Which code regulates electrical installations in buildings?

The National Electrical Code (NEC) is the correct answer because it specifically addresses the safety requirements for electrical installations in residential, commercial, and industrial buildings. It provides guidelines for safe electrical design, installation, and inspection to protect people and property from electrical hazards. The NEC covers various aspects of electrical work, including wiring methods, materials, load calculations, and grounding, ensuring that electrical systems are installed in a safe and compliant manner.

Other codes mentioned, while critical to construction and safety, focus on different areas. The International Building Code (IBC) is comprehensive regarding structural integrity, fire safety, means of egress, and overall building performance but does not delve into electrical specifics. The International Plumbing Code (IPC) governs the installation and maintenance of plumbing systems, and the National Fire Code (NFC) addresses fire prevention and safety standards concerning fire-related systems. Each code serves its purpose, but the NEC distinctly focuses on electrical systems and their safe implementation.