NEC Article 640 covers which equipment?

NEC Article 640 covers which equipment?

• A. video display
• B. electrical distribution
• C. audio signal processing equipment
• D. lighting fixtures

Answer: (C)

This question tests your understanding of what NEC Article 640 covers. Article 640 is titled Audio Signal Processing Equipment, so it applies to electrical installations for gear that processes audio signals—things like audio mixers, processors, equalizers, limiters, crossovers, and powered amplifiers used in sound systems. The focus is on how this equipment is powered and installed safely, including what conductors and overcurrent protection are appropriate, grounding and bonding requirements, wiring methods, enclosure and mounting considerations, and general installation practices specific to audio signal processing gear. It does not apply to video display equipment, electrical distribution gear, or lighting fixtures, which fall under other NEC articles.

This question tests your understanding of what NEC Article 640 covers. Article 640 is titled Audio Signal Processing Equipment, so it applies to electrical installations for gear that processes audio signals—things like audio mixers, processors, equalizers, limiters, crossovers, and powered amplifiers used in sound systems. The focus is on how this equipment is powered and installed safely, including what conductors and overcurrent protection are appropriate, grounding and bonding requirements, wiring methods, enclosure and mounting considerations, and general installation practices specific to audio signal processing gear. It does not apply to video display equipment, electrical distribution gear, or lighting fixtures, which fall under other NEC articles.