26 Questions
Which of the following is the correct equation for determining the required gutter width, G1, based on conductors M?
G1 = 6 inches
What is the required gutter width, G2, based on conductors BC2?
G2 = 1½ inches
What is the required gutter width, G4, based on conductor N?
G4 = 4 inches
According to the text, what is the required gutter width for T2 based on conductors BC2?
3 inches
What is the required gutter width for T3 based on conductors BC3?
4 inches
According to Table 312.6(B), Note 2, which type of removable terminal wire connectors are permitted to have a reduction in bending space?
Both compression type and set-screw type
What is the maximum percentage of the cross-sectional area of the wiring space that can be occupied by all conductors, splices, taps, and equipment according to 312.8(B)(2)?
75%
According to the text, what is the minimum insulation temperature rating required for conductors used exclusively for control or instrumentation circuits?
90°C
According to the text, what is the maximum distance at which the conductors used for control or instrumentation circuits should be secured?
250 mm (10 in.)
According to the text, what is the minimum thickness of metal enclosures constructed of sheet steel?
1.35 mm (0.053 in.) uncoated
According to the text, what is the minimum airspace required between the base of a device and the wall of any metal cabinet or cutout box?
1.59 mm (0.0625 in.)
According to the given text, what is the volume of the masonry box/gang with dimensions of 95 × 50 × 65 (33⁄4 × 2 × 21⁄2)?
3575 cubic units
Based on the provided information, what is the depth of the FS * single cover/gang with a volume of 295 cubic units and a length of 18.0?
14.5 units
According to the given text, what is the total volume of all the boxes with dimensions 100 × 54 × 38 (4 × 21⁄8 × 11⁄2), 100 × 54 × 48 (4 × 21⁄8 × 17⁄8), and 100 × 54 × 54 (4 × 21⁄8 × 21⁄8)?
296,400 cubic units
According to Table 312.6(B)(2), what is the minimum wire-bending space for 2/0 AWG conductors at terminals with 4 or more wires?
114 mm
According to the text, what is the maximum number of conductors that can be arranged in a 100 x 32 mm (4 x 1¼ in.) metal box?
7
When does Exception No. 1 apply for conductors entering or leaving an enclosure through the wall opposite its terminal?
When the conductor enters or leaves the enclosure where the gutter joins an adjacent gutter
According to the text, what is the minimum volume for conduit bodies?
205 cm3 (12.5 in.3)
What is the maximum offset allowed for a conductor not larger than 350 kcmil entering or leaving an enclosure containing only a meter socket(s)?
50 percent of the bending space specified in Table 312.6(A)
According to the text, what is the volume of a 75 x 50 x 38 mm (3 x 2 x 1½ in.) device box?
123 cm3 (7.5 in.3)
What is the minimum wire-bending space at terminals for 4/0 AWG conductors with 3 wires?
178 mm
According to the text, what is the maximum number of conductors that can be arranged in a 120 x 54 mm (4⅝ x 2⅛ in.) square box?
20
According to the text, what is the purpose of back-wiring spaces or side-wiring spaces in cabinets and cutout boxes?
To provide additional space for conductors
According to the text, when are side-wiring spaces, side gutters, or side-wiring compartments of cabinets and cutout boxes not required to be made tight enclosures?
When they contain only conductors that enter the cabinet directly opposite to the devices where they terminate
According to the text, what type of boxes are not classified as conduit bodies?
Cast metal, sheet metal, nonmetallic, and other boxes such as FS, FD, and larger boxes
According to the text, what is the maximum length allowed for screws or other fasteners penetrating the wall of a box exceeding 1650 cm3 (100 in.3)?
6 mm (1⁄4 in.)
Test your knowledge on electrical safety and code requirements for wet locations. Learn about the proper installation of boxes, conduit bodies, outlet box hoods, and fittings to prevent moisture accumulation. Find out why it is important to use products specifically listed for use in wet locations.
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