This document summarizes Chapter 52 and Section 522 of the IEE Wiring Regulations 17th Edition Part 5. Chapter 52 discusses the selection and erection of wiring systems and contains 10 sections. Section 522 specifically addresses selecting and erecting wiring systems in relation to external influences, such as ambient temperature, external heat sources, water, humidity, foreign bodies, corrosive substances, and impact. The external influences are categorized in Appendix 5.