Which document is specifically described as installation standards?

• A. NEC
• B. PCP-650
• C. NFPA-70E
• D. IRRT

Answer: (A)

Installation standards are the rules that specify how electrical systems must be installed to be safe and code-compliant. The National Electrical Code, commonly referred to as the NEC, is the document that lays out these installation requirements—covering wiring methods, conductor sizing, overcurrent protection, grounding, enclosure rules, and other installation practices. It’s the primary standard that governs how electrical work should be installed. The other options serve different roles: NFPA 70E focuses on safety practices for workers around electrical equipment, not on installation details, and PCP-650 and IRRT aren’t recognized as the primary installation standards in this context.