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05 changes-2
5 Hours of Credit
Article 90 Introduction
Utilities include entities that are
designated or recognized by governmental law or regulation by public
service/utility commissions.
(a) True
(b) False
Chapter 1
General
Article 100 Definitions
A component of an electrical
system that is intended to carry or control but not utilize electric
energy is a(n) _____.
(a) raceway
(b) fitting
(c) device
(d) enclosure
In a grounded system, the
conductor that connects the grounded conductor of a service, a feeder
supplying a separate building or structure, or the source of a separately
derived system to the grounding electrode is called the _____ conductor.
(a) main grounding
(b) common main
(c) equipment grounding
(d) grounding electrode
A handhole enclosure is an
enclosure identified for use in underground systems, provided with an open
or closed bottom, and sized to allow personnel to _____, for the purpose
of installing, operating, or maintaining equipment or wiring or both.
(a) enter and exit freely
(b) reach into but not enter
(c) have full working space
(d) examine visually
The Code defines a(n) _____ as one familiar with the construction and
operation of the electrical equipment and installations, and who has
received safety training on the hazards involved.
(a) inspector
(b) master electrician
(c) journeyman electrician
(d) qualified person
A(n) _____ is intended to provide
limited overcurrent protection for specific applications and utilization
equipment, such as luminaires and appliances. This limited protection is
in addition to the protection provided by the required branch circuit
overcurrent protective device.
(a) supplementary overcurrent
protective device
(b) transient voltage surge
suppressor
(c) arc-fault circuit interrupter
(d) Class A GFCI
Article 110 Requirements for Electrical
Installations
Switchboards,
panelboards, industrial control panels, meter socket enclosures,
and motor control centers in commercial and industrial occupancies that
are likely to require _____ while energized must be field marked to warn
qualified persons of the danger associated with an arc flash from
line-to-line or ground faults.
(a) examination
(b) adjustment
(c) servicing
or maintenance
(d) a, b,
or c
For equipment rated 1,200A or
more that contains overcurrent devices, switching devices or control devices,
there must be one entrance to the required working space not less than 24
in. wide and 6 ft, 6 in. high at each end of the working space. Where the
depth of the working space is twice that required by 110.26(A)(1), _____ entrance(s) are permitted.
(a) one
(b) two
(c) three
(d) none of these
Chapter 2
Wiring and Protection
Article 200 Use and Identification of
Grounded Neutral Conductors
Where
grounded neutral conductors of different wiring systems are installed in the
same raceway, cable, or enclosure, each grounded neutral conductor must be
identified by a different one of the acceptable methods in order to
distinguish the grounded neutral conductors of each system from the other.
(a) True
(b) False
Article 210 Branch Circuits
When more than one nominal
voltage system exists in a building, each ungrounded system conductor must
be identified by system. The means of identification must be permanently
posted at each branch-circuit panelboard.
(a) True
(b) False
All ungrounded (hot) conductors
from two or more branch circuits terminating on multiple devices or
equipment on the same yoke must have a means to be disconnected
simultaneously in _____ occupancies.
(a) dwelling unit
(b) commercial
(c) industrial
(d) all of these
All 15 and 20A, 125V
single-phase receptacles _____ of commercial occupancies must have GFCI
protection for personnel.
(a) in bathrooms
(b) on rooftops
(c) in kitchens
(d) all of these
The location of the arc-fault
circuit interrupter can be at other than the origination of the branch
circuit if _____.
(a) the arc-fault circuit
interrupter is installed within 6 ft of the branch-circuit overcurrent device
(b) the circuit conductors up to
the arc-fault circuit interrupter must be in a metal raceway or a cable with a
metallic sheath
(c) both a and b
(d) none of these
A receptacle outlet must be
installed in dwelling units for every kitchen and dining area countertop
space _____, and no point along the wall line can be more than 2 ft,
measured horizontally from a receptacle outlet in that space.
(a) wider than 10 in.
(b) wider than 3 ft
(c) 18 in. or wider
(d) 12 in. or wider
For the purpose of determining
the placement of receptacles in a dwelling unit kitchen, a(n) _____ countertop is measured from the connecting
edge.
(a) island
(b) usable
(c) peninsular
(d) cooking
In dwelling units, the required
wall receptacle outlet is allowed to be installed on the side or front of
the basin cabinet if no lower than _____ below the countertop.
(a) 12 in.
(b) 18 in.
(c) 24 in.
(d) 36 in.
Guest rooms or guest suites
provided with permanent provisions for _____ must have receptacle outlets
installed in accordance with all of the applicable requirements for a
dwelling unit in accordance with 210.52.
(a) whirlpool tubs
(b) bathing
(c) cooking
(d) internet access
A 15 or 20A, 125V, single-phase
receptacle outlet must be located within 25 ft of heating,
air-conditioning, and refrigeration equipment for _____ occupancies.
(a) dwelling
(b) commercial
(c) industrial
(d) all of these
Article 215 Feeders
Where the premises wiring
system contains feeders supplied from more than one voltage system, each
ungrounded (hot) conductor, where accessible, must be identified by the system.
Identification can be by _____ or other approved means. Such
identification must be permanently posted at each feeder panelboard or
similar feeder distribution equipment.
(a) color-coding
(b) marking tape
(c) tagging
(d) a, b, or c
Article 225 Outside
Branch Circuits and Feeders
A building or structure must be
supplied by a maximum of _____ feeder(s) or branch circuit(s).
(a) one
(b) two
(c) three
(d) as many as desired
Article 230 Services
Cable tray systems are
permitted to support service-entrance conductors. Cable trays used to
support service-entrance conductors can contain only service-entrance conductors _____.
(a) unless a solid fixed barrier
separates the service-entrance conductors
(b) only for under 300 volts
(c) only in industrial locations
(d) only for over 600 volts
Meter disconnect switches that
have a short-circuit current rating equal to or
greater than the available short-circuit current are permitted ahead of
the service-disconnecting means.
(a) True
(b) False
Article 240 Overcurrent Protection
Overcurrent protection for tap
conductors not over 25 ft is not required at the point where the
conductors receive their supply providing the _____.
(a) ampacity of the tap conductors
is not less than one-third of the rating of the overcurrent device protecting
the feeder conductors being tapped
(b) tap conductors terminate in a
single circuit breaker or set of fuses that limit the load to the ampacity of
the tap conductors
(c) tap conductors are suitably
protected from physical damage
(d) all of these
For industrial installations
only, a tap can be made without overcurrent protection when the
transformer secondary conductors have a total length of not more than _____ . The tap conductors must have an ampacity not less
than the secondary current rating of the transformer and the sum of the
ratings of the overcurrent devices.
(a) 8 ft
(b) 25 ft
(c) 35 ft
(d) 75 ft
Overcurrent protection devices
are not permitted to be located _____.
(a) where exposed to physical damage
(b) near easily ignitible
materials, such as in clothes closets
(c) in bathrooms of dwelling units
(d) all of these
Article 250 Grounding and Bonding
For grounded systems,
electrical equipment and wiring and other electrically conductive material
likely to become energized are installed in a manner that creates a
permanent, low-impedance circuit capable of safely carrying the maximum
ground-fault current likely to be imposed on it from where a ground fault
may occur to the _____.
(a) ground
(b) earth
(c) electrical supply source
(d) none of these
Grounding and bonding
conductors cannot be connected by _____.
(a) pressure connections
(b) solder
(c) lugs
(d) approved clamps
For a single separately derived
system, the grounding electrode conductor connects the grounding electrode
to the grounded neutral conductor of the derived system at the same point
on the separately derived system where the _____ is installed.
(a) metering equipment
(b) transfer switch
(c) bonding jumper
(d) largest circuit breaker
A grounding
electrode at a separate building or structure is required where one
multiwire branch circuit serves the building or structure.
(a) True
(b) False
Where none of the items in 250.52(A)(1)
through (A)(6) are present for use as a grounding electrode, one or more
of the following must be installed and used as the grounding electrode:
_____.
(a) a ground ring
(b) rod and pipe electrodes or
plate electrodes
(c) local metal underground systems
or structures
(d) any of these
The metal frame of a building
where one of the four Code-prescribed methods of making an earth
connection has been met may serve as part of the grounding electrode
system.
(a) True
(b) False
The
supplementary electrode allowed by the Code is different from a
supplemental electrode, and is allowed to be connected to the equipment
grounding (bonding) conductors but cannot be used in place
of an
effective ground-fault current path for electrical equipment.
(a) True
(b) False
An exothermic or irreversible
compression connection to fireproofed structural metal is required to be
accessible.
(a) True
(b) False
Regardless of the voltage of
the electrical system, the electrical continuity of non-current carrying metal
parts of equipment, raceways, and other enclosures in any hazardous
(classified) location as defined in Article 500 must be ensured by
any of the methods specified in 250.92(B)(2) through (B)(4). One or more
of these _____ methods must be used whether or not supplementary equipment
grounding (bonding) conductors are installed.
(a) grounded
(b) securing
(c) sealing
(d) bonding
The metal water pipe system of
a building or structure is not required to be bonded to the separately
derived system neutral terminal where the metal frame of the building or
structure is used as the grounding electrode for the separately derived
system and is bonded to the metal water piping in the area served by the
separately derived system.
(a) True
(b) False
Liquidtight flexible metal
conduit (LFMC) up to ½ in. trade size can be used as the equipment
grounding (bonding) 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 when the conduit
is not installed for flexibility.
(a) 15A
(b) 20A
(c) 30A
(d) 60A
Conductors with insulation that
is _____ cannot be used for ungrounded or grounded neutral conductor.
(a) green
(b) green with one or more yellow
stripes
(c) a or b
(d) white
An equipment bonding jumper
must be used to connect the grounding terminal of a grounding-type
receptacle to a grounded box. Where the box is surface-mounted,
direct metal-to-metal contact between the device yoke and the box can be
permitted to ground the receptacle to the box.
(a) True
(b) False
Contact devices or yokes
designed and listed as self-grounding are permitted in conjunction with
the supporting screws to establish the grounding circuit between the
device yoke and flush-type boxes.
(a) True
(b) False
Chapter 3
Wiring Methods and Materials
Article 300 Wiring Methods
Cables laid in wood notches
require protection against nails or screws by using a steel plate at least
_____ thick, installed before the building finish is applied. A thinner
plate that provides equal or better protection may be used if listed and
marked.
(a) 1/16 in.
(b) 1/8 in.
(c) 1/2 in.
(d) none of these
When unable to maintain the
minimum required distance from the edge of a wood framing member when
installing a cable or nonmetallic raceway parallel to framing members, the
cable or raceway shall be protected from penetration by screws or nails by
a steel plate or bushing at least _____ and of appropriate length and width
to cover the area of the wiring. A thinner plate that provides equal or
better protection may be used if listed and marked.
(a) ¼ inch thick
(b) 1/8 inch thick
(c) 1/16 inch thick
(d) 24 gauge
Nonmetallic raceways, cable
trays, cablebus, auxiliary gutters, boxes,
cables with a nonmetallic outer jacket and internal metal armor or jacket,
cable sheathing, cabinets, elbows, couplings, nipples, fittings, supports
and support hardware must be made of material _____.
(a) listed for the condition
(b) approved for the condition
(c) both a and b
(d) either a or b
Electrical
wiring within the cavity of a fire-rated floor-ceiling or roof-ceiling
assembly cannot be supported by the ceiling assembly or ceiling support
wires. An independent means of support must be provided which _____.
(a) is
permitted to be attached to the ceiling assembly
(b) cannot
be attached to the ceiling assembly
(c) can be
nonmetallic material
(d) none of
these
Article 310 Conductors
Where _____ conductors are run
in separate raceways or cables, the same number of conductors must be used
in each raceway or cable.
(a) parallel
(b) control
(c) communication
(d) aluminum
Each current-carrying conductor
of a paralleled set of conductors must be counted as a current-carrying conductor
for the purpose of applying the adjustment factors of 310.15(B)(2)(a).
(a) True
(b) False
Article 312 Cabinets, Cutout Boxes, and
Meter Socket Enclosures
Where raceways or cables enter
above the level of uninsulated live parts of an enclosure in a wet
location, a _____ must be used.
(a) fitting listed for wet locations
(b) explosionproof seal-off
(c) fitting listed for damp locations
(d) insulated fitting
Article 314 Outlet, Device, Pull and
Junction Boxes, Conduit Bodies, Fittings and Handhole Enclosures
When counting the number of
conductors in a box, a conductor running through the box with an unbroken
loop not less than twice the minimum length required for free conductors
in 300.14 is counted as _____ conductor(s).
(a) one
(b) two
(c) zero
(d) none of these
Plaster,
drywall, or plasterboard surfaces that are broken or incomplete around
boxes employing a flush-type cover or faceplate must be repaired so there
will be no gaps or open spaces larger than _____ at the edge of the box.
(a) ¼ in.
(b) ½ in.
(c) 1/8 in.
(d) 1/16 in.
Underground raceways and cable
assemblies entering a handhole enclosure must extend into the enclosure,
but they are not required to be _____.
(a) bonded
(b) insulated
(c) mechanically connected to the
handhole enclosure
(d) below minimum cover
requirements after leaving the handhole
Handhole enclosure covers mustrequire the use of tools to
open, or they must weigh over _____. Metal covers and other exposed
conductive surfaces must be bonded to an effective ground-fault
current path.
(a) 45 lb
(b) 100 lb
(c) 70 lb
(d) 200 lb
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