2024 Edition

Journeyman Electrician - Test 3 - 2014 NEC

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1.	Each patient bed location in the general care areas of a hospital or similar health care facility shall be provided with a MINIMUM of _____ 125-volt, single-phase, 15- or 20-ampere listed "hospital grade" receptacles.
		a. eight
		b. six
		c. ten
		d. fourteen
Section 517.18(B) requires the minimum number of receptacles required for each patient bed location of health care facilities is eight. All the receptacles are to be listed "hospital grade" and the grounding terminal is required to be connected to an insulated copper equipment grounding conductor. As per 517.18(A) each patient bed location in general care areas shall be supplied by at least two branch circuits, one from the critical branch and one from the normal system. This requirement ensures power to be available upon the interruption of the normal power source. Incorrect answer. Please choose another answer.

2.	Given: A single-family dwelling with a 200-ampere, 120/240-volt, single-phase main service panel is being supplied with size 2/0 AWG THW copper ungrounded service-entrance conductors in rigid metal conduit (RMC). The MINIMUM allowable size of the supply side bonding jumper required for this service-entrance conduit is _____.
		a. 6 AWG copper
		b. 4 AWG copper
		c. 2 AWG copper
		d. 1/0 AWG copper
As provided by Section 250.102(C)(1) the supply-side bonding jumper is not to be smaller than the sizes shown in Table 250.102(C)(1), which is based on the size of the largest ungrounded service-entrance conductor. In this situation the ungrounded service-entrance conductors are 2/0 AWG copper, therefore the bonding jumper is required to be 4 AWG copper. Incorrect answer. Please choose another answer.

3.	Where rigid metal conduit (RMC) or intermediate metal conduit (IMC) is threaded in the field and corrosion protection is necessary, the threads shall be coated with a/an _____ compound.
		a. corrosion-proof
		b. judged suitable corrosion-resistant
		c. approved electrically conductive, corrosion resistant
		d. bitumen based approved
The purpose of Section 300.6(A) is to provide ferrous metal conduit with corrosion protection with the application of an approved anti-corrosion compound where the conduit is threaded in the field. Incorrect answer. Please choose another answer.

4.	Disregarding exceptions, conductors installed in parallel must be _____. I) the same length II) the same size
		a. I only
		b. II only
		c. both I and II
		d. neither I nor II
When conductors are installed in parallel, to avoid excessive voltage drop and ensure equal division of current, different phase conductors must be located close together and each phase conductor, grounded conductor, and the grounding conductor must be grouped together in each raceway or cable. Section 310.10(H)(2)(1) requires all conductors of the same phase be the same length, and Section 310.10(H)(2)(3) requires the conductors to be the same size in circular mil area. Incorrect answer. Please choose another answer.

5.	Determine the MAXIMUM allowable current-carrying capacity of a size 1/0 AWG THW copper conductor installed in a common raceway with three (3) other current carrying conductors of the same size and insulation where the ambient temperature is 86 deg. F.
		a. 150 amperes
		b. 105 amperes
		c. 112 amperes
		d. 120 amperes
Before derating, Table 310.15(B)(16) shows the ampacity of 1/0 AWG THW copper conductors to be 150 amperes, which is to be multiplied by 80% [selected from the adjustment factors for more than 3 current-carrying conductors in the raceway shown in Table 310.15(B)(3)(a)]. Therefore, the allowable ampacity of the conductors is reduced to 120 amperes. 150 amperes x 80% (adjustment factor) = 120 amperes Incorrect answer. Please choose another answer.

6.	Where used outdoors, aluminum grounding electrode conductors shall not be terminated within _____ of the earth.
		a. 18 inches
		b. 24 inches
		c. 30 inches
		d. 36 inches
To prevent corrosion of aluminum grounding electrode conductors, where used outside, they are not permitted to be terminated within 18 in. of the earth. Refer to Section 250.64(A). Incorrect answer. Please choose another answer.

7.	Determine the MAXIMUM initial standard size nontime delay fuses permitted for branch-circuit, short-circuit and ground-fault protection for a 5 hp, 240-volt, single-phase, ac continuous-duty motor with no code letter indicated on the nameplate.
		a. 60 amperes
		b. 75 amperes
		c. 80 amperes
		d. 90 amperes
As shown in Table 430.248 the full-load current rating of the motor is 28 amperes. This value is to be used when sizing the overcurrent protective devices from Table 430.52, which shows nontime-delay fuses are to be sized at not more than 300% of the FLC of the motor. 28 amperes x 300% = 84 amperes. According to Section 240.6(A), this is not a standard size fuse rating therefore, Section 430.52(C)(1),EX.1, permits you to go up to the next standard size fuses having a rating of 90 amperes. FLC of motor = 28 amperes [Tbl. 430.248] 28 amperes x 300% = 84 amperes [Tbl. 430.52] Incorrect answer. Please choose another answer.

8.	When a conductor has a computed ampacity of 75 amperes, the MAXIMUM standard ampere rating of the overcurrent protection device the NEC permits to protect this circuit is rated _____ if this is not a motor circuit or part of a branch circuit supplying multiple receptacles.
		a. 70 amperes
		b. 75 amperes
		c. 80 amperes
		d. 90 amperes
Section 240.6(A) lists the standard ratings of overcurrent devices. Where the ampacity of the conductor does not match a standard overcurrent device as listed in Section 240.6(A), 240.4(B) permits the use of the next larger standard overcurrent device; provided the conductors being protected are not part of a branch circuit supplying more than one receptacle, and where the next higher standard overcurrent device is rated 800 amperes or less. Incorrect answer. Please choose another answer.

9.	A 20-ampere, 120-volt load is located 150 ft. from a panelboard and is supplied with size 10 AWG copper branch-circuit conductors with THWN-2 insulation. What is the approximate voltage drop on the conductors? (K = 12.9)
		a. 1.8 volts
		b. 9.5 volts
		c. 7.5 volts
		d. 15 volts
To calculate the voltage drop on this circuit, first locate the circular mil area of the conductors (10,380 CM) as indicated in Table 8 of Chapter 9. Then apply the single-phase voltage drop formula: VD = 2 x K x I x D VD = 2 x 12.9 x 20 x 150 = 7.45 volts dropped CM 10,380 Incorrect answer. Please choose another answer.

10.	A concrete-encased grounding electrode shall consist of at LEAST _____ in one continuous 20 foot length. I) size 4 AWG bare copper conductor II) in. diameter steel reinforcing rod
		a. I only
		b. II only
		c. neither I nor II
		d. either I or II
Either may qualify as a grounding electrode. The horizontal or vertical installation of in. diameter steel reinforcing rod or the 4 AWG bare copper conductor within the concrete encasement is required to be in one continuous 20-foot length so that a 20-foot long electrode is in contact with the earth. Reference Section 250.52(3)(1)&(2). Incorrect answer. Please choose another answer.

11.	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 ft. conduit run.
		a. 1 in.
		b. 1 in.
		c. 1 in.
		d. 2 in.
Where the conductors in conduit or tubing are all of the same physical size and insulation characteristic, the use of Annex C tables is permitted. For this question you are to determine the minimum trade size EMT required to enclose eight size 6 AWG THHW conductors. You should have selected a trade size 1 in. EMT from Table C.1 of Annex C. Incorrect answer. Please choose another answer.

12.	Under which, if any, of the following conditions is the neutral NOT to be counted as a current carrying conductor? I) When it is only carrying the unbalanced current. II) When it is the neutral of a 3-phase wye-connected system where the major portion of the load consists of nonlinear loads.
		a. I only
		b. II only
		c. both I and II
		d. neither I nor II
Section 310.15(B)(5)(a), indicates where a neutral conductor that carries only the unbalanced current from other conductors of the same circuit shall not be counted as a current-carrying conductor. An example of this would be a 120/240-volt, single-phase, system supplying incandescent luminaires, general-use receptacles and appliances of a residence. Section 310.15(B)(5)(c), mandates on a 3-phase, 4-wire circuit where the major portion of the load consists of nonlinear loads, the neutral conductor is considered a current-carrying conductor. A good example of this type of system is a 208Y/120-volt, 3-phase system that supplies fluorescent luminaires in a school or office building. Incorrect answer. Please choose another answer.

13.	In general, outside open conductors on insulators, of 600 volts or less, must be covered or insulated when they are WITHIN _____ of a building
		a. 10 feet
		b. 12 feet
		c. 15 feet
		d. 25 feet
The intent of Section 225.4 is to prevent inadvertent contact with the conductors and eliminate a shock hazard. Incorrect answer. Please choose another answer.

14.	For the purpose of determining box fill, size 12 AWG THWN copper conductors are to be calculated at ____ per grounded or ungrounded conductor.
		a. 1.75 cubic inches
		b. 2.00 cubic inches
		c. 2.25 cubic inches
		d. 2.50 cubic inches
For the purpose of determining box fill, Table 314.16(B) shows size 12 AWG conductors to be calculated at 2.25 cubic inches per grounded or ungrounded conductor contained in the box. When applying this table, disregard the insulation type and conductor material. Incorrect answer. Please choose another answer.

15.	What is the MAXIMUM distance allowed between supports when installing nonmetallic sheathed cable (NM)?
		a. 3 feet
		b. 4 feet
		c. 6 feet
		d. 5 feet
To ensure Type NM cable is adequately supported, Section 334.30 requires the cable to be supported at intervals not exceeding 4 ft. Incorrect answer. Please choose another answer.

16.	In general, a motor disconnecting means must disconnect:
		a. only the motor.
		b. only the controller.
		c. only the control circuit.
		d. both the motor and controller.
The general rule is a motor disconnecting means must disconnect both the motor and controller. Refer to Section 430.75(A). Incorrect answer. Please choose another answer.

17.	Given: A 20 ft. feeder tap for lighting has an ampacity of 150 amperes. What is the MAXIMUM ampere rating permitted for an overcurrent protection device protecting the conductors from which they are tapped?
		a. 100 amperes
		b. 300 amperes
		c. 400 amperes
		d. 450 amperes
In this situation, Section 240.21(B)(2)(1) requires the ampacity of the tap conductors to be not less than one-third of the rating of the overcurrent device protecting the feeder conductors. Thus, 150 amperes (tap conductors) multiplied by 3 = 450 amperes. Incorrect answer. Please choose another answer.

18.	The critical branch of the hospital essential electrical system shall provide power to all the operating rooms and all _____. I) emergency room treatment areas II) nurses stations
		a. I only
		b. II only
		c. both I and II
		d. neither I nor II
As mandated by Sections 517.33(A)(3)g & (8)f, the critical branch of the hospital essential electrical system shall supply power and task illumination for emergency room treatment areas and nurses stations. The critical branch is intended to serve a limited number of receptacles and locations in order to reduce the load and minimize the chances of a fault condition. The critical branch is intended to automatically connect to alternate power sources by transfer switches during interruption of the normal power source. Incorrect answer. Please choose another answer.

19.	When sizing the overcurrent protection for a single non-motor operated appliance, which of the following need NOT to be taken into consideration?
		a. The length of time the appliance operates.
		b. The full-load current marked on the appliance.
		c. The voltage rating of the appliance.
		d. Where the overcurrent protection selected is not a standard size.
Where sizing overcurrent protection for a single non-motor operated appliance, Section 422.11(E) does not address the issue of the length of time the appliance operates. In order to properly size the overcurrent protection for the appliance, you must know the voltage rating and the full-load current of the appliance. Section 422.11(E)(3) permits the overcurrent protection to be sized up to 150% of the full-load current rating of the appliance. Where the overcurrent protection selected does not correspond to a standard ampere rating, the next higher standard rating shall be permitted. Incorrect answer. Please choose another answer.

20.	In new installations, the MINIMUM working space the NEC requires between a 480/277-volt, wye, switchboard and a 480-volt motor control center where facing each other is _____.
		a. 3 feet
		b. 3 feet
		c. 4 feet
		d. 6 feet
Under this condition, where exposed live parts of equipment having a voltage in excess of 150 volts to ground are on both sides of the working space, Table 110.26(A)(1) requires a working space of 4 ft. between the equipment. Incorrect answer. Please choose another answer.

21.	In all child care facilities, all nonlocking-type, 125-volt, 15- and 20-ampere receptacles, shall be _____.
		a. GFCI protected
		b. AFCI protected
		c. both GFCI and AFCI protected
		d. listed tamper-resistant
The requirement for listed tamper-resistant 15- and 20-ampere receptacles in child care facilities is intended to increase safety for children. Tamper-resistant receptacles are constructed to prevent one from inserting a metal object such as paper clip into the ungrounded portion of the receptacle. This mandate located in Section 406.12(C) is intended to prevent shock hazards. Incorrect answer. Please choose another answer.

22.	When branch circuit conductors are installed inside a ballast compartment of a luminaire and they are within 3 inches of the ballast, the conductors shall have a temperature rating NOT lower than _____.
		a. 105°C
		b. 90°C
		c. 75°C
		d. 60°C
Because of the heat transfer from the ballast to the circuit conductors, Section 410.68 requires when the branch circuit conductors are within 3 in. of the ballast, they are to have a temperature rating of not less than 90 C. Incorrect answer. Please choose another answer.

23.	In general, branch-circuit conductors supplying residential electric ranges of 8.75 kW or more in rating shall be rated at LEAST _____.
		a. 30 amperes
		b. 60 amperes
		c. 40 amperes
		d. 50 amperes
The intent of Section 210.19(A)(3) is to ensure the branch-circuit conductors supplying the appliance are large enough to carry the load. Incorrect answer. Please choose another answer.

24.	Regardless of the applied voltage, or the type of insulation, size 12 AWG copper conductors require overcurrent protection NOT in excess of _____.
		a. 20 amperes
		b. 25 amperes
		c. 15 amperes
		d. 30 amperes
Section 240.4(D)(5) requires overcurrent protection of size 12 AWG conductors to be no more than 20 amperes. The purpose of this mandate is to prevent overloading and overheating of the conductors. Incorrect answer. Please choose another answer.

25.	A size 2 AWG copper conductor having a temperature rating of 75 deg. C has an allowable ampacity of _____ when installed in an area where the ambient temperature is expected to reach 100 deg. F.
		a. 101 amperes
		b. 110 amperes
		c. 115 amperes
		d. 84 amperes
Prior to derating, Table 310.15(B)(16) shows the ampacity of size 2 AWG copper conductors with a 75C temperature rating to be 115 amperes, which is to be multiplied by 0.88 [selected from the temperature correction factors found in Table 310.15(B)(2)(a)]. Therefore the allowable ampacity of the conductor is reduced to 101 amperes. Size 2 AWG @ 75 deg. C ampacity (before derating) = 115 amperes 115 amperes x .88 (temperature correction factor) = 101 amperes Incorrect answer. Please choose another answer.

26.	Wiring located above heated ceilings, where installed less than two (2) inches above the heated ceiling, shall be considered as operating at an ambient temperature of _____ .
		a. 90 degrees F
		b. 122 degrees F
		c. 110 degrees F
		d. 86 degrees F
Because of the heat generated by the heating cables, where conductors are installed less than two inches above a heated ceiling, the ambient temperature surrounding the conductors is considered to be 122F. Reference Section 424.36. Incorrect answer. Please choose another answer.

27.	Where the motor controller also serves as a disconnecting means, it shall open all _____ conductors to the motor.
		a. grounded
		b. neutral
		c. grounding
		d. ungrounded
Because of the heat generated by the heating cables, where conductors are installed less than two inches above a heated ceiling, the ambient temperature surrounding the conductors is considered to be 122F. Reference Section 424.36. Incorrect answer. Please choose another answer.

28.	Apply the general method of calculation and determine the demand load, in VA, for a one-family dwelling having a total connected load of 96,400 VA for the general lighting, small appliance and laundry loads.
		a. 33,740 VA
		b. 66,740 VA
		c. 35,690 VA
		d. 34,790 VA
When applying the general method of calculation for dwelling units the demand factors specified in Table 220.42 are to be applied. The concept for applying demand factors is that the entire connected load is not likely to be used at one time. To size the service-entrance conductors for a dwelling unit with a connected load of 96,400 VA apply the values as specified in Table 220.42 as shown: 1st 3,000 VA @ 100% = 3,000 VA remainder (96,400 VA - 3,000 VA) = 93,400 VA @ 35% = 32,690 VA Demand load = 35,690 VA Incorrect answer. Please choose another answer.

29.	Circuit breakers are NOT listed for continuous-use, unless they have an ampere rating of at LEAST _____ or more.
		a. 60 amperes
		b. 100 amperes
		c. 200 amperes
		d. 600 amperes
In general, circuit breakers with a rating of less than 600 amperes are not listed for continuous-use. This issue is not addressed in the NEC. Incorrect answer. Please choose another answer.

30.	Circuits that supply outline lighting systems containing incandescent luminaires shall be rated NOT to exceed _____.
		a. 15 amperes
		b. 20 amperes
		c. 30 amperes
		d. 50 amperes
In compliance with Section 600.5(B)(2), branch circuits that supply outline lighting systems that are not neon illuminated, shall be rated not to exceed 20 amperes. Incorrect answer. Please choose another answer.

31.	In a health care facility, low voltage electrical equipment that is likely to become energized that is frequently in contact with the bodies of patients, shall operate on a voltage of _____ or less if the equipment is not approved as intrinsically safe, double-insulated or moisture-resistant.
		a. 10 volts
		b. 24 volts
		c. 100 volts
		d. 120 volts
This rule is in place to eliminate a shock hazard to patients and health care workers. Reference 517.64(A)(1),(2)&(3). Incorrect answer. Please choose another answer.

32.	Determine the largest trade size raceway permitted to be installed in a junction box given the following related information: junction box is 12 inches in length conductors are size 4 AWG a straight pull of the conductors is to be made
		a. 1 in.
		b. 1 in.
		c. 1 in.
		d. 2 in.
Section 314.28(A)(1) applies to minimum dimensions of junction boxes used with conduits containing conductors size 4 AWG or larger. In straight pulls the length of the box is required to be not less than eight times the trade size of the largest conduit entering the box. Therefore: 12 in. (box) 8 (raceway) = 1.5 or 1 in. conduit Incorrect answer. Please choose another answer.

33.	Determine the voltage drop on a branch circuit given the following related information: current = 5 amperes conductor length = 300 ft. conductor resistance = 4 ohms per 1,000 feet
		a. 0.02 volts
		b. 0.12 volts
		c. 1.2 volts
		d. 6 volts
To determine the voltage drop on this circuit, first find the resistance total with the information given in the question: Resistance = 4 ohms 1000 ft. = .004 ohms per ft. .004 ohms x 300 ft. = 1.2 ohms total resistance Next, apply the voltage drop formula, VD = I X R: VD= 5 amperes x 1.2 ohms = 6 volts dropped Incorrect answer. Please choose another answer.

34.	Given: A feeder is to supply the following continuous-duty ac motors from a motor control center: motor #1 - FLC = 10 amperes motor #2 - FLC = 20 amperes motor #3 - FLC = 30 amperes The feeder conductors are required to have an ampacity of at LEAST _____.
		a. 60.0 amperes
		b. 75.0 amperes
		c. 67.5 amperes
		d. 90.0 amperes
The requirements of Sections 430.24(1)&(2) are based on the principle that the conductors supplying more than on motor should be sized to have an ampacity equal to 125% of the full-load current of the highest rated motor in the group, plus the full-load currents of all other motors in the group. 10 amps x 100% = 10.0 amperes 20 amps x 100% = 20.0 amperes 30 amps x 125% = 37.5 amperes TOTAL = 67.5 amperes Incorrect answer. Please choose another answer.

35.	What is the MINIMUM general lighting demand load, in VA, of an industrial commercial (loft) building having dimensions of 100 ft. x 300 ft.?
		a. 60,000 VA
		b. 75,000 VA
		c. 90,000 VA
		d. 105,000 VA
As shown in Table 220.12 when calculating the general lighting load of a industrial commercial (loft) building, a unit load of 2 VA per sq. ft. is to be applied. Also as per Section 230.42(A)(1), because this load is considered a continuous load, you are to multiply this value by 125%. First, find the total square feet of the building. 100 ft. x 300 ft. = 30,000 sq. ft. x 2 VA = 60,000 VA x 125% demand = 75,000 VA Incorrect answer. Please choose another answer.

36.	All single-phase, 125-volt, 15- or 20-ampere receptacle outlets installed for countertop appliances in dwelling unit kitchens, must be located above, but NOT more than _____ above the countertop surface.
		a. 12 inches
		b. 18 inches
		c. 20 inches
		d. 24 inches
In compliance with Section 210.52(C)(5), receptacle outlets installed for countertop surfaces in dwelling units may be located on or above, but not more than 20 inches above the countertop. The intent of this rule is to eliminate the use of unsightly extension cords (which reduces the amount of usable countertop space) on the countertop to supply cord-and-plug connected appliances. Also, receptacles located more than 20 inches above countertops may interfere with the cabinetry to be installed. Incorrect answer. Please choose another answer.

37.	For capacitors of over 600 volts, a means shall be provided to reduce the residual voltage of a capacitor to _____ after the capacitor is disconnected from the source of supply.
		a. 50 volts or less within 1 minute
		b. 24 volts or less within 1 minute
		c. 50 volts or less within 10 minutes
		d. 50 volts or less within 5 minutes
The purpose of this requirement addressed in Section 460.28(A), is to drain off the stored charge in a capacitor after the supply circuit has been opened. Otherwise, a person servicing the equipment could receive a severe shock, or damage could occur to the equipment. Incorrect answer. Please choose another answer.

38.	In general, the disconnecting means for an air-conditioning unit _____.
		a. shall not be located anywhere on the unit
		b. shall not be located adjacent to the A/C unit
		c. shall not be located on panels of the A/C unit that are designed to allowacce ss to the unit
		d. is permitted to be located on the access panels of the A/C unit, where the top of the disconnect is not within 12 inches of the top of the A/C unit
As per Section 440.14, the disconnecting means for an air-conditioning unit is permitted to be installed on the unit, if it is not located on panels that are designed to allow access to the equipment. Incorrect answer. Please choose another answer.

39.	Grounding conductors and bonding jumpers shall NOT be connected by _____.
		a. exothermic welding
		b. pressure connectors
		c. machine screw-type fasteners
		d. sheet metal screws
Section 250.8(A) recognizes equipment grounding conductors and bonding jumpers are permitted to be connected by exothermic welding, pressure connectors, and machine screw-type fasteners, but sheet metal screws are not an acceptable method of connection. Incorrect answer. Please choose another answer.

40.	Edison base fuses are prohibited _____.
		a. for new work in all buildings
		b. in commercial occupancies for existing work
		c. in residential occupancies for existing installations
		d. in damp locations
As mandated in Section 240.51(B), Edison-base type fuses shall be used only for replacements in existing installations. The purpose of this requirement is to phase out the old style fuses. Incorrect answer. Please choose another answer.

41.	In general, flexible metal conduit (FMC) shall be secured by an approved means at intervals NOT exceeding _____ and within at LEAST _____ of every outlet box, panelboard, conduit body or other conduit termination.
		a. 3 feet - 12 inches
		b. 4 feet - 12 inches
		c. 6 feet - 18 inches
		d. 8 feet - 24 inches
The purpose of Section 348.30(A) is to ensure flexible metal conduit (FMC) is securely fastened in place. Incorrect answer. Please choose another answer.

42.	For emergency systems where internal combustion engines are used as the prime mover, an on-site fuel supply shall be provided with an on-site fuel supply sufficient for NOT less than _____ full-demand operation of the system.
		a. 2 hours
		b. 3 hours
		c. 4 hours
		d. 6 hours
For emergency systems where internal combustion engines, such as generators, are used as the prime mover, Section 700.12(B)(2) requires a fuel supply sufficient for not less than 2 hours full-demand operation of the system. Incorrect answer. Please choose another answer.

43.	Type MI cable shall be supported at intervals NOT exceeding _____.
		a. two feet
		b. four feet
		c. six feet
		d. ten feet
To assure Type MI cable is adequately fastened in place, Section 332.30 mandates the cable to be supported at intervals not exceeding 6 ft. Incorrect answer. Please choose another answer.

44.	Given: You are to install a back-up generator with a rating of 18 kW, 120/240-volts, single-phase, at a farm house. Where the design and operation of the generator does not prevent overloading, the ampacity of the conductors from the generator terminals to the first overcurrent protective device must be at LEAST _____.
		a. 75 amperes
		b. 86 amperes
		c. 94 amperes
		d. 100 amperes
First, find the full-load current available at the generator terminals by using the single-phase current formula and as Section 445.13 requires, multiply this value by 115%. I = 18 kW x 1000 = 18,000 watts = 75 amperes x 115% = 86 amperes 240 volts 240 volts Incorrect answer. Please choose another answer.

45.	Continuous-duty motors, rated more than 1 hp, with a service factor of less than 1.15, shall have the MINIMUM running overload protection sized at _____ of the motor nameplate full-load ampere rating, or may have the MAXIMUM running overload protection sized at no more than _____ of the nameplate FLA rating of the motor.
		a. 115% - 130%
		b. 125% - 140%
		c. 125% - 130%
		d. 115% - 140%
Adequately applied overload protection should protect the motor from any overload condition prior to damage occurring in the motor. As per Section 430.32(A)(1), motors with a service factor of less than 1.15 are to have the trip setting of the overload device at no more than 115% of the full-load current rating indicated on the motor nameplate. However, when the overload device selected in accordance with 430.32(A)(1) is not sufficient to start the motor or carry the load, the values shown in Section 430.32(C) are permitted to be used. Where this condition occurs, the trip setting may be 130% of the motor nameplate current rating. Incorrect answer. Please choose another answer.

46.	Which of the following listed is NOT permitted for use as a grounding electrode?
		a. metal underground water pipe
		b. a driven ground rod 8 ft. in length
		c. metal underground gas pipe
		d. concrete-encased building steel
A per Section 250.52(B)(1), a metal underground gas pipe is not approved for use as a grounding electrode. Incorrect answer. Please choose another answer.

47.	What is the MAXIMUM standard size overcurrent protective device that may be used to protect a storage-type water heater with a rating of 4,500 watts, 240-volts, single-phase?
		a. 20 amperes
		b. 25 amperes
		c. 300 amperes
		d. 35 amperes
In compliance with Section 422.11(E)(3), the overcurrent protective device for a non-motor operated appliance is permitted to be sized at 150% of the current rating of the appliance. Where the value selected does not correspond with the rating of a standard size overcurrent device, you are permitted to go up to the next standard size as shown in Section 240.6(A) . I = 4,500 watts = 18.75 amperes x 150% = 28.15 amperes 240 volts Note, the next standard size overcurrent device is rated 30 amperes. Incorrect answer. Please choose another answer.

48.	Determine the conductor ampacity given the following related information: conductors are size 500 kcmil THWN copper ambient temperature is 125 deg. F eight (8) current-carrying conductors are in the raceway
		a. 178.2 amperes
		b. 199.5 amperes
		c. 294.6 amperes
		d. 380.0 amperes
A indicated in Table 310.15(B)(16), size 500 kcmil THWN copper conductors have an allowable ampacity of 380 amperes before any ampacity correction factors are applied. Due to the elevated temperature, multiply 380 amperes by 0.67 [temperature correction value shown in Table 310.15(B)(2)(a)] and due to the number of current-carrying conductors contained in the raceway, multiply by .7 [adjustment factor shown in Table 310.15(B)(3)(a)]. Thus, 500 kcmil THWN copper ampacity before derating = 380 amperes 380 amps x .67 (temp. correction) x .7 (adj. factor) = 178.22 amperes Incorrect answer. Please choose another answer.

49.	The use of UF cable is prohibited by the NEC® if used _____.
		a. underground
		b. as service cable
		c. for branch circuits
		d. in attic spaces
Section 340.10 recognizes Type UF cable is permitted for use underground, for branch circuits, and in attic spaces, but according to Section 340.12(1) Type UF cable is not allowed for use as service-entrance cable. Incorrect answer. Please choose another answer.

50.	Receptacles incorporating an isolated grounding conductor connection intended for the reduction of electrical noise, shall be identified by a/an _____ located on the face of the receptacle.
		a. red dot
		b. orange dot
		c. yellow happy face
		d. orange triangle
Receptacles incorporating an isolated grounding conductor connection, shall be identified by an orange triangle located on the face of the receptacle. Refer to Section 406.3(D). Incorrect answer. Please choose another answer.

51.	The lightning protection system ground terminals shall be bonded to _____.
		a. the grounded terminal bar at the main disconnecting means
		b. the ungrounded terminal bar at the main disconnecting means
		c. the building or structure grounding electrode system
		d. none of these, it shall be isolated from the building or structure
Section 250.106 specifies that the grounding electrode system of the lightning protection system be bonded to the electrical service grounding electrode system. Incorrect answer. Please choose another answer.

52.	The NEC mandates specific branch circuits, receptacle outlets and utilization equipment to be provided with a ground-fault circuit interrupter (GFCI); this device is intended ______.
		a. to prevent overloading the conductors
		b. to prevent overloading the circuit breakers
		c. for the protection of devices from overloads
		d. for the protection of personnel
Article 100, where definitions are found, reveals a ground-fault circuit interrupter is a device intended for the protection of personnel that functions to de-energize a circuit when a ground-fault occurs Incorrect answer. Please choose another answer.

53.	The MAXIMUM ampacity of an individual branch circuit in a flat conductor cable (FCC) assembly shall be _____ .
		a. 10 amperes
		b. 15 amperes
		c. 20 amperes
		d. 30 amperes
As per Section 324.10(B)(2), individual branch circuits of FCC systems shall have ratings not to exceed 30 amperes. Incorrect answer. Please choose another answer.

54.	The connection between the grounded circuit conductor and the supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived system is defined as the _____ in the NEC.
		a. system bonding jumper
		b. equipment bonding conductor
		c. grounding electrode conductor
		d. neutral conductor
As defined in Article 100, the system bonding jumper is the connection between the grounded circuit conductor and the supply-side bonding jumper, or the equipment grounding conductor, or both, at a separately derived system. This connection is permitted either at the source of the separately derived system or at the first disconnecting means supplied by the source. Incorrect answer. Please choose another answer.

55.	Receptacle outlets installed at a height of 16 inches above the floor in an unvented boat repair shop containing flammable liquids, are considered to be installed in a _____ hazardous location.
		a. Class I, Division 1
		b. Class I, Division 2
		c. Class II, Division 1
		d. unclassified
In compliance with Section 555.22, facilities for the repair of marine craft that contain flammable liquids or gases must also comply with the requirements mandated in Article 511. As per Section 511.3(C)(1)(b), receptacle outlets located 16 inches above the floor in an unvented vehicle repair shop containing flammable liquids, are considered to be installed in a Class I, Division 2 location. Incorrect answer. Please choose another answer.

56.	Conductor sizes addressed in the NEC are expressed in American Wire Gauge (AWG) or in _____.
		a. International Standard Gauge
		b. circular centimeters
		c. circular mills
		d. circular diameter
As indicated in Section 110.6, conductor sizes are expressed in American Wire gage (AWG) or in circular mils. Incorrect answer. Please choose another answer.

57.	Where a vertical raceway contains four (4) size 3/0 AWG copper conductors, the conductors shall be supported at intervals NOT greater than _____.
		a. 30 feet
		b. 60 feet
		c. 80 feet
		d. 40 feet
Table 300.19(A) shows where a vertical raceways contains size 3/0 AWG copper conductors, they are to be supported at intervals not greater than 80 feet. This requirement prevents the weight of the conductors from damaging the insulation where they leave the conduit and prevents the conductors from being pulled out of the termination lugs. Incorrect answer. Please choose another answer.

58.	A ground rod is required to be driven a MINIMUM depth of _____ into the earth.
		a. 4 feet
		b. 6 feet
		c. 8 feet
		d. 10 feet
To ensure an adequate grounding system and qualify as an effective grounding electrode, according to Section 250.53(G), all rod and pipe electrodes have at least 8 ft. of length in contact with the soil. Incorrect answer. Please choose another answer.

59.	Determine the ampacity of a size 3 AWG THHN copper conductor given the following related information: Three (3) current-carrying conductors are in the raceway. The ambient temperature is 35 deg. C. The terminations are rated at 60 deg. C.
		a. 105.6 amperes
		b. 85.0 amperes
		c. 81.6 amperes
		d. 110 amperes
Section 110.14(C) states the temperature rating associated with the ampacity of a conductor shall be selected so as not to exceed the temperature of any connected terminal. But, for conductors with a temperature rating with a higher value than that of the terminations, the higher value can be used for ampacity adjustment and correction. Prior to derating, Table 310.15(B)(16) shows size 3 AWG THHN copper conductors to have an ampacity of 115 amperes, which is to be multiplied by 0.96, due to the ambient temperature [selected from Table 310.15(B)(2)(a), where the temperature factors are shown]. Therefore the allowable ampacity is reduced to 110.4 amperes. However, since the terminations are rated for 60C, the ampacity of the conductor is to be selected from the 60C column, which shows the allowable ampacity to be 85 amperes. 3 AWG THHN ampacity before derating = 115 amperes (90 deg. C Col.) 115 amperes x .96 (temperature correction) = 110.4 amperes. 3 AWG (60 deg. C Col.) = 85 amperes is to be used. Incorrect answer. Please choose another answer.

60.	In general, overhead (aerial) communications wires and cables shall have a vertical clearance of NOT less than _____ from all points above roofs which they pass.
		a. 3 feet
		b. 4 feet
		c. 6 feet
		d. 8 feet
The general rule is, in order to prevent accidental contact and damage to communications wires and cables, as explained in Section 800.44(B), they are to have a vertical clearance of not less than 8 ft. from all points above roofs. Incorrect answer. Please choose another answer.

61.	Standard electrical trade size 2 in. rigid Schedule 40 PVC conduit shall be supported at LEAST every _____.
		a. 3 feet
		b. 5 feet
		c. 6 feet
		d. 10 feet
To ensure PVC conduit is secured and fastened in a stable and workmanlike manner, Table 352.30 indicates 2 in. Schedule 40 PVC is required to be supported at least every 5 ft. Incorrect answer. Please choose another answer.

62.	Where installed indoors, individual dry-type transformers of more than 112 kVA rating shall be installed in a transformer room of fire-resistant construction having a MINIMUM fire resistance rating of _____.
		a. 1 hour
		b. 2 hours
		c. 3 hours
		d. 4 hours
In compliance with Section 450.21(B), where located indoors, individual dry-type transformers of more than 112 kVA rating are to be installed in a transformer room of fire-resistant construction having a rating of not less than 1 hour. This requirement provides a confinement area and a degree of protection in the event of a fire or an accident. Incorrect answer. Please choose another answer.

63.	Where conductors carrying alternating current are installed in ferrous metal raceways, _____.
		a. all phase conductors, the grounded conductor and equipment grounding conductors shall be grouped together
		b. the phase conductors shall not be grouped with the grounded conductor
		c. the equipment grounding conductor is not permitted to be in the same raceway with the grounded and ungrounded conductors
		d. the equipment grounding conductor is not permitted to be installed in a common raceway with the grounded conductors
Section 300.20(A) addresses the problem of induction from ac conductors into ferrous (magnetic) metal enclosures and raceways. To prevent induced current where conductors are installed in ferrous metal raceways, all phase conductors, the grounded conductors and equipment grounding conductors should be grouped together. Induction into raceways and enclosures can lead to conductors overheating and creating a shock hazard. Incorrect answer. Please choose another answer.

64.	The NEC mandates the MAXIMUM length permitted for a flexible cord supplying a 208-volt, single-phase, room air-conditioner to be _____.
		a. 4 feet
		b. 6 feet
		c. 8 feet
		d. 10 feet
To minimize the length of unsightly cords, Section 440.64, mandates the maximum length permitted for a flexible cord supplying a 208-volt, single-phase, room air-conditioner to be 6 ft. Incorrect answer. Please choose another answer.

65.	Where a feeder tap is to be made at a high bay manufacturing building, overcurrent protection at the tap is not required, if the tap conductors are not over 100 feet total length and the tap is made NOT less than _____ from the floor.
		a. 25 feet
		b. 30 feet
		c. 35 feet
		d. 50 feet
Under this condition, Sections 240.21(B)(4)(2)&(9), permits a tap of 100 ft. for manufacturing buildings where the tap connection is made not less than 30 ft. from the floor and conditions of maintenance ensure that only qualified persons service these systems. Incorrect answer. Please choose another answer.

66.	Where rigid metal conduit (RMC) is used to protect a grounding conductor, the conduit MUST _____.
		a. be isolated from the grounding conductor
		b. be electrically continuous from cabinet to ground clamps
		c. be identified with green paint
		d. not be connected to or touching the ground clamp
As addressed in Section 250.64(E), ferrous metal enclosures that are not physically continuous from cabinets or equipment to the grounding electrode shall be made electrically continuous by bonding each end of the raceway or enclosure to the grounding electrode conductor. Bonding at both ends of the raceway ensures that the raceway and conductor are in parallel. These bonding connections are necessary so that the ferrous metal raceway does not create an inductive choke on the grounding electrode conductor. Incorrect answer. Please choose another answer.

67.	Which of the following circuits is prohibited for the grounded conductor to be dependent on receptacle devices for continuity?
		a. All circuits.
		b. Multi-outlet circuits.
		c. GFCI protected circuits.
		d. Multiwire branch circuits.
The intent of Section 300.13(B) is to permit the replacement of a receptacle without interrupting the continuity of the downstream grounded (neutral) conductor. Opening the neutral could cause unbalanced voltages and a higher voltage would be impressed on one part of a multiwire branch circuit. Also, when replacing a receptacle, this requirement helps to prevent personnel from becoming in series with the neutral conductor, which creates a shock hazard. Incorrect answer. Please choose another answer.

68.	All 125-volt, single-phase, 15- and 20-ampere receptacles installed in residential garages shall be _____. I) protected by a listed arc-fault circuit interrupter II) provided with ground-fault circuit interrupter protection
		a. I only
		b. II only
		c. both I and II
		d. neither I nor II
According to Section 210.8(A)(2), all single-phase, 125-volt, 15- or 20-ampere receptacles located in residential garages are required to be provided with ground-fault protection for personnel. This requirement improves safety for persons using portable handheld portable tools and similar tools that might be connected to these receptacles. GFCI protection is also required because auto repair work and maintenance is performed and workshop electrical tools are often used in the garage. There are no exceptions to this rule, regardless of where in the garage the receptacle is located or the equipment served. Most safety experts agree that GFCIs are directly responsible for saving numerous lives and preventing countless injuries. Section 210.12(A) lists the areas of a dwelling unit where all 120-volt, single phase, 15- and 20-ampere branch-circuits supplying outlets and devices are mandated to have AFCI protection. Residential garages are not are not included in this list. However, AFCI devices may also be capable of performing other functions such as overcurrent protection, ground-fault protection and surge suppression. Therefore, AFCI devices are certainly permitted to be installed in residential garages, but not required. Incorrect answer. Please choose another answer.

69.	Given: You are to install a transformer to supply a 208Y/120-volt, 3-phase, 243 ampere load. The transformer must have a kVA rating of at LEAST _____.
		a. 75 kVA
		b. 87 kVA
		c. 100 kVA
		d. 112 kVA
To solve this problem, first determine the VA of the transformer, then divide by 1000 to determine the kVA. 208 volts x 1.732 x 243 amperes = 87,542 VA 87,542 VA = 87.5 kVA 1000 Incorrect answer. Please choose another answer.

70.	Unless specifically permitted in the NEC, neutral conductors shall NOT be used for more than one_____.
		a. branch circuit
		b. multiwire branch circuit
		c. set of ungrounded feeder conductors
		d. all of these apply
Section 200.4(A) specifies that an individual neutral conductor be provided for each two-wire and multiwire branch circuit and feeder unless specifically permitted elsewhere in the NEC. The concern with multiple circuits sharing a common neutral conductor is the possibility of overloading the neutral conductor. Typically, the neutral conductor is not provided with overload protection therefore, when the neutral conductor is overloaded the conductor insulation can be damaged. Specific provisions covered in Sections 215.4 and 225.7 do permit multiple circuits to have a common or shared neutral conductor. Incorrect answer. Please choose another answer.

71.	Where an ac service is supplied with four (4) parallel sets of size 500 kcmil aluminum conductors, what is the MINIMUM size copper grounding electrode conductor required, when connected to a metal underground water line used as the grounding electrode system?
		a. 3/0 AWG
		b. 4/0 AWG
		c. 250 kcmil
		d. 2/0 AWG
The size of the grounding electrode conductor at an ac service is based on the size of the largest service-entrance conductor or equivalent area for parallel conductors as shown in Table 250.66. Therefore, size 500 kcmil aluminum x 4 conductors = 2000 kcmil total *NOTE- Aluminum service-entrance conductors over 1750 kcmil require a size 3/0 AWG copper grounding electrode conductor. Incorrect answer. Please choose another answer.

72.	Where an ac transformer arc welder has a 50 ampere rated primary current and a 60 percent duty cycle, determine the MINIMUM size copper 60 deg. C rated conductors required to supply this welder.
		a. 6 AWG
		b. 8 AWG
		c. 10 AWG
		d. 4 AWG
The loads on transformer arc welders are considered intermittent. Therefore, the minimum ampacity of the branch-circuit conductors is permitted to be determined by applying the percentage values shown in Table 630.11(A). This calculation is done by selecting the appropriate factor from the table, based on the duty cycle and type of welder, then multiply by the value of the welder rated primary current. The conductors are to be selected from Table 310.15(B)(16). .78 (duty cycle factor) x 50 amperes (primary current) = 39 amperes Table 310.15(B)(16) requires size 8 AWG 60C rated conductors. Incorrect answer. Please choose another answer.

73.	In general, cables or raceways shall be permitted to be laid in notches in wood studs where the cable or raceway at those points is protected against nails or screws by a steel plate at LEAST _____ thick.
		a. 1/16 in.
		b. 1/8 in.
		c. 1/4 in.
		d. 3/8 in.
In order to protect cables or raceways from mechanical damage from the penetration of nails and screws, the general rule of Section 300.4(A)(2) specifies where laid in notches of wood studs, the cable or raceways must be protected by a steel plate at least 1/16 in. thick. Incorrect answer. Please choose another answer.

74.	Where one or more single-phase, 125-volt, 15- or 20-ampere receptacle outlets are provided for the show window lighting in a retail store, the outlet(s) shall be installed within at LEAST _____ of the top of the show window.
		a. 30 inches
		b. 24 inches
		c. 18 inches
		d. 12 inches
To discourage the use of floor receptacles and unsightly extension cords likely to be damaged due to personnel tripping and walking on them, Section 210.62 requires receptacle outlets provided for show window lighting to be located within 18 in. of the top of the show window. Incorrect answer. Please choose another answer.

75.	Generally, at the location of all ground- and pole-mounted photovoltaic arrays and as close as practicable to roof-mounted PV arrays a/an _____ is required to be installed. I )auxiliary grounding electrode system II) single-phase, 125-volt, 15- or 20-ampere, GFCI protected receptacle
		a. I only
		b. II only
		c. both I and II
		d. II neither I nor II
A grounding electrode system has been required to be established for PV systems and PV arrays since the 1996 edition of the NEC. Section 690.47(D) makes it clear that ground, pole-mounted and roof-mounted PV arrays require an auxiliary grounding electrode system. The large quantity of conductive material that is added to a roof when a PV system is installed increases the likelihood of a lightning strike. This PV grounding electrode system would help to minimize the effects of such a lightning strike. The primary purpose of this PV grounding electrode is to maintain the frames of the PV array as close to local earth potential as possible. Another purpose of this PV grounding electrode system is to provide a simple and direct path for any static charge that may build up during a storm or lightning strike. At this time, the NEC does not address the issue of the need of a general-use receptacle to be located in close proximity to photovoltaic arrays. Incorrect answer. Please choose another answer.

76.	For the purpose of determining conductor fill in conduit, what is the total area, expressed in square inches, for the following combination of conductors? three - size 4/0 AWG THWN one - size 3/0 AWG THWN one - size 4 AWG THWN
		a. 1.3214 square inches.
		b. 1.6380 square inches.
		c. 1.8572 square inches.
		d. 1.2098 square inches.
Table 5 of Chapter 9 shows the various sizes and insulation of conductors expressed in millimeters and square inches in accordance with appropriate diameter and square inches. In most cases we relate to the approximate area in sq. in. on the right side of the table. This calculation is done by locating the sq. in. value of each conductor and multiply by the number of conductors. Next, add the values together as shown: 4/0 AWG THWN - .3237 sq. in. x 3 = .9711 sq. in. 3/0 AWG THWN - .2679 sq. in. x 1 = .2679 sq. in. 4 AWG THWN - .0824 sq. in. x 1 = .0824 sq. in. TOTAL 1.3214 sq. in. Incorrect answer. Please choose another answer.

77.	Where a 3-phase rooftop mounted air conditioning unit is supplied by three (3) size 6 AWG THWN copper conductors installed in a 1 in. EMT, determine the allowable ampacity of the conductors, where given the following related information: ambient temperature is 110F the EMT is located within three (3) inches of the roof surface the EMT is exposed to direct sunlight
		a. 53.00 amperes
		b. 37.70 amperes
		c. 21.45 amperes
		d. 43.55 amperes
Due to the close proximity of the conduit to the rooftop, first find the temperature adder, 40 F, as shown in Table 310.15(B)(3)(c). Then, add this value to the ambient temperature. 110F (ambient temperature) +40F (adder) 150F (to be used for derating) Next, locate the temperature correction factor to be applied, 0.33, from Table 310.15(B)(2)(a). Finally, multiply 0.33 x 65 amperes, the allowable ampacity of size 6 AWG THWN copper conductors before derating, as indicated in Table 310.15(B)(16). Size 6 AWG THWN ampacity (before derating) = 65 amperes 65 amperes x .33 (temperature correction) = 21.45 amperes Incorrect answer. Please choose another answer.

78.	In general, the disconnecting means for motor circuits rated 1000 volts or less, shall have an ampacity of at LEAST _____ of the full-load current rating of the motor it disconnects.
		a. 100 percent
		b. 115 percent
		c. 125 percent
		d. 150 percent
As per Section 430.110(A), the disconnecting means for motor circuits rated 1000 volts or less, shall have an ampacity of at least 115% of the full-load current rating of the motor. Incorrect answer. Please choose another answer.

79.	In general, where feeder conductors of not more than 600 volts supply a continuous load of 240 amperes, the conductors are required to have an ampacity of at LEAST _____.
		a. 192 amperes
		b. 240 amperes
		c. 300 amperes
		d. 276 amperes
The general rule for feeder conductors of not more 600 volts, supplying continuous loads is, the conductors are to have an ampacity of not less than 125% of the full-load current of the load to be served. Reference Section 215.2(A)(1)(a). Incorrect answer. Please choose another answer.

80.	Determine the MINIMUM number of 20-ampere, 120-volt general lighting branch circuits required for a 12 unit apartment building that is 12,000 sq. ft. in size. The apartment building is not designed for permanent residents and does not contain cooking facilities.
		a. 12
		b. 24
		c. 14
		d. 10
Section 220.12 requires a unit load of not less than that specified in Table 220.12 is to be used for determining the minimum general lighting load. Multiply this value by the sq. ft. of the occupancy. 12,000 sq. ft. x 2 VA = 24,000 VA (building lighting VA) Next, find the VA of one circuit by multiplying volts x amperes. 120 volts x 20 amperes = 2,400 VA (one circuit VA) Finally, divide the load, 24,000 VA, by one circuit, 2,400 VA. 24,000 VA (blg.) 2,400 VA (one circuit) = 10 general lighting circuits Incorrect answer. Please choose another answer.

81.	Where an 80 ampere, 240-volt, single-phase load is located 200 feet from a panelboard and is supplied with size 3 AWG copper conductors with THWN insulation, what is the approximate voltage drop on this circuit? (K = 12.9)
		a. 6 volts
		b. 4 volts
		c. 9.2 volts
		d. 7.84 volts
To determine the voltage drop on this circuit, first locate the circular mil area of the conductors (52,620 CM) as indicated in Table 8 of Chapter 9. Then, apply the single-phase voltage drop formula: VD = 2KID VD = 2 x 12.9 x 80 amps x 200 ft. = 7.84 volts CM 52,620 CM Incorrect answer. Please choose another answer.

82.	Enclosures in a Class I, Division 1 location containing components that have arcing devices must have an approved seal located within at LEAST _____ of each conduit run entering or leaving such enclosures.
		a. 12 inches
		b. 18 inches
		c. 24 inches
		d. 30 inches
Where installed in Class I, Division 1 locations, Section 501.15(A)(1) requires conduit seals to be installed within 18 in. of enclosures containing components that have arcing devices. This requirement for the location of conduit seals is to prevent an explosion from traveling through the conduit and to minimize the passage of gasses or vapors from hazardous locations to nonhazardous locations. Incorrect answer. Please choose another answer.

83.	In general, battery back-up exit luminaires (unit equipment) shall receive power from _____.
		a. the branch circuit that supplies normal power circuits
		b. a separate dedicated lighting branch-circuit
		c. a branch-circuit supplying receptacles only
		d. the branch circuit serving the normal lighting in the area
In accordance with Section 700.12(F)(2)(3), the branch circuit feeding the unit equipment shall be the same branch circuit as that serving the normal lighting in the area and connected ahead of any local switches. Unit equipment is intended to provide illumination for the area where it is installed. For instance, if an emergency lighting unit is located in the hallway of a school building, it must be unswitched and connected to the branch circuit supplying the normal hallway lights. Unit equipment is designed to automatically energize the unit luminaire lamps, restoring illumination to the hallway in the event of normal power failure. Incorrect answer. Please choose another answer.

84.	The NEC considers the area around the outdoor motor fuel dispensing pumps of a service station to be a hazardous location. This area extends to a height of 18 in. above grade, and up to a distance from the enclosures of the fuel dispensing pumps of _____.
		a. 5 feet
		b. 10 feet
		c. 16 feet
		d. 20 feet
Both Table 514.3(B)(1) and Figure 514.3 recognize an area of 20 ft. around outdoor motor fuel dispensers to be a hazardous location. Incorrect answer. Please choose another answer.

85.	When two (2) ground rods are bonded together, the grounding conductor that bonds the two rods together shall NOT be required to be larger than size _____ copper, regardless of the size of the service-entrance conductors.
		a. 8 AWG
		b. 6 AWG
		c. 4 AWG
		d. 2 AWG
Where a grounding electrode conductor is connected to a ground rod, or where two or more ground rods are bonded together, Section 250.66(A) permits the conductor to be sized at not larger than 6 AWG copper. Incorrect answer. Please choose another answer.

86.	Where a dwelling unit has a demand load of 8 kVA and a total of six (6) branch circuits, the service disconnecting means shall have a rating of NOT less than _____.
		a. 60 amperes
		b. 40 amperes
		c. 100 amperes
		d. 125 amperes
Refer to Section 230.79(C) and find the service disconnecting means for a for a dwelling is to have a rating of not less than 100 amperes. Incorrect answer. Please choose another answer.

87.	When a building has a 208Y/120-volt, 3-phase, 4-wire service with a balanced net computed load at 90 kVA, determine the current each ungrounded (phase) conductor will carry at full-load.
		a. 188 amperes
		b. 250 amperes
		c. 433 amperes
		d. 750 amperes
To solve this problem, apply the 3-phase current formula: I = Power Volts x 1.732 I = 90 kVA x 1000 = 90,000 VA = 250 amperes 208 volts x 1.732 360.25 Incorrect answer. Please choose another answer.

88.	When a circuit breaker is used as the disconnecting means for a 20 hp, 480-volt, 3-phase, continuous-duty motor, the circuit breaker shall have an ampere rating of at LEAST _____.
		a. 31.05 amperes
		b. 33.75 amperes
		c. 39.10 amperes
		d. 67.50 amperes
First, locate the full-load current of the motor, 27 amperes, from Table 430.250 next, multiply by 115%, as per Section 430.110(A). FLC of motor = 27 amperes x 115% = 31.05 amperes Incorrect answer. Please choose another answer.

89.	Which of the following is NOT permitted in cable trays of industrial establishments?
		a. Nonmetallic sheathed cable.
		b. Multi-conductor service-entrance cable.
		c. Individual ungrounded conductors smaller than 1/0 AWG.
		d. Multi-conductor underground feeder and branch circuit cable.
In compliance with Section 392.10(B)(1)(a), ungrounded single-conductor cable installed in cable trays shall be 1/0 AWG or larger. Incorrect answer. Please choose another answer.

90.	Storage batteries for legally required standby systems shall have the capacity to maintain not less than 87 percent of the system voltage of the circuits supplying the legally required standby power for a period of at LEAST _____ upon loss of the normal power.
		a. 1 hour
		b. 1 hours
		c. 2 hours
		d. 45 minutes
As covered in Section 700.12, an approved supply system for legally required standby purposes, in addition to the normal services to the building, may be a storage battery back-up system. Section 700.12(A) requires a storage battery to have a suitable rating and capacity to supply and maintain not less than 87 percent of system voltage the total load of the circuits supplying legally required standby power for a period of not less than 1 hours. Legally required systems are intended to provide electric power to municipal first responders such as fire stations, sheriff offices, highway departments, police stations and similar operations to aid in fire fighting, emergency situations, rescue operations and control of health hazards. When normal power is lost, legally required systems must be able to supply standby power in 60 seconds or less. Incorrect answer. Please choose another answer.

91.	According to the NEC®, service conductors that supply a building are permitted to pass through the interior of another building _____.
		a. when the conductors are installed in metal conduit
		b. when the conductors pass through the attic of another building
		c. if the conductors have a temperature rating of not less than 90 C
		d. never
Section 230.3 prohibits service conductors supplying a building from passing through the interior of another building. Although service conductors that supply one building are prohibited from being run through the interior of another building, service conductors are permitted to be installed along the exterior of a building to supply another building. Incorrect answer. Please choose another answer.

92.	Where fuses are used for motor overload protection, if the supply system is a 3-wire, 3-phase, ac with one conductor grounded, the NEC requires a MINIMUM of _____ fuses.
		a. none
		b. one
		c. two
		d. three
According to Section 430.36, where fuses are used for motor overload protection, all 3-phase motors must be provided with 3 overload units, one in each phase. Incorrect answer. Please choose another answer.

93.	A 120/240-volt, single-phase feeder of a retail department store is to supply a noncontinuous load of 18,000 VA and a continuous load of 13,356 VA. What MINIMUM size 75 deg. C copper conductors are required for this installation?
		a. 4/0 AWG
		b. 1/0 AWG
		c. 2/0 AWG
		d. 3/0 AWG
In compliance with Section 215.2(A)(1)(a), feeder conductors are to have an ampacity of 100% of the continuous loads, plus 125% of the continuous loads. Therefore: 18,000 VA x 100% = 18,000 VA 13,356 VA x 125% = 16,695 VA 34,695 VA total To find the load, apply the single-phase current formula: I = 34,695 VA = 144 amperes 240 volts As shown in Table 310.15(B)(16), size 1/0 AWG conductors with an allowable ampacity of 150 amperes should be selected. Incorrect answer. Please choose another answer.

94.	A dry-type transformer of less than 1000 volts and _____ is permitted to be installed in a hollow space of a building, such as above an accessible lift-out ceiling, provided there is adequate ventilation.
		a. 25 kVA
		b. 37 kVA
		c. 50 kVA
		d. 112 kVA
As permitted by Section 450.13(B), transformers rated 1000 volts or less and not exceeding 50 kVA may be installed in hollow spaces of hung ceiling areas, provided these spaces are fire resistant, ventilated and accessible. Incorrect answer. Please choose another answer.

95.	What other purpose is permitted by the NEC for a grounding screw in a metal box used to connect the grounding conductor?
		a. Connecting the grounded conductor.
		b. Support for cable clamps.
		c. Securing extension rings.
		d. The NEC permits no other purpose.
Section 250.148(C), mandates a grounding screw shall be used for no other purpose than connecting the equipment grounding conductor. Incorrect answer. Please choose another answer.

96.	Given: Type UF cable is to be used for direct buried residential branch circuits of 120-volts. The conductors are GFCI protected and overcurrent protection is rated 20-amperes; the cables do not cross under any driveways or concrete. What is the MINIMUM permitted burial depth of the cable?
		a. 6 inches
		b. 12 inches
		c. 18 inches
		d. 24 inches
When considering these conditions, Column 4 of Table 300.5, indicates the minimum burial depth of the Type UF cable to be 12 inches. Incorrect answer. Please choose another answer.

97.	Type AC cable shall be permitted _____.
		a. for feeders
		b. in wet locations
		c. where exposed to physical damage
		d. in damp locations
Section 320.10(1) recognizes Type AC cable is permitted for use as feeders. But, Sections 320.12(1)&(2) do not permit Type AC cable to be used in damp or wet locations and where subject to physical damage. Incorrect answer. Please choose another answer.

98.	Floor-mounted Type FCC cable shall be covered with carpet squares NOT larger than _____.
		a. 12.75 inches square
		b. 24.25 inches square
		c. 36.00 inches square
		d. 39.37 inches square
The carpet squares covering Type FCC cable are not permitted to be larger than 39.37 inches (1.0 m) square, to comply with Section 324.41. This limitation provides ready access to the cable by lifting a carpet square. It also reduces the likelihood of damage to the cable by personnel cutting through the carpet above the cable and penetrating the top shield of the cable. Type FCC (flat conductor cable) is a wiring system currently in use in many offices. Type FCC is prohibited for use in residential, school and hospital buildings. Incorrect answer. Please choose another answer.

99.	When installing Type NM cable through bored holes in wooden studs, the holes shall be bored so that the edge of the hole is NOT less than _____ from the nearest edge of the wood member, unless the cable is protected by a steel plate.
		a. in.
		b. 1 in.
		c. 1 in.
		d. 1 in.
The intent of Section 300.4(A)(1) is to prevent nails and screws from being driven into the cables when installing the wallboard. Where the NM cable is installed through bored holes in wood studs where the edge of the hole is not less than 1 in. from the nearest edge of the wood member, the likelihood of the cable being damaged due to the penetration of nails and screws is greatly reduced. Incorrect answer. Please choose another answer.

100.	Luminaires mounted in walls of permanently installed swimming pools, shall be installed with the top of the luminaire lens NOT less than _____ below the normal water level of the pool, unless the luminaire is listed and identified for use at lesser depths.
		a. 4 inches
		b. 6 inches
		c. 12 inches
		d. 18 inches
The purpose of the 18 inch submergence requirement for luminaires, as addressed in Section 680.23(A)(5), is to reduce the likelihood that a person in the water and hanging onto the side of the pool directly in front of the luminaire will have his or her chest in line with the luminaire. The highest level of leakage current in a pool coming from a wet-niche luminaire with a broken lens and bulb is found directly in front of the luminaire. This rule helps to reduce the possibility of a shock hazard occurring. Incorrect answer. Please choose another answer.