NEC- Chapter 2 Review Questions and Answers | Latest Version | 2024/2025 | Correct & Verified

NEC- Chapter 2 Review Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the minimum size ground wire required for a 100-amp residential service? 8 AWG copper or 6 AWG aluminum What is the definition of a "feeder" in the context of the NEC? A conductor that carries power from the service or distribution panel to a branch circuit. What is required for electrical installations in wet locations according to the NEC? All electrical equipment must be listed for wet locations, and wiring methods must be appropriate for exposure to moisture. What is the maximum number of conductors allowed in a conduit without derating according to the NEC? Three conductors before derating is required for overcurrent protection. What does the NEC say about the installation of receptacles in bathrooms? 2 Receptacles in bathrooms must be GFCI protected to prevent electrical shock hazards. What is the minimum clearance required for electrical panelboards from the floor? Panelboards must be installed with a minimum of 6 feet 7 inches of clearance from the floor to the top of the panel. What type of overcurrent protection is required for a branch circuit supplying a motor? A motor overload protection device must be used, in addition to the standard circuit breaker or fuse protection. What is the NEC's requirement for the grounding of metallic water piping systems? Metallic water piping systems must be bonded to the electrical system to prevent electrical shock hazards. What is the rule for spacing support for nonmetallic-sheathed cable? Nonmetallic-sheathed cable must be supported every 4.5 feet and within 12 inches of a box or fitting. How does the NEC define "accessible" in terms of electrical installations? 3 Accessible means the installation can be reached without the use of tools or equipment, ensuring safe operation and maintenance. What does the NEC require for electrical installations in hazardous locations? Electrical installations in hazardous locations must use equipment specifically rated for that environment to prevent explosions or fire. What does the NEC say about the installation of circuit breakers in panels? Circuit breakers must be properly installed in their intended spaces in the panelboard to ensure safe operation and protection. What is the NEC's requirement for the use of electrical conductors in raceways? Conductors in raceways must be protected from physical damage, and the raceway must be appropriately sized for the conductors. What does "listed" mean in the NEC? "Listed" refers to products that have been tested and approved by an accredited testing agency to meet safety standards.