Jounreyman Exam
Determine the MINIMUM trade size electrical metallic tubing (EMT) required to enclose eight (8) size 6 AWG copper conductors with THHW insulation, when installed in a 50 foot conduit run.
1 1/4"
In indoor areas where walls are frequently washed, such as laundries or car washes, metallic conduit and metallic panelboards shall be mounted with a MINIMUM _____ space between the wall and conduit or panelboard when the equipment is installed exposed.
1/4"
What is the MINIMUM size wire type equipment grounding conductor for a 50 ampere branch circuit as required by the NEC
10
Disregarding exceptions, all 3-phase, 4-wire, 480Y/277 volt, electrical services, require ground-fault protection for each service disconnecting means when rated for at LEAST _____ or more.
1000A
Isolating devices or equipment disconnecting means of solar photovoltaic systems shall be installed in circuits connected to equipment at a location within the equipment, or within sight and within at LEAST ______ of the equipment.
10ft
Liquidtight flexible metal conduit (LFMC) shall be securely fastened WITHIN _____ of each box or other conduit termination.
12 in
Determine the MAXIMUM allowable current-carrying capacity of four (4) size 1/0 AWG THW copper current-carrying conductors installed in a common raceway with an ambient temperature of 86 degrees F
120
A 208-volt, 3-phase, 50 hp, squirrel-cage, continuous-duty, ac motor has a full-load running current rating of
143
Information technology equipment shall be permitted to be connected to a branch circuit by a listed power-supply cord having a length NOT to exceed
15 ft
What is the MAXIMUM distance permitted between supports of straight runs of threaded trade size 2 in. rigid metal conduit (RMC)?
16 ft
Determine the conductor ampacity given the following related information: conductors are size 500 kcmil copperconductor insulation is THWNeight (8) current-carrying conductors are in the racewayambient temperature is 125 deg. Fconduit length is 50 feetinstallation is a wet location
178.2 Size 500 KCMIL THWN copper ampacity before derating = 380 amperes 380 amperes x .67 (temp. correction) x .7 (adjustment factor) = 178.22 amperes
Before demand factors are taken into consideration for commercial buildings, general-purpose receptacle loads are to be computed at NOT less than _____ per outlet
180VA
For the purpose of determining conductor fill in a device box, a single-pole switch and/or a three-way switch is counted as equal to _____ conductor(s), based on the largest conductor connected to the switch.
2
In guest rooms of hotels, motels, and sleeping rooms of dorms a MINIMUM of _____ general-purpose receptacles installed in the room is/are required to be readily accessible.
2
Snap switches rated __ or less directly connected to aluminum conductors shall be listed and marked CO/ALR.
20A
Determine the MAXIMUM number of size 1 AWG XHHW compact conductors permitted in a trade size 3 in., rigid Schedule 40 PVC conduit more than 24 inches long.
21
A general-use snap switch with an ampere rating of NOT less than _____ shall be permitted as the motor controller for a single-phase 2 hp, 240-volt motor.
24A
The NEC defines a continuous load to be a load where the maximum current on the circuit is expected to continue for at LEAST____ hours or more.
3
Where exceptions are not applicable, when a feeder supplies a continuous load of 240 amperes, the overcurrent protection device protecting this circuit shall have a rating of at LEAST
300A
Bends in PVC conduit shall not exceed __________ degrees between pull points
360
An intersystem bonding termination shall be provided for the communications systems at an accessible location at the service equipment. It shall be an aluminum or copper busbar not less than ¼ in. thick x 2 in. wide and be of sufficient length to accommodate at LEAST _____ terminations for communications systems in addition to other connections.
4
Determine the MAXIMUM number of size 14 AWG THHN conductors permitted to be installed in a trade size 3/8 in. flexible metal conduit (FMC) that contains a bare size 14 AWG grounding conductor, when the FMC has external fittings.
4
Armored cable (Type AC) installed horizontally through wooden or metal framing members is considered supported where the support doesn't exceed _____ intervals.
4 1/2 ft
Where a trade size 1/2 in. rigid metal conduit (RMC) is installed in a Class I location and a 1/2 in. conduit seal is required, the MINIMUM thickness of the sealing compound shall NOT be less than
5/8"
Alternating-current or direct-current general-use snap switches may be used for control of inductive loads not exceeding __ percent of the ampere rating of the switch at the applied voltage.
50
Infrared commercial and industrial heating appliances shall have overcurrent protection NOT exceeding
50A
The service disconnecting means for each electrical service shall consist of NOT more than _____ switches or circuit breakers, mounted in a single enclosure or in a group of separate enclosures.
6
Type MC cable installed horizontally through wooden or metal framing members are considered secured and supported where such support does not exceed __ -ft intervals.
6
All 125-volt, single-phase, 15- or 20-ampere receptacle outlets installed within at LEAST _____ of the outside edge of a dwelling unit bathtub or shower stall require GFCI protection
6 ft
When connecting to luminaires, trade size 3/8 in. flexible metal conduit (FMC) is permitted to enclose tap conductors, provided the length of the FMC does NOT exceed _____ .
6 ft
What is the MAXIMUM overcurrent protection allowed for the protection of resistance-type electric space heating equipment?
60
Conduit or tubing nipples not over 24 inches in length may be filled to a MAXIMUM of _____ of their cross-sectional area.
60%
A single-phase, 240-volt, 15 kVA standby generator may be loaded to a MAXIMUM of _____ per line.
62.5A
A single-phase, 125-volt receptacle installed to serve a washing machine in the laundry room of a dwelling unit must be installed within at LEAST ______ of the intended location of the appliance.
6ft
The minimum radius of a field bend on trade size 1 1/4" RMC is ________ in.
8
Where a pull box to be installed will contain conductors of size 4 AWG and larger, and a straight pull of the conductors is to be made, the length of the box shall NOT be less than ____times the trade diameter of the largest conduit entering the box.
8
Direct-buried conductors emerging from grade shall be protected by raceways or covers up to at LEAST _____ above finished grade.
8 ft
You have determined a conductor has a computed allowable ampacity of 75 amperes. What is the MAXIMUM standard ampere rating of the overcurrent protection device the NEC permits to protect this circuit where this is not a motor circuit or part of a multioutlet branch circuit supplying more than one receptacle?
80
When ambient temperature is not a factor, a size 8 AWG single copper conductor with type FEPB insulation, installed in free air, will have a MAXIMUM allowable ampacity of
80A
Where IMC enters a box, fitting, or other enclosure, __ shall be provided to protect the wire from abrasion unless the design of the box, fitting, or enclosure affords equivalent protection
A bushing
Type NM and Type NMC cables shall be permitted in __ , except as prohibited in 334.12. A. one- and two-family dwellings and their attached/detached garages and storage buildings B. multifamily dwellings permitted to be of Types Ill, IV, and V construction C. other structures permitted to be of Types Ill, IV, and V construction D. All of the above
All of the above
IMC shall be secured ______. A. By fastening with 3 ft of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination B. Within 5 ft of a box or termination fitting when structural members do not readily permit the raceway to be secured within 3 ft of the termination C. Except when the IMC is within 3 ft of the service head for an above-the-food termination of a mast D. Any of these
Any of these
The ampacity adjustment factors of 310.15(B)(3)(a) shall not apply to conductors installed in surface metal raceways where the A. cross-sectional area exceeds 4 sq in. B. current-carrying conductors do not exceed 30 in number C. total cross-sectional area of all conductors does not exceed 20 percent of the interior cross-sectional area of the raceway D. Any of these
Any of these
Which of the following listed types of batteries is NOT permitted for use as a source of power for emergency systems?
Automotive
LFMC shall not be required to be secured or supported where fished between access points through __ spaces in finished buildings or structures and supporting is impractical.
Concealed
A device or group of devices that serves to govern, in some predetermined manner, the electric power delivered to the apparatus to which it is connected to, is recognized as a _____ in the NEC
Controller
General-use __ switches shall be used only to control permanently installed incandescent luminaires unless listed for control of other loads and installed accordingly.
Dimmer
A disconnect switch enclosure installed in a Class II, Division 2 location shall be listed as
Dust tight
__ 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
____ is a raceway of circular cross section made of a helically wound, formed, interlocked metal strip.
FMC
Conductors larger than that for which the metal wireway is designed can be installed in any metal wireway.
False
Type NM cables shall not be used in one- and two-family dwellings exceeding three floors above grade.
False
Type UF cable can be used for service conductors.
False
ENT is composed of a material resistant to moisture and chemical atmospheres, and is
Flame retardant
Horizontal runs of RMC supported by openings through __ at intervals not exceeding 10 ft and securely fastened within 3 ft of termination points shall be permitted.
Framing members
Conductors rated at a temperature __ than the listed temperature rating of PVC conduit shall be permitted to be installed in PVC conduit, provided the conductors are not operated at a temperature above the raceway's listed temperature rating.
Higher
Class _____ hazardous locations are those in which flammable liquid-produced vapors, or combustible liquid-produced vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures.
I
Class _____ locations are those that are hazardous because of the presence of easily ignitible fibers or where materials producing combustible flyings are handled, but in which such fibers/flyings are not likely to be in suspension in the air in quantities sufficient to produce ignitible mixtures.
III
A multioutlet assembly shall not be installed
In hoistways, where subject to severe physical damage, and where subject to corrosive vapors
___ is a raceway of circular cross section having an outer liquidtight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core.
LFMC
Type __ cable is a factory assembly of two or more insulated conductors, with or without associated bare of covered grounding conductors, under a nonmetallic jacket.
TC
Conductors with ______ insulation have a greater ampacity when used in a dry location compared to when used in a wet location.
THHW
When determining the required ampacity of the branch-circuit conductors to supply a 3-phase, continuous-duty ac motor, current values given on _____ shall be used.
Table 430.250 of the NEC
Fixture wires shall not be used for branch-circuit wiring, except as permitted in other articles of the Code.
True
Horizontal runs of IMC supported by openings through framing members at intervals not exceeding 10ft and securely fastened within 3 ft of terminations shall be permitted.
True
PVC conduit shall be permitted for exposed work where subject to physical damage if identified for such use.
True
Running threads shall not be used on IMC for connection at couplings
True
Type NM cable shall closely follow the surface of the building finish or running boards when run exposed.
True
Type UF cable is permitted to be used for inside wiring.
True
When grouping conductors of switch loops in the same raceway, it is not required to include a grounded conductor.
True
When metal wireways are used, the number of conductors or cables that can be enclosed, and their ampacity, shall comply with 376.22(A) and (B).
True
Where RMC enters a box, fitting, or other enclosure, __ shall be provided to protect the wire from abrasion, unless the design of the box, fitting, or enclosure affords equivalent protection.
a bushing
Joints between lengths of ENT, couplings, fittings, and boxes shall be made by
an approved method
Where a size 4 AWG or larger conductor enters a panelboard, which of the following must be provided?
an insulated bushing
LFMC shall be supported and secured
at intervals not exceeding 4 1/2 ft
The purpose of an intersystem bonding termination is to provide a means for connecting _____ to the grounding electrode system.
bonding conductors for communications systems
Flexible cords and flexible cables shall be protected by __ where passing through holes in covers, outlet boxes, or similar enclosures.
bushings or fittings
Each run of cable tray shall be __ before the installation of cables.
completed
All motors shall be considered as _____ unless the nature of the apparatus it drives is such that the motor will not operate continuously.
continuous duty
The use of LFMC shall be permitted for
direct burial where listed and marked for the purpose, exposed work, concealed work
ENT and fittings can be __ , provided fittings identified for this purpose are used.
encased in poured concrete
Cable trays shall be __ except as permitted by 392.18(D).
exposed and accessible
Metal wireways shall be permitted for
exposed work and/or wet locations if listed for the purpose
Where practicable, contact of dissimilar metals shall be avoided in an IMC raceway installation to prevent the possibility of
galvanic action
Metal wireways can pass transversely through a wall
if the length passing through the wall is unbroken
The ampacity of a conductor is defined by the NEC® to be the maximum current, in amperes, a conductor can carry continuously under the conditions of use without exceeding __
its temperature rating
Threadless couplings and connectors used with RMC in wet locations shall be
listed for wet locations
Threadless couplings approved for use with IMC in wet locations shall be
listed for wet locations
Three-way and four-way switches shall be wired so that all switching is done
only in the ungrounded circuit conductor
Materials such as straps, bolts, and so forth, associated with the installation of RMC in wet locations shall be
protected against corrosion by corrosion-resistant materials or corrosion resistant
Materials such as straps, bolts, screws, and so forth, which are associated with the installation of IMC in wet locations shall be
protected against corrosion by corrosion-resistant materials or corrosion resistant
Galvanized steel and stainless steel EMT, elbows, couplings, and fittings can be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where
protected by corrosion protection and approved as suitable for the condition
Cable __ made and insulated by approved methods can be located within a cable tray provided they are accessible, and do not project above the side rails where the splices are subject to physical damage
splices
Which of the following is permitted in the dedicated electrical space above an indoor installed 3-phase, 480Y/277-volt panelboard?
sprinkler protection
A listed _____ shall be installed in or on all emergency systems switchboards and panelboards
surge protective device (SPD)
Cut ends of FMC shall be trimmed or otherwise finished to remove rough edges, except where fittings
thread into the convolutions
The cut ends of PVC conduit shall be __ to remove the burrs and rough edges
trimmed
Where the motor controller also serves as a disconnecting means, it shall open all _____ conductors to the motor.
ungrounded
The interior of enclosures or raceways installed underground shall be considered as a _____ location.
wet
Field bends in PVC conduit shall be made only
with bending equipment identified for the purpose