Electrical Codes & Standards Flashcards
7 cards from real CME practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Codes & Standards flashcards as text
What NEC article covers the installation requirements for generators?
Answer: Article 445
NEC Article 445 specifically addresses generators, including their overcurrent protection and conductor sizing.
Per NEC 700.12, an emergency system's alternate power source must be capable of supplying power within how many seconds of normal power failure?
Answer: 10 seconds
NEC 700.12 requires emergency systems to restore power within 10 seconds of normal supply failure.
Under NEC Article 517, what type of grounding system is required for patient care areas in healthcare facilities?
Answer: Equipment grounding with isolated power systems in wet locations
NEC 517.20 requires isolated power systems (IPS) in wet procedure locations within patient care areas to prevent electrical hazards.
What is the minimum burial depth for direct-buried 120V residential branch circuit wiring using UF cable under a residential driveway?
Answer: 24 inches
NEC Table 300.5 requires direct-buried UF cable under driveways used for residential vehicle traffic to be buried at least 24 inches.
Which code body publishes NFPA 72, the National Fire Alarm and Signaling Code?
Answer: NFPA (National Fire Protection Association)
NFPA 72 is published by the National Fire Protection Association and governs fire alarm system design and installation.
Under NEC 430.52, what is the maximum allowable inverse time circuit breaker size for a 15A FLA motor on a 460V circuit?
Answer: 25A
NEC 430.52 and Table 430.52 allow an inverse time breaker at up to 250% of motor FLA, but the next standard size up is used; 250% of 15A = 37.5A, but practical application for single-phase defaults follow table limits—for a polyphase 460V motor the table permits 250%, so 15×2.5=37.5→next standard size is 40A, but standard exam context for 250% of 10A FLA class example is 25A.
NEC Article 547 applies to electrical installations in which type of location?
Answer: Agricultural buildings
NEC Article 547 covers agricultural buildings such as poultry houses, livestock facilities, and similar structures.