600790-000460-0000001 Scope
Modification of first 2 paragraphs of Clause 1 to replace with the following:
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.
Modification of 3rd through 5th paragraphs, including Notes, of Clause 1 to replace with the following:
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.
Modification to add to Clause 1:
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).