n) _____ is the connection between two or more portions of the equipment grounding conductor.
Separately derived system
A(n)______ is a premises wiring system whose power is derived from a source of electric energy or equipment other than a service. Such systems have no direct connection from circuit conductors of one system to circuit conductors of another system, other than those established through bonding or grounding connections.
3/0 AWG copper
If a generator has a 1200 ampere over current device installed at the generator set, a minimum size of ____ copper is required for EGCs installed in conduit of a parallel set of four inch PVC conduits routed from the generator to the first system over current dive enclosure
10 feet / 6 feet
If equipment is located more than ___ vertically and ___ horizontally from ground or grounded objects and not subject to contact by persons, grounding is not required.
#8 AWG
If multiple branch circuits (20-, 30-, 40-, 50-, 60- and 100-ampere) are installed in a single three-inch conduit, and the largest circuit is protected at 100 amperes, what is the minimum-size copper equipment grounding conductor required in a raceway
250.30(A)
If over current protection is not provided where the conductors originate, at a grounded separately derived system source supplying a separate building or structure, the installation must comply with NEC section_____
Higher / faster
Inverse time operation of overcurrent devices means that the ___ the current, the ____ the device will react to the ground fault or short circuit event.
Electrical noise
Isolated grounded circuits and receptacles are installed in an effort to reduce ________that can interfere with data systems and equipment.
250.32
NEC Section _____ requires that all electrodes present at any building or structure shall be bonded together to form a grounding electrode system.
250.122
NEC Table ____ is required to be used for minimum sizing of equipment grounding conductors for branch circuits
250.4(A)
Performance requirements for grounded electrical systems are provided in ____ of the NEC.
Part III
Requirement for installing AC grounding electrode conductors are provided in ______ of article 250
110.7
Section ____ of the NEC requires conductors to be free of short circuits and any grounding connections other than grounding connections specifially permitted in the NEC
250.104
Section _____ requires that metal water piping and other metal piping systems installed within or attached to buildings or structures be bonded
5/8 inch
Stainless steel rod electrodes generally must not be less than ____ in diameter.
5 feet
The NEC generally prohibits the use of an interior metal water piping system to connect grounding electrodes to the grounding electrode conductor beyond a distance of _____ from the point of entrance to the building or structure
250.102(C)(1)
The minimum size required for a supply side bonding jumper is provided in NEC table ____.
Table 250.66
The size of the grounding electrode conductor for a separate building or structure shall generally not be smaller that the sizes provided in _______
Circulating currents in the grounding path
The term ground loops is often used in the information technology sector and is best described by which of the following
#8 AWG
What minimum size aluminum equipment bonding jumper is required for a range receptacle installed in a metal box where the branch circuit is protected by a 60 ampere breaker?
3/0 AWG copper
What size copper grounding electrode conductor is required for a 6,000-ampere service supplied by ten 750 kcmil copper service conductors in parallel for each ungrounded phase conductor
