19. What is the maximum allowable ampacity for No. 6 aluminum conductors type THHN, 194 F rated insulation, installed in an ambient temperature of 30 C. There are 3 current carrying conductors in the cable.
A. 50
B. 75
C. 60
D. 55
20. An uninsulated equipment grounding conductor shall be permitted, but, if individually covered, the covering shall have a continuous outer finish that is ___________________________________. Exceptions ignored.
A. green
B. green with yellow strips
C. yellow with green strips
D. A or B
21. Unless required elsewhere in this Code, equipment grounding conductors shall be permitted to be bare, covered, or __________________________. Exceptions ignored.
A. painted green
B. energized
C. insulated
D. fused
22. A switch intended for use in general distribution and branch circuits. It is rated in amperes, and it is capable of interrupting its rated current at its rated voltage.
A. Isolation Switch
B. General-Use Switch
C. Toggle Switch
D. Breaker Switch
23. ________ connectors shall not be concealed.
A. rigid
B. XLT
C. angle
D. 45 degree offset
24. The length of the cord for a kitchen waste disposer shall not be less than _____ in. and not more than _____ in.
A. 24, 42
B. 30, 48
C. 36, 72
D. 18, 36
25. In Dwelling units, permanently installed electric baseboard heaters equipped with factory-installed receptacle outlets or outlets provided as a separate assembly by the manufacturer shall be permitted as the required outlet or outlets for the wall space utilized by such permanently installed heaters. Such receptacle outlets shall __________________________________.
A. be rated the same as the heater circuits
B. be connected to and controlled by the heater circuits
C. not be connected to the heater circuits
D. be install above the heating elements
26. The grounding electrode conductor shall be ___________________________. or the items as permitted in 250.68(C).
A. copper, aluminum, or copper-clad aluminum
B. solid or stranded, and insulated
C. stranded, insulated, covered, or bare
D. solid or stranded, and bare
27. For pools, spas, fountains, and similar locations, lighting systems shall be installed not less than ________________ horizontally from the nearest edge of the water, unless permitted by Article 680.
A. 9 m (30 ft)
B. 6 m (20 ft)
C. 12 m (40 ft)
D. 3 m (10 ft)
28. Fuses and circuit breakers shall be permitted to be connected in parallel where they are __________________________________ and listed as a unit. Individual fuses, circuit breakers, or combinations thereof shall not otherwise be connected in parallel.
A. rated equally for amperage and time delay
B. matched pairs
C. factory assembled in parallel
D. of the same type and rating
29. What is the maximum number of conductors or fixture wires that can be used in electrical metallic tubing for No. 14 Type THHW conductors in trade size 27 tubing?
A. 6
B. 10
C. 16
D. 28
30. No parts of cord-connected luminaries (fixtures), chain-, cable-, or cord-suspended-luminaries (fixtures), lighting track, pendants, or ceiling-suspended (paddle) fans shall be located within a zone measured _______ ft horizontally and _______ ft vertically from the top of the bathtub rim or shower stall threshold.
A. 3, 8
B. 5, 8
C. 5, 10
D. 8, 8
31. What is the maximum percent of FMC conduit total interior area that can be filled if more that 2 conductors are used in the tube.
A. 53
B. 31
C. 40
D. 60
32. Service cables, where subject to physical damage, shall be protected by any of the following except.
A. Rigid metal conduit
B. Schedule 80 rigid PVC conduit
C. Electrical metallic tubing
D. Intermediate metal conduit
E. all are acceptable
33. What is the maximum ampere rating of a insulated single copper conductor in air with a conductor temperature of 90 C. in an ambient temperature of 40 C , the conductor size is No. 4 and the voltage is 2500 Volts.
A. 100
B. 110
C. 115
D. 145
34. With respect to Solar Photovoltaic (PV) Systems equipment, required ground fault protection devices or systems shall:
A. Be capable of detecting a ground fault in the PV array dc current-carrying conductors and components, in- cluding any intentionally grounded conductors,
B. Interrupt the flow of fault current
C. Provide an indication of the fault
D. Be listed for providing PV ground-fault protection
E. All of the above
35. An insulated grounded conductor of 6 AWG or smaller shall be identified by _________________.
A. A continuous white outer finish.
B. A continuous gray outer finish.
C. Three continuous white or gray stripes along the conductor’s entire length on other than green insulation.
D. Wires that have their outer covering finished to show a white or gray color but have colored tracer threads in the braid identifying the source of manufacture shall be considered as meeting the provisions of this section.
E. Any of the above and more options are available
36. Where space limitations prevent wiring from being routed a distance 5 ft or more from a pool, such wiring shall be permitted where installed in complete raceway systems of ______________________________.
A. rigid metal conduit
B. intermediate metal conduit
C. or a nonmetallic raceway system
D. none of the above
E. all of the above
37. A raceway of circular cross section made of helically wound, formed, interlocked metal strip.
A. Electrical Metallic Tubing (EMT)
B. Rigid Metal Conduit (RMC)
C. Flexible Metal Conduit (FMC)
D. Rigid Non-metallic Conduit (RNC)
38. The electric vehicle supply equipment shall be located for direct electrical coupling of the EV con- nector (conductive or inductive) to the electric vehicle. Unless specifically listed and marked for the location, the coupling means of the electric vehicle supply equipment shall be stored or located at a height of not less than ____________ above the floor level for indoor locations and ____________ above the grade level for outdoor locations.
A. 24 in, 36 in
B. 18 in, 24 in
C. 36 in, 48 in
D. any height is acceptable
39. What is the maximum fill allowance for a 4 inch square box 2.125" deep, for No. 12 copper conductors.
A. 10
B. 12
C. 13
D. 15
40. An assembly of two or more single-pole fuses.
A. Main Disconnect
B. Multiple Fuse
C. Gang Disconnect
D. Parallel Breaker
41. Wiring located within the cavity of a fire-rated floor-ceiling or roof-ceiling assembly shall not be secured to, or supported by ___________________________________. Exceptions ignored.
A. metal cross members
B. the ceiling assembly, including the ceiling support wires
C. joists, beams, or columns
D. cantilevered floor joists
42. As pertaining to class 1, class 2, and class 3 remote-control, signaling, and power-limited circuits, separation of ground-fault protection time-current characteristics shall conform to the manufacturer’s recommendations and shall consider all required tolerances and disconnect operating time to achieve _____________ selectivity.
A. 50 percent
B. 75 percent
C. 100 percent
D. none of these
43. Operation of equipment in excess of normal, full-load rating or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating. A fault, such as a short circuit or ground fault, is not an overload.
A. Ground Fault
B. Arc Fault
C. Overload
D. Short Circuit
44. In hospitals the lighting demand factor of the ________________ VA is 20 Percent.
A. First 3000
B. Remainder over 50,000
C. VA Load from 3001 to 120,000
D. all lighting
45. A 6 AWG grounding electrode conductor that is free from exposure to physical damage shall be permitted to be run along the surface of the building construction without metal covering or protection where it is ___________________________.
A. a stranded bare copper conductor
B. a solid, insulated copper conductor
C. a stranded, insulated copper conductor
D. securely fastened to the construction
46. In a multiwire branch circuit all conductors shall originate from the same ________________ or similar distribution equipment.
A. location
B. panelboard
C. junction box
D. meter
47. A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.
A. Bonding Jumper
B. Connection
C. Soldering
D. Welding
48. Electrodes of bare or conductively coated iron or steel plates must be at least ____ in. thick and at least ____ sq. feet in contact with exposed earth to be used as a grounding electrode.
A. 0.06, 3
B. 0.06, 2
C. .25, 2
D. 0.06, 4
49. The dwelling has a floor area of 1500 sq. ft. exclusive of an unfinished cellar not adaptable for future use, unfinished attic, and open porches. It has two 20-A small appliance circuits, one 20-A laundry circuit, two 4-kW wall-mounted ovens, one 5.1-kW counter-mounted cooking unit, a 4.5-kW water heater, a 1.2-kW dishwasher, a 5-kW combination clothes washer and dryer, six 7-A, 230-V room air-conditioning units, and a 1.5-kW, 230 V permanently installed bathroom space heater. Assume wall-mounted ovens, counter-mounted cooking unit, water heater, dishwasher, and combination clothes washer and dryer kW ratings equivalent to kVA. What is the total calculated load for the service in VA and the total required minimum service rating, assuming that the two 4-kVA wall-mounted ovens are supplied by one branch circuit, the 5.1-kVA counter-mounted cooking unit by a separate circuit.
A. Calculated Service load 29,200 VA - Minimum Service Rating 122A
B. Calculated Service load 15,200 VA - Minimum Service Rating 100A
C. Calculated Service load 39,200 VA - Minimum Service Rating 150A
D. Calculated Service load 5,200 VA - Minimum Service Rating 60A