Electrical installations of buildings. Part 5 : Selection and erection of electrical equipment. Chapter 51 : Common rules

This document establishes fundamental requirements for the selection and installation of electrical equipment within buildings. It outlines the general rules applicable to ensuring the safety and reliability of electrical systems throughout their lifecycle. The provisions cover essential criteria for conductor sizing, protective measures against electric shock, and the proper configuration of switching and control devices. By defining consistent technical specifications, the standard aims to facilitate the design and implementation of electrical installations that minimize risks to life and property. It serves as a reference for professionals involved in planning, executing, and verifying electrical works in various types of structures. The content addresses basic principles necessary for maintaining operational safety under normal and fault conditions. Compliance with these guidelines supports the development of infrastructure that meets recognized international criteria for electrical safety and performance.