eep April 7, 2025 NEC 300-399 NEC Quizzes Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% Article 300-399 Part05 This comprehensive quiz contains 50 questions carefully selected from the National Electrical Code (NEC) Articles spanning 300 through 399. This section of the NEC addresses crucial aspects of wiring methods, materials, and general requirements for electrical installations within this portion 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. Physical damage and corrosion are key considerations for prohibitions. 1 / 50 In what conditions is Type MC cable prohibited (330.12)? a. When used in underground applications. b. When directly buried without a jacket. c. When subject to physical damage or corrosive conditions without proper protection. d. When installed in cable trays. Incorrect. The NEC prohibits use in these specific hazardous conditions. Correct! Type MC cable is prohibited without protection in these conditions. Type MC cable cannot be used in areas exposed to physical damage or corrosive conditions unless properly protected to withstand such environments. Thermal insulation affects cable heat dissipation. 2 / 50 What must be done when Type MC cable is installed in thermal insulation (330.80(C))? a. Only shielded cables may be used. b. The installation must include a dedicated cooling system. c. The ampacity must be adjusted in accordance with Table 310.15(C)(1). d. No adjustments are necessary. Incorrect. Ampacity adjustment is mandatory in such installations. Correct! Ampacity must be adjusted for installations in thermal insulation. Ampacity must be adjusted using Table 310.15(C)(1) when Type MC cable is installed in thermal insulation, as the insulation impacts heat dissipation. The sheath is designed for demanding environmental conditions. 3 / 50 What material must the outer sheath of Type NMC cable resist (334.116(B))? a. Fire and mechanical impact. b. Moisture, fungus, and corrosion. c. Acids and alkalis only. d. Ultraviolet light. Incorrect. Type NMC cable must resist moisture, fungus, and corrosion. Correct! The sheath is designed to resist these elements. The outer sheath of Type NMC cable must be flame-retardant, moisture-resistant, fungus-resistant, and corrosion-resistant to handle various environments. Type NM cable is not designed for exposure to moisture. 4 / 50 Where is the use of Type NM cable prohibited (334.12(B))? a. In residential buildings. b. In Type V construction. c. In wood-frame buildings. d. In wet or damp locations. Incorrect. Type NM cable is specifically prohibited in wet or damp locations. Correct! Type NM cable is not permitted in wet or damp locations. Type NM cable cannot be used in wet or damp locations because it is not designed to handle moisture. Type MI cable is versatile in its application environments. 5 / 50 Where is the use of Type MI cable permitted (332.10)? a. In hazardous locations only. b. Only in dry locations. c. Only for outdoor installations. d. In dry, wet, or continuously moist locations. Incorrect. Type MI cable is versatile and usable in multiple environmental conditions. Correct! Type MI cable can be used in dry, wet, or continuously moist locations. Type MI cable is permitted in dry, wet, and continuously moist locations, making it suitable for various conditions. The bending radius ensures the cable’s integrity. 6 / 50 What is the required bending radius for Type NM and NMC cables (334.24)? a. No specific bending radius is required. b. Five times the cable diameter. c. Ten times the cable diameter. d. Three times the cable diameter. Incorrect. The correct minimum bending radius is five times the cable diameter. Correct! The bending radius is five times the cable diameter. The radius of the curve of the inner edge of any bend in Type NM or NMC cable must be at least five times the diameter of the cable to prevent damage. Protection is necessary to prevent damage during installation. 7 / 50 What is required when Type MI cable is installed through or parallel to framing members (332.17)? a. Must be protected with plastic conduit. b. Must always be installed in a cable tray. c. No special requirements apply. d. Must be protected according to 300.4 to prevent physical damage. Incorrect. Protection according to 300.4 is required for these installations. Correct! Type MI cable must follow 300.4 protections Type MI cable must comply with the protective measures outlined in 300.4 when installed through or parallel to framing members to prevent physical damage. Marking ensures compliance with general conductor identification requirements. 8 / 50 What marking is required for Type ITC cable (335.7)? a. Voltage ratings must be clearly marked. b. Marking must comply with 310.8(A)(2) through (A)(5). c. The cable must be labeled for both voltage and current capacity. d. Marking is not required for this cable type. Incorrect. Type ITC cable marking must comply with specific NEC requirements. Correct! Marking complies with NEC 310.8(A)(2) through (A)(5). Marking ensures compliance with general conductor identification requirements. Moisture exposure is a key restriction for Type FC cable. 9 / 50 Where is the use of Type FC cable prohibited (322.12)? a. In concealed spaces. b. In residential applications. c. In wet or damp locations unless identified for the use. d. In installations above 30 amperes. Incorrect. Type FC cable is prohibited in wet or damp locations unless rated for those conditions. Correct! Type FC cable is not allowed in wet or damp locations unless rated for it. Type FC cable cannot be used in wet or damp locations unless it is explicitly identified and rated for such use. Heat dissipation in thermal insulation affects ampacity ratings. 10 / 50 What is the ampacity rating adjustment for Type AC cable installed in thermal insulation (320.80(A))? a. Ampacity can be increased by 25% with proper spacing. b. Ampacity must not exceed the rating of a 60°C conductor. c. No adjustment is necessary. d. Insulation type determines if adjustment is needed. Incorrect. Ampacity is limited to 60°C ratings in thermal insulation. Correct! The ampacity must align with 60°C conductor ratings in thermal insulation. The ampacity of Type AC cable installed in thermal insulation must not exceed that of a 60°C conductor, even if the conductor itself is rated for 90°C. Grounded conductor identification aligns with general NEC standards. 11 / 50 How must grounded conductors in Type FC cable be identified (322.120(B))? a. No specific identification is required. b. By black or red markings. c. By blue or green markings. d. By white or gray markings throughout its length. Incorrect. Grounded conductors must be identified with white or gray markings. Correct! Grounded conductors are identified by white or gray markings. Grounded conductors in Type FC cable must be identified with durable white or gray markings along their entire length. The floor surface must be consistent to support FCC installations 12 / 50 What is the minimum floor surface requirement for Type FCC cable installations (324.10(C))? a. Floors with mild imperfections or gaps. b. Surfaces made of resilient carpet backing. c. Smooth and continuous wood surfaces only. d. Hard, sound, smooth, continuous surfaces such as concrete, ceramic, or wood. Incorrect. FCC systems require smooth and continuous floor surfaces for proper adherence. Correct! Hard, smooth, and continuous surfaces are necessary for FCC installations. Type FCC cable requires a hard, sound, smooth, and continuous floor surface, such as concrete or wood, to ensure proper installation and operation. Protection depends on accessibility and height from the floor. 13 / 50 What is required for Type AC cable installations in accessible attics (320.23)? a. Guard strips or running boards if within 7 feet of the floor. b. No special protection if cables are above ceiling joists. c. Protection with guard strips within 10 feet of an attic entrance. d. Full conduit enclosure for all attic installations. Incorrect. Guard strips are mandatory when cables are within 7 feet of the floor. Correct! Guard strips protect cables within 7 feet of the floor in attics. Guard strips or running boards are required if the cable is within 7 feet of the floor in an accessible attic. Type IGS cable is designed for medium- to large-scale electrical systems. 14 / 50 What is the minimum conductor size for Type IGS cable (326.104)? a. 250 kcmil. b. 500 kcmil. c. 4750 kcmil. d. 100 kcmil. Incorrect. The minimum conductor size for Type IGS cable is 250 kcmil. Correct! The minimum conductor size for Type IGS cable is 250 kcmil. The minimum conductor size for Type IGS cable is 250 kcmil to handle the required electrical loads safely. Type NM cable is limited to specific environmental conditions. 15 / 50 Where is Type NM cable permitted to be installed (334.10(A))? a. Only in unfinished basements. b. Only in dry locations. c. For both exposed and concealed work in normally dry locations. d. In wet or corrosive locations. Incorrect. Type NM cable is restricted to dry locations. Correct! Type NM cable is suitable for dry locations in exposed and concealed installations. Type NM cable can be used for both exposed and concealed installations but only in normally dry locations to ensure its integrity. The integrity of the cable must be maintained during bending. 16 / 50 How must bends in Type ITC cable be made (335.10)? a. With no regard for the cable structure. b. Bends are not permitted for this cable type. c. With a minimum radius of 10 times the cable diameter. d. To prevent damage to the cable. Incorrect. Bends must not compromise the integrity of the cable. Correct! Bends must be made to prevent cable damage. Bends in Type ITC cable must be made carefully to avoid damaging the cable, ensuring it remains functional and safe. Multiple metallic materials are permitted for the sheath. 17 / 50 What materials are permitted for the sheath of Type MC cable (330.116)? a. Only aluminum. b. Only steel or copper. c. Smooth, corrugated, or interlocked metal sheaths of aluminum, copper, or steel. d. Nonmetallic materials are also allowed. Incorrect. The sheath may use several metallic materials and designs. Correct! These materials and designs are specified for Type MC cable. The sheath of Type MC cable can be made of aluminum, copper, or steel in smooth, corrugated, or interlocked designs, providing flexibility in applications. Type MC cable has wide usage flexibility. 18 / 50 Where is Type MC cable permitted to be installed (330.10)? a. In both exposed and concealed installations, including wet locations with appropriate protection. b. Only in dry locations. c. Only in hazardous locations. d. Only in exposed installations. Incorrect. Type MC cable is permitted in a variety of locations when appropriately protected. Correct! Type MC cable is highly versatile in its applications. Type MC cable can be used in exposed, concealed, and wet locations when proper corrosion-resistant protection is provided. Type FC cable is limited to specific current ratings. 19 / 50 What is the maximum branch circuit rating for Type FC cable as per 322.10(1)? a. 20 amperes. b. 30 amperes. c. 25 amperes. d. 40 amperes. Incorrect. The maximum branch circuit rating is 30 amperes. Correct! The branch circuit rating for Type FC cable is 30 amperes. Type FC cable is permitted for use in branch circuits rated at no more than 30 amperes to ensure safety and compliance. Not all sheath types qualify as a grounding conductor. 20 / 50 What is the requirement for the equipment grounding conductor in Type MC cable (330.108)? a. A separate grounding wire is required regardless of sheath type. b. The grounding conductor must comply with 250.118 and cannot rely on the sheath alone. c. Grounding is not required for Type MC cable. d. The metallic sheath can always be used as the grounding conductor. Incorrect. The sheath alone cannot always be used as a grounding conductor. Correct! The grounding conductor must meet NEC standards and cannot rely solely on the sheath. The equipment grounding conductor must comply with 250.118, and the sheath alone does not always qualify unless specifically designed and listed as such. General-purpose and appliance circuits have a lower rating than individual branch circuits. 21 / 50 What is the maximum branch circuit rating for general-purpose and appliance branch circuits using Type FCC cable (324.10(B)(2))? a. 25 amperes. b. 30 amperes. c. 20 amperes. d. 15 amperes. Incorrect. The correct maximum rating for these branch circuits is 20 amperes. Correct! The rating for general-purpose and appliance branch circuits is 20 amperes. The maximum rating for general-purpose and appliance branch circuits using Type FCC cable is 20 amperes. This gas provides insulation and electrical performance enhancements. 22 / 50 What gas is used to pressurize Type IGS cable conduits (326.112)? a. Sulfur hexafluoride (SF6) gas. b. Argon c. Nitrogen gas. d. Compressed air. Incorrect. SF6 gas is used for its superior insulation capabilities. Correct! SF6 gas is used to pressurize Type IGS cable conduits. Sulfur hexafluoride (SF6) gas is used to pressurize Type IGS cable conduits because of its excellent insulating properties. Protection is needed for installations subject to potential damage. 23 / 50 What is required for Type NMC cable installed in masonry or concrete walls (334.10(B))? a. Protected against nails or screws by a steel plate at least 1.59 mm thick. b. Must be encased in metal conduit. c. Only installed horizontally. d. No additional protection is required. Incorrect. A steel plate is required to protect the cable from damage. Correct! A steel plate provides necessary protection. Type NMC cable must be protected by a steel plate to avoid damage from nails or screws when installed in masonry or concrete walls. Adjustments account for heat buildup in insulation. 24 / 50 What ampacity correction is required for more than two NM cables in thermal insulation (334.80)? a. No correction is needed for NM cables in insulation. b. Ampacity can be increased by 10%. c. Only cables over 12 AWG need adjustment. d. Ampacity must be adjusted according to Table 310.15(C)(1). Incorrect. Ampacity adjustments are mandatory for NM cables in thermal insulation. Correct! Table 310.15(C)(1) specifies the required adjustments. When more than two NM cables are installed in thermal insulation, ampacity adjustments per Table 310.15(C)(1) are required to prevent overheating. Support intervals ensure the cable remains secure. 25 / 50 What is the maximum allowable support interval for Type NM cable (334.30)? a. 12 inches. b. 4 1/2 feet. c. 3 feet. d. 6 feet. Incorrect. The maximum support interval is 4 1/2 feet. Correct! The maximum allowable interval is 4 1/2 feet. Type NM cable must be supported at intervals not exceeding 4 1/2 feet to maintain proper installation. Standard Type MC cable handles low- to medium-voltage systems. 26 / 50 What is the voltage rating for standard Type MC cable (330.1)? a. 2400 volts. b. 35,000 volts. c. 1000 volts. d. 2000 volts. Incorrect. Standard Type MC cable is rated up to 2000 volts. Correct! Type MC cable is rated for systems up to 2000 volts. Type MC cable is rated for systems up to 2000 volts, while higher ratings are classified under specific types. Proper sealing is essential to prevent moisture ingress. 27 / 50 What must be used to seal the ends of Type MI cable (332.40(B))? a. End seal fittings identified for the purpose. b. Standard plastic caps. c. Electrical tape. d. Heat-shrink tubing. Incorrect. End seal fittings specifically designed for Type MI cable must be used. Correct! End seal fittings are mandatory to protect against moisture. End seal fittings are required to prevent moisture from entering the insulation and ensure the integrity of the cable. The bending radius is proportional to the cable diameter. 28 / 50 What is the minimum bending radius for Type MI cable with an external diameter of 19 mm (3/4 inch) or less (332.24)? a. Seven times the external diameter. b. Five times the external diameter of the metallic sheath. c. Ten times the external diameter. d. No bending radius limit is specified. Incorrect. The minimum radius is five times the sheath diameter for cables up to 19 mm. Correct! The bending radius is five times the diameter for these cables. For cables with an external diameter of 19 mm (3/4 inch) or less, the minimum bending radius is five times the sheath’s diameter to prevent damage. Type ITC cable is versatile but used primarily in industrial environments. 29 / 50 Where is the use of Type ITC cable permitted (335.4)? a. Only in dry locations. b. Only in hazardous locations. c. In residential buildings. d. In cable trays, raceways, or as direct buried where identified for the use. Incorrect. Type ITC cable has specific approved environments for installation. Correct! Cable trays, raceways, and identified buried applications are permitted. Type ITC cable can be installed in cable trays, raceways, or direct buried when properly identified, making it ideal for industrial setups. Different sheaths have specific bending requirements. 30 / 50 What is the minimum bending radius for Type MC cable with interlocked armor (330.24(B))? a. Twelve times the cable diameter. b. Ten times the cable diameter. c. Seven times the cable diameter. d. Five times the cable diameter. Incorrect. The bending radius for interlocked armor is seven times the diameter. Correct! The minimum radius for interlocked armor is seven times the cable diameter For interlocked armor or corrugated sheath, the minimum bending radius is seven times the cable diameter to avoid damage. Accessibility affects protection requirements. 31 / 50 How must Type MC cable be installed in accessible attics (330.23)? a. Cannot be installed in attics. b. Must be enclosed in conduit. c. Protected by guard strips if within 7 feet of the floor. d. Installed with no restrictions. Incorrect. Guard strips are required for cable within 7 feet of the floor. Correct! Guard strips ensure protection in accessible attics. When installed in accessible attics, Type MC cable must be protected by guard strips if it is within 7 feet of the floor or joists to prevent physical damage Type IGS cable is primarily used in specific outdoor and underground applications. 32 / 50 Where is the use of Type IGS cable not permitted (326.12)? a. For branch circuits. b. For service conductors. c. Underground installations. d. As interior wiring or in contact with buildings. Incorrect. Type IGS cable is prohibited for interior wiring or in contact with buildings. Correct! Type IGS cable is not allowed as interior wiring or in contact with buildings. Type IGS cable cannot be used as interior wiring or in direct contact with buildings to avoid structural and safety issues. Type ITC cable is specifically designed for low-voltage control circuits. 33 / 50 What is the maximum voltage rating for Type ITC cable (335.1)? a. 600 volts. b. 300 volts. c. 150 volts. d. 120 volts. Incorrect. The maximum voltage rating for Type ITC cable is 150 volts. Correct! Type ITC cable is rated for a maximum of 150 volts. Type ITC cable is limited to circuits operating at 150 volts or less to ensure safety in instrumentation applications. Proper sealing ensures safety and prevents moisture ingress 34 / 50 How must Type FCC cable ends be treated during installation (324.40(A))? a. Insulated and sealed against dampness and liquid spillage using listed insulating ends. b. Left open for future connections. c. Covered with a plastic cap. d. Sealed with tape or glue. Incorrect. Insulating and sealing cable ends with listed materials is mandatory. Correct! Insulated ends are required for protection. Type FCC cable ends must be insulated and sealed with listed insulating ends to protect against dampness and liquid spillage. Markings provide identification for the cable. 35 / 50 What type of markings must Type AC cable have (320.120)? a. Installation date and inspector’s approval. b. Manufacturer identification through external markings. c. Voltage and temperature ratings only. d. Conductor material and ampacity. Incorrect. Manufacturer identification is required on the cable armor. Correct! External markings identify the manufacturer. Type AC cable must have distinctive external markings to indicate the manufacturer for the entire cable length. NEC guidelines specify protection for cables near framing members. 36 / 50 How must cables run through or parallel to framing members be protected (320.17)? a. With flexible conduit. b. In compliance with 300.4 to prevent physical damage. c. No additional protection is needed. d. With a plastic sleeve. Incorrect. Protection is required to prevent physical damage. Correct! Protection must comply with 300.4 for framing member installations. Type AC cable must comply with 300.4 to ensure it is protected when run through or parallel to framing members. The sheath is designed for durability and environmental protection. 37 / 50 What materials are used for the outer sheath of Type MI cable (332.116)? a. Zinc-coated steel. b. Aluminum or plastic. c. Copper or alloy steel (e.g., stainless steel). d. Galvanized aluminum. Incorrect. The outer sheath materials are copper or alloy steel for durability. Correct! Copper and alloy steel are the materials used for Type MI cable sheaths. The outer sheath of Type MI cable is made of copper or alloy steel to provide mechanical protection and a moisture seal. Both securing and supporting have specific requirements. 38 / 50 How must Type AC cable be secured and supported (320.30)? a. Secured within 12 inches of every box and supported at intervals not exceeding 4 1/2 feet. b. No securing is required for concealed installations. c. Supported every 12 inches. d. Secured every 6 feet. Incorrect. Both securing and supporting intervals must be followed. Correct! Securing and supporting are mandatory at these intervals. Type AC cable must be secured within 12 inches of boxes and supported at intervals of no more than 4 1/2 feet. Total bend angles ensure the cable’s structural and operational integrity. 39 / 50 What is the maximum total bend angle allowed for a run of Type IGS cable (326.26)? a. No limit is specified. b. 270 degrees. c. 180 degrees. d. 360 degrees. Incorrect. The maximum allowed total bend angle is 360 degrees. Correct! Type IGS cable runs are limited to 360 degrees of total bends. Type IGS cable runs must not exceed a total bend angle of 360 degrees, including bends at pull boxes or terminations, to maintain integrity. Bending radius depends on the conduit size to prevent damage. 40 / 50 What is the minimum bending radius for a 3-inch conduit used with Type IGS cable (326.24, Table 326.24)? a. 1150 mm (45 inches). b. 600 mm (24 inches). c. 900 mm (35 inches). d. 450 mm (18 inches). Incorrect. The minimum bending radius for a 3-inch conduit is 900 mm (35 inches). Correct! The bending radius for a 3-inch conduit is 900 mm (35 inches). For a 3-inch conduit, the minimum bending radius is 900 mm (35 inches) to ensure safe installation without damaging the cable. Restrictions are based on environmental and physical conditions. 41 / 50 In what locations is the use of Type AC cable prohibited (320.12)? a. In all outdoor installations. b. In wet or damp locations, or where subject to physical damage. c. In residential applications. d. In concealed spaces only. Incorrect. Type AC cable is prohibited in wet, damp, or physically damaging environments. Correct! Wet, damp, and physically damaging locations are unsuitable for Type AC cable. Type AC cable is not allowed in damp or wet locations, areas exposed to corrosive conditions, or where it is subject to physical damage. Type FCC systems are not suitable for environments with moisture or hazardous conditions. 42 / 50 Where is the use of Type FCC cable prohibited (324.12)? a. In concealed locations. b. Outdoors, in wet locations, or hazardous areas. c. On surfaces exposed to direct sunlight. d. In administrative office areas. Incorrect. These conditions are explicitly prohibited for Type FCC cable installations. Correct! Type FCC cable is not permitted in these locations Type FCC cable cannot be used outdoors, in wet or hazardous locations, or areas exposed to corrosive vapors, as these conditions can compromise safety. Induced currents are a key consideration for single conductors. 43 / 50 What is required for single-conductor Type MC cable installations (330.31)? a. Can only be installed in dry locations. b. Nonferrous armor or sheath must be used to minimize induced currents. c. Must always be installed in conduit. d. Must be grouped in pairs for all phases. Incorrect. Nonferrous armor or sheath is necessary to handle magnetic effects. Correct! Nonferrous armor minimizes induced currents in single-conductor installations. Single-conductor Type MC cable installations require nonferrous armor or sheath to minimize induced currents caused by magnetic fields. Type ITC cable is specifically designed for low-voltage control circuits. 44 / 50 What is the maximum voltage rating for Type ITC cable (335.1)? a. 120 volts. b. 150 volts. c. 300 volts. d. 600 volts. Incorrect. The maximum voltage rating for Type ITC cable is 150 volts. Correct! Type ITC cable is rated for a maximum of 150 volts. Type ITC cable is limited to circuits operating at 150 volts or less to ensure safety in instrumentation applications. Securing and supporting intervals are explicitly stated. 45 / 50 How must Type MC cable be supported and secured (330.30)? a. No securing is required for concealed installations. b. Supported every 3 feet regardless of location. c. Secured within 12 inches of every box and supported at intervals not exceeding 6 feet. d. Secured every 8 feet with no proximity requirement for boxes. Incorrect. Securing and supporting intervals are clearly defined in the NEC. Correct! These securing and supporting requirements ensure proper installation. Type MC cable must be secured within 12 inches of boxes and supported at intervals not exceeding 6 feet to ensure stability. Type FCC systems use dual shielding for safety and performance. 46 / 50 What is required for shielding in Type FCC systems (324.40(C))? a. A single shield that connects to the ground. b. Both top and bottom shields for all floor-mounted Type FCC cables. c. No shielding is required if the cables are under 20 amperes. d. Only a top shield for floor-mounted cables. Incorrect. Both top and bottom shields are mandatory for these systems. Correct! Top and bottom shields are required for safety. Both top and bottom shields are required for all floor-mounted Type FCC cable installations to ensure protection and grounding integrity. Protection is necessary to prevent physical damage in accessible areas. 47 / 50 Where must flat cable assemblies be protected when installed below 8 feet above the floor (322.10(3))? a. By enclosing them in PVC conduit. b. No protection is required. c. By painting them with a protective coating. d. With a cover identified for the use. Incorrect. Cables below 8 feet require specific protection. Correct! Covers are required for installations below 8 feet. Flat cable assemblies must be protected with a cover identified for the use when installed below 8 feet to prevent physical damage. Smaller conductors have lower ampacity ratings. 48 / 50 What is the maximum ampacity for 22 AWG conductors in Type ITC cable (335.8)? a. No limit specified. b. 10 amperes. c. 5 amperes. d. 3 amperes. Incorrect. The ampacity for 22 AWG conductors is limited to 3 amperes. Correct! The ampacity for 22 AWG conductors is 3 amperes. For 22 AWG conductors, the maximum ampacity is 3 amperes, while other sizes in Type ITC cable are limited to 5 amperes. Terminations must prevent damage to the conductors. 49 / 50 What is required at the termination points of Type AC cable to protect against abrasion (320.40)? a. Tape wrapping the conductors. b. A grounding clip. c. An insulating bushing or equivalent. d. No special protection is required. Incorrect. Insulating bushings are required to prevent abrasion. Correct! Insulating bushings or equivalent protection is mandatory at terminations. An insulating bushing or its equivalent must be provided at termination points to protect against abrasion. Special devices are required for proper termination. 50 / 50 What must be used to terminate flat cable assemblies at dead ends (322.40(A))? a. A clamp connector. b. Heat-shrink tubing. c. A standard junction box. d. An end-cap device identified for the use. Incorrect. Dead-end terminations require an identified end-cap device. Correct! An end-cap device is required for dead-end terminations. Dead ends of flat cable assemblies must be terminated using an end-cap device that is specifically identified for the application. 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