West Virginia Electrical Contractor Examination

Per NEC 2020 800.18, equipment that is electrically connected to a telecommunications network is required to be which of the following?

• AListed as suitable for electrical connection to a communications network
• BField-evaluated only by the installing contractor
• CIdentified solely by the serving telephone utility
• DRated for 600 volts even when the circuit is power-limited

NEC 2020 800.53 requires communications wires and cables to be separated by at least which distance from lightning conductors, where practicable?

• A2 inches
• B12 inches
• C6 feet
• D10 feet

Which listed communications-cable type is required where a cable is installed in a plenum space used for environmental air?

• ACM
• BCMR
• CCMP
• DCMX

NEC 2020 820.93 requires the outer conductive shield of a coaxial cable entering a building to be grounded as close as practicable to the point of entrance. What is the primary purpose of that shield grounding?

• ATo increase the CATV signal strength inside the dwelling
• BTo limit voltage on the shield that could be impressed on the cable from lightning or con…
• CTo serve as the building grounding-electrode conductor for the electrical service
• DTo replace the intersystem bonding termination required by 250.94

NEC 2020 404.8(A) requires the center of the grip of a snap-switch operating handle to be installed not more than which height above the floor or working platform?

• A5 feet 6 inches
• B6 feet 0 inches
• C6 feet 7 inches
• D7 feet 0 inches

In a clothes closet, which luminaire installation complies with NEC 2020 410.16?

• AA bare incandescent lamp on a porcelain keyless lampholder on the shelf face
• BA completely enclosed incandescent luminaire installed on the wall above the door, outsid…
• CA pendant incandescent luminaire hanging over the clothes rod
• DAn open fluorescent strip laid on the closet shelf

A fixed storage-type water heater with a capacity of 120 gallons or less is treated by NEC 2020 422.13 as which kind of load for branch-circuit sizing?

• AA noncontinuous load at 100 percent
• BA continuous load
• CA motor load sized from Table 430.248
• DA receptacle load at 180 VA

A 240-volt, single-phase, 8,000-watt fixed electric space heater is a continuous load per NEC 2020 424.3(B). What is the minimum branch-circuit conductor ampacity and the minimum overcurrent-device rating basis?

• A33.3 A
• B40.0 A
• C41.7 A
• D50.0 A

NEC 2020 406.12 requires tamper-resistant receptacles in which of the following locations?

• ADwelling units, including attached and detached garages and accessory buildings
• BIndustrial process areas accessible only to qualified persons
• COnly bedrooms of dwelling units
• DOnly outdoor receptacles rated 250 volts

A single air-conditioning motor-compressor has a rated-load current of 24 amperes and no branch-circuit selection current on the nameplate. Per NEC 2020 440.32, what is the minimum branch-circuit conductor ampacity?

• A24 A
• B30 A
• C36 A
• D48 A

A 75 kVA, 480-volt, three-phase transformer is protected on the primary only. Using √3 = 1.732 and NEC 2020 450.3(B), what is the maximum standard inverse-time breaker rating permitted for that primary (next higher standard size allowed)?

• A90 A
• B100 A
• C110 A
• D125 A

A 15-ampere, 125-volt receptacle is installed on the exterior wall of a dwelling in a wet location. NEC 2020 406.9(B)(1) requires which cover arrangement?

• AA standard indoor cover, because the receptacle is GFCI protected
• BAn extra-duty weatherproof enclosure that remains weatherproof whether or not an attachme…
• CA weatherproof cover required only while the receptacle is unused
• DNo cover if the receptacle is listed weather-resistant

A purely resistive 240-volt heater has a resistance of 16 ohms. What current does it draw?

• A8 A
• B12 A
• C15 A
• D16 A

Three resistors of 8 ohms, 12 ohms, and 20 ohms are connected in series across 120 volts DC. What is the total current?

• A3.0 A
• B5.0 A
• C6.0 A
• D15.0 A

Two 30-ohm resistors are connected in parallel, and that combination is in series with a 10-ohm resistor. The circuit is supplied at 120 volts DC. What is the total current?

• A3.0 A
• B4.8 A
• C6.0 A
• D12.0 A

A 120-volt circuit supplies a purely resistive load that draws 8 amperes. What is the power of the load?

• A15 W
• B96 W
• C480 W
• D960 W

A balanced 208-volt, three-phase load draws 50 amperes at a lagging power factor of 0.90. Using √3 = 1.732, what is the real power?

• A9.4 kW
• B16.2 kW
• C18.0 kVA
• D10.4 kW

A 60 Hz series circuit contains 9 ohms of resistance, 15 ohms of inductive reactance, and 3 ohms of capacitive reactance. What is the total impedance?

• A27 ohms
• B21 ohms
• C15 ohms
• D12 ohms

What is the peak (zero-to-peak) value of a 120-volt RMS sinusoidal voltage? Use √2 = 1.414.

• A84.8 V
• B120 V
• C169.7 V
• D339.4 V

A 45 kVA, three-phase transformer has a 480-volt primary and a 208Y/120-volt secondary. Using √3 = 1.732, what is the secondary full-load line current?

• A54 A
• B125 A
• C216 A
• D94 A

A 240-volt, single-phase circuit carries 30 amperes for 150 feet on copper conductors. Use K = 12.9 and a circular-mil area of 16,510 CM for 8 AWG. What is the voltage drop?

• A3.5 V
• B7.0 V
• C11.5 V
• D5.2 V

A 480-volt, three-phase circuit carries 80 amperes for 200 feet on copper conductors. Use K = 12.9, √3 = 1.732, and a circular-mil area of 83,690 CM for 1 AWG. What is the voltage drop?

• A4.3 V
• B4.9 V
• C7.4 V
• D2.5 V

What is the synchronous speed of a 4-pole AC motor operating on 60 Hz?

• A900 RPM
• B1,200 RPM
• C1,800 RPM
• D3,600 RPM

A 6-pole, 60 Hz motor has a measured rotor speed of 1,150 RPM. What is the percent slip?

• A2.0 percent
• B4.2 percent
• C8.0 percent
• D14.5 percent

A three-phase load measures 36 kW of real power and 45 kVA of apparent power. What is the power factor, and what is the reactive power?

• A0.80 and 9 kVAR
• B1.25 and 27 kVAR
• C0.80 and 27 kVAR
• D0.64 and 36 kVAR

A motor delivers 10 horsepower at the shaft and draws 8,500 watts from the supply. Using 1 hp = 746 watts, what is the motor efficiency?

• A88 percent
• B80 percent
• C114 percent
• D75 percent

A 24-foot by 20-foot room is to be lighted to 40 foot-candles. The coefficient of utilization is 0.75 and the light-loss factor is 0.80. How many lumens must the luminaires supply?

• A19,200 lumens
• B25,600 lumens
• C32,000 lumens
• D38,400 lumens

NEC Chapter 9, Table 8 lists 12 AWG uncoated copper as 6,530 circular mils with a DC resistance of 1.98 ohms per 1,000 feet at 75°C. What is the one-way conductor resistance of a 150-foot run?

• A0.20 ohm
• B0.30 ohm
• C0.40 ohm
• D1.98 ohms

NEC 2020 430.6(A)(1) requires branch-circuit conductors and short-circuit/ground-fault protection for a motor to be sized from which current?

• AThe motor nameplate full-load current only
• BThe full-load current values in Tables 430.247 through 430.250
• CThe locked-rotor current on the nameplate divided by six
• DThe service-factor amperes stamped on the controller

A 5-horsepower, 230-volt, single-phase motor is installed on a West Virginia commercial job. Using NEC 2020 Table 430.248 and 430.22, what is the minimum branch-circuit conductor ampacity?

• A28 A
• B32 A
• C35 A
• D40 A

Per NEC 2020 Table 430.52, the maximum rating of an inverse-time circuit breaker used as motor branch-circuit short-circuit and ground-fault protection is which percentage of the motor FLC?

• A125 percent
• B175 percent
• C250 percent
• D300 percent

A feeder supplies two 230-volt, three-phase motors: 10 horsepower (Table 430.250 FLC 28 A) and 5 horsepower (FLC 15.2 A). Per NEC 2020 430.24, what is the minimum feeder conductor ampacity?

• A43.2 A
• B50.2 A
• C53.9 A
• D35.0 A

A 10-horsepower, 460-volt, three-phase motor is protected by an inverse-time circuit breaker. Using Table 430.250 (FLC 14 A) and Table 430.52, what is the maximum standard inverse-time breaker rating before applying the next-size-up exception?

• A20 A
• B30 A
• C35 A
• D40 A

A 15-horsepower continuous-duty motor has a service factor of 1.15. Per NEC 2020 430.32(A)(1), the separate overload device shall be selected to trip at not more than which percentage of the motor nameplate full-load current rating?

• A115 percent
• B125 percent
• C140 percent
• D250 percent

NEC 2020 430.102(B) generally requires a disconnecting means for a motor to be located in sight from the motor location and the driven machinery. “In sight from” in Article 100 means which of the following?

• AVisible and not more than 50 feet distant
• BVisible, with no distance limit
• COn the same floor of the building
• DWithin the same lockable room, regardless of distance

An electrical plan is drawn at a scale of 1/4 inch = 1 foot-0 inches. A feeder run measures 8-1/2 inches on the drawing. What is the actual length of the run?

• A8.5 feet
• B17 feet
• C34 feet
• D68 feet

On a panel schedule, a homerun tagged “A-24,26,28” most nearly indicates which of the following?

• AA single-pole circuit that can land in any of three spare spaces
• BA three-pole circuit occupying spaces 24, 26, and 28 in panel A
• CTwenty-four receptacles, twenty-six lights, and twenty-eight switches on panel A
• DA feeder that is 24 feet, 26 inches, and 28 MCM

On a set of electrical drawings, which statement correctly distinguishes a one-line diagram from a riser diagram?

• AA one-line diagram shows every conduit bend; a riser diagram shows only receptacle symbols
• BA one-line diagram is a single-line schematic of major equipment and conductors; a riser…
• CA one-line diagram is used only for communications; a riser diagram is used only for fire…
• DThe two terms are interchangeable and never appear together on the same project

NEC 2020 Articles 700, 701, and 702 cover which three systems, in that order?

• AOptional standby, legally required standby, and emergency systems
• BEmergency systems, legally required standby systems, and optional standby systems
• CFire pumps, emergency systems, and legally required standby systems
• DInterconnected sources, energy storage, and emergency systems

NEC 2020 700.10(A) requires boxes, enclosures, and exposed cables or raceways of an emergency system to be identified so that they are readily identified as a component of the emergency system. Which identification method satisfies that rule?

• ANo marking is required if the emergency conductors are the same color as the normal condu…
• BA color, other marking, or other effective means that identifies the emergency system, ke…
• CA single tag applied only at the generator and nowhere else
• DMarking only the normal system, leaving the emergency system unmarked

NEC 2020 725.136 generally requires Class 2 and Class 3 circuit conductors to be separated from electric light, power, Class 1, non-power-limited fire alarm, and medium-power network-powered broadband conductors by which arrangement?

• AA barrier or a minimum 2-inch separation, unless a listed exception applies
• BNo separation, because Class 2 circuits are inherently safe
• CA minimum 6-foot separation in all cases
• DInstallation only in the same raceway as the 120-volt lighting circuit they control

Which listed power-limited fire alarm cable type is required where a fire-alarm cable is installed in a vertical run penetrating more than one floor and is not in a plenum?

• AFPL
• BFPLR
• CFPLP
• DCM

NEC 2020 700.16 requires emergency illumination to be designed and installed so that the failure of any single lighting element, such as the burning out of a lamp, cannot leave an area in total darkness. What additional 700.16 requirement applies when emergency lighting is automatically controlled?

• AThe emergency lighting must remain off until a fire-alarm signal is received
• BNo control of emergency lighting is permitted under any circumstance
• CThe emergency lighting must come on automatically upon failure of the normal lighting sup…
• DEmergency lighting may be switched off from any occupant dimmer on the normal lighting ci…

NEC 2020 680.22(A)(1) requires at least one 125-volt, 15- or 20-ampere receptacle for a permanently installed pool to be located not less than which distance, and not more than which distance, from the inside wall of the pool?

• ANot less than 3 feet and not more than 10 feet
• BNot less than 6 feet and not more than 20 feet
• CNot less than 10 feet and not more than 25 feet
• DNot less than 1.5 feet and not more than 6 feet

NEC 2020 680.26 equipotential bonding of a permanently installed pool generally requires the bonding conductor to be which of the following?

• A12 AWG stranded copper, insulated, green
• B8 AWG solid copper, insulated, covered, or bare
• C6 AWG aluminum
• D4 AWG copper-clad aluminum