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 Part04 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. Environmental impacts typically involve more severe or specific conditions. 1 / 50 Which of the following is NOT a concern for environmental impact on EVSE maintenance? a. Dusty conditions require regular EVSE cleanings b. Salt water may lead to corrosion c. Rain may lead to external damage to the equipment d. Pests may damage EVSE equipment Incorrect. This concern is not typically valid. Correct! EVSEs are built to withstand rain exposure. Rain is accounted for in EVSE designs and does not typically lead to damage. Always ensure safety by removing power to the equipment before working. 2 / 50 What is the necessary step before working on an EVSE station? a. Grounding b. Energizing c. De-energizing d. Lifting Incorrect. De-energizing is the essential safety step. Correct! De-energizing ensures the EVSE is safe to work on. De-energizing prevents accidental electric shock or equipment damage during maintenance. Safety protocols require de-energizing equipment first. 3 / 50 What action should be taken FIRST when replacing an EVSE cable? a. Shut down the station before operating on it b. Locate the existing cabling system and its relevant attachments c. Carefully remove the existing cabling system while preserving any necessary screws or materials d. Identify where the “new” cabling system will be connected Incorrect. Safety should always be the first priority. Correct! Shutting down ensures safe handling of the cable replacement. Shutting down the station ensures technician safety and prevents electrical hazards. Lockout/tagout is a safety measure for preventing accidental energization. 4 / 50 Which of the following does NOT describe lockout/tagout for an EVSE? a. It involves disconnecting power sources and locking them in the off position b. It ensures that electrical maintenance or repair work can be performed safely c. It involves tagging equipment with warning labels to indicate it should not be operated d. It is primarily used for securing vehicles during charging Incorrect. Lockout/tagout doesn’t involve vehicle security. Correct! Lockout/tagout is not used for securing vehicles. Lockout/tagout focuses on safety during electrical maintenance, not securing vehicles. Ground faults are one of the leading causes of electrical hazards. 5 / 50 Which of the following best defines a ground fault? a. A condition where current unintentionally flows to the ground, potentially causing electrical shock or fire b. An interruption in the flow of electricity due to an overload c. A surge in electrical current caused by faulty wiring d. A short circuit that occurs when a live wire comes into contact with a grounded surface Incorrect. Ground faults involve unintended current flow to the ground. Correct! Ground faults can be hazardous if not addressed. Ground faults occur when electricity flows through unintended paths, posing safety risks. Lockout-Tagout is a safety protocol used in many electrical tasks. 6 / 50 Commissioning orders do not require Lockout-Tagout. a. False b. True Incorrect. Lockout-Tagout is crucial during commissioning tasks. Correct! Commissioning requires Lockout-Tagout for safety. Commissioning involves working with electrical systems, so Lockout-Tagout is required for safety. Think about tasks that are not usually handled by EVSE techs in the field. 7 / 50 Which of the following is NOT a work order an EVSE tech would typically receive? a. Commissioning b. Installation c. Preventative Maintenance d. Corrective Maintenance Incorrect. Other options are standard field tasks. Correct! Installation is not a typical field task for EVSE techs. Installation is generally handled by specialized teams, not regular EVSE techs. The NOC’s focus is on monitoring and managing EVSE networks. 8 / 50 A NOC for EVSE primarily deals with vehicle maintenance. a. True b. False Incorrect. NOCs are not involved in vehicle repairs or maintenance. Correct! NOCs oversee EVSE networks, not vehicles. NOCs manage network operations, not direct vehicle maintenance. User security focuses on financial and personal data. 9 / 50 What are the security concerns for EVSE users? a. Protect personal data such as name, passwords, and address b. Protect station’s intellectual property such as software c. Both A and B d. Protect credit card and payment information e. All of the above Incorrect. Intellectual property is not typically a user concern. Correct! Financial and personal data are key user concerns. EVSE users’ main security concerns are protecting their financial and personal information. EVSE systems involve high voltage and current levels. 10 / 50 An energized EVSE carries a fatal amount of electric energy. a. True b. False Incorrect. Energized EVSE systems pose serious risks. Correct! Energized EVSE systems carry dangerous levels of energy. Energized EVSE systems can carry enough energy to cause severe harm or fatal injuries. Higher-power chargers require commissioning to ensure safety and functionality. 11 / 50 Which of the following charger types require commissioning? a. Level 2 b. Neither c. Both d. Level 1 Incorrect. Only certain charger types require commissioning. Correct! Level 2 chargers typically require commissioning. Level 2 chargers require commissioning to verify proper installation and operation. It’s a versatile tool that combines several measurement functions. 12 / 50 What piece of equipment can measure both voltage and continuity? a. Ammeter b. Voltmeter c. Oscilloscope d. Multimeter Incorrect. The correct tool measures both voltage and continuity. Correct! A multimeter is designed for multiple measurement tasks. A multimeter can measure voltage, resistance, and continuity, making it a versatile tool. Safety practices aim to minimize the risk of electrical accidents and injuries. 13 / 50 Which of the following is NOT a common safety practice when working with electrical systems? a. Using insulated tools b. Working on live circuits whenever possible c. Lockout tagout procedures d. Wearing personal protective equipment (PPE) Incorrect. This is not a safe practice when dealing with electrical systems. Correct! Avoid working on live circuits whenever possible to ensure safety. Working on live circuits is extremely dangerous and should be avoided unless absolutely necessary and under strict precautions. HMI evaluations focus on the condition and functionality, not size. 14 / 50 Which of the following should NOT be included when evaluating an HMI screen? a. Is the screen big enough? b. Is the screen responsive (if it is a touch screen)? c. All of the above d. Is the screen cracked? Incorrect. Screen size is not part of standard evaluations. Correct! Screen size is irrelevant in HMI evaluations. Evaluating an HMI screen involves checking for damage and functionality, not size. Think about how network changes are managed centrally. 15 / 50 All corrective maintenance work orders require a NOC to be contacted. a. True b. False Incorrect. NOC involvement is mandatory for corrective maintenance orders. Correct! NOC involvement ensures maintenance is handled efficiently. Corrective maintenance must involve the NOC to ensure proper coordination and approval. Focus on interior components, not external ones. 16 / 50 Which of the following are NOT potential signs of damage for interior components? a. Charging cable is cut and wires are exposed b. Interior components have signs of burn or are on fire c. An arc flash is visible d. Smoke is seen or smelled Incorrect. This issue pertains to external cables. Correct! Cable issues are external, not internal. A cut cable is an external issue, not an internal component concern. Arc blasts involve rapid expansion of air, causing significant force. 17 / 50 The hazards resulting from an arc flash/arc blast are heat, shrapnel, intense light, sound, and ________. a. Angry workers b. Pressure c. Body parts d. Flying tools Incorrect. Pressure is one of the major hazards in arc blasts. Correct! Pressure waves are a serious risk in arc flash incidents. Arc flashes release immense energy, generating pressure waves that can cause damage. Commissioning focuses on technical setup and functionality, not cleaning tasks. 18 / 50 Commissioning requests may include removing dust, cobwebs, and debris from EVSE. a. False b. True Incorrect. Commissioning tasks are more technical than cleaning. Correct! Cleaning is not part of commissioning requests. Commissioning involves technical tasks such as testing and configuration, not general cleaning. EVSE testers are used for diagnosing electrical and network-related issues. 19 / 50 How does the EVSE tester help diagnose issues with charging stations? a. By measuring power consumption b. By analyzing tire pressure c. By assessing connectivity between EV and EVSE d. By checking oil levels Incorrect. The EVSE tester focuses on connectivity, not unrelated parameters. Correct! The EVSE tester checks the connectivity between EVs and charging stations. The EVSE tester checks the connection between the EV and the charging station to diagnose potential issues. EVSE testers are designed for field work. 20 / 50 Which of the following statements about an EVSE tester is true? a. It can diagnose software issues in computers b. It is waterproof and can be submerged in water c. It is designed for testing kitchen appliances d. It is portable and easy to use for on-site testing of charging stations Incorrect. EVSE testers are specialized tools for charging stations. Correct! EVSE testers are portable and efficient for testing. EVSE testers are lightweight and portable, allowing technicians to test stations efficiently. The NOC is responsible for ensuring the functionality of network systems. 21 / 50 What is the primary function of a Network Operations Center (NOC)? a. Monitoring and managing network infrastructure b. Developing software applications c. Managing network security d. Providing customer support The primary role of a NOC is to monitor, manage, and maintain the network infrastructure. Correct! The NOC focuses on monitoring and managing network systems. The primary role of a NOC is to monitor, manage, and maintain the network infrastructure. Proper safety equipment is essential before starting any task. 22 / 50 What is the first thing you do prior to any field work? a. Identify the required PPE b. Call the NOC c. Submit completed work order d. Swap out the EV Charging Station Incorrect. Safety comes before any other task. Correct! PPE ensures personal safety during work. Identifying and using the correct PPE protects technicians from hazards. Communication with the site host is a safety protocol. 23 / 50 You do not need to check in with the site host if you are working on preventative maintenance. a. False b. True Incorrect. Always check in with the site host. Correct! Checking in ensures safety and accountability. Site hosts must be informed of any work being performed on their property. Remote monitoring is typically associated with smart or networked chargers. 24 / 50 Conventional charging allows for remote monitoring. a. False b. True Incorrect. Conventional charging lacks remote monitoring features. Correct! Remote monitoring is not available with conventional chargers. Conventional charging does not have remote monitoring capabilities, unlike smart chargers. Torquing involves ensuring proper tightness of connections. 25 / 50 Which of the following is involved in proper torquing maintenance? a. Checking tire pressure b. Lubricating electrical components c. Cleaning the charging cable d. Tightening bolts to the manufacturer's specified torque value Incorrect. Proper torquing involves tightening bolts to specific values, not these tasks. Correct! Proper torquing maintenance involves ensuring bolts meet specified torque values. Proper torquing ensures that bolts are tightened to a specific value, maintaining safety and functionality. Crimping creates firm connections between wires and terminals. 26 / 50 Why is crimping important for EVSE maintenance? a. It maintains proper current flow b. It ensures a secure electrical connection between wires c. It prevents electrical arcing d. It reduces the risk of overheating Incorrect. Crimping is about securing electrical connections. Correct! Crimping ensures secure wire connections in EVSE systems. Crimping ensures wires are securely connected, reducing the risk of loose connections or faults. Consider the environmental exposure outdoor EVSEs face compared to indoor units. 27 / 50 Indoor EVSEs require more maintenance than outdoor EVSEs. a. False b. True Incorrect. Indoor EVSEs are less exposed and typically require less maintenance. Correct! Outdoor EVSEs generally need more maintenance. Outdoor EVSEs require more maintenance due to exposure to weather and environmental factors. The NFPA 70 is also known as the National Electrical Code (NEC). 28 / 50 Which of the following is NOT addressed by the NFPA 70? a. Telecommunications wiring standards b. Decorative Lighting c. Fire alarm system installation d. Electrical equipment labeling requirements Incorrect. This topic is addressed by the NFPA 70. Correct! Telecommunications wiring is outside the scope of the NFPA 70. The NFPA 70 is also known as the National Electrical Code (NEC). These chargers are often used in commercial and public settings for fast charging. 29 / 50 Which type of EV charger has the highest level of amps? a. Level 3 b. Level 1 c. Level 2 Incorrect. Level 1 and 2 chargers have lower amperage than Level 3 chargers. Correct! Level 3 chargers provide the highest amperage for faster charging. Level 3 chargers, also known as DC fast chargers, operate at higher amperages to charge EVs rapidly. Focus on functional issues, not aesthetic ones. 30 / 50 Which of the following is NOT included in EVSE cable/port inspection? a. The cable is not black b. The connector is missing c. The connector has an exposed pin d. The cable has exposed wire Incorrect. Functional issues, not appearance, are critical for inspection. Correct! Cable color is not a concern during inspections. Inspections check for functionality and safety, not color. These professionals are licensed to handle electrical work. 31 / 50 Who is responsible for installing, repairing, and maintaining electrical systems in buildings? a. Electricians b. Dispatchers c. Site Hosts d. CPOs Incorrect. This is not within their scope of responsibilities. Correct! Electricians handle electrical installations and maintenance. Electricians are trained and licensed to work on electrical systems. Amperage checks are part of routine electrical maintenance. 32 / 50 Amperage checks verify that electrical current is within an acceptable range. a. True b. False Incorrect. Amperage checks are crucial for maintaining safe electrical systems. Correct! Amperage checks help ensure electrical safety. Amperage checks ensure that the current flow is within safe operational limits. Serious electrical tasks or safety hazards require licensed electricians. 33 / 50 Which scenarios require escalation and for a licensed electrician to be brought in? a. Any task that involves running new wires from the EVSE to the power grid b. Answers B and C only c. Frayed or damaged wiring at the electrical panel d. Tripped breaker at the electrical panel Incorrect. Only certain issues need licensed electricians. Correct! Damaged wiring and new installations require licensed professionals. Tasks involving damaged wiring or new installations require professional handling. Preventative maintenance focuses on inspection and upkeep. 34 / 50 Preventative maintenance includes part replacement or repair. a. False b. True Incorrect. Preventative maintenance does not include repairs. Correct! Repairs are not part of preventative maintenance. Preventative maintenance involves regular checks and cleaning, not replacing or repairing parts. Preventative maintenance does not directly impact energy efficiency. 35 / 50 Which of the following is NOT a reason for preventative maintenance of EVSE? a. Decreasing energy consumption during charging b. Ensuring optimal performance and reliability c. Minimizing the risk of unexpected failures d. Maximizing the lifespan of the equipment Incorrect. Preventative maintenance focuses on reliability, not energy efficiency. Correct! Energy consumption is not directly influenced by preventative maintenance. Preventative maintenance ensures reliability and longevity but doesn’t affect energy consumption. Think about various types of connectivity options. 36 / 50 Which of the following is a way an EVSE can connect to a CPO network? a. All of them b. None of them c. Wi-Fi d. Cellular network e. Wired Internet Connection Incorrect. EVSEs use multiple types of connections for network access. Correct! EVSEs can connect via cellular, Wi-Fi, and wired connections. EVSEs can connect to CPO networks through cellular, Wi-Fi, or wired connections, depending on infrastructure. Think about how PPE protects against potential arc flash injuries. 37 / 50 Arc flash hazard analysis helps determine appropriate PPE. a. True b. False Incorrect. Arc flash hazard analysis directly relates to PPE selection. Correct! Arc flash analysis helps in selecting the right protective equipment. Arc flash analysis evaluates potential risks and specifies PPE to protect workers. Each carrier uses distinct signal bands. 38 / 50 When testing cell signal with a SureCall, a separate scan must be performed for each cell carrier (AT&T, Verizon, T-Mobile). a. True b. False Incorrect. Each carrier’s network operates on different frequencies. Correct! Separate scans ensure all carriers’ signals are tested. SureCall tests signals for specific carriers, so separate scans are necessary. NOCs play a role in managing and troubleshooting charging operations. 39 / 50 NOCs are responsible for remotely controlling charging processes. a. True b. False Incorrect. NOCs manage charging operations remotely. Correct! NOCs control charging operations remotely. NOCs remotely monitor and control EVSE charging processes to ensure functionality and address issues. Think about the limitations of LAN versus WAN networks. 40 / 50 A LAN network enables a NOC to access many EVSEs across a large geographic area. a. False b. True Incorrect. LAN networks are limited to local coverage. Correct! LAN networks cannot span large geographic areas. A LAN network is local, whereas WAN networks are used for wider geographic coverage. Signal tests are essential for ensuring reliable network communication. 41 / 50 True or False: EVSE Techs perform a cell signal test to ensure EVSE can receive network signals. a. True b. False Incorrect. Signal tests are a critical part of EVSE setup and diagnostics. Correct! Cell signal tests ensure network connectivity for EVSE systems. Cell signal tests verify that the EVSE can connect to the network for proper operation and monitoring. Torque is related to rotating objects like wheels or bolts. 42 / 50 What is torque? a. The force applied to an object b. The rotational force applied to an object c. The rate of change of velocity d. The distance traveled by an object Incorrect. Torque specifically refers to rotational force, not linear motion or velocity. Correct! Torque is the rotational force applied to an object. Torque refers to the rotational force applied to an object, crucial for mechanics and engineering. It’s a widely adopted code used in various applications beyond just residential buildings. 43 / 50 What is the primary purpose of the NFPA 70? a. To mandate specific electrical equipment brands for commercial buildings b. To regulate the installation of electrical equipment in residential buildings only c. To provide guidelines for safe electrical installations in all types of sites d. To enforce electrical safety protocols in industrial settings only Incorrect. The NFPA 70 applies to all types of electrical installations, not just specific applications. Correct! The NFPA 70 provides universal safety guidelines. The NFPA 70 establishes standards for the safe installation of electrical wiring and equipment in any setting. Overloading a circuit involves connecting more devices than it can safely handle, regardless of the individual power draw. 44 / 50 You can safely overload a circuit by plugging in multiple devices as long as they are not drawing a lot of power. a. True b. False Incorrect. Overloading a circuit is dangerous, regardless of how much power each device uses. Correct! Overloading a circuit is unsafe and can lead to severe electrical hazards. Overloading can lead to overheating and fire hazards, even if devices don’t draw much power individually. Preventing data breaches involves multiple layers of security. 45 / 50 Which of the following helps to avoid data breaches? a. Ensure locks are functioning properly b. All of the above c. Maintain physical security for the EVSE station d. Lock cabinets Incorrect. All these measures collectively help avoid data breaches. Correct! These measures ensure data security. Maintaining physical security, locking cabinets, and checking locks all help prevent unauthorized access. Work orders outline the specific tasks to be carried out. 46 / 50 What is included in a work order for EVSE? a. Location of nearby charging stations b. Vehicle registration information c. Description of tasks to be performed d. Charging session history Incorrect. Work orders focus on task descriptions, not auxiliary information. Correct! Work orders specify the tasks to be done. Work orders include a detailed description of the tasks to be performed for EVSE maintenance or repair. The term relates to monitoring and managing network infrastructure. 47 / 50 What does NOC stand for? a. National Oversight Committee b. National Operations Center c. Network Operations Center d. Network Operations Control Incorrect. This acronym is related to managing network systems. Correct! NOC refers to the Network Operations Center. NOC stands for Network Operations Center, which oversees network systems. Think about the first visual check a technician would perform on the station’s exterior. 48 / 50 What are you inspecting on the exterior of the station as an Electric Vehicle Supply Equipment (EVSE) technician? a. Internal breaker b. Branding inconsistencies c. Signs of damage d. Charging session history Incorrect. Exterior inspections focus on potential physical damage. Correct! External damage is a primary focus during inspections. External inspections focus on identifying physical damage that could affect station safety or performance. Arc flash risks can occur at various voltage levels, not just high voltage. 49 / 50 Arc flash hazard analysis is only for high-voltage systems. a. False b. True Incorrect. Arc flash is not limited to high-voltage systems. Correct! Arc flash risks apply across different voltage levels. Arc flash can happen in low- and medium-voltage systems, making analysis essential for all voltages. Consider the remedy when repairs are not feasible. 50 / 50 What is the most common exterior maintenance remedy for exterior work orders? a. Basic greasing of the charging station b. Replacement of used parts c. Replacement of wiring d. Swapping out charging station Incorrect. Swapping out is often more efficient for severe issues. Correct! Swapping out is a common solution for exterior issues. When exterior issues cannot be repaired, swapping out the station is the best solution. Your score is LinkedIn Facebook Twitter 0% Restart quiz Exit Rate & Review Thank you for taking the time to leave us a review! 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