Podcast
Questions and Answers
Which type of enclosures are permitted for general-purpose use in Class I, Division 1 locations?
Which type of enclosures are permitted for general-purpose use in Class I, Division 1 locations?
What type of enclosures are required for lightning protective devices and fuses?
What type of enclosures are required for lightning protective devices and fuses?
In what type of locations are explosionproof enclosures required for audible signaling devices with make-and-break contacts?
In what type of locations are explosionproof enclosures required for audible signaling devices with make-and-break contacts?
Which type of panelboard is suitable for use in Class II, Division 2, Group F and G locations?
Which type of panelboard is suitable for use in Class II, Division 2, Group F and G locations?
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In Class II, Division 1 locations, which components shall be provided with enclosures identified for the location?
In Class II, Division 1 locations, which components shall be provided with enclosures identified for the location?
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Which division is mentioned in relation to control transformers and resistors?
Which division is mentioned in relation to control transformers and resistors?
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Which type of cable is required to include an equipment grounding conductor in addition to a drain wire?
Which type of cable is required to include an equipment grounding conductor in addition to a drain wire?
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What type of wiring method is permitted in Class II, Division 2 locations?
What type of wiring method is permitted in Class II, Division 2 locations?
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In restricted industrial establishments, which of the following wiring methods provides the required corrosion resistance for the installation environment?
In restricted industrial establishments, which of the following wiring methods provides the required corrosion resistance for the installation environment?
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What type of cable is suitable for use in Class II, Group E hazardous atmospheres?
What type of cable is suitable for use in Class II, Group E hazardous atmospheres?
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Which type of cable should be used in restricted industrial establishments for applications limited to 600 volts nominal or less, where the cable is not subject to physical damage and is terminated with fittings listed for the location?
Which type of cable should be used in restricted industrial establishments for applications limited to 600 volts nominal or less, where the cable is not subject to physical damage and is terminated with fittings listed for the location?
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What type of cable should be installed in ladder, ventilated trough, or ventilated channel cable trays, with a space not less than the larger cable diameter between the two adjacent cables, unless otherwise protected against dust buildup resulting in increased heat?
What type of cable should be installed in ladder, ventilated trough, or ventilated channel cable trays, with a space not less than the larger cable diameter between the two adjacent cables, unless otherwise protected against dust buildup resulting in increased heat?
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Which cable type should be used in restricted industrial establishments, listed with an overall jacket, that is terminated with fittings listed for the location and installed in accordance with 337.10?
Which cable type should be used in restricted industrial establishments, listed with an overall jacket, that is terminated with fittings listed for the location and installed in accordance with 337.10?
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What type of cable should be used for flexible connections in hazardous (classified) locations, where flexible cords shall comply with 502.140?
What type of cable should be used for flexible connections in hazardous (classified) locations, where flexible cords shall comply with 502.140?
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Which of the following conditions must be met in order for the bonding jumper to not be required in Class II, Division 2 locations?
Which of the following conditions must be met in order for the bonding jumper to not be required in Class II, Division 2 locations?
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Which of the following is a requirement for surge arresters and surge-protective devices installed in a Class II, Division 1 location?
Which of the following is a requirement for surge arresters and surge-protective devices installed in a Class II, Division 1 location?
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Where is the preferred location for service equipment, switchboards, and panelboards in an electrical installation for hazardous locations?
Where is the preferred location for service equipment, switchboards, and panelboards in an electrical installation for hazardous locations?
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What is the requirement for transformers and capacitors containing a liquid that will burn in Class II, Division 2 locations?
What is the requirement for transformers and capacitors containing a liquid that will burn in Class II, Division 2 locations?
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Which one of the following is NOT a suitable method for preventing dust from entering dust-ignitionproof enclosures through the raceway?
Which one of the following is NOT a suitable method for preventing dust from entering dust-ignitionproof enclosures through the raceway?
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Which one of the following is NOT a requirement for uninsulated exposed parts in Class II, Divisions 1 and 2 locations?
Which one of the following is NOT a requirement for uninsulated exposed parts in Class II, Divisions 1 and 2 locations?
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Which one of the following is NOT a requirement for grounding and bonding in hazardous locations?
Which one of the following is NOT a requirement for grounding and bonding in hazardous locations?
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Which one of the following is a requirement for liquidtight flexible metal conduit in hazardous locations?
Which one of the following is a requirement for liquidtight flexible metal conduit in hazardous locations?
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Which type of location is defined as 'hazardous because of the presence of combustible dust' in the text?
Which type of location is defined as 'hazardous because of the presence of combustible dust' in the text?
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What is the main difference between Class I equipment and Class II equipment mentioned in the text?
What is the main difference between Class I equipment and Class II equipment mentioned in the text?
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Which type of wiring method is permitted in Class II, Division 1 locations according to the text?
Which type of wiring method is permitted in Class II, Division 1 locations according to the text?
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Which standard provides methods to minimize the occurrence of fire or explosion in areas where combustible metals or metal dusts are produced, processed, finished, handled, stored, and used?
Which standard provides methods to minimize the occurrence of fire or explosion in areas where combustible metals or metal dusts are produced, processed, finished, handled, stored, and used?
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Which one of the following is a requirement for control transformers, solenoids, and impedance coils in Class II, Division 2 locations?
Which one of the following is a requirement for control transformers, solenoids, and impedance coils in Class II, Division 2 locations?
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Which one of the following is NOT a suitable type of enclosure for motors, generators, and other rotating electrical equipment in Class II, Division 2 locations?
Which one of the following is NOT a suitable type of enclosure for motors, generators, and other rotating electrical equipment in Class II, Division 2 locations?
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Which one of the following is a requirement for resistors and resistance devices in hazardous locations?
Which one of the following is a requirement for resistors and resistance devices in hazardous locations?
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Which type of enclosures are required for fixed lighting luminaires in hazardous locations?
Which type of enclosures are required for fixed lighting luminaires in hazardous locations?
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What type of enclosures are permitted for switches, circuit breakers, and fuses in hazardous locations?
What type of enclosures are permitted for switches, circuit breakers, and fuses in hazardous locations?
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Which of the following is a requirement for surge arresters and surge-protective devices installed in hazardous locations?
Which of the following is a requirement for surge arresters and surge-protective devices installed in hazardous locations?
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What type of cable should be used for flexible connections in hazardous locations, where flexible cords shall comply with 502.140?
What type of cable should be used for flexible connections in hazardous locations, where flexible cords shall comply with 502.140?
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Which of the following is a requirement for flexible cords used in hazardous locations?
Which of the following is a requirement for flexible cords used in hazardous locations?
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What type of receptacles are required in Class II, Division 1 locations?
What type of receptacles are required in Class II, Division 1 locations?
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Which of the following is a requirement for enclosures containing contacts in Class II, Division 2 locations?
Which of the following is a requirement for enclosures containing contacts in Class II, Division 2 locations?
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What type of enclosures are required for resistors and similar equipment in Class II, Division 1 locations?
What type of enclosures are required for resistors and similar equipment in Class II, Division 1 locations?
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Which type of cable is required to include an equipment grounding conductor in addition to a drain wire?
Which type of cable is required to include an equipment grounding conductor in addition to a drain wire?
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Which one of the following is a requirement for grounding and bonding in hazardous locations?
Which one of the following is a requirement for grounding and bonding in hazardous locations?
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Which type of cable should be used in restricted industrial establishments for applications limited to 600 volts nominal or less, where the cable is not subject to physical damage and is terminated with fittings listed for the location?
Which type of cable should be used in restricted industrial establishments for applications limited to 600 volts nominal or less, where the cable is not subject to physical damage and is terminated with fittings listed for the location?
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Which one of the following is NOT a requirement for uninsulated exposed parts in Class II, Divisions 1 and 2 locations?
Which one of the following is NOT a requirement for uninsulated exposed parts in Class II, Divisions 1 and 2 locations?
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Which of the following types of machines are permitted to be installed in locations where accumulations of nonconductive, nonabrasive dust will be moderate and machines can be easily reached for routine cleaning and maintenance?
Which of the following types of machines are permitted to be installed in locations where accumulations of nonconductive, nonabrasive dust will be moderate and machines can be easily reached for routine cleaning and maintenance?
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What type of motors are permitted to be installed in Class II, Division 2 locations if the external surface temperatures, without a dust blanket, do not exceed the temperatures indicated under the maximum full-load (normal operation) conditions?
What type of motors are permitted to be installed in Class II, Division 2 locations if the external surface temperatures, without a dust blanket, do not exceed the temperatures indicated under the maximum full-load (normal operation) conditions?
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What type of luminaires are required in Class II, Division 1 locations for fixed and portable lighting?
What type of luminaires are required in Class II, Division 1 locations for fixed and portable lighting?
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What is the requirement for pendant luminaires in hazardous locations?
What is the requirement for pendant luminaires in hazardous locations?
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Which of the following is NOT a requirement for wiring methods in Class III, Division 1 locations?
Which of the following is NOT a requirement for wiring methods in Class III, Division 1 locations?
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Which of the following locations is NOT considered a Class III location according to the text?
Which of the following locations is NOT considered a Class III location according to the text?
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Which of the following is a requirement for equipment installed in Class III locations according to the text?
Which of the following is a requirement for equipment installed in Class III locations according to the text?
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Which of the following is a suitable wiring method for Class III, Division 1 locations according to the text?
Which of the following is a suitable wiring method for Class III, Division 1 locations according to the text?
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Which of the following is a requirement for bonding in hazardous locations?
Which of the following is a requirement for bonding in hazardous locations?
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Which of the following is NOT a suitable means of bonding in hazardous locations?
Which of the following is NOT a suitable means of bonding in hazardous locations?
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Where should the specific bonding means be permitted to end in hazardous locations?
Where should the specific bonding means be permitted to end in hazardous locations?
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Which one of the following is a requirement for wiring methods in Class I, Division 1 locations?
Which one of the following is a requirement for wiring methods in Class I, Division 1 locations?
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What type of enclosures are required for fixed lighting luminaires in hazardous locations?
What type of enclosures are required for fixed lighting luminaires in hazardous locations?
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Which of the following is a requirement for surge arresters and surge-protective devices installed in hazardous locations?
Which of the following is a requirement for surge arresters and surge-protective devices installed in hazardous locations?
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Which of the following is a requirement for liquidtight flexible metal conduit in hazardous locations?
Which of the following is a requirement for liquidtight flexible metal conduit in hazardous locations?
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Which type of enclosures are required for resistors and similar equipment in Class II, Division 1 locations?
Which type of enclosures are required for resistors and similar equipment in Class II, Division 1 locations?
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Which of the following is a requirement for surge arresters and surge-protective devices installed in a Class II, Division 1 location?
Which of the following is a requirement for surge arresters and surge-protective devices installed in a Class II, Division 1 location?
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Which one of the following is NOT a requirement for grounding and bonding in hazardous locations?
Which one of the following is NOT a requirement for grounding and bonding in hazardous locations?
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Which of the following is a requirement for the installation of intrinsically safe apparatus and associated apparatus?
Which of the following is a requirement for the installation of intrinsically safe apparatus and associated apparatus?
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What is the purpose of the control drawing(s) in the installation of intrinsically safe apparatus and associated apparatus?
What is the purpose of the control drawing(s) in the installation of intrinsically safe apparatus and associated apparatus?
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Where can intrinsically safe apparatus be installed?
Where can intrinsically safe apparatus be installed?
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What is the requirement for enclosures of simple apparatus in hazardous locations?
What is the requirement for enclosures of simple apparatus in hazardous locations?
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Which of the following standards is used for construction and performance requirements for intrinsically safe (IS) systems in the United States?
Which of the following standards is used for construction and performance requirements for intrinsically safe (IS) systems in the United States?
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What is the purpose of an acceptable ground detector in the power supply to contact conductors?
What is the purpose of an acceptable ground detector in the power supply to contact conductors?
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What is the purpose of current collectors in a system?
What is the purpose of current collectors in a system?
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What type of enclosures are commonly used for associated apparatus installed in hazardous locations?
What type of enclosures are commonly used for associated apparatus installed in hazardous locations?
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Which one of the following is a requirement for portable lighting equipment in hazardous locations?
Which one of the following is a requirement for portable lighting equipment in hazardous locations?
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What is the requirement for flexible cords in Class III, Divisions 1 and 2 locations?
What is the requirement for flexible cords in Class III, Divisions 1 and 2 locations?
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Which one of the following is a requirement for receptacles and attachment plugs in Class III, Division 1 and Division 2 locations?
Which one of the following is a requirement for receptacles and attachment plugs in Class III, Division 1 and Division 2 locations?
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What is the requirement for electric cranes, hoists, and similar equipment in Class III, Divisions 1 and 2 locations?
What is the requirement for electric cranes, hoists, and similar equipment in Class III, Divisions 1 and 2 locations?
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Which of the following is a requirement for separating intrinsically safe conductors from nonintrinsically safe conductors in raceways, cable trays, and cables?
Which of the following is a requirement for separating intrinsically safe conductors from nonintrinsically safe conductors in raceways, cable trays, and cables?
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What is the purpose of physically and electrically separating non-IS circuits and IS circuits in an IS system?
What is the purpose of physically and electrically separating non-IS circuits and IS circuits in an IS system?
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Which of the following methods can be used to separate conductors of intrinsically safe circuits from conductors of nonintrinsically safe circuits within enclosures?
Which of the following methods can be used to separate conductors of intrinsically safe circuits from conductors of nonintrinsically safe circuits within enclosures?
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What is the requirement for separating conductors and cables of intrinsically safe circuits from conductors and cables of nonintrinsically safe circuits when they run in other than raceway or cable tray systems?
What is the requirement for separating conductors and cables of intrinsically safe circuits from conductors and cables of nonintrinsically safe circuits when they run in other than raceway or cable tray systems?
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Which color is permitted to identify intrinsically safe conductors according to the text?
Which color is permitted to identify intrinsically safe conductors according to the text?
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What is the purpose of color coding in unclassified locations according to the text?
What is the purpose of color coding in unclassified locations according to the text?
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Why is identification necessary in unclassified locations according to the text?
Why is identification necessary in unclassified locations according to the text?
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Which of the following is a requirement for the installation of intrinsically safe apparatus and associated apparatus?
Which of the following is a requirement for the installation of intrinsically safe apparatus and associated apparatus?
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What is the purpose of the control drawing(s) in the installation of intrinsically safe apparatus and associated apparatus?
What is the purpose of the control drawing(s) in the installation of intrinsically safe apparatus and associated apparatus?
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Which of the following is a requirement for surge arresters and surge-protective devices installed in hazardous locations?
Which of the following is a requirement for surge arresters and surge-protective devices installed in hazardous locations?
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Which of the following is a requirement for grounding electrode connections for zener diode barriers in hazardous locations?
Which of the following is a requirement for grounding electrode connections for zener diode barriers in hazardous locations?
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What is the purpose of maintaining a low-impedance path to ground for zener diode barrier systems?
What is the purpose of maintaining a low-impedance path to ground for zener diode barrier systems?
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Which of the following electrodes is required to be used for grounding electrode connections in hazardous locations?
Which of the following electrodes is required to be used for grounding electrode connections in hazardous locations?
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What is the requirement for sealing conduits and cables in hazardous locations?
What is the requirement for sealing conduits and cables in hazardous locations?
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