Colorado Journeyman practice test 1

100 ft of PVC conduit installed above grade outdoors where there is a winter temperature of -10 F and a summer temperature of 110 F would have a change in length of __________ inches. 300.7(B) & 352.44

4.87 inches

A 115-volt, single-phase, 3 HP motor has a nameplate current rating of 36.5 amperes. What is the minimum ampacity permitted by Code for the branch-circuit conductors? 430.22

42.5 amperes

A 1,600 sq. ft. dwelling unit contains 74 receptacle outlets including 14 receptacles in the kitchen, laundry and dining areas. Using the standard calculation, what is the computed feeder load for lighting, receptacle, small appliance and laundry loads in volt-amperes for this dwelling? Article 220

5,205 volt-amperes

A 10kVA, single-phase, 480/240-volt transformer is installed with the secondary connected 240-volt, two-wire. There is no overcurrent device on the secondary side. What is the minimum size permitted by Code for the secondary conductors if the primary is protected with a 30 amperes circuit breaker? 240.4

60 amperes

What is the minimum size THWN aluminum service conductor permitted by Code to supply a 400-ampere, 120/240-volt service to a single family dwelling? 230.90(A) 310.15(B)(7)(1)

600 kcmil

The minimum ampacity of the circuit to supply a 12.0 kW electric furnace with a 1/3-HP motor in a dwelling unit at 240 volts would be? 424.3

67 amperes

Three-inch intermediate metal conduit has a total square inch area of __________ sq. inches. "Conduits" Table 4, Ch. 9

7.922 sq. inches

What is the adjustment factor that must be applied to 4 pieces of 12/2 MC cable used to supply 240-volt single-phase loads bundled together throughout their 50-foot home run? 310.15

70 percent

Given a transformer with a primary of 1000 volts or less and rated primary amperage of 5 amps, the rating of the overcurrent protection device shall not exceed __________? 450.3(B)

8 amperes

What is the largest inverse time circuit breaker permitted by code to be used first for the branch-circuit, short-circuit and ground-fault protection to protect a 25 HP three-phase, 480-volt, squirrel-cage induction motor, code letter F. 430.52

90 amperes

Branch-circuit conductors within 3 inches of a ballast in the ballast compartment shall have an insulation temperature rating of not less than __________ Celsius. 410.24 & 410.68

90 degrees Celsius

A two-wire receptacle must be replaced in the bathroom of a dwelling unit. The Code require that this receptacle be __________. The receptacle box does not contain an equipment grounding conductor. 250.130(C) & 406.4(D)

A GFCI protected receptacle

The definition of a forming shell as used in a swimming pool is best described by which of the following? 680.2

A structure designed to support a wet-niche luminaire assembly.

What is the maximum size time-delay fuse permitted for a No. 1 AWG copper THHN motor feeder (sized by section 430.24) short-circuit and ground-fault protection for the following five 480-volt, 3-phase, squirrel-cage, induction motors, marked code letter F: one 10 HP, two 15 HP, and two 20 HP. Article 430 IV & V 430.62(A) 430.24 430.6(A) 430.250(A)

125 amperes

The overcurrent protection device on the primary side of a transformer operating at less than 1000 volts, but more than 9 amperes, must be set at not more than __________ percent of the transformer's rated primary current? 450.3(B)

125 percent

The feeder demand load for four 14kW residential ranges is __________? Table 220.55

18.7 kilowatts

A new recreational vehicle park is being constructed with 100 campsites. What percentage of the sites must have 50-ampere 120/240-volt supply installed? 551.71

20 percent

A 120-volt circuit is installed to provide power to the pump for an LP-Gas filling station located at a gasoline dispensing service station. The LP-Gas will be dispensed into portable tanks as used in barbecue grills. Which of the following best describes Code requirements for the disconnecting means for this circuit? 514.11

The disconnect must also disconnect the grounded conductor.

In a dwelling, which of the following built-in appliances can be cord and plug connected? 422.16

Dishwasher, Garbage disposal, and Trash compactor

What is the allowable ampacity for a 30 AWG conductor used as part of the control wiring that is a part of a permanent amusement attraction? Assume the wire insulation is rated at 75 degrees C. 522.22

.5 amperes

How many telephone outlets are required by the code for new dwellings? Article 800

1

When supporting NMC parallel to framing members, such as joists, rafters, or studs, how close to the nearest edge can it be installed? 300.4

1 1/4 inches

The minimum size of the service entrance conductors for a dwelling unit with five 2-wire branch circuits is __________. 230.42(A)(1)or(2)

100 amperes

What is the maximum permitted cord- and plug-connected load to a 15-ampere receptacle? 210.21(B)(2)

12 amperes

Armored cable is required to have a fitting to protect the conductors from abrasion. A __________ shall be provided between the conductors and the armor. 320.40

Approved insulating bushing

Which of the following is not an acceptable use for flexible cords? 400.8

Attached to building surfaces.

Which cable type would be permitted to be used as a substitute for BLX? 830.25 Table 830.154(B)

BMR, CMP, & CL3P

"A __________ shall be installed where cables emerge from raceway used for mechanical support or protection in accordance with 300.15(C)." 760.3(K)

Bushing

Remote-control circuits to safety-control equipment shall be classified as Class __________ regardless of voltage, if the failure of the equipment to operate introduces a direct fire or life hazard. 725.31

Class 1

"A unit of an electrical system that carries or controls electric energy as its principle function," is the definition of a _____________. Article 100 part I

Device

The motor overload unit for a single-phase motor fed from an underground 2-wire, single-phase AC source will be placed in the __________ conductor. 430.37

Either phase or neutral.

"Power production, distribution, and utilization equipment and facilities, such as electric utility systems that deliver electric power to the connected loads, that are external to and not controlled by an interactive system," is called _____________. Article 100-I

Electric power production and distribution network

"The conductive path(s) that provides a ground-fault current path and connects normally non-current-carrying metal parts of the equipment together and to the system grounded conductor or to the grounding electrode conductor or both," is called a __________. Article 100

Equipment Grounding Conductor

The conductive path(s) installed to connect normally non-current carrying metal parts of equipment together and to the system grounded conductor, grounding-electrode conductor or both, is called the ___________? Article 100

Equipment grounding conductor

"Connected to the ground or to a conductive body that extends the ground connection." is considered to be _____________. Article 100-I

Grounded

In general, Class 2 and Class 3, remote control and signaling circuit wiring shall not be secured to __________. 725.133 725.143

Raceways

Transformers and transformer vaults shall be __________ to qualified personnel for inspection and maintenance. 450.13

Readily accessible

A multiwire branch circuit must be provided with a means that will disconnect all un-grounded conductors __________. 210.4(B)

Simultaneously

A 120/240-volt, single-phase, 200-ampere service is installed in a building. The service conductors extend into a metal wireway and are then tapped to supply two main disconnecting means each rated 100 amperes. Which of the following best describes Code requirements for the un-spliced main bonding jumper connection from the equipment-grounding conductor to the service equipment enclosure? 250.24(B)

The jumper must be connected to both of the disconnects.

Which of the following is not required to be bonded on a hot tum installation? 680.42 (B)

The metal bands used to secure the wooden staves of the tub.

A single-phase, 3 kVA, 480-volt to 120-volt transformer is installed to supply power to a piece of industrial equipment. The transformer is protected on the primary side with 10-ampere fuses. No secondary conductor protection has been provided. Which of the following best describes Code requirements for the secondary conductors of this transformer? 240.4

They must be sized at a minimum of 40 amperes.

Each patient be location in a health care facility shall be supplied by at least __________ branch circuits. 517318(A)

Two

Each kitchen is required to have a minimum of _____________ small appliance branch circuit(s). 210.11(C)(1)

Two branch circuits

What is the minimum ampacity permitted for the feeder to supply the following group of 230-volt, single-phase, squirrel-cage induction motors: one 10 HP, one 7.5 HP, one 5 HP, and one 1 HP? 430-24

143 amperes

Sign transformers secondary circuit voltage shall not exceed __________ volts. 600.23(C)

15,000 volts

What is the voltage drop for a three-phase, 3-wire, 240-volt circuit with a load of 5 HP located 110 ft from the panel and fed using No. 8 AWG copper THHN? Table 430.250 (VD = I X R X sq-root of 3).

2.25 volts

In one- or two- family dwellings, the primary protector bonding conductor or grounding electrode conductor shall not exceed __________. 800.100(A)(4)

20 feet

What is the maximum number of No. 14 AWG THHN copper conductors allowed in 3/8-inch flexible metal conduit, when using external clamp-type fittings? 348.22

4 conductors

Sills or curbs in transformer vaults, shall have a minimum height of __________. 450.43(B)

4 inches

Liquidtite Flexible Metal Conduit must be supported at intervals not exceeding __________ ft. 350.30

4-1/2 feet

A "park trailer" is defined as "a unit built on a single chassis mounted on wheels and has a gross trailer area not exceeding __________ sq. ft. in set up mode." 552.2

400 sq. ft.

Where the number of current-carrying conductors in a raceway equals 10, the allowable ampacities shall be reduced to __________ percent of the values listed in Tables 310.15(B)(16) through 310.15(B)(19).

50 percent

A mobile home park as 26 mobile homes each with a computed load of 22,000 volt-amperes. What is the ampacity of the service conductors required to serve this park? 550.31

572 amperes

A bonding bar near the service equipment enclosure, meter enclosure or raceway for service conductors for intersystem bonding shall be connected to the equipment grounding conductors in the service equipment enclosure with a minimum __________. 250.92 & 250.94

6 AWG copper conductor

An outlet for laundry equipment is to be installed within at least _____________ of the intended location of the appliance. 210.50(C)

6 feet

Nonmetallic-sheathed cable installed in an attic, which is accessible only by a scuttle hole, on top of the floor joists shall be located a minimum of __________ ft from the edge of the scuttle hole unless procted by substantial guard strips. 320.23

6 feet

Splices and taps in surface nonmetallic raceways shall not fill the raceway at the point of the splice or tap to more than __________. 388.56

75 percent

A ground rod must be a minimum of __________ ft in length. 250.52(A)(5)

8 feet

When passing over roofs, coaxial cables shall have at least __________ ft of clearance from all points on the roof. 820.44(B)

8 feet clearance

How many No. 4/0 THW copper conductors may be installed in a 2-1/2-inch EMT conduit nipple six inches long installed between a panel and a wireway? Ch. 9 Note 4 Table 4 & 5

9 conductors

Sign transformers, current transformers, and transformers used for power-limited fire protection signaling circuits are covered by Article 450.

False, these are the exceptions to this article

A listed package spa assembly is purchased with a factory installed ground-fault circuit-interrupter on the factory supplied 15 ft long cord. This unit is to be cord- and plug-connected indoors to a wall receptacle located 10 ft from the inside of the spa assembly. Which of the following complies with code requirements for this cord and receptacle? 680.43(A)(3)

GFCI protection is required for the receptacle even though the cord came with built-in GFCI protection.

Mandatory rules of the NEC are characterized by the use of the word "shall". Explanatory materials are in the form of __________. 90.5(C)

Informational notes

"A device that provides a means for connecting bonding conductors for communication systems to the grounding electrode system," is called _____________. Article 100-I

Intersystem bonding termination

A wet bar is installed in the family room area of a dwelling unit with a wall receptacle installed within 6 feet of this wet bar. Which of the following best describes Code requirements for installation of this receptacle? 210.8

It must have GFCI protection even though it is in the family room

A 125-volt, 20-ampere, single=outlet type, wall receptacle is to be installed in the bathroom of a drug store. Which of the following best describes Code requirements for the installation of this receptacle? 210.8(B)(1)

It must have GFCI protection.

A 240/120-volt three-wire feeder is to be installed underground from a dwelling unit to a detached garage on the same property. The feeder will be fed from a 90- ampere circuit breaker in the dwelling unit panelboard and installed in rigid PVC conduit to the garage. Which of the following best describes Code requirements for installation of this feeder? 225.31

It must terminate in not more than sex disconnecting means.

A branch circuit that consists of two of more un-grounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each un-grounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system is called __________. Article 100-I

Multiwire branch circuit

Which of the following is not an approved fixed wiring method for a place of assembly? 518.4

NM Cable

A feeder, for four three-phase motors, is installed in rigid non-metallic conduit. The feeder consists of one set of 2/0 AWG THHN Aluminum conductors protected by a 150-ampere circuit breaker. What is the minimum size aluminum equipment-grounding conductor required? 250.122

No. 4 AWG aluminum

The grounding-electrode conductor of a grounded 400-ampere AC system, when connected to a rod or pipe electrode and which is the sole connection to the grounding electrode, is permitted to be a __________ wire. 250.66(A)

No. 6 AWG copper

Which type of cable is permitted to be used as a substitute for OFCR? 770.154(B)

OFCP

A dwelling unit kitchen has a wall counter top which is six feet wide. The minimum number of receptacles required for this counter top is? 210.52(C)(1)

Two counter top receptacles

How many outdoor receptacles are required at a dwelling unit? 210.52 (E)

Two outdoor receptacles

By definition, electronic computer processing equipment would be defined as _____________? Article 100

Utilization equipment

"The greatest root-mean-square difference of potential between any two conductors of the circuit concerned" is the __________. Article 100-I

Voltage.

When installed outdoors, dry-type transformers shall have a __________. 450.21 & 450.22

Weatherproof enclosure.

A raceway is installed in a wet location above grade, the interior of the raceway shall be considered to be a(n) __________. 300.9

Wet location

A listed exposed work cover shall be permitted to be the grounding and bonding means when the device is attached to the cover with at least two fasteners that are permanent or have a thread locking or screw locking means and when cover mounting holes __________. 250.146(A)(2)

are on the flat non-raised portion of the cover.

All 125-volt, single-phase, 15- and 20-ampere receptacles installed in areas where electrical diagnostic equipment, electrical hand tools, or portable lighting equipment are to be used shall __________. 511.12

be of the GFCI for personnel type