1 Scope
This part of IEC 60079 contains the specific requirements for design, construction and assessment of intrinsically safe systems, Type of Protection “i”, intended for use, as a whole or in part, in locations in which the use of Group I, II or III Ex Equipment is required.
NOTE 1 This standard is intended for use by the designer of the system e.g. a person who could be a manufacturer, a specialist consultant or a member of the end-user’s staff.
This document supplements and modifies the general requirements of IEC 60079‑0 and the intrinsic safety standard IEC 60079‑11. Where a requirement of this standard conflicts with a requirement of IEC 60079‑0 or IEC 60079‑11, the requirement of this standard takes precedence.
The installation requirements of Group II or Group III systems designed in accordance with this document are specified in IEC 60079‑14. Where a specific requirement of IEC 60079‑14 is applied by this document, the same requirements can be applied for Group I.
NOTE 2 Group I installation requirements are presently not provided in IEC 60079‑14. Installation requirements for Group I are being considered.