NCCER Electrical 1 Module 10 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NCCER Electrical 1 Module 10 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified Why is it important to follow the National Electrical Code (NEC)? The NEC ensures electrical installations are safe, standardized, and meet regulatory requirements. What does an ohmmeter measure? An ohmmeter measures the resistance in an electrical circuit. Why is it important to use insulated tools when working with electricity? Insulated tools protect the user from electrical shock while working on live circuits. What is the difference between AC and DC current? AC current alternates direction periodically, while DC current flows in one constant direction. What is the primary purpose of a GFCI outlet? 2 A GFCI outlet protects against electrical shocks by shutting off power when it detects an imbalance in the electrical current. What is the role of a transformer in an electrical system? A transformer changes the voltage level of electrical power to meet the needs of the system. What should you do before working on an electrical circuit? Always turn off the power to the circuit and verify that it is de-energized using a voltage tester. What is the purpose of a wiring diagram? A wiring diagram shows how electrical components are connected, helping to ensure proper installation and troubleshooting. Why are electrical wires color-coded? Color coding helps identify the purpose of each wire, such as hot, neutral, and ground, ensuring safe and accurate connections. What is the function of an electrical junction box? 3 A junction box houses wire connections, protecting them from damage and containing sparks in case of a short circuit. What is the standard voltage for residential outlets in the United States? The standard voltage for residential outlets is 120 volts. Why is it important to calculate load capacity for an electrical circuit? Calculating load capacity ensures the circuit can handle the connected devices without overloading, which can prevent fires and damage. What tool is used to strip insulation from electrical wires? A wire stripper is used to remove insulation from electrical wires. What safety precautions should be taken when working near live electrical circuits? Wear appropriate personal protective equipment (PPE), use insulated tools, and avoid direct contact with live wires. How can you test if an outlet is functioning correctly?