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Questions and Answers
Which of the following is true about the grounding of shield sections in an engineered cabling system?
What type of backfill should be avoided in an excavation to prevent damage to raceways and cables?
What should be used to seal the end of a raceway entering from an underground system within a building?
Which of the following is true about electrical equipment installed in air-handling spaces?
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What is the maximum peak optical density allowed for electrical equipment tested for low smoke and heat release properties?
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What type of power-limited remote-control and signaling circuits should comply with 725.3?
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What is the maximum continuous load allowed for conductors that are 14 AWG copper-clad aluminum?
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According to the text, what is the minimum bending radius for shielded or lead-covered conductors during or after installation?
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According to the text, what type of conductors should be used in raceways installed in wet locations above grade?
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According to the text, what should be applied to exposed runs of braid-covered insulated conductors if they do not have flame-retardant protection?
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According to the text, what should be connected to metallic shielding components of shielded cables?
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Which of the following spaces does this section apply to?
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Which code provides information on how the term 'other spaces used for environmental air (plenum)' correlates with the use of the term 'plenum' for return air purposes?
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Which of the following is NOT a permitted wiring method for other spaces used for environmental air?
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Which of the following is NOT a requirement for metallic cable tray systems in other spaces used for environmental air (plenums)?
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Which type of raceway is permitted for direct burial when solid rock prevents compliance with the specified cover depths?
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In industrial establishments, what is the minimum cover requirement for underground installations other than rigid metal conduit and intermediate metal conduit?
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What is the minimum depth at which underground direct-buried cables should be identified by a warning ribbon?
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What is the minimum depth at which a slab should extend beyond an underground installation?
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According to the text, what is the maximum overcurrent protection for 16 AWG copper conductors?
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According to the text, which types of conductors are permitted for use if they have other types and thicknesses of insulation?
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According to the text, in which article can you find information about wiring methods and materials for systems rated over 1000 volts ac, 1500 volts dc, nominal?
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According to the text, conductors of circuits rated over 1000 volts ac, 1500 volts dc, nominal, shall not occupy the same equipment wiring enclosure, cable, or raceway with conductors of circuits rated 1000 volts ac, 1500 volts dc, nominal, or less unless otherwise permitted. Which of the following is an exception to this rule?
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Which type of wiring method is permitted to be installed in ducts specifically fabricated to transport environmental air?
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What is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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Under what conditions are wiring methods or cabling systems listed for use in other spaces used for environmental air (plenums) permitted to be installed in ducts specifically fabricated for environmental air-handling purposes?
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Which article in the Code covers general requirements for conductors rated up to and including 2000 volts?
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What is the minimum size of conductors for voltage ratings up to and including 2000 volts?
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Which type of conductors are permitted for use if they have other types and thicknesses of insulation?
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According to the text, what is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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According to the text, what is the minimum bending radius for shielded or lead-covered conductors during or after installation?
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According to the text, what is the maximum peak optical density allowed for electrical equipment tested for low smoke and heat release properties?
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According to the text, what is the minimum depth at which underground direct-buried cables should be identified by a warning ribbon?
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According to the text, what is the minimum percentage of copper in the cross-sectional area of a stranded copper-clad aluminum conductor?
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Which of the following materials is NOT listed as suitable for use with aluminum conductors?
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According to the text, what is the maximum operating temperature for thermoplastic insulation rated 600 Volts?
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Which type of insulation is required for conductors that are not specifically permitted elsewhere in the code to be covered or bare?
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According to the text, what is the maximum continuous load allowed for conductors that are 14 AWG copper-clad aluminum?
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According to the text, what is the minimum bending radius for shielded or lead-covered conductors during or after installation?
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According to the text, what is the maximum peak optical density allowed for electrical equipment tested for low smoke and heat release properties?
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According to the text, what is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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Which type of cable is suitable for dry and damp locations, has a maximum temperature rating of 90°C, and is flame-retardant and heat-resistant?
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Which type of cable is suitable for wet locations, has a maximum temperature rating of 75°C, and is flame-retardant, moisture-resistant, and heat-resistant?
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Which type of cable is suitable for dry and wet locations, has a maximum temperature rating of 75°C, and is flame-retardant, moisture-resistant, and heat-resistant?
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Which type of cable is suitable for dry and wet locations, has a maximum temperature rating of 90°C, and is flame-retardant and moisture-resistant?
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According to the text, which types of conductors are permitted for use in wet locations?
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According to the text, which of the following is NOT a requirement for metallic cable tray systems in other spaces used for environmental air (plenums)?
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According to the text, what is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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According to the text, what is the maximum continuous load allowed for conductors that are 14 AWG copper-clad aluminum?
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According to the text, what is the percentage increase in ampacity when the cross-sectional area of a Type THW conductor increases from 1000 to 1500 kcmil?
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According to the text, what is the percentage increase in ampacity when the cross-sectional area of a Type THW conductor increases from 1000 to 2000 kcmil?
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According to the text, when is it beneficial to install two or more paralleled conductors per phase?
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Which section of the Code provides adjustment factors for conductors and ampacity for bare copper and aluminum bars in auxiliary gutters?
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According to the text, adjustment factors shall not apply to conductors in raceways with a length not exceeding how many millimeters (inches)?
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Which types of conductors are permitted for use in underground conductors entering or leaving an outdoor trench if those conductors have physical protection in the form of rigid metal conduit, intermediate metal conduit, rigid polyvinyl chloride conduit (PVC), or reinforced thermosetting resin conduit (RTRC)?
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According to the text, which of the following is NOT a requirement for paralleled conductors?
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According to the text, what is the purpose of locating different phase conductors close together?
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According to the text, what is the requirement for the physical characteristics of parallel raceways or cables for a circuit?
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According to the text, what is the requirement for equipment grounding conductors used in parallel?
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According to the text, what is the maximum temperature rating for conductors suitable for wet locations?
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According to the text, what is the maximum percentage of copper in the cross-sectional area of a stranded copper-clad aluminum conductor?
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According to the text, what is the minimum bending radius for shielded or lead-covered conductors during or after installation?
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According to the text, what is the maximum continuous load allowed for conductors that are 14 AWG copper-clad aluminum?
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Which of the following factors are considered when determining ampacities for conductors?
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How are ampacities for ambient temperatures other than those shown in the ampacity tables corrected?
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What is the minimum depth at which a slab should extend beyond an underground installation?
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Which types of conductors are permitted for use if they have other types and thicknesses of insulation?
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Which one of these is the most correct?
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According to the text, what is the minimum disconnect rating for a dwelling unit?
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According to the text, what is the maximum ampacity allowed for feeder conductors supplying the entire load associated with a one-family dwelling?
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According to the text, what is the maximum ampacity allowed for service conductors supplying the entire load associated with a one-family dwelling?
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According to the text, what is the maximum ampacity allowed for single-phase feeder conductors from a 208Y/120 volt system for one-family dwellings and individual dwelling units of two-family and multifamily dwellings?
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According to Table 310.15(C)(1), what is the adjustment factor for a raceway or cable with 7-9 current-carrying conductors?
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According to the text, when do adjustment factors not apply to Type AC cable or Type MC cable?
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According to the text, when should a 60 percent adjustment factor be applied to cables meeting certain requirements?
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According to the text, what is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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What is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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According to the text, what is the minimum depth at which a slab should extend beyond an underground installation?
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According to the text, what is the minimum airspace required between surface-type enclosures and the wall or supporting surface in damp or wet locations?
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According to the text, what is the maximum depth of a slab that should extend beyond an underground installation?
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According to the text, what is the maximum length allowed for flexible metal conduit used to connect physically adjustable equipment and devices in fabricated ducts?
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According to the text, what is the minimum disconnect rating for a dwelling unit?
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Which of the following factors are considered when determining ampacities for conductors?
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Which of the following is an example of a retardant and heat-resistant material?
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Which of the following is the correct definition of a conductor?
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Which article in the Code covers general requirements for conductors rated up to and including 2000 volts?
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Which of the following is not a type of electrical conductor?
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What is the purpose of a ground fault circuit interrupter (GFCI)?
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What is the maximum voltage rating for a standard household electrical outlet in the United States?
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Which of the following is true about the installation of cables in raceways?
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According to the text, what is the maximum number of conductors that can be deflected within a cabinet or cutout box?
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According to the text, which types of conductors are permitted for use in underground conductors entering or leaving an outdoor trench?
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According to the text, what is the minimum bending radius for shielded or lead-covered conductors during or after installation?
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