Open Book Question (#3)

A fixture rated at 7 amps requires a size _______ minimum fixture wire. a. #16 b. #18 c. #14 d. #12

a. #16 minimum Table 402.5

All 125 volt single phase receptacles within ______ feet of the inside walls of a hydromassage tub shall be protected by a ground fault circuit interrupter(s). a. 6 b. 10 c. 12 d. none of these

a. 6 feet 680.71

To settle a disagreement between an inspector and a contractor foreman, the ______ would have the final say. a. local authority having jurisdiction b. local electrical board c. the IBEW d. the engineer

a. AHJ 90.4

Several motors, each not exceeding 1 horsepower in rating, shall be permitted on a nominal 120 volt branch circuit protected at not over ______ amperes. a. 15 b. 20 c. 30 d. 40

b. 20 amps 430.53(A)

Flexible cords _____ and larger are used to supply approved appliances and are considered protected from overcorrect by overcurrent devices. a. #18 b. #16 c. #14 d. #12

a. #18 400.16

Type UF cable is manufactured in sizes #14 through #________ copper. a. 4/0 b. 4 c. 6 d. 10

a. #4/0 copper 340.104

A bathroom in a dwelling has a counter space of seven feet including the sink. How many receptacles are required to serve this area? a. 1 b. 3 c. 4 d. none are required

a. one is required 210.52(D)

The maximum number of 15 amp receptacles permitted on a free standing office partition is a. 10 b. 13 c. 2 d. 6

b. 13 receptacles 605.9(C)

A household-type appliance with surface heating elements having a maximum demand of more than _____ amperes computed in accordance with Table 220.19 shall have its power supply subdivided into two or more circuits, each of which is provided with overcorrect protection rated at not over ________ amperes. a. 40-40 b. 50-40 c. 50-60 d. 60-50

d. 60-50 422.11(B)

Where the overcurrent device is rated over ______ amperes, the ampacity of the conductors it protects shall be equal to or greater than the rating of the overcurrent device. a. 100 b. 200 c. 500 d. 800

d. 800 amps 240.4(C)

Panelboards, switches, gutters, sideways or transformers are permitted to be mounted above or below one another if a. rated 300v or less b. flush along the back edge c. they extend not more than 6 inches beyond the front of the equipment d. flush along the front edge

c. they extend not more than 6 inches beyond the front of the equipment 110.26(A3)

The maximum percent of overcurrent protection allowed is ______ of the input current to an autotransformer when less than 9 amps. a. 167% b. 150% c. 300% d. 125%

a. 167% 450.4(A) ex.

An installation requires a device box with a capacity of 10.25 cubic inches. What is the minimum size box allowed? a. 2" x 2" x 3" b. 3" x 2" x 2 1/4" c. 3" x 2" x 2" d. 2" x 3 x 3"

b. 3" x 2" x 2 1/4" Table 314.16(A)

For an installation consisting of not more than two 2-wire branch circuits, the service disconnecting means shall have a rating of not less than _______ amperes. a. 20 b. 30 c. 60 d. 100

b. 30 amps 230.79(B)

To ensure effective continuity between enclosures ______ shall be removed from the conduit threads. a. ends b. enamel c. galvanize finish d. aluminum

b. enamel 250.96(A)

Thermoplastic-insulated fixture wire shall be durably marked with the AWG size, voltage rating and other required markings on the surface at intervals not exceeding ______ inches. a. 6 b. 12 c. 18 d. 24

d. 24" 402.9(A)

The residual voltage of a capacitor shall be reduced to _______ volts, nominal, or less with a 1 minute after the capacitor is disconnected form the source of supply. a. 0 b. 15 c. 30 d. 50

d. 50 volts 460.6(A)

Each autotransformer of 1000 volts or less hall be protected by an individual overcurrent device installed in series with each ungrounded conductor and I. The overcurrent device shall be rated or set at not more than 125% of the rated full load input current of the autotransformer II. an overcurrent device shall be installed in series with the shunt winding common to both the input and output circuits if the autotransformer a. I only b. II only c. I and II d. neither I nor II

a. I only 450.4(A)

A lighting fixture under a canopy is considered to be in a ______ location. a. damp b. wet c. dry d. hazardous

a. damp location DEF 100

A complete lighting unit consisting of a lamp or lamps together with the parts designed to distribute the light, to position and protect the lamps and ballast, and to connect the lamps to the power supply is a a. luminaire b. class I , division I light fixture c. class I, division II light fixture d. intrinsically safe light fixture

a. luminaire DEF 100

When derating the ampacity of multi conductor cables to be installed in cable tray, the ampacity duration shall be based on I. the total number of current carrying conductors in the cable tray II. the total number of current carrying conductors in the cable a. I only b. II only c. either I or II d. both I and II

b. II only 392.80(A1a)

Resistors and reactors for use over 600 volts, shall not be installed in close enough proximity to combustible materials to constitute a fire hazard and shall have a clearance of not less than ______ from combustible materials. a. 6" b. 1' c. 18" d. 2'

b. one foot = 12" 470.18(C)

Of the two to six service disconnecting means in a panel, only a disconnect used for ______ is permitted to be remote from the other disconnects. a. control wiring b. a water pump intended for fire protection c. elevator panels d. supply to across the line starting

b. water pump intended for fire protection 230.72(A) ex.

The minimum size service lateral to a branch circuit limited load is ______ copper. a. #8 b. #10 c. #12 d. none of these

c. #12 copper 230.31(B) ex.

Strut-type channel raceway shall be secured at intervals not exceeding ______ feet and within 3 feet of each outlet box. a. 3 b. 4 1/2 c. 10 d. 12

c. 10' 384.30

A dry type transformer not rated over 112 1/2 ova installed indoors, shall have a separation of at least ______ inches from combustible material. a. 24 b. 18 c. 12 d. 6

c. 12" 450.21(A)

______ is/are considered as service equipment by the NEC. I. Meter socket enclosure II. Service disconnecting means III. Panelboard a. I only b. I and II only c. II and III only d. I, II, and III

c. II & III 230.66

To reach a lighting fixture junction box you had to stand on a ladder. This junction box is considered to be a. concealed b. readily accessible c. accessible d. hidden

c. accessible DEF 100

A/an _______ shall be used to connect the gournding terminal of a grounding type receptacle to a grounded box. a. neutral conductor b. branch circuit c. equipment bonding jumper d. bonding jumper main

c. equipment bonding jumper 250.146

In no case shall the distance between supports of nonmetallic wireway exceed ______ feet. a. 3 b. 5 c. 8 d. 10

d. 10' 378.30(A)

A 2400 volt lead cable can be bent up to _______ times its diameter. a. 6 b. 8 c. 10 d. 12

d. 12 times 300.34

Medium voltage cable insulation is rated for voltages ______ volts and higher. a. 150 b. 600 c. 1000 d. 2001

d. 2001 volts 328.2

A show window is calculated at ______ va per linear foot. a. 180 b. 1500 c. 1800 d. 200

d. 200va 220.14(G2)

Battery stands shall be permitted to contact adjacent walls or structures, provided that the battery shelf has a free air space for not less than ______ of its length. a. 45% b. 70% c. 80% d. 90%

d. 90% 480.10(C)

Size #18 or #16 fixture wires and flexible cords shall be permitted for the control and operating circuits of X-ray and auxiliary equipment where protected by not larger than ______ ampere overcurrent device. a. 15 b. 20 c. 25 d. 30

b. 20 ampere 660.9

Synchronous motors of the low torque, low speed type, such as are used to drive reciprocating compressors, pumps, etc., that start unloaded, do not require a fuse rating or circuit breaker setting in excess of _______ percent of full load current. a. 150 b. 200 c. 250 d. 400

b. 200% Table 430.52 note 3

Where more than one building or other structure is on the same property and under single management, each building or other structure served shall be provided with means for disconnecting all ______ conductors located nearest the point of entrance of the supply conductors. I. grounded II. Ungrounded III. ungrounded and grounded a. I only b. II only c. III only d. I, II, III

b. II only 225.31

A steel cable tray of .79 square inches is used as an equipment ground conductor. The maximum rating of the circuit breaker permitted for this application is _______ amps. a. 1000 b. 600 c. 200 d. 400

c. 200 amps Table 392.60(A)

Transformer vaults shall have adequate structural strength and a minimum fire resistance of at least _______ hours. Unless protected by automatic sprinklers. a. 6 b. 1 1/2 c. 3 d. not required

c. 3 hours 450.42

The sum of the diameters of all single conductors shall not exceed ______ when installed in a ventilated channel cable tray 4 inches inside width. a. 2 inches b. 3 inches c. 4 inches d. none of these

c. 4" 392.22(B) & T.392.22(A)(5)

Where single phase loads are connected on the load side of a phase converter, they shall not be connected to the a. high leg b. grounded phase c. manufactured phase d. neutral

c. manufactured phase 455.9

Fuses shall be plainly marked with I. ampere rating II. voltage rating III. interrupting rating where other than 10,000 amperes a. I only b. I & II only c. I & III only d. I, II & III

d. I, II, & III

Where fluorescent lighting fixtures are supported independently of the outlet box, they shall be connected by metal raceways, nonmetallic or _______ may be used. I. nonmetallic sheathed cable (Romex) II. MI cable III. AC cable IV. MC cable a. I and II only b. II and III only c. III only d. I, II, III, and IV

d. I, II, III & IV 410.24(A)

A bonding jumper shall be used to connect the equipment grounding conductors of the derived system to the grounded conductor. This connection shall be made I. at any point on the separately derived system form the source to the first system disconnect II. at any point on the separately derived system from the source to the first overcurrent device III. at the source if the system has no disconnecting means or overcurrent device a. I only b. II only c. III only d. I, II or III

d. I, II, or III 250.30(A1)

The term pool includes swimming, wading and therapeutic pools and the term fountain includes I. ornamental pools II. drinking fountains III. display pools IV. reflection pools a. I & II only b. II & III only c. III & IV only d. I, III, & IV only

d. I, III & IV 680.2

In other than dwellings, _____ must have GFCI protection in a commercial building. a. sinks b. outdoor receptacle c. bathroom receptacle d. all of these

d. all of these 210.8(B1-5)

Which of the following does not require a switched outlet according to the NEC? a. walk through garage door b. walk through porch door c. attic entrance d. drive through garage door

d. drive through garage door 210.70(A2)(2)

The highest current at rated voltage that a device is intended to interrupt under standard test conditions is know as a. overload b. inverse time rated c. thermal protector d. interrupting rating

d. interrupting rating DEF 100

Aluminum fittings and enclosures shall be permitted to be used with a. both ferrous and nonferrous conduits b. PVC schedule 80 conduit c. electrical nonmetallic tubing d. steel electrical metallic tubing

d. steel EMT 358.14

Where necessary to prevent ______, an automatic overcurrent device protecting service conductors suppling only a specific load, such as a water heater, shall be permitted to be locked or sealed where located so as to be accessible. a. tripping b. corrosion c. heat build up d. tampering

d. tampering 230.93