NCCER Electrical Level 2 Module 4 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NCCER Electrical Level 2 Module 4 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified How does an electrical meter work? An electrical meter measures the amount of electricity consumed by a building or facility, typically in kilowatt-hours. What is a continuity tester used for? A continuity tester checks whether there is a continuous electrical path between two points in a circuit. What should you do if you find a damaged electrical wire during inspection? The damaged wire should be replaced or properly repaired to avoid electrical hazards or failures. Why is it important to size a circuit correctly? Properly sized circuits ensure that the wiring can handle the electrical load without overheating or causing system failures. 2 What is a volt-ampere rating (VA)? Volt-ampere rating indicates the total amount of power that an electrical component can handle, similar to watts but without considering power factor. What does "conduit" mean in electrical systems? Conduit is a protective tube or casing that houses and shields electrical wiring from physical damage or exposure to the elements. What happens if a circuit is overloaded? An overloaded circuit can cause the wiring to overheat, potentially leading to a fire or tripping the breaker to prevent damage. How does a fuse protect an electrical circuit? A fuse breaks the circuit when the current exceeds a safe level, preventing damage to equipment or wiring. Why is it important to understand wire color codes? Wire color codes identify the function of each wire, ensuring proper connections and safety during installation. 3 What is the role of a disconnect switch in an electrical system? A disconnect switch allows for the manual disconnection of power to a system for maintenance or safety purposes. How does a relay function in a circuit? A relay uses an electromagnet to control the opening and closing of a switch, enabling high- power circuits to be controlled by low-power signals. What is a load center in an electrical distribution system? A load center, or breaker panel, distributes electrical power to various circuits and provides overcurrent protection. Why is proper wire insulation essential in electrical work? Insulation prevents electrical shorts, reduces the risk of electrical shock, and protects wires from environmental damage. What is the difference between a circuit breaker and a fuse? A circuit breaker can be reset after it trips, while a fuse needs to be replaced once it blows. 4 Why should you not bypass a circuit breaker? Bypassing a circuit breaker can lead to overloading, equipment damage, and increased risk of electrical fires. What does "ampacity" refer to? Ampacity is the maximum amount