NCCER Electrical 2 Module 9 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NCCER Electrical 2 Module 9 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the purpose of overcurrent protection in electrical circuits? Overcurrent protection prevents damage to electrical circuits and components by disconnecting the power when the current exceeds a safe level. Why is it important to use the correct wire size in an electrical installation? Using the correct wire size ensures the wire can safely carry the required current without overheating, preventing fire hazards. What is the role of a disconnect switch in electrical systems? A disconnect switch isolates electrical equipment from the power supply, providing a safe way to perform maintenance or emergency shutdowns. What does an electrical load refer to? An electrical load refers to any device or appliance that consumes electrical power in a circuit. 2 What is the purpose of a ground fault circuit interrupter (GFCI)? A GFCI detects and interrupts current flow when it senses a ground fault, helping to prevent electrical shock. Why is proper conduit installation important in electrical wiring? Proper conduit installation protects electrical wiring from physical damage and environmental factors, ensuring the safety and longevity of the system. What is a transformer’s role in electrical systems? A transformer changes the voltage level in an electrical circuit, either stepping it up or stepping it down for safe use. How does a capacitor improve power factor in an electrical system? A capacitor helps to correct power factor by providing reactive power, thus improving energy efficiency and reducing losses. What is the function of a circuit breaker panel? A circuit breaker panel houses circuit breakers that protect circuits from overloads by interrupting the flow of electricity when necessary. 3 What is the importance of bonding in an electrical system? Bonding ensures all metal parts of the electrical system are at the same electrical potential, reducing the risk of electric shock. Why is it important to test electrical connections after installation? Testing ensures that all connections are secure and free from faults, ensuring safe and reliable operation of the electrical system. What is a relay’s function in an electrical control system? A relay is an electrically operated switch that allows one circuit to control another, often used for controlling high-power devices. What does a multimeter measure in an electrical circuit? A multimeter measures voltage, current, and resistance in an electrical circuit, helping troubleshoot and diagnose issues. What is the difference between a grounding electrode and a grounding conductor? 4 A grounding electrode connects the electrical system to the earth, while a grounding conductor connects the system’s components