scope:

1.1 This

part of IEC 60079

document

, which is a

technical specification

Recommended Practice

, specifies requirements for the design, construction, assembly, testing, inspection, marking, documenting and assessment of equipment assemblies for use in explosive atmospheres under the responsibility of the

assembly

manufacturer

(see 3.4.2ADV)

of the equipment assembly

.

1.2 The requirements of this document apply to individual items according to the

IEC 60079

UL 60079

series or

ISO 80079

UL 80079

series that comprise the assembly and that have individual certificates. These individual items are then integrated as part of the equipment assembly. Also included are requirements to address aspects for the assembly which may be beyond the certificates of the individual items forming the assembly.

The scope of this document includes assessment of the additional requirements for assemblies for hazardous areas and does not include requirements for non-hazardous areas. It is assumed that compliance with other electrical or mechanical requirements that are applicable for non-hazardous areas will be verified by either the same or different party in addition to the requirements of this document.

1.1 This document does not apply to:

- equipment which is covered, in its entirety, by one or more

IEC 60079

UL 60079

and

ISO 80079

UL 80079

equipment types of protection;

- pressurized rooms, "p",

and artificially ventilated rooms, "v"

in accordance with

IEC 60079-13

UL 60079-13

,

artificial ventilation for the protection of analyzer(s) houses

pressurized rooms

in accordance with

IEC TR 60079-16

NFPA 496

, and other standards addressing specific Ex assemblies;

- installation at the end-user site under the scope of

IEC 60079-14

the applicable installation codes (e.g. NFPA 70, API RP 14F, API RP 14FZ)

;

- classification of the hazardous area;

- equipment assemblies for mines susceptible to firedamp (Group I applications);

- 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.

1.2

The specification

This document

is only intended to provide validation for the

initial supply of an

equipment

assembly

as provided. Any subsequent changes made after installation are not covered by this document, and are the responsibility of the local authority having jurisdiction over the installation

.

NOTE 1 Additional guidance on the requirements for hazards due to hybrid mixtures of dust or flyings and flammable gas or vapour is provided in

IEC 60079-14

NFPA 70.

1.3 Where a requirement of this document conflicts with a requirement of either

IEC 60079-0

UL 60079-0

or

ISO 80079-36

UL 80079-36, the requirement of this document takes precedence.

NOTE 2 For this first edition, the only requirements of this document that take precedence over

IEC 60079-0

UL 60079-0

or

ISO 80079-36

UL 80079-36

are the markings for equipment assemblies.

Where references are made to IEC and ISO standards, the referenced requirements found in these standards shall apply as modified by any applicable US National Differences for the standard (see Clause 2).