Set 1 Part 1 of exam question
what is the smallest size service conductor allowed to supply limited loads of a single branch circuit such as controlled water heaters and the like? a. #14 b. #12 c. #10 d. #8
#12 230.23 B overhead 230.31 B underground
Any sign installed inside of a fountain shall be at least ______________ inside the fountain, as measured from the outside edge of the fountain? a. 10 ft b. 5 ft c. 15 ft d. electric signs are not allowed inside fountains
b. 5 feet 680.57 c 1
the maximum number of #12 AWG THHN allowed to be installed in a 2"x3"x2 1/2" deep box with a dimmer switch is ___________________? a. 1 b. 2 c. 3 d.4
c. 3 314.16 A table 12 awg =5 314.16B4 -2 (for device) 3 total
IN addition to, or in lieu of, the mechanical fastening means required by the NEC, electric luminaires containing ballasts the Massachusetts Electrical Code requires the luminaire: a. shall be supported at each end of a diagonal axis. b. shall be supported at four points c. shall be supported by two threaded rods d. shall not require additional support Solution MEC Article 410.36(b)
A. shall be supported at each end of a diagonal axis 410.36B MA Amend
Branch Circuit conductors installed in flexible metalic tubing shall operate at ____________ volts maximum? A. 600 B. 1000 C. 480 D. 120
B. 1000 360.10
A capacitor is connected to a motor to provide power factor correction; the conductor feeding the capacitor shall have an ampacity of at least _______________% of the rated current of the capacitor. A. 115 b. 125 c. 135 d. 150
C. 135 430.22 ->460.8A
Which of the following is considered a wet location? a. underground b. basement c. roofed open porches d. dwelling unit under construction
a. underground definitions - locations wet
a 200 ampere feeder circuit conductors are increased in size from 3/0 AWG copper up to 250 KCMIL copper. what size copper equipment grounding conductor is required? a. #6 b. #4 c. #8 d. #1
answer b #4 amount of increase = wire sized used/wire size required from table 8 250000/ 167800 = 1.489 find minimum size grounding conductor in 250.122 which is #6 at 200 amps per the question. back at table at the circ mills for #6 is 26240 26240x 1.489= 39097.6 from table 8 that equates to a #4
A store entrance has a neon tube outline sign that draws 12 ampere, what is the minimum size branch circuit allowed to feed the sign? a. ampere b. 20 ampere c. 30 ampere d. must be size as a feeder because the sign circuit must terminate in an external disconnect
b. 20 ampere 600.5
An office is heated by 10 -2kw radiate heating panels each is thermostatically controlled and has an air conditioner that draws 50 ampere at 240 volt 10 for feeder calculations what is the total load for the feeder a. 12kw b. 20kw c. 25 kw d. 32 kw
b. 20kw start 220.1 ->part III - 220.60 non coincidental load heat - 10 2 kw/p =20Kw a/c w = e x i w = 240 x 50 = 12 kw then add 125% of AC load w = 240 x 62.5 = 15 kw
The combined load of two 240-volt fixed electric space heaters connected to a 30 ampere branch circuit should not exceed ________________ amperes? a. 30 amperes b. 24 amperes c. 20 amperes d. 25 amperes
b. 24 amperes 30 amp x .80 424.4
if a 240 volt electric water heater draws 16.6 amperes, what is the maximum size overcurrent device permitted for this circuit? A. 20 amperes b. 25 amperes c. 30 amperes c. 35 amperes
b. 25 amperes 16.6 x 150% 422.11 (E)(3) 240.6 A table
Unpowered equipment or equipment powered by the coaxial cable in a CATV system shall be considered grounded where ______________________ ? a. A separate equipment grounding conductor is run to the equipment. b. Connected to the metallic cable shield c. not required to be grounded d. connected to a separate ground rod
b. Connected to the metallic cable shield 820.103
Rigid Metal Conduit, 1 1/2 trade size with threaded couplings, installed in a straight run horizontally is permitted to be supported at which of the following intervals? a. 10ft b. 12 ft c. 14 ft d. 16 ft
c. 14 ft Table 344.30(B)(2)
the heating element in an electric water heater is rated for 4-kw @ 240-volts. How much current does it draw? A. 17.4 amperes B. 18.18 amperes C. 16.6 Amperes D. 19.23 Amperes
c. 16.6 amperes calculation 4000/240
What is the minimum size E.M.T. required for the installation of three #4/0 A.W.G and Three #2/0 AWG copper conductors with THW insulation in a raceway that measures 25 feet in length? A. 3 - inch B. 1 1/2 inch c. 2 1/2 inch d. 2 - inch
c. 2 1/2 inch chapter 9 table 5 4/0 .3718 x 3 = 1.1154 2/0 .2624 x 3 = .7872 = 1.9026 table 4 over 2 wires answer 2 1/2
a 3-phase squirrel cage induction motor has its shaft turning in a counter-clockwise direction. the shaft of this motor can be made to turn in the clockwise direction by: a. rotation the connections of all three supply wires one terminal clockwise b. rotation the connections of all three supply wires one terminal counter-clockwise c. reversing the terminal connections of any two supply wires d. turn the motor in the opposite direction
c. reversing the terminal connections of any two supply wires. (Practical part - change any 2 leads)
a raceway contains a 480-volt branch circuit and a 120-volt branch circuit. which of the following is a true statement. a. these circuits are not permitted to be installed in the same raceway. b. the race must be metalic c. the insulation of all conductors shall have a voltage rating at least equal to the maximum voltage applied to any conductor within the raceway., d. none of the above
c. the insulation of all conductors shall have a voltage rating at least equal to the maximum voltage applied to any conductor within the raceway 300.3(c)(1)
the maximum length of a supply cord used to connect a kitchen waste disposer shall not exceed ______________ in length? a. 18 inches b. 24 inches c. 36 inches d. 48 inches
c. 36 inches 422.16 (B)(1)
the minimum size of A steel plate electrode shall ________________and be at least ____________ in thickness. a. 1 ft x 1 ft - 1/4 in b. 1 ft x 2 ft - 1/4 in c. 2 ft x 2 ft - 1/4 in d. 1 ft x 2 ft - 0.60 in
1 ft x 1 ft - 1/4 in 250.52 A 7 plate electrodes 1 ft squared 12 x2 = 1 ft squared 2ft squared 1/4'
in dwelling units, a multiwire branch circuit supplying more than one device or equipment on the same yoke shall be proved with: 1. A means to disconnect simultaneously all ungrounded conductors at panelboard 2. A means to disconnect simultaneously all conductors of the circuit including the neutral. a. 1 only b. 2 only c. both 1 and 2 d. neither 1 or 2
1 only 210.4b
to meet the requirements of code, gaps or open spaces greater than _________________ at the edge of the box installed in plaster, drywall, or plasterboard employing a flush-type cover or faceplate shall be repaired. a. 1/8" b. 1/4 " c. 3/8" d. 1/2"
1/8" 314.21
when installing an outlet for an intercom near a swimming pool how close to the water installed allowed by code? a. 5 feet b. 6 feet c. 8 feet d. 10 feet
10 feet 680.22 D
When Calculating the requirements for a service fixed electric space heating shall be calculated at ___________________% a. 80% b. 100% c. 115% d. 125%
100% Part III from scope 220.51
When installing service equipment for mobile homes, the service equipment shall be located in sight from and not more than _______________ feet from the exterior wall of the mobile home it serves. a. 30 b. 20 c. 15 d. 10
30 550.32 (a)
given: source voltage = 480 volts voltage @ load = 460 volts Load current @ 460 volts= 16 amperes distance between source and load = 2500 feet what is the total resistance of the circuit conductors supplying this load? a. 75-ohms b. 1.25- ohms c. 2.50 - ohms d. 2.00 - ohms
480 source - 460 load = 20 R= E/I R = 20/16 R= 1.25 Ohms 200.6 (A) and (b)
Ten #500 KCMIL THHN copper conductors are installed in a raceway. what is the maximum amount of current permitted to flow in each conductor? a. 400 amperes b. 380 amperes c. 215 amperes d. 500 amperes
Answer C 110.14 C 13 not to exceed 75 degrees greater than #1 wire 310.16 90 degree is 430 amps but cannot exceed the 75 degree column 310.16 note 2 look at table 310.15 c 1 to derate for 10 wires 430X.5 = 215 derate of the conductor actual ampacitiy
where a lighting outlet (light fixture) is installed in a dwelling unit interior stairwell there shall be a wall switch at each floor level if the stairway between levels EXCEEDS _______________ risers? A. 6 B. 5 C. 10 D. 1
B. 5 210.70(A)(2)(3)
In portions of dairy processing facilities, laundries, canneries, and other indoor wet locations, the entire wiring system, where installed exposed, including all boxes, fittings, raceways and cable used therewith, shall be ____________________. a. to be plastic covered. b. to be space 1/4" off the wet surface c. both A & B d. neither A or B
B. to be spaced 1/4" off the wet surface. 300.6D 312.2
What is the minimum number of 20 Ampere Circuits required for a single family dwelling with a 2000 sqft floor area? A. 2 B. 3 C. 4 D. 5
C. 4 210.11(C)
A two speed motor requires six current conductors, to compensate for voltage drop, 8 AWG THHN conductors are used from the motor to the controller, what size rigid steel conduit is needed for the 6 conductors? a. 1 1/2" b. 1 1/4" c. 1" d. 3/4"
D. 3/4 344.22 -> chapter 9 table -> note 1 -> annex C
what is the maximum length a dwelling unit hallway is permitted to be before a receptacle outlet is required? A. 10 ft. B. 25 ft C. 6 ft D. 9 ft
D. 9ft 210.52 H
Transformers are filled with oil to ______________________ a. cool them only b. insulate them only c. prevent freezing d. insulate and cool them
D. insulate and cool them (practical not in cool them)
What is the maximum load permitted to be cord and plug connected to a 15 ampere rated receptacle installed in a multi-outlet 20 ampere rated circuit? a. 12 amperes b. 16 amperes c. 18 amperes d. 10 amperes
a. 12 amperes 210.21 (B)(2)
Receptacles that provide power for boats shall be of the locking and grounding types and shall be rated not less than? a. 30 amps b. 20 amps c. 40 amps d. 50 amps
a. 30 amps art 555.33 A4
outlet boxes installed in ceilings or walls constructed of wood or other combustible surface material shall be mounted so that the front edge of the box assembly will be ____________________________ the finished surface? a. flush with b. set back not more than 1/8" from c. set back not more than 1/4" from d. set back not more than 1/2" from
a. flush with 314.20
Legally required emergency lighting systems shall be designed and installed so that the failure of any _________________ cannot leave in total darkness any space that requires emergency illumination? A. illumination source b. raceway c. student d. none of the above,.
a. illumination source 700.16b
Conductors operating at 600-volts are run overhead for a distance of 60 feet. no messenger wire is provided. what is the minimum size copper conductor permitted? a. #6 awg b. #8 awg c. #4 awg d. #10 awg
b. #8 awg 225.6(A)(1)
Listed flexible metal conduit or listed liquidtight flexible metal conduit that encloses the secondary circuit conductor from a transformer or power supply for use with neon tubing shall be permitted as a bonding means if the total accumulative length of the conduit in the secondary circuit does not exceed ______________________ft. a. 50 ft' b. 100 ft c. 150 ft d. 200 ft
b. 100 feet 600.7 B 4
In a dwelling unit kitchen a receptacle outlet is required to be installed at all countertop spaces ___________________ or more in width? a. 6 in b. 12 in c. 18 in d. 24 in
b. 12 in 210.52 (c)
A three phase motor control center feeder is supplied with 6 - 500 kcmil thw copper conductors, two conductors per phase all in one raceway. what is the max allowable current rating per phase? a. 380 amps b. 608 amps c. 760 amps d. 800 amps
b. 608 amps 310.10G page 156 310.16 75 degree thw for 500 kcmil is 380 >3 conductor (310.15 c1) 80% derate 380x.8 = 304 amps/wire 2 conductors per phase 304x2 =608
What other loads are permitted on the same circuit as a gas-fired furnance? a. a receptacle outlet located within 10 feet b. only equipment associated with this furnance c. a lighting outlet d. no other loads
b. Only equipment associated with this furnace
what electrical units are used to express the actual maximum load for lighting units that employ ballasts, transformers, or autotransformers? a. volts b. amperes c. watts-hours d. volt - amps
b. amperes 220.18 B
current will ____________ if the voltage increase in a circuit with a fixed resistance? a. decrease b. increase c. remain the same d. lag the voltage
b. increase e/R|I
is it permissible to identify grounded conductors size #6 A.W.G with marking tape at the time of installation? A. Yes B. No C. Yes if the tape encircles the conductor d. yes if the inspector permits this to be done
b. no 200.6 (a) and (b)
Which of the following is the maximum size conductor that is permitted to be connected to a wire binding screw? a. 14 awg b. 12 awg c. 10 awg d. 8 awg
c. 10 awg 110.14 A
A single family dwelling has a net computed service load of 8-kwk and has 6 branch circuits. Which of the following is the minimum permitted ampacity of the service entrance conductors? a. 30 amperes b. 60 amperes c. 100 amperes d. 200 amperes
c. 100 amperes 230.79(c)
the disconnecting means for motor circuits rated 600v nominal, or less, shall have an ampere rating of _______________ percent of the full load current rating of the motor. a. 100% b. 125% c 115% d. 150%
c. 115% 430.110A
A branch circuit supplying a storage type water heater that has a capacity of 120 gallons or less shall have a rating of not less than __________% of the nameplate rating of the water heater? a. 80 b. 150 c. 125 d. 100
c. 125 422.13
What is the ampacity of a #14 A.W.G Fixture Wire? a. 15 amperes b. 10 amperes c. 17 amperes d. 8 amperes
c. 17 amperes Table 402.5
When a ground ring is used as part of a grounding electrode system which of the following is a requirement? a. 6ft of 2 awg b. 10ft of 2 awg c. 20 ft of 2 awg d. none of the above
c. 20 feet of 2 awg 250.52 (A)(4)
three #12 thhn copper conductors are installed in a raceway. what is the maximum amount of current permitted to flow in each conductor? a. 30-amperes b. 25 - amperes c. 20 - amperes d. 15 - amperes
c. 20-amperes 310.16 thhn 90 deg colum 30 amps *section 240.4 (D)
An overhead crane operates in an atmosphere that contains ignitable fibers. this area is considered to be a ______________________ location? a. Class I b. Class II c. Class III d. Unclassified
c. Class III 610.3. A 3, 500.5D 503.1
what effect does a large induction motor load have on the available short - circuit or ground - fault current during a fault condition? a. a motor load has not effect on the available fault current b. a motor load will decrease the available fault current c. a motor load will increase the available fault current d. a motor load will cause the available fault current to reduce to zero.
c. a motor load will increase the available fault current 110.9
what is the ampacity of three 1/0 THW conductors installed in rigid conduit to supply a pump MOTOR? a. 170 ampere b. 150 ampere c. 125 ampere d. 120 ampere
d. 120 ampere 430.22 -> 125% table 310.16 -> 150 amps what is the most motor current 150/ 1.25 = 120 amps
Service drop conductors not over 600 volts, passing over public streets, alleys, roads etc. subject to truck traffic, shall have a minimum clearance of ______________________. a. 10' b. 12' c. 15' d. 18'
d. 18' 230.24 B 4
What is the maximum distance permitted between supports when installing type NM cable above a hung ceiling? a. 2 ft b. 2 1/2 ft c. 4 ft d. 4 1/2 ft
d. 4 1/2 ft 334.30
A circuit is run exposed using 12-3 MC cable. What is the maximum permitted distance between supports? a. 2 ft b. 4 ft c. 4 1/2 ft d. 6 feet
d. 6 feet 330.30 (c)
A flammable liquid is a liquid that ___________________________? a. has a flash point below 38 o (100 o F) b. Liquid whose temperature is above its flash point. c. Liquid that has a vapor pressure not exceeding 276kPa (40 psia) at 38 o C or (100 o F) d. all of the above
d. all of the above art 100 definitions volatile flammable liquid
when wiring a central A/C system are the low-voltage control conductors permitted to be installed in the same raceway as the power conductors? a. only if they are both run to the same unit b. yes, as long as the insulation on all conductors has a voltage rating at least equal to the maximum voltage applied to any conductor within the raceway c. both a and b d. none of the above
d. none of the above 300.3(C)(1) in 725.136
at a ski lodge a hot tub is installed outside for use of the guests, which of the following is a requirement for installation is not required for single family dwelling? a. supplied by an individual branch circuits b. installed in a metallic raceway c. protected by a ground-fault circuit interupter. d. emergency shutoff
emergency shutoff 680.41
which of the following types of installation used by the electric utility are exempt from the requirements of the NEC? a. office buildings b. warehouse c. generation control centers d. garages
generation control centers 90->introductions 90.2A - covers 90.2B - no covers
A Single Receptacle installed in a 20-ampere rated individual branch circuit shall be rated ____________________? a. 20 amperes b. 15 amperes c. Both A and B d. None of the above
a. 20 Amperes 210.21 (B)(1)
a 240-volt single - phase circuit has a resistive load of 8500 watts connected to it. the net computed current to supply this load is ______________________ amperes? a. 35 b. 39 c. 44 d. 71
a. 35 calculation 240/8500
Ten #500 KCMIL THHN copper conductors are installed in a raceway. the raceway is installed in an area with an ambient temp of 124 degrees Fahrenheit. what is the maximum amount of current permitted to flow in each conductor? a. 380 amperes b. 15 amperes c. 163 amperes
c. 163 amperes either derate for temp first or the number of conductors in a raceway table 310.16 (90 degree thhn) is 430 amps note 2 says go to table 310.15 c 1 - derate 50% 215 ams. table 310.15 b 1 for temp derating 124 degrees in the 90 degree column is .76 215 x .76 = 163
A sub-panel is to be installed in the guest room of a motel. which of the following is a true statement? a. Not allowed in this location b. not allowed in the sleeping area c. not allowed in the bathroom d. None of the above
C. Not allowed in the bathroom 240.24(E)
Conductors supplying several motors, or a motor(s) and other load(s), shall have an ampacity not less than? a. 125 percent of the full-load current rating of the highest rated motor plus the sum of the full-load current ratings of all the other motors b. 125 percent of all motors on the circuit c. 115 percent of the full-load current rating of the highest rated motor plus the sum of the full-load current rating of all the other motors. d. 115 percent of all motor on the circuit
a. 125 percent of the full-load current rating of he highest rated motor plus the sum of the full-load current ratings of all the other motors 430.24 pg 314
What is the definition of approved? a. acceptable to the Authority Having Jurisdiction AHJ? b. acceptable to the owner c. acceptable for the application by a Nationally Recognized Test Laboratory D. all of the above
a. Acceptable to the Authority Having Jurisdiction Art 100 pg 3
When running conduit for an underground service, which of the following of raceways shall be sealed? a. raceways where the water table is high b. raceways containing fewer than 3 conductors c. a spare or unused raceway d. raceway in which the voltage exceeds 600 volts
c. a spare or unused raceway 230.8 300.5G
If the water supply to a building is installed in non-metallic pipe, the metallic interior water pipe shall be bonded. the bonding conductor shall be sized according to _______________ a. article 250.122 b. article 250.66 c. article 250.102 d. article 250.94
c. article 250.102 according to "size" 250.104 -> 250.102
A building has multiple 480-208/120 volt transformers. they are all connected to a common grounding electrode conductor. the minimum size of the common grounding electrode conductor is __________________? a. 4 awg b. 1/0 awg c. 2/0 awg d. 3/0 awg
d. 3/0 awg 250.30 (A)(6)(a)(1)
from question #55 (Ten #500 KCMIL THHN copper conductors are installed in a raceway. the raceway is installed in an area with an ambient temp of 124 degrees Fahrenheit. what is the maximum amount of current permitted to flow in each conductor?) what size inverse - time circuit breaker is permitted to protect the conductors?
answer D 175 amps 163 amps but using 240.4b says we can round up. next possible breaker amount is 175
a rigid non-metalic raceway contains two 20-ampere rated branch circuits, one 30- ampere rated branch circuit, and one 60 - ampere rated rated branch circuit. what is the minimum size equipment grounding conductor permitted if a single conductor is run? a. #12 awg b. #10 awg c. #6 awg d. #4 awg
b. #10awg 250.122(C) table 250.122
A 3-phase, 4-wire service has one ungrounded 500kcmil copper conductor per phase. There are no line to neutral loads. which of the following is the minimum size grounded conductor permited? a. 4 awg b. 1/0 awg c. 2/0 awg d. 3/0 awg
b. 1/0 awg table 250.102 (c)(1)
Where metallic plugs or plates are used with nonmetallic enclosures, they shall be recessed at least ________________ from the outer surface of the enclosure. a. 1/8 inch b. 1/4 inch c. 3/8 inch d. 1/2 inch
b. 1/4 inch 110.12A
Ten #12 THHN copper conductors are installed in a raceway. what is the maximum amount of current permitted to flow in each conductor? a. 30 amperes b. 15 amperes c. 20 amperes d. 25 amperes
b. 15 amperes. 310.16 #12 thhn rated 30 amps table 310.15 (c)(1) derated by 50%
when computing the load of track lighting in an art gallery the volt ampere per foot of track lighting is? a. 150 volt ampere per foot b. 150 volt ampere per 2 feet c. 250 volt ampere per foot d. 250 volt ampere per 2 feet
b. 150 volt ampere per 2 feet 220.43B
what is the maximum voltage of the secondary circuit of supplying power to an electric sign? a. 20000 volts b. 15000 volts c. 7500 volts d. 5000 volts
b. 15000 volts 600.23c xformer, powersupply, ballast
A bridal shop show window is 22 feet long. how many receptacles are required for display lighting? a. 1 b. 2 c. 3 d. 4
b. 2 210.62 22 ft - 12 ft = 10 ft 2 outlets
Where it is impracticable to locate the service head above the point of attachment, the service head location shall be permitted to be no further than how many feet from the point of attachment? a. 1 ft b. 2 ft c. 4 ft d. 5 ft
b. 2 ft. 230.54 C
direct buried cables operating at 1.5 KV shall have a minimum cover of ___________________inches? A. 24 b. 30 c. 36 d. 48
b. 30 inches 300.50 over 1000 v top row
Three #500 KCMIL THHN copper conductors are installed in a raceway. What is the maximum amount of current permitted to flow in each conductor? a. 400 amperes b. 380 amperes c. 500 amperes d.430 amperes
b. 380 amperes 110.14c1b not to exceed 75
from question 52 (Three #500 KCMIL THHN copper conductors are installed in a raceway. What is the maximum amount of current permitted to flow in each conductor?) what size inverse-time circuit breaker is permitted to protect the conductors? A. 450 ampere b. 400 ampere c. 300 ampere d. 430 ampere
b. 400 ampere 240.4 B
what is the full load current for a 3/4 HP single phase A.C. motor rated at 200 volts? a. 6.9 amps b. 7.9 amps c. 9.2 amps d. 13.8 amps
b. 7.9 amps 430.6A1 table 430.248 FLC -> table value FLA -> nameplate
A service or feeder supply household electric ranges, wall-mounted ovens, counter-mounted cooking units and electric dryer shall be permitted to have an additional demand factor of __________________ percent applied to the grounded conductor? a. 5 b. 70 c. 80 d. 100
b. 70 220.61B
Is a lighting outlet required to be installed at the exterior of a dwelling unit overhead garage door? A. yes b. no c. if required by a.h.j d. none of the above
b. no (not considered entrance or exit) 210.70 (a)(2)(2)
A CATV coaxial cable from the serving utility enters a building through the basement foundation wall. This is defined as the __________________ ? a. Service Point b. Point of Entrance c. cable supply point d. None of the Above
b. point of entrance 800.2
how many inches above floor level shall wiring used to supply external power to aircraft within an aircraft hangar be installed? a. 6 inches b. 12 inches c. 18 inches d. 24 inches
c. 18 inches 513.10(c)(1)
what is the minimum number of 15 ampere general lighting circuits required for a single family dwelling with a 2000 sqft floor area a. 2 b. 3 c. 4 d. 5
c. 4 220.14(j) 2000sq ft x 3va = 6000 va 6000 / 120 = 50 amps 50 amps / 15 = 3.3 round up 4
The Total rating of an appliance fastened in place and connected to a 15 or 20 ampere 120 volt branch circuit that also supplies lighting outlets cannot exceed _________ of the branch circuit rating? a. 10% b. 80% c. 50% d. 125%
c. 50% 210.23 (A)(2)
For what kind of lighting loads does the code say that there shall be no reduction in the size of the neutral as compared with the phase conductors? a. dwelling unit. b. hospital c. electric discharge d. hotel/motel
c. electric discharge 220.61.c
a heat/a/c air handling unit is installed in the attic of a dwelling unit. which of the following is required by NEC? a. receptacle outlet within 25 feet of the unit b. receptacle outlet on the same level and within 25 feet c. receptacle outlet on the same level, gfci protected, and within 25 feet d. none of the above
c. receptacle outlet on the same level and within 25 feet and GFCI proteccted 210.63 210.8 (E)
What section of metal enclosed and gear metal clad switch gear installed as high voltage service equipment shall include a ground bus for connection of service cable shields and facilitate the attachment safety grounds for personnel protection? A. section with the transformer b. section with the main disconnect c. section the service conductors terminate. d. all of the above
c. section the service conductors terminate 490.47
The factory installed attachment plug of cord and plug connected electric pipeline or vessel heating equipment used on voltages of 150 or less to ground shall be permitted to be the disconnecting means of circuits of: a. 50 amps or less b. 40 amps or less c. 30 amps or less d. 20 amps or less
d. 20 amps or less 427.55B
the minimum thickness of the sealing compound in class 1, div. 1 & 2 shall not be less then trade size of the conduit and in no case less than: a. 3/16in b. 1/2 in c. 3/4 in d. 5/8 in
d. 5/8 inch 501.15
In Non-dwelling occupancies, fixed infrared heating equipment shall be permitted to be supplied from branch circuits rated not over ____________________ amperes. a. 20 b. 30 c. 40 d. 50
d. 50 424 A (last sentence)
the branch circuit load for one 8-kw electric range is ____________________? a. 8-kw b. 10- KW c. 8.75-kw d. 6.4 -kw
d. 6.4 kw table 220.55 and column note 3 art 220.55 80%
What is allowed to be installed in the 20 amp small appliance branch circuits required in dwelling units? a. range hood b. under cabinet lights c. kitchen light d. supply to and support of electric clocks
d. supply to and support of electric clocks 210.52 B 2 exception 1
a multi-wire branch circuit supplying a gasoline dispensing pump shall be provided with a switch that will disconnect _________________________? a. one ungrounded conductor b. all ungrounded conductor c. the grounded conductor only d. the grounded conductor and all ungrounded conductors
d. the grounded and all ungrounded conductors 514.11 (a)
Service cable is installed from a meter pan up to the service point. they are subject to physical damage. which of the following is a true statement concerning installation? a. service cable is not allowed b. this location does not require any additional protection c. they may be protected from damage by sch 40 - p.v.c d. they may not be protected from damage by sch 80 - p.v.c
d. they may be protected from damage by sch 80 - p.v.c 230.50(B)(1)
