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Real good info > Week3 Code Quiz > Flashcards

Week3 Code Quiz Flashcards

1
Q
  1. T. F. Ambient temperature correction factors are applied when above above 30 degree C.
A

True

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2
Q
  1. T. F. The maximum allowable ampacity of a run of #4 NS90 aluminum triplex is 120 amps.
A

Table 36A. 4-004 (4)

Answer: False 125 Amps

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3
Q
  1. T. F. Service conduit embedded in not less than 50mm (2”) of concrete shall not be considered inside the building. As per Section 6.
A

6-208 (raceways or cables containing consumer’s service conductors shall be located outside building unless they are
(A) embedded in and encircled by not less than 50 mm of concrete or masonry where permitted by Section 12
(B) directly buried in accordance with Rule 6-300 and located beneath a concrete slab not less than 50 mm thick

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4
Q
  1. T. F. A three-way switch is not considered a disconnecting means
A

Rule 2-304 Disconnection
(2) Three-way or four-way switches shall not be considered a disconnection means.
Answer : True

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5
Q
  1. T. F. A 16 kW range in a residential occupancy shall be supplied by a minimum of #6 copper conductors. (75 Degree temperature rating)
A

Rule 8-300 Branch Circuits supplying electric ranges.
(1) (b) 8 kw plus 40 % of the amount by which the rating of the range exceeds 12 kw . So 9600 Watts / 240 volts
=40 Amps now Table 2 ampacities 50 Amps is good for a No.8 awg
Answer : False

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6
Q
  1. T. F. Consumer’s service includes the wiring from the service box to the utility’s transformer.
A

Service, Consumer’s definitions -
All that portion on the consumer’s installation from the service box or it’s equivalent up to and including the point at which the supply authority makes connection.
Answer : True

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7
Q
  1. T. F. The marking of electrical equipment is required to include the date of manufacture.
A

Rule 2-100 Marking of equipment

Answer : False

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8
Q
  1. T F. number 14 AWG is the smallest conductor size for a lighting branch circuit.
A

8.

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9
Q
  1. T. F. The current carrying capacity of 6 #6 RW90 XPLE copper conductors, installed in the same reaceway,feeding 2 - 3phase circuits is 75 amps.
A

Table 2 No. 6 can carry up to 65 Amps from the 75 C now derate with table 5C 0.80 x 65 = 52 Amps .
Answer : False

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10
Q
  1. T. F. The bond screw in an outlet box may be used for bonding connection and box support.
A

Rule 10-904 Bonding conductor connection to circuits and equipment . (3) The bonding connection shall be secured to every metal box by means of a bonding screw that shall be used for no other purpose.
Answer : False

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11
Q
  1. T. F. Table 16 is used for determining the grounding conductor size for residential services.
A

11.

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12
Q
  1. T. F. Generally, system ground may be spliced.
A

Rule 10-806 Installation of system grounding conductors (1.) The grounding conductor for a system ground shall be without joint or splice throughout its length, except in the case of busbars, thermit-welded joints, compression connectors applied with a compression tool compatible with the particular connector, or whereas it is necessary to control the effects of stray earth current, devices specifically approved for Connection in series with the grounding conductor.
Answer: True

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13
Q
  1. T. F. Bonding conductor connections which depend on solder shall not be used.
A

Rule 10-904 Bonding conductor connection to circuits and equipment (2) Connections that depend upon solder shall not be used.
Answer: True

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14
Q
  1. T. F. A #12 aluminum is the smallest size aluminum conductor that can be used for a branch circuit.
A

?

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15
Q
  1. T. F. Tech cable may be buried to a minimum depth of 450 mm without mechanical protection in area subject to vehicular traffic.
A

False table 53 600 mm

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16
Q
  1. T. F. #27 Rigid PVC must be supported each:
A
  1. A. 500mm B. 750mm C. 1 meter. D. 2 meters

B: 750mm

17
Q
  1. A conduit contains 6 - 250 kcmil RW75 XPLE copper conductors used as paralleled feeders to a single phase 120/240 volt load. These conductors each have an ampacity of:
A
  1. A. 265 amps. B. 185.5 amps. C. 204 amps. D. 232 amps.

C. 204 amps

18
Q
  1. You have installed six #10 AWG RW90 copper conductors in a raceway to feed two 3-phase motors, the current carrying capacity of these conductors is (Equipment is rated for 75 degrees C.)
A
  1. A. 24 amps. B. 32 amps. C. 28 amps. D. 40 amps
19
Q
  1. The minimum system ground conductor which surface run without mechanical protection is:
A
  1. A. #8. Copper. B. #6 copper. C. #4 aluminum. D. #4 cooper

B. #6 copper

20
Q
  1. A conduit with three #2 R90 aluminum conductors is run through an area of the mill where ambient temperature will reach 40 degree C. What is the maximum current that each conductor can handle?
A
  1. Answer : ________________. Rule#: _______________
21
Q
  1. Can an electrical inspector reject a job because he thought that the installation was poorly arranged?
A
  1. Yes________. Rule#: _______________2-108
22
Q
  1. Three single conductor #2 R99 copper cables feeding a 120/240 volt single phase load with a 75 degree C. Temperature rating, are run exposed and in a contact with each other on an exterior wall have an ampacity of:
A
  1. Answer : ________________. Rule#: _______________
23
Q
  1. You are going to tuna #6 NS75 aluminum triplex from a residence to a sub feed in a garage. What is the maximum ampacity of the cable?
A
  1. Answer : ________________. Rule#: _______________
24
Q
  1. Can a bare aluminum service neutral conductor be installed in rigid steel conduit?
A
  1. Answer : ________________. Rule#: _______________
25
Q
  1. Can a meter base be installed in the stairway for an outside basement entrance?
A
  1. Answer : ________________. Rule#: _______________
26
Q
  1. Do rules of section 6 apply to services where voltage will exceed 750 volts?
A
  1. Answer : ________________. Rule#: _______________
27
Q
  1. You are installing a service that required 100 amps minimum ampacity for the service conductors. Service is 120/240 volt single phase and the copper conductors will be RW75 XPLE, without jacket and with 1000 volts insulation. What is the minimum AWG size of the conductors and the metric designator of of the EMT conduit?
A
  1. Answer : ________________. Rule#: _______________
28
Q
  1. A neutral conductor, with only unbalanced current, is not counted in determining the ampacity of the two hot line wires in conduit.
A
  1. T. F. Rule:_______________
29
Q
  1. Service conduit shall have a minimum trade size 21.
A
  1. Answer : ________________. Rule#: _______________
30
Q
  1. Apparatus in an “enclosure 3R” is satisfactory for installations outdoors.
A
  1. Answer : ________________. Rule#: _______________
31
Q
  1. An Device box 3” x 2” x 3”, has a duplex receptacle and three insulated wire connectors to be installed in it. Under these conditions how may two-wire #14 NMSC can be run into it?
A
  1. A. One. B. Two. C. Three. D. Four

B. Two. Pg. 350

32
Q
  1. A #16 galvanized water pipe driven into the ground at least 3 meters below the permanent moisture level is acceptable as a ground rod (True or False)
A
  1. Answer : ________________. Rule#: _______________
33
Q
  1. Overload relay heaters may be connected ahead of the power contacts in a magnetic starter? (True or False)
A
  1. Answer : ________________. Rule#: _______________
34
Q
  1. Calculate the expansion of a #53 PVC conduit which is 30.48 meters long and subject to a temperature variation. Of -50 degree C. To +35 degree C.
A
  1. Answer : ________________. Rule#: _______________
35
Q
  1. Is the installation of KO (knockout) fillers mandatory by the code?
A
  1. Answer: yes_____________. Rule#: _______________12-3024
36
Q
  1. Must gaps around an outlet box in a plaster wall be filled in?
A
  1. Answer : ________________. Rule#: _______________

Yes - 12-3016 (2)

37
Q
  1. What is the minimum size of pipe to be used as a mast pipe?
A

63.

  1. Answer : ________________. Rule#: _______________

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