Editor March 14, 2026 NEC 800-860 NEC Quizzes Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% Article 800-860 Part03 This quiz consists of 32 carefully selected questions covering NEC Articles 800 through 860, which provide essential guidelines for communications systems (Article 800) and related technologies. These sections of the National Electrical Code focus on the safety, installation, and operation of critical infrastructure like general communications circuits (Article 800), community antenna television (CATV) and radio distribution systems (Article 820), network-powered broadband communications systems (Article 830), and premises-powered broadband communications systems (Article 840), along with requirements for premises-powered broadband communication systems over optical fiber (Article 860). The randomly generated questions ensure a thorough assessment of your understanding, reinforcing key principles related to specialized communication system requirements, grounding and bonding for communication circuits, equipment protection, circuit routing and separation, and the integration of these distinct systems within buildings. Some topics may reappear in different contexts to strengthen comprehension and application. Your feedback is invaluable! If you notice any discrepancies or have suggestions for improvement, please report them. Your insights help maintain the accuracy and effectiveness of this learning tool. Consider the requirement for proper termination or identification to avoid being classified as abandoned. 1 / 32 Communications cables not terminated at both ends with a connector or other equipment and not identified for future use with a tag are considered abandoned. a. True b. False Incorrect. The correct answer is True. NEC Article 800.2 considers communications cables that are not terminated and not tagged for future use to be abandoned. Correct! NEC Article 800.2 states that communications cables that are not terminated at both ends and are not identified for future use with a tag are considered abandoned, requiring proper management. According to NEC Article 800.2, communications cables that are not terminated at both ends with a connector or equipment and not tagged for future use are considered abandoned. This classification ensures that unneeded cables are removed or handled to avoid clutter and potential fire hazards. Think about how different substances can affect the integrity and performance of wiring materials. 2 / 32 ____________ may result in an undetermined alteration of communications wire and cable properties. a. Cleaners or abrasives b. Any of these c. Paint or plaster d. Corrosive residues or other contaminants Incorrect. The correct answer is any of these. NEC Article 800.2 states that various substances, including paint and corrosive residues, can alter the properties of communications wires and cables. Correct! NEC Article 800.2 indicates that exposure to any of these substances—paint, cleaners, abrasives, or corrosive residues—may result in an undetermined alteration of the properties of communications wire and cable. According to NEC Article 800.2, exposure to any of these substances—paint, cleaners, abrasives, and corrosive residues—may result in an undetermined alteration of the properties of communications wire and cable, which can impact their functionality and reliability. Consider the safety requirements for cables installed in air-handling spaces like plenums and ducts. 3 / 32 CATVP cables are community antenna television coaxial cables that shall be listed for installation in ducts, plenums, and other spaces used for environmental air and shall also be listed as having adequate fire-resistant and low smoke-producing characteristics. a. True b. False Incorrect. The correct answer is True. NEC Article 820.179(A) requires that CATVP cables be listed for installation in ducts and plenums, and they must possess fire-resistant and low smoke-producing characteristics. Correct! NEC Article 820.179(A) specifies that CATVP cables must be listed for installation in ducts, plenums, and other environmental air spaces and must exhibit fire-resistant and low smoke-producing properties to ensure safety in case of fire. According to NEC Article 820.179(A), CATVP cables must be listed for use in ducts, plenums, and other environmental air spaces. These cables must have fire-resistant properties and produce low smoke to minimize fire hazards in such installations. Consider the alternative grounding options available when there is no intersystem bonding termination. 4 / 32 For buildings with grounding means but without an intersystem bonding termination, the grounding electrode conductor for communications circuits shall terminate to the nearest __________. a. any of these b. building or structure grounding electrode system c. service equipment enclosure d. interior metal water piping system, within 5 ft from its point of entrance Incorrect. The correct answer is any of these. When no intersystem bonding termination is available, the grounding electrode conductor for communications circuits can terminate to the nearest grounding electrode system, metal water piping system, or service equipment enclosure as per NEC Article 800.100(B). Correct! NEC Article 800.100(B) specifies that the grounding electrode conductor for communications circuits, when no intersystem bonding termination is available, must terminate to the building or structure grounding electrode system, interior metal water piping system (within 5 feet from entry), or service equipment enclosure. According to NEC Article 800.100(B), when there is no intersystem bonding termination available, the grounding electrode conductor for communications circuits must connect to the nearest grounding electrode system, metal water piping system (within 5 feet from entry), or service equipment enclosure. This ensures proper grounding for safety and system performance. 5 / 32 In a communications system, the inside conduit drops ____. a. are always grounded b. need not be grounded unless they can become energized c. are grounded at every second drop d. are inherently at ground The National Electrical Code (NEC) covers grounding requirements for various electrical systems, including communications systems in Article 800. According to NEC Table 800.5(A)(5), grounding for communications systems is generally not required unless the metallic conduit can become energized. This is because communications systems typically operate at low voltages and are isolated from the power grid. However, grounding is mandated if there's a potential for the metallic conduit to become energized. This can happen due to faults, surges, or improper installation. Consider the exception for the first 50 feet of coaxial cable entering a building and the listing requirements. 6 / 32 Coaxial cables installed in buildings for CATV shall be listed except for the first 50 ft that enters a building in accordance with 820.48. a. False b. True Incorrect. The correct answer is True. NEC Article 820.48 provides an exception for the first 50 feet of coaxial cable entering a building for CATV, which does not require listing if properly installed. Correct! NEC Article 820.48 specifies that coaxial cables installed in buildings for CATV must be listed, except for the first 50 feet that enters a building, as long as the installation complies with the code requirements for that section. According to NEC Article 820.48, coaxial cables installed in buildings must generally be listed, but an exception is made for the first 50 feet of cable that enters a building, which does not require listing as long as it is installed in compliance with this section. This allows for flexibility in certain installations. 7 / 32 Details on communications systems is in NEC Article 800. a. True b. False The National Electrical Code (NEC) dedicates Article 800 specifically to communication systems. This article establishes the general requirements for installation, operation, and maintenance of these systems. It covers a wide range of communication circuits, including: Telephone lines Data lines Community antenna television (CATV) systems Radio distribution systems Network-powered broadband communications systems Premises-powered broadband communications systems NEC Article 800 provides crucial information on various aspects of communication systems, such as: Wiring methods and materials (Section 800.15) Physical protection (Section 800.44) Grounding and bonding (Sections 800.50 – 800.54) Fire safety (Sections 800.50 – 800.53) By consulting NEC Article 800, electrical professionals ensure the safe and compliant installation of communication systems within buildings and structures. Consider the distance at which grounding requirements change based on protection zones. 8 / 32 Masts and metal structures supporting antennas shall be grounded in accordance with 810.21, unless the antenna and its related supporting mast or structure are within a zone of protection defined by a _______ radius rolling sphere. a. 75ft b. 150ft c. 100ft d. 125ft Incorrect. The correct answer is 150ft. NEC Article 810.21 states that masts and metal structures supporting antennas do not require grounding if they are within a 150-foot radius rolling sphere. Correct! NEC Article 810.21 indicates that masts and metal structures supporting antennas are required to be grounded unless they fall within a 150-foot radius rolling sphere, making the answer 150ft. According to NEC Article 810.21, masts and metal structures supporting antennas must be grounded unless they are within a zone of protection defined by a 150-foot radius rolling sphere, which negates the need for grounding in that area. Consider the safety requirements for cables installed in air-handling spaces like plenums and ducts. 9 / 32 CATVP cables are community antenna television coaxial cables that shall be listed for installation in ducts, plenums, and other spaces used for environmental air and shall also be listed as having adequate fire-resistant and low smoke-producing characteristics. a. True b. False Incorrect. The correct answer is True. NEC Article 820.179(A) requires that CATVP cables be listed for installation in ducts and plenums, and they must possess fire-resistant and low smoke-producing characteristics. Correct! NEC Article 820.179(A) specifies that CATVP cables must be listed for installation in ducts, plenums, and other environmental air spaces and must exhibit fire-resistant and low smoke-producing properties to ensure safety in case of fire. According to NEC Article 820.179(A), CATVP cables must be listed for use in ducts, plenums, and other environmental air spaces. These cables must have fire-resistant properties and produce low smoke to minimize fire hazards in such installations. Think about the article that governs installations related to television, radio, and antenna systems. 10 / 32 Article ______ contains the installation requirements for the wiring of television and radio receiving equipment, such as digital satellite receiving equipment for television signals and amateur/band radio equipment antennas. a. 810 b. 700 c. 680 d. 840 Incorrect. The correct answer is 810. NEC Article 810 covers the installation requirements for wiring television and radio receiving equipment, such as satellite dishes and radio antennas. Correct! NEC Article 810 governs the installation requirements for television and radio receiving equipment, including satellite receiving equipment and amateur radio antennas. NEC Article 810 provides the installation guidelines for television and radio receiving equipment, including satellite receiving equipment and antennas for amateur and broadcast radio systems. It ensures proper installation practices and electrical safety for these types of systems. Think about the term used to describe cables that are visible and run along the surface of ceilings and walls. 11 / 32 Communications cables installed ________ on the surface of ceilings and walls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. a. exposed b. concealed c. hidden d. a or b Incorrect. The correct answer is exposed. NEC Article 800.24 requires that exposed communications cables be properly supported to prevent damage. Correct! NEC Article 800.24 specifies that communications cables installed exposed on the surface of ceilings and walls must be properly supported by the building structure to prevent damage during normal building use. According to NEC Article 800.24, exposed communications cables installed on ceilings and walls must be properly supported to ensure they are not damaged during normal building activities. This prevents the cables from being accidentally pulled, crushed, or otherwise harmed. Consider the various requirements that must be met for the proper installation of these cable types in different types of communications raceways. 12 / 32 Class 2, Class 3, and Type PLTC cables shall be permitted to be installed in plenum communications raceways, riser communications raceways, and general-purpose communications raceways when _______ , where the requirements applicable to electrical nonmetallic tubing (ENT) apply. a. selected in accordance with the provisions of Table 800.154(b) b. installed in accordance with 800.113 and 362.24 through 362.56 c. all of these d. listed in accordance with 800.182 Incorrect. The correct answer is all of these. The installation of Class 2, Class 3, and Type PLTC cables in communications raceways must comply with all specified requirements in NEC Articles 800.154, 800.182, and installation guidelines. Correct! NEC Articles 800.154, 800.182, and the associated installation guidelines confirm that Class 2, Class 3, and Type PLTC cables may be installed in various communications raceways when they are selected, listed, and installed according to the required provisions, making the answer all of these. According to NEC Articles 800.154, 800.182, and installation practices outlined in 800.113 and 362.24 through 362.56, Class 2, Class 3, and Type PLTC cables can be installed in plenum, riser, and general-purpose communications raceways when they meet all specified requirements, including selection, listing, and installation practices where ENT requirements apply. 13 / 32 You must use bushings at the end of conduit drops for communications systems. a. False b. True The National Electrical Code (NEC) requires bushings at the end of conduit drops for communications systems according to Article 800.44(A). These bushings serve several key purposes: Protect Cables: Bushings prevent sharp edges of the conduit from damaging or cutting communication cables as they are pulled through. This is especially important for low-voltage data and communication cables that are more susceptible to tears and nicks. Maintain Separation: Bushings help maintain separation between communication cables and power cables within the same conduit. This reduces the risk of electrical interference from power lines affecting the signal quality of communication systems. Grounding Path: In some cases, metallic bushings can contribute to the overall grounding path for the communication system. Think about the standards and provisions that must be met for power-limited cables to ensure safety and compliance in different types of cable routing assemblies. 14 / 32 Power-limited fire alarm cables shall be selected in accordance with Table 800.154(c) permitted to be installed in plenum cable routing assemblies, riser cable routing assemblies, and general-purpose cable routing assemblies where __. a. selected in accordance with Table 800.154(c) b. installed in accordance with 800.110(C) and 800.113 c. all of these d. listed in accordance with the provisions of 800.182 Incorrect. The correct answer is all of these. NEC Articles 800.154, 800.182, and the installation provisions in 800.110 and 800.113 specify that power-limited fire alarm cables must meet all these criteria for installation in cable routing assemblies. Correct! NEC Articles 800.154, 800.182, and the associated installation guidelines confirm that power-limited fire alarm cables are permitted in various routing assemblies when they are selected, listed, and installed according to the specified provisions, making the answer all of these. According to NEC Articles 800.154, 800.182, 800.110(C), and 800.113, power-limited fire alarm cables can be installed in plenum, riser, and general-purpose cable routing assemblies if they are selected in accordance with Table 800.154(c), listed according to 800.182, and installed per the requirements of 800.110(C) and 800.113. Therefore, the correct answer is all of these. Think about the minimum allowable size for grounding conductors for antennas. 15 / 32 The grounding electrode conductor for an antenna mast or antenna discharge unit, if copper, shall not be smaller than 10 AWG. a. True b. False Incorrect. The correct answer is True. The grounding electrode conductor for an antenna mast or antenna discharge unit, if copper, must not be smaller than 10 AWG, as per NEC Article 810.21(H). Correct! NEC Article 810.21(H) requires that the grounding electrode conductor for an antenna mast or antenna discharge unit be no smaller than 10 AWG if copper is used, to ensure proper grounding and safety. According to NEC Article 810.21(H), the grounding electrode conductor for an antenna mast or antenna discharge unit must be at least 10 AWG if copper is used. This size ensures sufficient grounding protection for the system. 16 / 32 the size of the conduit should be trade size ____ or larger when installing for the communications system. a. 3/4 b. 3/8 c. 1 d. 3 The National Electrical Code (NEC) outlines requirements for electrical and communication systems. For communication systems, Article 800 covers installation procedures, including conduit selection and fill limitations. NEC Article 800.48 addresses conduit fill calculations. It specifies that the total cross-sectional area of the communication cables installed in a conduit must not exceed a certain percentage of the conduit's internal area. This ensures sufficient space for cable pulling, manipulation, and future additions. While the NEC doesn't prescribe a specific trade size for all communication system applications, it provides a framework for calculating the minimum required size. The appropriate size depends on the number and diameter of the communication cables planned for the installation. Think about the specific standards and provisions that apply to cable installation in different environments, particularly those related to fire alarm systems. 17 / 32 Power-limited fire alarm cables shall be permitted to be installed in plenum communications raceways, riser communications raceways, and general-purpose communications raceways where _____________, and where the requirements applicable to electrical nonmetallic tubing apply. a. installed in accordance with 800.113 and 362.24 through 362.56 b. selected in accordance with Table 800.154(b) c. all of these d. listed in accordance with the provisions of 800.182 Incorrect. The correct answer is all of these. NEC Articles 800.154, 800.182, and the installation requirements in 800.113 and 362.24 through 362.56 confirm that power-limited fire alarm cables must meet all these criteria for installation in communications raceways. Correct! NEC Articles 800.154, 800.182, and the associated installation guidelines confirm that power-limited fire alarm cables are permitted in various communications raceways when they are selected, listed, and installed according to the specified provisions, making the answer all of these. According to NEC Articles 800.154, 800.182, and 800.113, power-limited fire alarm cables can be installed in plenum communications raceways, riser communications raceways, and general-purpose communications raceways when they are selected according to Table 800.154(b), listed according to the provisions of 800.182, and installed as per 800.113 and 362.24 through 362.56. Therefore, the correct answer is all of these. Think about the conductor that must be bonded when the grounding or bonding conductor is installed in a metal raceway. 18 / 32 The bonding conductor or grounding electrode conductor for a radio/television antenna system shall be protected where subject to physical damage, and where installed in a metal raceway, both ends of the raceway shall be bonded to the _______ conductor. a. grounded b. contained c. b or c d. ungrounded Incorrect. The correct answer is contained. NEC Article 810.21 requires that both ends of a metal raceway containing the bonding or grounding electrode conductor for a radio/television antenna system be bonded to the contained conductor. Correct! NEC Article 810.21 specifies that when a bonding or grounding electrode conductor is installed in a metal raceway for a radio/television antenna system, both ends of the raceway must be bonded to the contained conductor for safety. According to NEC Article 810.21, when a bonding conductor or grounding electrode conductor for a radio/television antenna system is installed in a metal raceway, both ends of the raceway must be bonded to the contained conductor. This ensures that the metal raceway is properly grounded to the system for safety. Consider whether equipment connected to a communications network must meet specific safety standards. 19 / 32 Equipment intended to be permanently electrically connected to a communications network shall be listed. a. True b. False Incorrect. The correct answer is True. NEC Article 800.154 requires that equipment permanently connected to a communications network must be listed to ensure safety and compliance with standards. Correct! NEC Article 800.154 mandates that equipment intended to be permanently electrically connected to a communications network must be listed to ensure it meets the necessary safety and performance standards. According to NEC Article 800.154, equipment that is intended for permanent electrical connection to a communications network must be listed to ensure that it complies with safety standards and is suitable for its intended use. Listing verifies that the equipment meets the required safety and performance specifications. Think about the method used to maintain the fire-resistance rating when cables and raceways penetrate fire-resistant assemblies. 20 / 32 Openings around penetrations of CATV communications raceways through fire-resistant-rated walls, partitions, floors, or ceilings shall be ______ using approved methods to maintain the fire-resistance rating. a. closed b. firestopped c. opened d. draft stopped Incorrect. The correct answer is firestopped. NEC Article 820.26 requires that penetrations in fire-resistant-rated assemblies be firestopped to maintain the structure’s fire-resistance rating. Correct! NEC Article 820.26 mandates that openings around penetrations of CATV communications raceways through fire-resistant-rated assemblies be firestopped using approved methods to maintain the fire-resistance rating. According to NEC Article 820.26, openings around CATV communications raceways that penetrate fire-resistant-rated walls, floors, or ceilings must be firestopped using approved methods to ensure that the fire-resistance rating of the structure is maintained. 21 / 32 Where in the code book can you find details on communications systems a. Article 220 b. Article 800 c. Article 600 d. Article 350 Chapter 8 of the NEC focuses on communications systems. Article 800 serves as the foundation for this chapter, establishing general requirements that apply to various communication types, including: Telephone lines Communication circuits Community antenna television (CATV) and radio distribution systems Network-powered broadband communications systems Premises-powered broadband communications systems Articles 805, 820, 830, and 840 might supersede specific requirements outlined in Article 800 for their respective systems. Consider where the transition from outside to inside occurs for communications cabling. 22 / 32 The point of entrance of a communications circuit is the point ______ at which the communications wire or cable emerges from an external wall or from a concrete floor slab. a. on the building b. within a building c. none of these d. outside a building Incorrect. The correct answer is Within a building. NEC Article 800.2 specifies that the point of entrance for communications circuits is where the cable emerges within a building. Correct! NEC Article 800.2 states that the point of entrance of a communications circuit is the point within a building where the wire or cable emerges from an external wall or concrete floor slab. According to NEC Article 800.2, the point of entrance for a communications circuit is defined as the point within a building where the communications wire or cable exits an external wall or comes up through a concrete floor slab. Think about the method used to maintain the fire-resistance rating when cables penetrate fire-resistant structures. 23 / 32 Openings around penetrations of communications cables, communications raceways, and cable routing assemblies through fire-resistant-rated walls, partitions, floors, or ceilings shall be ______ using approved methods to maintain the fire-resistance rating. a. firestopped b. draft stopped c. closed d. opened Incorrect. The correct answer is firestopped. NEC Article 800.26 requires that openings around penetrations of communications cables and raceways through fire-resistant structures be firestopped to maintain the fire-resistance rating. Correct! NEC Article 800.26 specifies that openings around penetrations of communications cables and raceways through fire-resistant-rated structures must be firestopped using approved methods to maintain the fire-resistance rating. According to NEC Article 800.26, any openings created by communications cables, raceways, or cable routing assemblies that penetrate fire-resistant-rated structures must be firestopped using approved methods to maintain the integrity of the fire-resistance rating and prevent the spread of fire. Think about the maximum allowable length of the bonding or equipment grounding conductor before requiring a separate grounding electrode for CATV systems. 24 / 32 In one- and two-family dwellings where it is not practicable to achieve an overall maximum bonding conductor or equipment grounding conductor length of _____ ft for CATV, a separate grounding electrode as specified in 250.52(A)(5), (A)(6), or (A)(7) shall be used. a. 8 b. 20 c. 10 d. 5 Incorrect. The correct answer is 20 feet. NEC Article 820.100(D) specifies that if the length of the bonding conductor or equipment grounding conductor exceeds 20 feet, a separate grounding electrode is required for CATV systems. Correct! NEC Article 820.100(D) states that if the bonding or equipment grounding conductor for CATV systems exceeds 20 feet, a separate grounding electrode must be used to ensure safety. According to NEC Article 820.100(D), if the bonding conductor or equipment grounding conductor for CATV systems in one- and two-family dwellings cannot be kept at a maximum length of 20 feet, a separate grounding electrode must be used to ensure proper grounding. Think about whether proper hardware is required for securing exposed CATV cables and whether damage to the cables must be avoided. 25 / 32 Exposed CATV cables shall be secured by hardware such as straps, staples, cable ties, hangers, or similar fittings designed and installed so as not to damage the cables. a. True b. False Incorrect. The correct answer is True. NEC Article 820.24 specifies that exposed CATV cables must be secured using appropriate hardware, such as straps or staples, without causing damage to the cables. Correct! NEC Article 820.24 requires that exposed CATV cables be secured with straps, staples, cable ties, or hangers that are designed and installed in a way that does not damage the cables. According to NEC Article 820.24, exposed CATV cables must be properly secured using hardware such as straps, staples, hangers, cable ties, or similar fittings. These fittings must be installed carefully to prevent any damage to the cables, ensuring the integrity of the system. Consider the minimum wire size required for bonding communications and power grounding systems. 26 / 32 Communications grounding electrodes shall be bonded to the power grounding electrode system at the building or structure served using a minimum _____ AWG copper bonding jumper. a. 6 b. 4 c. 8 d. 10 Incorrect. The correct answer is 6 AWG. As per NEC Article 800.100(D), a minimum of 6 AWG copper bonding jumper is required to bond the communications grounding electrode to the power grounding electrode system. Correct! NEC Article 800.100(D) requires that a 6 AWG copper bonding jumper be used to bond the communications grounding electrode to the power grounding electrode system for safe and effective grounding. According to NEC Article 800.100(D), the communications grounding electrode must be bonded to the power grounding electrode system using a minimum 6 AWG copper bonding jumper. This provides a secure connection to maintain electrical safety and proper grounding. Think about the installation condition where the cable is visible and exposed to potential damage. 27 / 32 CATV coaxial cables installed ________ on the surface of ceilings and walls shall be supported by the building structure in such a manner that the cables will not be damaged by normal building use. a. hidden b. a and b c. concealed d. exposed Incorrect. The correct answer is exposed. NEC Article 820.24 requires that exposed CATV coaxial cables be supported properly to prevent damage. Correct! NEC Article 820.24 specifies that exposed CATV coaxial cables installed on ceilings and walls must be supported by the building structure to prevent damage during normal building use. According to NEC Article 820.24, exposed CATV coaxial cables must be properly supported by the building structure to ensure that they are not damaged during normal building use. This helps protect the cables from being pulled, crushed, or otherwise compromised. Think about whether a physical separation can allow different wiring systems to share the same enclosure. 28 / 32 Indoor antenna lead-in conductors for radio and television receiving equipment can be in the same enclosure with conductors of other wiring systems where separated by an effective permanently installed barrier. a. False b. True Incorrect. The correct answer is True. NEC Article 820.133(A)(1) allows antenna lead-in conductors to share the same enclosure with other wiring systems if separated by an effective and permanently installed barrier. Correct! NEC Article 820.133(A)(1) allows indoor antenna lead-in conductors to be in the same enclosure with other wiring systems if separated by a permanent barrier, ensuring safety and preventing interference. According to NEC Article 820.133(A)(1), antenna lead-in conductors can occupy the same enclosure with other wiring systems if an effective and permanent barrier is installed to ensure electrical separation, preventing potential interference or safety issues. Consider the multiple requirements that must be met for proper installation of these cable types in different routing assemblies. 29 / 32 Class 2, Class 3, and Type PLTC cables shall be permitted to be installed in plenum cable routing assemblies, riser cable routing assemblies, and general purpose cable routing assemblies when _______. a. installed in accordance with 800.110 C and 800.113 b. all of these c. listed in accordance with the provisions of 800.182 d. selected in accordance with Table 800.154(c) Incorrect. The correct answer is all of these. The installation of Class 2, Class 3, and Type PLTC cables in routing assemblies must comply with all specified requirements in NEC Articles 800.154, 800.182, and installation guidelines. Correct! NEC Articles 800.154, 800.182, and installation guidelines confirm that Class 2, Class 3, and Type PLTC cables may be installed in various routing assemblies when they are selected, listed, and installed according to the required provisions, making the answer all of these. According to NEC Articles 800.154, 800.182, and installation practices outlined in 800.110 C and 800.113, Class 2, Class 3, and Type PLTC cables can be installed in plenum, riser, and general purpose cable routing assemblies when they meet all specified requirements, including selection, listing, and installation practices. Consider what must be done to protect the metallic sheath of communications cables when they enter a building. 30 / 32 In installations where the communications cable enters a building, the metallic sheath members of the cable shall be _________ as close as practicable to the point of entrance. a. a or b b. a and b c. interrupted by an insulating joint or equivalent device d. grounded as specified in 800.100 Incorrect. The correct answer is a or b. NEC Article 800.93 specifies that the metallic sheath of communications cables entering a building must be either grounded or interrupted by an insulating joint to ensure safety. Correct! NEC Article 800.93 states that the metallic sheath of communications cables entering a building must be either grounded or interrupted by an insulating joint as close as possible to the point of entrance to ensure electrical safety. According to NEC Article 800.93, the metallic sheath of communications cables must either be grounded per NEC Article 800.100 or interrupted by an insulating joint as close to the point of entrance as possible. This requirement ensures electrical safety by preventing potential hazards from lightning or other electrical events. Think about the appropriate point of connection for bonding conductors when an intersystem bonding termination exists. 31 / 32 If the building or structure served has an intersystem bonding termination, the bonding conductor for an antenna mast shall be connected to the intersystem bonding termination. a. True b. False Incorrect. The correct answer is True. NEC Article 810.21(F) requires the bonding conductor for an antenna mast to be connected to the intersystem bonding termination if it is available. Correct! NEC Article 810.21(F) specifies that if a building has an intersystem bonding termination, the bonding conductor for the antenna mast must be connected to it, ensuring a unified and safe grounding system. According to NEC Article 810.21(F), if there is an intersystem bonding termination at the building or structure, the bonding conductor for an antenna mast must be connected to this termination. This helps maintain a common grounding system for all electrical and communications systems, ensuring safety and compliance with the NEC. Consider what needs to be done to protect the grounding conductor from physical harm when it is exposed. 32 / 32 The grounding electrode conductor for an antenna mast shall be _______ where subject to physical damage. a. connected b. electrically protected c. disconnected d. protected Incorrect. The correct answer is protected. The grounding electrode conductor must be protected from physical damage, as required by NEC Article 810.21(F). Correct! NEC Article 810.21(F) requires that the grounding electrode conductor for an antenna mast be protected where it is subject to physical damage to maintain the safety and effectiveness of the grounding system. According to NEC Article 810.21(F), the grounding electrode conductor for an antenna mast must be protected if it is exposed to potential physical damage. Proper protection ensures the integrity of the grounding system and prevents electrical hazards. 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
