eep April 7, 2025 NEC 200-285 NEC Quizzes Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% Article 200-285 Part07 This comprehensive quiz contains 50 questions carefully selected from the National Electrical Code (NEC) Articles spanning 200 through 285. These articles cover a broad spectrum of vital topics related to electrical installations within this section of the code. The questions in this quiz are chosen randomly to provide a thorough assessment of your knowledge across these essential NEC articles. While we strive for a diverse set of questions, some fundamental principles may be revisited in different contexts due to their relevance to multiple sections within this range. This approach ensures a robust evaluation of your understanding. We encourage you to actively participate and provide feedback. If you identify any issues or have suggestions for improving the quiz questions, please report them. Your contributions are invaluable in helping us maintain the accuracy and effectiveness of these learning resources. Consider the importance of easy access to GFCI protection for resetting and testing. 1 / 50 The GFCI protection required by 210.8(A), (B), (C), (D), and (E) shall be _____. a. readily accessible b. accessible c. The circuit breaker type only d. concealed Incorrect. The correct answer is readily accessible. GFCI protection must be easily accessible for safe operation and maintenance. Correct! The GFCI protection required by NEC Article 210.8(A), (B), (C), (D), and (E) must be readily accessible. According to NEC Article 210.8, the GFCI protection required in various locations must be readily accessible to ensure that users can easily reset or test the device. Consider the types of certifications or labels that indicate compliance with safety standards for electrical equipment. 2 / 50 The service disconnecting means rated 1,000V or less shall be marked to identify it as being suitable for use as service equipment and shall be __. a. weatherproof b. listed or field labelled c. acceptable d. approved Incorrect. The correct answer is listed or field labeled. This ensures that the service disconnecting means meets safety standards. Correct! The service disconnecting means rated 1,000V or less must be marked as suitable for use as service equipment and shall be listed or field labeled, as specified in NEC Article 230.70. According to NEC Article 230.70, the service disconnecting means rated 1,000V or less must be marked to identify it as suitable for use as service equipment and shall be listed or field labeled to ensure safety and compliance. Think about the importance of tenant safety and accessibility to the overcurrent devices that protect their circuits. 3 / 50 As long as a qualified electrician has access to the overcurrent devices for the branch circuit, it does not matter if the commercial building’s tenant has access to them. a. False b. True Incorrect. Tenants in commercial buildings must have access to the overcurrent devices that protect their branch circuits, according to NEC Article 240.24(B). Correct! NEC Article 240.24(B) requires tenants to have access to the overcurrent devices for their branch circuits. According to NEC Article 240.24(B), tenants in commercial buildings must have access to the overcurrent protection devices for their branch circuits. This allows them to safely disconnect or reset the devices as needed, rather than relying solely on a qualified electrician. Think about the different ways lighting can be controlled for outdoor entrances with grade-level access. 4 / 50 In a dwelling unit, illumination for outdoor entrances that have grade-level access can be controlled by _______ control. a. remote b. any of these c. automatic d. central Incorrect. The correct answer is any of these. NEC Article 210.70(A)(2)(b) allows outdoor entrance lighting to be controlled by remote, central, or automatic systems. Correct! NEC Article 210.70(A)(2)(b) permits illumination for outdoor entrances with grade-level access in a dwelling unit to be controlled by remote, central, or automatic controls, providing flexibility in how the lighting is managed. According to NEC Article 210.70(A)(2)(b), illumination for outdoor entrances with grade-level access in a dwelling unit can be controlled by remote, central, or automatic means. This provides flexibility for homeowners in how they manage the outdoor lighting at entry points. Consider how grounding practices are implemented in buildings without intersystem bonding to ensure proper electrical safety. 5 / 50 For buildings with a grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to the power service accessible means external to enclosures using the options identified in 250.94(A). a. False b. True Incorrect. The correct answer is True. NEC Article 250.94 requires that the grounding electrode conductor for communications circuits terminate to the power service accessible means in buildings without an intersystem bonding termination. Correct! NEC Article 250.94 confirms that for buildings with a grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to accessible grounding means at the power service. According to NEC Article 250.94, it is true that for buildings with a grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits should terminate to accessible grounding means at the power service, using the specified options in 250.94(A). For devices rated over 800 amperes, the conductor ampacity must always match or exceed the rating of the overcurrent device. 6 / 50 Where the overcurrent device is rated over 800 amperes, the ampacity of the conductors it protects shall be equal to or greater than the rating of the overcurrent device. a. True b. False Incorrect. For overcurrent devices rated over 800 amperes, the conductors must have an ampacity equal to or greater than the rating of the device, according to NEC Article 240.4(C). Correct! NEC Article 240.4(C) requires that conductors protected by an overcurrent device rated over 800 amperes must have an ampacity equal to or greater than the rating of the device. According to NEC Article 240.4(C), if an overcurrent protection device is rated at over 800 amperes, the conductors it protects must have an ampacity equal to or greater than the device’s rating. This ensures safe operation by preventing the conductors from being undersized for the protection device. Think about the standard interrupting rating that does not require special marking and when it must be labeled on the breaker. 7 / 50 Every breaker having an interrupting rating other than _____ is required to have its interrupting rating shown on the breaker. a. 7500 b. 9000 c. 2500 d. 5000 Incorrect. NEC Article 240.83(C) requires that every breaker with an interrupting rating other than 5000 amps must have its rating shown on the breaker. Correct! Breakers with an interrupting rating other than 5000 amps must have their rating displayed, as per NEC Article 240.83(C). According to NEC Article 240.83(C), any breaker with an interrupting rating other than 5000 amps must have its rating displayed on the breaker. This marking ensures the breaker can safely interrupt the system’s fault current. Think about what aspects of grounded conductors and their identification are covered by NEC Article 200. 8 / 50 Article 200 provides the requirements for _______. a. identification of terminals b. grounded conductors in premises wiring systems c. identification of grounded conductors d. all of these Incorrect. The correct answer is all of these. NEC Article 200 covers identification of grounded conductors, terminals, and their use in premises wiring systems. Correct! NEC Article 200 covers all of these topics, including the identification of terminals, grounded conductors, and their proper use in premises wiring systems. NEC Article 200 outlines the requirements for the identification of grounded conductors, terminals, and the use of grounded conductors in premises wiring systems. It ensures that conductors and terminals are correctly identified to maintain electrical safety and proper system functioning. This article applies to a wide range of identification practices necessary in electrical installations. Remember that standard overcurrent devices are typically limited to 80% of their rating for continuous loads unless rated for 100%. 9 / 50 Unless the overcurrent device and the equipment that encloses it, such as a panelboard or enclosure, is rated at 100% of its rating, continuous loads are limited to not more than __% of the rating. a. 100 b. 80 c. 90 d. 70 Incorrect. Continuous loads are limited to 80% of the overcurrent device’s rating unless both the device and enclosure are rated for 100%, as per NEC Articles 210.19(A)(1) and 215.2(A)(1). Correct! Continuous loads must not exceed 80% of the overcurrent device’s rating unless the device is rated for 100% operation, according to NEC Articles 210.19(A)(1) and 215.2(A)(1). According to NEC Articles 210.19(A)(1) and 215.2(A)(1), unless an overcurrent device and its enclosure are rated for 100% of their capacity, continuous loads must not exceed 80% of the device’s rating. This ensures safe operation and prevents overheating under sustained load conditions. Think about what ensures that the hub is suitable for service-entrance applications and meets safety standards. 10 / 50 Where conduits are used as service masts, hubs shall be ______ for use with service-entrance equipment. a. approved b. of a heavy-duty type c. identified d. listed Incorrect. The correct answer is identified, as per NEC Article 230.28. Hubs must be identified for use with service-entrance equipment to ensure safety and compliance. Correct! Hubs used with service masts must be identified for use with service-entrance equipment, as specified in NEC Article 230.28, to ensure they are suitable and safe for service applications. According to NEC Article 230.28, when conduits are used as service masts, the hubs must be identified for use with service-entrance equipment. This ensures that the hubs meet the necessary safety and performance requirements for handling service conductors and are suitable for outdoor and service-related applications. Consider the common element that service-entrance conductors must be protected from entering the raceway or equipment. 11 / 50 Service-entrance and overhead service conductors shall be arranged so that ____ will not enter the service raceway or equipment. a. vapor b. water c. none of these d. dust Incorrect. The correct answer is water. NEC Article 230.54(C) requires that service-entrance conductors be arranged to prevent water from entering the service raceway or equipment. Correct! NEC Article 230.54(C) mandates that service-entrance and overhead service conductors must be arranged to ensure that water does not enter the service raceway or equipment, ensuring safety and preventing moisture-related hazards. According to NEC Article 230.54(C), service-entrance and overhead service conductors must be arranged in such a way that water cannot enter the service raceway or equipment, which helps prevent electrical hazards related to moisture. Think about how a fuse’s voltage rating must meet or exceed the system’s voltage to ensure safe operation. 12 / 50 If a fuse is rated 250 volts or greater, it is permitted to be used on a 208-volt system. a. False b. True Incorrect. A fuse rated 250 volts or greater can be used on a 208-volt system, as the voltage rating of the fuse must be equal to or greater than the system voltage, according to NEC Article 240.60. Correct! A fuse rated 250 volts is permitted to be used on a 208-volt system, as per NEC Article 240.60. According to NEC Article 240.60, a fuse rated 250 volts or greater can safely be used on a system with a lower voltage, such as 208 volts. The voltage rating of the fuse must be equal to or higher than the system voltage to ensure it can interrupt the circuit safely in the event of an overcurrent. 14 AWG conductors have a lower ampacity than 12 AWG conductors, and their overcurrent protection is typically limited to 15 amperes. 13 / 50 The maximum overcurrent protection provided for 14 AWG copper conductors is _______ amperes. a. 25 b. 15 c. 20 d. 30 Incorrect. The maximum overcurrent protection for 14 AWG copper conductors is 15 amperes, as per NEC Article 240.4(D)(3). Correct! NEC Article 240.4(D)(3) specifies that the maximum overcurrent protection for 14 AWG copper conductors is 15 amperes. According to NEC Article 240.4(D)(3), the maximum overcurrent protection for 14 AWG copper conductors is 15 amperes. This rating helps protect the conductor from carrying too much current, which could lead to overheating and damage to the electrical system. Think about the types of metal structures that can serve as effective grounding electrodes when they are in direct contact with the earth. 14 / 50 Metal in-ground support structures permitted as grounding electrodes include, but are not limited to, pilings, casings, and other structural metal. a. False b. True Incorrect. The correct answer is True. Metal in-ground support structures like pilings and casings are permitted as grounding electrodes, as specified in NEC Article 250.52(A)(2). Correct! NEC Article 250.52(A)(2) allows metal in-ground support structures such as pilings, casings, and other structural metal to be used as grounding electrodes, provided they are in contact with the earth. According to NEC Article 250.52(A)(2), metal in-ground support structures such as pilings, casings, and other structural metal that are in contact with the earth can be used as grounding electrodes. These structures provide a reliable grounding path because of their contact with the earth, making them suitable for use in electrical systems. Focus on the NEC article that governs overcurrent protection to ensure the safe operation of conductors and electrical systems. 15 / 50 NEC Article ___ sets forth the requirements for overcurrent protection of conductors and overcurrent devices. a. 200 b. 210 c. 220 d. 240 Incorrect. NEC Article 240 sets forth the requirements for overcurrent protection of conductors and devices, ensuring that circuits are protected from excessive current. Correct! NEC Article 240 covers the requirements for overcurrent protection of conductors and devices. NEC Article 240 establishes the rules for protecting conductors and overcurrent devices from excessive current. It provides the standards for sizing and installing fuses and circuit breakers to prevent overheating and electrical hazards in circuits. Think about which conductor in a separately derived system is responsible for carrying unbalanced current. 16 / 50 Separately derived system generators shall have the _______ conductor sized not smaller than required to carry the maximum unbalanced current as determined by _______. a. grounding b. neutral c. none of these d. a and b Incorrect. The correct answer is neutral. The neutral conductor in a separately derived system must be sized to carry the maximum unbalanced current, as required by NEC Article 250.30(A)(3). Correct! NEC Article 250.30(A)(3) requires that the neutral conductor in a separately derived system be sized to carry the maximum unbalanced current, ensuring safe and proper operation of the system. According to NEC Article 250.30(A)(3), the neutral conductor for a separately derived system must be sized to handle the maximum unbalanced current. This ensures that any load imbalance in the system is properly managed without overloading the neutral conductor, preventing potential hazards. Think about the certifications and ratings necessary to ensure that electrical components meet safety and performance standards. 17 / 50 Individual meter socket enclosures shall not be considered service equipment but shall be __ for the voltage and ampacity of the service. a. listed and rated b. inspected and rated c. none of these d. labeled and approved Incorrect. The correct answer is listed and rated. This requirement ensures that the meter socket enclosures can safely handle the specified electrical service. Correct! Individual meter socket enclosures shall be listed and rated for the voltage and ampacity of the service, as stated in NEC Article 230.71. According to NEC Article 230.71, individual meter socket enclosures must be listed and rated for the voltage and ampacity of the service to ensure they are suitable for the intended application. Think about the maximum height allowed for safe and easy access to electrical panels. 18 / 50 Panels containing fuses and circuit breakers shall be readily accessible and installed so the center of the grip of the operating handle of the switch or circuit breaker, when in its highest position, is not more than __ above the floor or working platform. a. 5 ft b. 2 ft c. 6 ft 7 in d. 4 ft 6 in Incorrect. The correct answer is 6 ft 7 in. This height ensures that the operating handles of switches or circuit breakers are within easy reach for safe operation. Correct! The working clearance space for outdoor installations shall include the zone described in 110.26(D), as specified in the NEC. According to NEC Article 240.24, panels containing fuses and circuit breakers must be installed so that the center of the grip of the operating handle does not exceed 6 ft 7 in above the floor or working platform for accessibility. The overcurrent protection device should match or be lower than the conductor’s ampacity to ensure safety. 19 / 50 If a conductor’s maximum ampacity is 115 amperes, we can use a 125-ampere circuit breaker to protect that circuit as long as the current doesn’t exceed 115 amperes. a. True b. False Incorrect. A 125-ampere breaker is too large to protect a conductor with a maximum ampacity of 115 amperes. The overcurrent protection must match or be lower than the conductor’s ampacity to ensure safety, as per NEC Article 240.4. Correct! A 125-ampere breaker is too large for a conductor with a maximum ampacity of 115 amperes, according to NEC Article 240.4. According to NEC Article 240.4, the ampacity of the conductor must not exceed the rating of the overcurrent protection device. In this case, a 125-ampere circuit breaker is too large to protect a conductor with a maximum ampacity of 115 amperes, as it could allow the conductor to overheat before tripping. Consider the distinctions between requirements for utility-controlled equipment and those for general electrical installations. 20 / 50 Individual meter sockets supplied by and under the exclusive control of an electric utility shall not be required to be __ in accordance with 230.66. a. all of these b. approved c. rated d. listed Incorrect. The correct answer is listed. These meter sockets do not need to meet listing requirements due to the control of the electric utility. Correct! Individual meter sockets supplied by and under the exclusive control of an electric utility shall not be required to be listed, as specified in NEC Article 230.66. According to NEC Article 230.66, individual meter sockets supplied by and under the exclusive control of an electric utility shall not be required to be listed, allowing for flexibility in the installation and regulation of these sockets. Consider the essential equipment that allows each occupant to manage their electrical service independently. 21 / 50 In a multiple-occupancy building, each occupant shall have access to the occupant’s __________. a. lateral conductors b. distribution transformer c. service drops d. service disconnecting means Incorrect. The correct answer is service disconnecting means. NEC Article 230.2(A) mandates that each occupant in a multiple-occupancy building must have access to their own service disconnecting means. Correct! NEC Article 230.2(A) requires that in a multiple-occupancy building, each occupant must have access to their own service disconnecting means to ensure safety and independence in managing their electrical service. According to NEC Article 230.2(A), in a multiple-occupancy building, it is required that each occupant has access to their own service disconnecting means. This access is crucial for safety, enabling occupants to disconnect power as needed without affecting other units. Consider the load that would have the greatest impact on the feeder’s capacity when noncoincident loads are unlikely to operate at the same time. 22 / 50 Where it is unlikely that two or more noncoincident loads will be in use simultaneously, only the ______ of the loads used at one time is required to be used in computing the total load to a feeder. a. difference between b. smaller of c. largest of d. none of these Incorrect. The correct answer is largest of. According to NEC Article 220.60, only the largest noncoincident load is used in the total load calculation when two or more loads are unlikely to be used at the same time. Correct! NEC Article 220.60 specifies that when two or more noncoincident loads are unlikely to be in use simultaneously, only the largest of the loads is considered in the total load calculation for a feeder. According to NEC Article 220.60, when it is unlikely that two or more noncoincident loads will be in use simultaneously, only the largest of the loads is required to be used when calculating the total load for a feeder. This ensures that the feeder is properly sized for the maximum possible load without overestimating the total demand. Consider the impact of intersystem bonding on grounding requirements for communication systems. 23 / 50 For community antenna television and radio distribution systems, where the building or structure served has an intersystem bonding termination established, 250.94(A) shall apply. a. True b. False Incorrect. The correct answer is True. NEC Article 250.94(A) indicates that the requirements apply when there is an intersystem bonding termination in place for these systems. Correct! NEC Article 250.94(A) confirms that for community antenna television and radio distribution systems, if the building or structure served has an intersystem bonding termination established, this article’s provisions shall apply. According to NEC Article 250.94(A), it is true that for community antenna television and radio distribution systems, when the building or structure served has an established intersystem bonding termination, the provisions of this article apply to ensure proper grounding and bonding practices. Think about the type of system where a bonding jumper connects grounded conductors and equipment grounding conductors. 24 / 50 The connection between the grounded circuit conductor and the supply-side bonding jumper or equipment grounding conductor, or both, at a _______ is called a “system bonding jumper.” a. motor control center b. service disconnect c. separately derived system d. motor control center Incorrect. The correct answer is separately derived system, as specified in NEC Article 250.30(A)(1). A system bonding jumper is used to connect grounded conductors and equipment grounding conductors in these systems. Correct! The connection between the grounded circuit conductor and the supply-side bonding jumper or equipment grounding conductor is called a “system bonding jumper” in a separately derived system, as required by NEC Article 250.30(A)(1). According to NEC Article 250.30(A)(1), a system bonding jumper is required to connect the grounded circuit conductor to the supply-side bonding jumper or equipment grounding conductor in a separately derived system. This connection ensures proper grounding and bonding for electrical safety in systems like transformers or generators, which are considered separately derived. Consider the range of ampere ratings available for fuses used in various applications. 25 / 50 The standard ampere ratings for fuses include(s) __. a. 6A b. 601A c. all of these d. 1A Incorrect. The correct answer is all of these. Standard fuse ratings cover a range of ampere values. Correct! The standard ampere ratings for fuses include 1A, 6A, 601A, and thus the correct answer is all of these as specified in NEC Article 240.5. According to NEC Article 240.5, the standard ampere ratings for fuses encompass a wide range, including 1A, 6A, 601A, and therefore the correct answer is all of these. Think about the types of circuits that distribute power to outlets and devices within a building. 26 / 50 Article 210 provides the general requirements for ______. a. branch circuits b. ungrounded conductors c. feeder conductors d. outside branch circuits Incorrect. The correct answer is branch circuits. Article 210 focuses on the general requirements and guidelines pertaining to these circuits. Correct! Article 210 provides the general requirements for branch circuits, as specified in the NEC. According to NEC Article 210, this article provides the general requirements for branch circuits, which are responsible for delivering electrical power to various loads within a structure. Consider how the path of an appliance’s cord would typically navigate the space around a sink or bathtub. 27 / 50 For the application of GFCI protection for personnel, when determining distance from receptacles for sinks [210.8(A)(7) and 210.8(B)(5)] and bathtubs or shower stalls [210.8(A)(9)], the distance shall be measured as the _____ path the cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or passing through a door, doorway, or window. a. shortest b. none of these c. longest d. most direct Incorrect. The correct answer is shortest. The distance is measured based on the shortest path the cord would take without passing through barriers. Correct! For GFCI protection application, the distance from receptacles shall be measured as the shortest path the cord of an appliance would follow, as stated in NEC Article 210.8. According to NEC Article 210.8, for the application of GFCI protection, the distance from receptacles for sinks and bathtubs or shower stalls shall be measured as the shortest path that the cord of an appliance would follow. Consider the common ampacity allowed for 12 AWG copper conductors. 28 / 50 The maximum overcurrent protection for 12 AWG copper conductors is _______ amperes. a. 30 b. 15 c. 20 d. 25 Incorrect. The maximum overcurrent protection for 12 AWG copper conductors is 20 amperes, as outlined in NEC Article 240.4(D)(5). Correct! NEC Article 240.4(D)(5) specifies that the maximum overcurrent protection for 12 AWG copper conductors is 20 amperes. According to NEC Article 240.4(D)(5), 12 AWG copper conductors are limited to a maximum overcurrent protection of 20 amperes. This rating ensures that the conductor is protected from excessive heat and current, which could result in damage or fire hazards. Consider how both grounding and bonding are essential for the effectiveness of lightning protection systems. 29 / 50 NFPA 780, Standard for the Installation of Lightning Protection Systems, provides information on the installation of __ for lightning protection systems [250.4(A)(1)]. a. a and b b. none of these c. grounding d. bonding Incorrect. The correct answer is a and b. NFPA 780 covers both grounding and bonding for effective lightning protection systems. Correct! NFPA 780, Standard for the Installation of Lightning Protection Systems, provides information on the installation of grounding and bonding for lightning protection systems, as specified in NEC Article 250.4(A)(1). According to NEC Article 250.4(A)(1), NFPA 780 provides information on the installation of both grounding and bonding for lightning protection systems, making the correct answer a and b. Consider the minimum number of fixed appliances required before applying a demand factor to reduce the total load. 30 / 50 When sizing a feeder for the fixed appliance loads in dwelling units, a demand factor of 75 percent of the total nameplate ratings can be applied if there are ______ or more appliances fastened in place on the same feeder. a. 4 b. 3 c. 5 d. 2 Incorrect. The correct answer is 4 appliances. According to NEC Article 220.53, a demand factor of 75% can be applied when there are four or more fixed appliances on the same feeder. Correct! NEC Article 220.53 allows a demand factor of 75% of the total nameplate ratings when there are four or more fixed appliances fastened in place on the same feeder in a dwelling unit. This helps to account for the reduced likelihood of all appliances running at full capacity simultaneously. According to NEC Article 220.53, when sizing a feeder for dwelling units, a demand factor of 75% of the total nameplate ratings can be applied if there are four or more fixed appliances fastened in place and supplied by the same feeder. This demand factor accounts for the fact that not all appliances are likely to operate simultaneously at their full rated capacity. Focus on the NEC article that deals with labeling and marking requirements for equipment to ensure safety and compliance in series-rated systems. 31 / 50 NEC __________ requires that the manufacturer of a series-rated panel must legibly mark the equipment. a. 240.86(B) b. 240.63(C) c. 240.2 d. 240.4(A) Incorrect. NEC Article 240.86(B) mandates that series-rated panels be legibly marked by the manufacturer to ensure proper installation and safety. Correct! NEC Article 240.86(B) requires manufacturers to legibly mark series-rated panels. NEC Article 240.86(B) requires that the manufacturer of a series-rated panel must legibly mark the equipment. This labeling ensures that the panel is used correctly in series-rated applications, which involves using protective devices in series to handle fault currents safely. Consider the purpose of disconnecting means and their relationship to overcurrent protection devices. 32 / 50 Where fuses are used as the service overcurrent device, the disconnecting means shall be located ahead of the load side of the fuses in accordance with 230.91. a. False b. True Incorrect. The correct answer is False. The location of the disconnecting means in relation to the fuses does not always require it to be ahead of the load side. Correct! It is False that the disconnecting means must be located ahead of the load side of the fuses, as specified in NEC Article 230.91. According to NEC Article 230.91, it is False that the disconnecting means must be located ahead of the load side of the fuses. The disconnecting means can be located at different positions depending on the installation. Think about safety requirements in areas of a dwelling that may have a higher risk of electrical hazards. 33 / 50 GFCI protection shall be provided for all 15A and 20A, 125V single-phase receptacles in dwelling units’ unfinished portions or areas of basements not intended as habitable rooms. a. True b. False Incorrect. The correct answer is True. GFCI protection is required for receptacles in unfinished areas of dwelling units to ensure safety. Correct! It is True that GFCI protection must be provided for all 15A and 20A, 125V single-phase receptacles in unfinished portions or areas of basements not intended as habitable rooms, as specified in NEC Article 210.8(A)(5). According to NEC Article 210.8(A)(5), it is True that GFCI protection is required for all 15A and 20A, 125V single-phase receptacles in the unfinished portions or areas of basements not intended as habitable rooms. Think about the requirements for grounding in systems that lack an intersystem bonding termination. 34 / 50 For community antenna television and radio distribution systems, where the building or structure served has no intersystem bonding termination, the bonding conductor or grounding electrode conductor can be connected to the power service accessible means external to enclosures using the options identified in 250.94(A) Ex. a. False b. True Incorrect. The correct answer is True. NEC Article 250.94(A) Ex specifies that in the absence of an intersystem bonding termination, the bonding conductor or grounding electrode conductor can be connected to an accessible power service grounding means. Correct! NEC Article 250.94(A) Ex confirms that for community antenna television and radio distribution systems without an intersystem bonding termination, the bonding conductor or grounding electrode conductor may be connected to the power service accessible means external to enclosures. According to NEC Article 250.94(A) Ex, it is true that for community antenna television and radio distribution systems, if the building or structure served does not have an intersystem bonding termination, the bonding conductor or grounding electrode conductor can be connected to the accessible grounding means at the power service external to the enclosures. Consider the importance of easy access to GFCI protection for resetting and testing. 35 / 50 The GFCI protection required by 210.8(A), (B), (C), (D), and (E) shall be _____. a. The circuit breaker type only b. accessible c. concealed d. readily accessible Incorrect. The correct answer is readily accessible. GFCI protection must be easily accessible for safe operation and maintenance. Correct! The GFCI protection required by NEC Article 210.8(A), (B), (C), (D), and (E) must be readily accessible. According to NEC Article 210.8, the GFCI protection required in various locations must be readily accessible to ensure that users can easily reset or test the device. Consider the point where all grounding connections should terminate to create an effective path for ground faults. 36 / 50 For grounded systems, normally noncurrent-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the _______ to establish an effective ground-fault current path. a. none of these b. electrical supply source c. earth d. ground Incorrect. The correct answer is electrical supply source. NEC Article 250.4(A)(3) requires that noncurrent-carrying conductive materials be connected to the electrical supply source to establish an effective ground-fault current path. Correct! NEC Article 250.4(A)(3) states that noncurrent-carrying conductive materials must be connected to the electrical supply source to create an effective ground-fault current path, ensuring electrical safety. According to NEC Article 250.4(A)(3), for grounded systems, the noncurrent-carrying conductive materials must be connected to the electrical supply source to provide an effective ground-fault current path. This connection ensures the proper function of grounding systems and helps clear faults safely. Focus on the NEC article that deals with branch circuits, particularly those that share a neutral conductor, known as multiwire branch circuits. 37 / 50 NEC _______ contains the requirements for multiwire branch circuits. a. 260.8 b. 210.65 c. 410.65 d. 210.4 Incorrect. The requirements for multiwire branch circuits are found in NEC Article 210.4, which specifies how these circuits should be installed and protected. Correct! NEC Article 210.4 contains the requirements for multiwire branch circuits. NEC Article 210.4 outlines the requirements for multiwire branch circuits, which are designed to share a neutral conductor between multiple ungrounded (hot) conductors. The article provides guidance on conductor sizing, overcurrent protection, and safe installation practices to ensure system reliability and safety. Focus on the NEC list of standard ampere ratings for fuses and nonadjustable circuit breakers, ensuring you choose only those that are standard. 38 / 50 Select all the standard ampere ratings for fuses and nonadjustable circuit breakers. a. 30 b. 25 c. 10 d. 15 e. 20 f. 35 Incorrect. The standard ampere ratings for fuses and nonadjustable circuit breakers include 15A, 20A, 25A, 30A, and 35A, as specified in NEC Article 240.6(A). Correct! The standard ampere ratings for fuses and nonadjustable circuit breakers include 15A, 20A, 25A, 30A, and 35A, according to NEC Article 240.6(A). According to NEC Article 240.6(A), the standard ampere ratings for fuses and nonadjustable circuit breakers include 15A, 20A, 25A, 30A, and 35A, among others. These ratings ensure proper overcurrent protection for circuits and equipment. Overcurrent protection devices must operate in such a way that they disconnect all conductors in the circuit simultaneously to maintain safe operation. 39 / 50 Overcurrent protection devices are also permitted in ground conductors if they open all conductors of the circuit at the same time. a. True b. False Incorrect. Overcurrent protection devices are allowed in grounded conductors if they open all conductors of the circuit simultaneously, as per NEC Article 240.22. Correct! NEC Article 240.22 permits overcurrent devices in grounded conductors if they open all conductors in the circuit at the same time. According to NEC Article 240.22, overcurrent protection devices can be installed in grounded conductors if they are designed to open all conductors of the circuit simultaneously. This ensures that no part of the circuit remains energized, which is critical for safety during fault conditions. Consider the maximum number of switches or breakers allowed to act as disconnects in a feeder-supplied building. 40 / 50 There shall be no more than ______ switches or circuit breakers to serve as the disconnecting means for a building supplied by a feeder. a. 8 b. 6 c. 4 d. 2 Incorrect. The correct answer is 6. NEC Article 225.33(A) limits the number of switches or circuit breakers that can be used as disconnecting means to six for a building supplied by a feeder. Correct! NEC Article 225.33(A) states that no more than six switches or circuit breakers may be used as the disconnecting means for a building supplied by a feeder, ensuring safety and simplicity in power disconnection. According to NEC Article 225.33(A), the number of disconnecting means for a building supplied by a feeder shall not exceed six. This rule limits the number of switches or circuit breakers used for disconnecting the building from its power supply to ensure easy and safe access in case of an emergency. Think about whether any coatings on contact surfaces could interfere with the grounding process. 41 / 50 ________ on equipment to be grounded shall be removed from contact surfaces to ensure good electrical continuity. a. any of these b. paint c. lacquer d. enamel Incorrect. The correct answer is any of these. NEC Article 250.12 requires that coatings like paint, lacquer, or enamel be removed from surfaces to ensure good electrical continuity for grounding. Correct! NEC Article 250.12 specifies that paint, lacquer, enamel, or any other non-conductive coatings must be removed from contact surfaces on equipment to ensure good electrical continuity for grounding. According to NEC Article 250.12, non-conductive coatings such as paint, lacquer, or enamel must be removed from contact surfaces on equipment that requires grounding. This ensures that there is a solid electrical connection for the grounding system, providing safety and proper functioning. Consider the type of fault currents that would cause significant damage if left unchecked, which a current-limiting device would need to mitigate. 42 / 50 To be classified as current limiting, a fuse or circuit breaker is subjected to _____ fault currents. The fuse or breaker must reduce the fault current flowing into the circuit to a value less than the fault current that would have flowed into the circuit had there been no fuse or breaker in the circuit. a. Heavy b. Ground c. Arc d. Light Incorrect. A current-limiting fuse or breaker is subjected to heavy fault currents and is required to reduce the fault current to a safer level, as outlined in NEC Article 240.2. Correct! A fuse or breaker must handle heavy fault currents and reduce the current to protect the circuit, according to NEC Article 240.2. Current-limiting fuses and breakers are designed to handle heavy fault currents by reducing them to a safer level. This protection prevents excessive damage to the circuit and equipment in the event of a large fault. NEC Article 240.2 defines the criteria for current-limiting devices. Think about where the equipment grounding conductor needs to be placed for safety and compliance in non-metallic conduits. 43 / 50 Where equipment grounding is required for an installation of HDPE, a separate equipment grounding conductor shall be _________. a. A solid bare copper conductor b. A stranded bare copper conductor c. An insulated copper conductor d. Installed within the conduit Incorrect. The correct answer is that the equipment grounding conductor must be installed within the conduit in an HDPE installation to provide a proper grounding path, as per NEC requirements. Correct! In installations using HDPE conduit, the separate equipment grounding conductor must be installed within the conduit, ensuring compliance with NEC Article 250.118. This is necessary because HDPE is a non-conductive material and cannot provide a grounding path on its own. For installations using HDPE (High-Density Polyethylene) conduit, which is non-metallic, a separate equipment grounding conductor must be installed within the conduit to provide proper grounding, as HDPE itself is non-conductive. This ensures a reliable ground path in compliance with NEC Article 250.118. Other conductor types, like stranded or solid bare copper, are typically not installed in non-metallic conduits without insulation. Think about the best location for a disconnecting means to ensure safety for multiple circuits. 44 / 50 Where two or more branch circuits supply devices or equipment on the same yoke or mounting strap, a means to disconnect simultaneously the ungrounded supply conductors shall be provided at the _____. a. location of the device or equipment b. none of these c. point where the branch circuit originates d. point where the feeder originates Incorrect. The correct answer is point where the branch circuit originates. This location ensures that all circuits can be safely disconnected. Correct! A means to disconnect simultaneously the ungrounded supply conductors shall be provided at the point where the branch circuit originates, as specified in NEC Article 210.7. According to NEC Article 210.7, a means to disconnect simultaneously the ungrounded supply conductors for two or more branch circuits supplying devices or equipment on the same yoke or mounting strap shall be provided at the point where the branch circuit originates. Consider which table in the NEC provides information on sizing conductors based on their type and application. 45 / 50 The grounded conductor brought to service equipment shall be routed with the phase conductors and shall not be smaller than specified in Table __ when the service-entrance conductors are 1,100 kcmil copper and smaller. a. 310.16 b. 250.102(C)(1) c. 430.52 d. 250.122 Incorrect. The correct answer is 250.102(C)(1). This table specifies the minimum size for grounded conductors in relation to service-entrance conductors. Correct! The grounded conductor brought to service equipment shall be routed with the phase conductors and shall not be smaller than specified in Table 250.102(C)(1) when the service-entrance conductors are 1,100 kcmil copper and smaller. According to NEC Article 250.102(C)(1), when the service-entrance conductors are 1,100 kcmil copper and smaller, the grounded conductor brought to service equipment must be sized in accordance with the specifications outlined in this table. Think about how service-entrance equipment is typically positioned to ensure proper drainage and prevent water ingress. 46 / 50 Service heads on raceways or service-entrance cables and goosenecks in service-entrance cables shall be located __ the point of attachment, unless impracticable. a. below b. none of these c. above d. even with Incorrect. The correct answer is above. This positioning is necessary to prevent water accumulation and ensure proper drainage. Correct! Service heads on raceways or service-entrance cables and goosenecks must be located above the point of attachment, as specified in NEC Article 230.24. According to NEC Article 230.24, service heads on raceways or service-entrance cables and goosenecks must be located above the point of attachment to ensure that water does not enter the raceway or cable. Think about the specific articles that deal with overcurrent protection and fault current ratings, which are generally covered outside of Article 210. 47 / 50 NEC 210 and 210.6 set forth requirements for interrupting rating and protection against fault current. a. True b. False Incorrect. NEC Article 210 does not set forth requirements for interrupting rating or fault current protection; those topics are addressed in NEC Articles 110.9 and 240. Correct! NEC Article 210 and 210.6 do not cover interrupting ratings or fault current protection—those topics are addressed in other NEC articles. While NEC Article 210 covers the general requirements for branch circuits, including voltage limitations, it does not address the interrupting rating or protection against fault current. These topics are typically covered in NEC Article 110.9 and Article 240, which focus on overcurrent protection devices and their ratings. Think about who has the authority to approve exceptions for multiple services to a single building. 48 / 50 Additional services shall be permitted for a single building or other structure sufficiently large to make two or more services necessary if permitted by ______. a. the engineer of record b. the registered design professional c. special permission d. master electricians Incorrect. The correct answer is special permission. According to NEC Article 230.2(B), additional services are permitted only with special permission from the authority having jurisdiction, typically when justified by the building’s size or complexity. Correct! NEC Article 230.2(B) allows additional services for a single building or structure if permitted by special permission from the authority having jurisdiction. This is typically required when the size or configuration of the building justifies multiple services. According to NEC Article 230.2(B), additional services for a single building or structure are allowed only with special permission from the authority having jurisdiction (AHJ). This permission is granted when the building is large enough or has unique characteristics that make it necessary to have more than one service for practical or safety reasons. Consider how both grounding and bonding work together to ensure the safety and effectiveness of lightning protection systems. 49 / 50 NFPA 780, Standard for the Installation of Lightning Protection Systems, provides information on the installation of __ for lightning protection systems [250.4(B)(1)]. a. grounding b. a and b c. none of these d. bonding Incorrect. The correct answer is a and b. NFPA 780 covers the installation of both grounding and bonding for lightning protection systems. Correct! NFPA 780, Standard for the Installation of Lightning Protection Systems, provides information on the installation of grounding and bonding for lightning protection systems, as specified in NEC Article 250.4(B)(1). According to NEC Article 250.4(B)(1), NFPA 780 provides information on the installation of both grounding and bonding for lightning protection systems, making the correct answer a and b. Remember that overcurrent protection is intended to match the ampacity of the conductor to prevent overheating or damage. 50 / 50 Overcurrent protection is sized according to the ampacity of a conductor. a. True b. False Incorrect. Overcurrent protection is sized according to the ampacity of the conductor to prevent overloading, as specified in NEC Article 240.4. Correct! NEC Article 240.4 requires that overcurrent protection be sized according to the ampacity of the conductor. According to NEC Article 240.4, overcurrent protection devices, such as circuit breakers or fuses, must be sized according to the ampacity of the conductor. This ensures that the conductor can safely handle the current without being overloaded or damaged. Your score is LinkedIn Facebook Twitter 0% Restart quiz Exit Rate & Review Thank you for taking the time to leave us a review! Your feedback is greatly appreciated and helps us improve our services. Send feedback Leave a Reply Cancel replyYour email address will not be published. Required fields are marked * Comment* Name* Email* Website Save my name, email, and website in this browser for the next time I comment. Post Comment