IEC 60079-14 contains the specific requirements for the design of electrical systems, as well as the selection, installation, and initial inspection of electrical installations of Ex Equipment in or associated with explosive atmospheres. It also includes requirements for documentation and personnel competency. These requirements are in addition to the requirements for installations in non-hazardous areas.
For voltages up to 1 000 V AC or 1 500 V DC requirements of this document are based on installation requirements in the IEC 60364 series and for higher voltages in the IEC 61936 series. In addition, other relevant national requirements can apply. For offshore, the IEC 61892 series is applicable.
IEC 60079-14 applies to all electrical Ex Equipment including fixed, transportable, portable and personal, and installations, permanent or temporary. Guidance on transportable, portable or personal equipment can be found in Annex I and IEC TS 60079-48.
It does not apply to:
— electrical installations in mines susceptible to firedamp,
— inherently explosive situations and dust from explosives or pyrophoric substances (for example explosives manufacturing and processing),
— rooms used for medical purposes,
— electrical installations in areas where the hazard is due to flammable mist and
— installation of non-electrical Ex Equipment (unless being part of an equipment assembly according to IEC TS 60079-46).
No account is taken in this document of the toxic hazards that are associated with flammable gases, liquids and dusts in concentrations that are usually very much less than the lower flammable limit. In locations where personnel could be exposed to potentially toxic concentrations of flammable material, appropriate precautions are necessary. Such precautions are outside the scope of this document.
IEC 60079-14:2024 text has been approved in Europe as EN IEC 60079-14:2024 without any changes.
