Colorado Journeyman practice test 2
As used int he NEC for transformer locations, the term Fire Resistant shall meet a minimum rating of ___________. 450.13 450.21 450.27
1 hour
A 3 ft piece of liquidtight flexible metal conduit is installed in a service entrance raceway which contains 4 pieces of 500 kcmil copper for a 400-ampere 480-volt wye service. A bonding jumper will be installed on the outside of this liquidtight flexible metal conduit. What is the minimum size of this bonding jumper? 230.43 Item (15) 250.102(A), (B), (C), & (E)
1/0 copper
Where electrical wiring is installed at a motor fuel dispensing facility below the surface, which is classified as Class I, Division 1 location, a sealing fitting shall be installed within ___________ of the point were it emerges above grade. 514.9
10 feet
Fixed electric space heating loads shall be computed at ___________ percent of the total connected load. 220-III, Annex D
100 percent
When a continuous-duty motor rated 1 HP or more, but not marked with service factor of temperature rise, is protected by a separate overload device, the device shall be selected to trip at no more than ___________ percent of the motor nameplate current rating. 430, Part III 430.32(A)(1)-(A)(4)
100 percent
When calculating the capacity for an optional standby system using an automatic transfer switch the standby source shall be capable of supplying ___________. 702.4(B)(2)(a)
100 percent of the full load transferred.
The network-powered broadband communications cable grounding terminal shall be bonded to the metal frame or available grounding terminal of the mobile home with copper grounding conductor no smaller than ___________, where the mobile home is supplied cord and plug. 830.1(B)
12 AWG copper
Service cable shall be secured within ___________ of a weather head and meter socket. 230.51 paragraph (A)
12 inches
A 75 kVA, 480/208-volt, three-phase transformer with four-wire secondary, shall be provided with a maximum primary overcurrent protective device not exceeding: 450.3(B) 240.6
125 amperes
Determine the allowable ampacity of 13 No. 12 AWG THHN conductors in a raceway, when passing through an area where the ambient temperature is 40 degrees Celsius. 310.15(B)
13.65 amperes
What is the instantaneous trip breaker permitted by Code to be used first for the branch-circuit short-circuit and ground-fault protection to protect a 10 HP, three-phase, 208-volt, squirrel-cage induction motor, with no code letter. 430.52(C)(1)
150 amperes
Given a transformer with a 100 volt or less primary and an amperage of less than 9 amperes, it shall be permissible to use overcurrent protection device set at what percentage? 450.3(B)
167 percent
For purposes of receptacle spacing, the Code requires that a wall space shall be considered to be any wall space ___________ ft or greater, including a short wall space connected at the baseboard to another wall section. 210.52(A)(2)(1)
2 Feet
The minimum mounting height above finished grade for an outdoor mobile home disconnecting means is not less than ___________ to the bottom of the enclosure. 550.32(F)
2 feet
What size main bonding jumper is required to bond a separately derived system supplied from a 225-kVA 480-volt delta 120/208-volt wye transformer where the secondary conductors are parallel 350 kcmil THHN supplying a 600-ampere distribution panel? 250.20(D) 250.30(A)(1) 250.28(A)-(D) Table 250.102(C)(1)
2/0 copper
A continuous-duty 3 HP 208-volt single-phase motor, with a nameplate current rating of 18.7 amperes and a service factor of 1.15 is protected by a separate overload device. The overload should trip at no more than ___________ amperes. 430 Part III 430.32
23.38 amperes
Where connected to a 30 ampere branch circuit supplying one receptacle, the receptacle shall have an ampere rating equal to 30 amperes and a maximum load of ___________ amperes. Article 200 Part II 210.21(B)(2)
24 Amperes
A raceway contains 9 No. 12 AWG THHN conductors from a 120/240 volt, single-phase panelboard. The conductors supply three 120/240 volt, three-wire circuits made up of phases A and B and a grounded conductor (neutral). What is the allowable ampacity for each of the No. 12 AWG conductors? 310.15(B)(16)-(21)
24 amperes
Transformers shall be provided with a nameplate giving the name of the manufacturer, rated kVA, frequency, primary and secondary voltages and impedance of transfomers ___________ kVA and larger. 450.11
25 kilovolt-amperes
The following conductors and devices are to be contained within one metal box with two cable clamps. Two pieces of 12/2 NMC w/g, one piece of 14/2 NMC w/g, one receptacle connected to the No. 12 AWG conductors and one switch connected to the No. 14 AWG conductors. The minimum cubic inch box permitted is ___________. 314.16(a) & (b) 314.16(B) Table 314.16(B)
26.0 cubic inches
Any switchboard which is not fully enclosed requires a space of ___________ft or more between it and any combustible ceiling. 408.18(A)
3 feet
When sizing the ventilating openings for a transformer vault, the net area of all openings shall not be less than ___________ per kVA transformer capacity. 450, Part III 450.45(A)-(F)
3 square inches
The minimum clear distance in the direction of access of electric equipment operating at 480 volts shall be no less than ___________ ft, if the wall opposite of the equipment is of masonry construction. 110.26(A)(1) Table 110.26(A)
3-1/2 ft
The width of the working space in front of a 14-inch wide 100-ampere service equipment panelboard installed on the wall in the basement of a building is ___________ inches. 110.26(A)(2)
30 inches
Given a transformer with a primary 1000 volts or less, and a primary rating of 2 amperes or less, the overcurrent device setting shall not exceed ___________. 450.3(B)
300 percent
Submersible pumps installed in a fountain shall operate at a maximum of ___________ volts or less between conductors. 680.51(B)
300 volts
Nonmetallic-sheathed cable, NMC, must be supported at intervals not exceeding ___________ ft. 334.30
4.5 feet
The voltage drop on a No. 10 AWG solid THHN un-coated copper 120-volt circuit 85 ft long and connected to a 2-HP single-phase motor is ___________ volts. 430.248 Table 8
4.94 volts
An 18-ampere hermetic compressor motor is protected by a 30-ampere circuit breaker. The circuit breaker is tripping on start up. What is the largest circuit breaker permitted to be installed to start this compressor? 440.22(A)
40 amperes
A new mobile home park is being constructed. It will have 28 sites, calculate the minimum size in amperes permitted for the park service. 550.31 Table 550.31
448 amperes
All bends in Armored cables must be made so the radius of the inner edge of an bend shall not be less than ___________ the diameter of the Type AC cable. 320.24
5 times
Wall mounted boxes for light fixtures must be designed to support a minimum of ___________ pounds. 314.27(A)(1)
50 pounds
Single conductor portable supply cable sets to portable stage switchboards shall be permitted to have the grounded and grounding conductors identified by marking at least the first ___________ inches from both ends with appropriate colored marking. Article 520 Part IV
6 inches
The minimum length of free conductor required by Code to be left in boxes for splices is ___________ inches. Section 300.14
6 inches
What is the maximum percentage fill of a conduit nipple less than 24 inches long? Index-Note 4-Ch. 9-Table 1
60 percent
A dwelling unit is heated with 14 pieces of baseboard heat, each separately controlled, with a total of 18.5 kW. Using the optional calculation for a dwelling unit, what is the computed load for the heat? 220.82
7.4 kilovolt-amperes
A piece of No. 12 AWG solid copper conductor ___________ ft long has a DC resistance at 75 degrees Celsius of 1.44 ohms. Table 8, Ch. 9
746 feet
When passing over roofs optical fiber cables shall have at least ___________ ft clearance from all points of the roof. 840.44(B)
8 feet
The identification of the grounded-conductor in a flexible cord shall be permitted to be by ___________. Article 400 Part II
Any color braid with contrasting tracer.
All conductors of a multiwire branch circuit are required to ___________. 210.4(D)
Be physically grouped together.
Where metallic plugs or plates are used with nonmetallic enclosures they shall ___________. 110.12(A)
Be recessed at least 1/4" from the outer surface
"Connected to establish electrical continuity and conductivity," is the definition of ___________. Article 100 Part I
Bonded
Which of the following cable types can be used as a substitution for FPL? 760.154(A) Table 760.154(A)
CM3 CM CMR
The grounded conductor of a two-wire branch circuit shall be identified by a ___________. 210.5(A) 200.6
Continuous white or continuous gray finish.
Outdoor oil-insulated transformers shall be installed in enclosures consisting of ___________. 450.27
Fire resistant dikes Curbed areas or basins Trenches filled with coarse crushed stone.
In industrial establishments where the conditions of maintenance and supervision ensure that only qualified persons service the installation, Type ITC cable shall be permitted to be use in which of the following? 727.4
In cable trays In raceways As aerial cable on a messenger
An electric power production system that is operating in parallel with and capable of delivering energy to an electric primary source supply systems is the definition of a(n) ___________. Article 100-I
Interactive System
The nearest readily accessible location for the main 150-ampere service disconnecting means for a dwelling unit is in the bathroom area. The required working clearances can be maintained in this room and the branch-circuit overcurrent devices will be located in another room through a feeder. Which of the following best describes Code requirements for the location of this disconnecting means?230.70(A)(2)
It is not permitted in this room
A 125-volt, single-phase, 15- or 20-ampere receptacle must be installed on all rooftops when these rooftops have heating, air-conditioning, or refrigeration equipment located on them. Which of the following best describes Code requirements for installation of this receptacle? 210.63
It must be within 25 ft and also have GFCI protection.
A duplex wall receptacle is to be installed in the garage of a dwelling unit. The receptacle will be located between a refrigerator and a freezer so that each are plugged into the duplex receptacle. Which of the following best describes Code requirements installation of this receptacle? 210.8(A)(2)
It must have GFCI protection
"An area with a sink and permanent provisions for food preparation and cooking," is called a(n) ___________. Art 100-I
Kitchen
Which of the following best describes Code requirements for disconnects at detached structures? A disconnecting means ___________ . 225-II 225.31 & 225.32
Must be installed inside or outside nearest the point of entrance of the conductors.
The common point on a wye-connection in a polyphase system is called the ___________. Article 100-I
Neutral point
Taps from a 50-ampere branch-circuit must be a minimum of No.___________ copper. 210.24
No. 12 AWG copper
The minimum size of the service-entrance conductors for a dwelling unit with a net computed load 13.78 kilovolt-amperes is ___________. 230.42(A)(1), (2), or (3)
No. 4 AWG copper
"A ... value assigned to a circuit or system for the purpose of conveniently designating its ___________ class." Article 100 Part-I
Nominal voltage
Ride devices, entertainment devices, or combination thereof, that are installed so that portability or relocation is impracticable is a(n) ___________. 522.2
Permanent Amusement Attraction
In general, Class 2 and Class 3, remote control and signaling circuit wiring shall not be secured to ___________. 725.133 725.136 725.143
Raceways
Fluorescent fixtures installed in a "T-bar type lay-in" ceiling shall be: 4110-IV
Secured to the T-bar framing member.
Which of the following is not a permissable use of Service-entrance cable Type SE? 338.12(A)(2)
Service underground in conduit.
The laundry receptacle(s) required by Article 210 ___________. 210.11(C)(2)
Shall be a dedicated 20 ampere circuit with no other outlets.
Lighting track is permitted to be installed in which of the following areas? 4110.151(C)
Six feet above the finished floor.
A 24-inch wide by 5-ft long island counter top shall have receptacles installed ___________. 210.52(C)(2)
So at least one is provided.
Which of the following is not an approved grounding electrode? 250.50 250.52(A)(3)
Ten feet of bare No. 4 copper in the bottom of a footer.
Which of the following best describes a grounded conductor? Article 100
The conductor of a system that is intentionally grounded.
PVC conduit shall be supported so that ___________.
The conduit can move from expansion and contraction.
A feeder is to be installed in a health care facility which has a large 120/208-volt wye service. The service equipment main has ground-fault protection installed. Which of the following best describes Code requirements for this new feeder? 517.17(A) & (C)
The feeder must have fully selective ground-fault protection.
A duplex receptacle, in which the equipment grounding terminal is insulated from the receptacle mounting means (isolated ground receptacle), is installed in a building in which the electrical supply is from another building on the same property. The isolated equipment grounding conductor for this receptacle is to be connected where? 250.146(D)
The ground bus or neutral bar at the second building disconnect.
A permanently wired radiant heater is to be installed in a swimming pool enclosure. Which of the following would NOT be approved by code for this installation? 680.27(C)(2)
The heater shall be permitted over the pool deck if mounted higher than 12 feet.
Which of the following is considered by code to be adequate for the bonding together of metal parts on spas and hot tubs? 680.43(E)
The interconnection of threaded metal piping and fittings Metal-to-metal mounting on a common frame.. Connection with a copper bonding jumper not smaller than No. 8
A piece of electronic equipment is required to be connected with an isolated equipment grounding conductor. The design is such that the metal raceway containing the supply conductors is to be isolated from the equipment enclosure, but the raceway contains an insulated copper equipment grounding conductor. Which of the following best describes Code requirements for this installation? 250.96(A) & (B)
The isolation fitting must be located at the equipment enclosure.
A 120-volt, 20-ampere duplex receptacle is installed in an elevator pit to supply power for a sump pump. Which of the following best describes Code requirements for this installation? 620.85
The receptacle must have GFCI protection for personnel.
"The point of connection between the facilities of the serving utility and the premises wiring" is called ___________. Article 100
The service point
When a ground wire is connected to an interior gas piping system and the underground portion of the gas pipe into the building is plastic, which of the following is (or are) true? 250.104(B)(1)
This would be approved by code as the gas pipe is only being bonded to the electrical system This installation would be approved by code, as the gas pipe is not a grounding electrode.
The panel circuit directory is to be located on the face or inside of the panel door and no circuit is to be described in a manner that depends on ___________ conditions of occupancy. 408.4(A)
Transient
The only counter top in a dwelling unit kitchen is a single 22-inch wide counter top to the left of the kitchen sink. How many branch circuits are required to supply receptacle(s) over this counter top? 210.52(B)(3)
Two receptacles
An adapter cable containing one male plug and two female cord connectors used to connect two loads to one branch circuit is called a ___________. 520.2
Two-fer
Type CMUC communications cable listed as suitable for use ___________. 800.179 Table 800.179
Undercarpets
The greatest root-mean-square (rms) (effective) difference of potential between any two conductors of the circuit concerned is the ___________. Article 100
Voltage of a circuit
100 ft of PVC conduit is run between two cabinets. If its thermal expansion is ___________, an expansion joint is not required. 352.44
less than .25 inches
