UL 60079-1
Standard for Explosive Atmospheres - Part 1: Equipment Protection by Flameproof Enclosures “d”

DETAILS
Edition Number:7SCC Approved:--
Edition Date:2015-09-18DOD Approved: --
Price Code:GANSI Approved: 2015-09-18
Type:uliec

  • SCOPE

    1 Scope

    1DV.1 Modification of Clause 1, first paragraph to replace with the following:

    1DV.1.1 This part of IEC 60079 standard contains specific requirements for the construction and testing of electrical equipment with the type of protection flameproof enclosure “d”, intended for use in explosive gas atmospheres.

    This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard will take precedence.

    1DV.2 Addition of 1DV.2.1

    1DV.2.1 Where references are made to IEC 60079 standards, the referenced requirements found in these standards shall apply as modified by any applicable U.S. National Differences.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
    • UL Preface
    • Deviations
    • IEC Foreword
      • EXPLOSIVE ATMOSPHERES – Part 1: Equipment protection by flameproof enclosures “d”
        • 1 Scope
        • 2 Normative references
        • 3 Terms and definitions
        • 4 Level of protection (equipment protection level, EPL)
          • 4.1 General
          • 4.2 Requirements for level of protection “da”
          • 4.3 Requirements for level of protection “db”
          • 4.4 Requirements for level of protection “dc”
        • 5 Flameproof joints
          • 5.1 General requirements
          • 5.2 Non-threaded joints
          • 5.3 Threaded joints
          • 5.4 Gaskets (including O-rings)
          • 5.5 Equipment using capillaries
        • 6 Sealed joints
          • 6.1 Cemented joints
          • 6.2 Fused glass joints
        • 7 Operating rods
        • 8 Supplementary requirements for shafts and bearings
          • 8.1 Joints of shafts
          • 8.2 Bearings
        • 9 Light-transmitting parts
        • 10 Breathing and draining devices which form part of a flameproof enclosure
          • 10.1 General
          • 10.2 Openings for breathing or draining
          • 10.3 Composition limits
          • 10.4 Dimensions
          • 10.5 Elements with measurable paths
          • 10.6 Elements with non-measurable paths
          • 10.7 Removable devices
          • 10.8 Mechanical strength
          • 10.9 Breathing devices and draining devices when used as Ex components
        • 11 Fasteners and openings
        • 12 Materials
        • 13 Entries for flameproof enclosures
          • 13.1 General
          • 13.2 Threaded holes
          • 13.3 Non-threaded holes (for Group I only)
          • 13.4 Cable glands
          • 13.5 Conduit sealing devices
          • 13.6 Plugs and sockets and cable couplers
          • 13.7 Bushings
          • 13.8 Blanking elements
        • 14 Verification and tests
        • 15 Type tests
          • 15.1 General
          • 15.2 Tests of ability of the enclosure to withstand pressure
          • 15.3 Test for non-transmission of an internal ignition
          • 15.4 Tests of flameproof enclosures with breathing and draining devices
          • 15.5 Tests for “dc” devices
        • 16 Routine tests
          • 16.1 General
          • 16.2 Enclosures not incorporating a welded construction
          • 16.3 Enclosures incorporating a welded construction
          • 16.4 Bushings not specific to one flameproof enclosure
          • 16.5 Acceptance criteria
          • 16.6 Batch testing
        • 17 Switchgear for Group I
          • 17.1 General
          • 17.2 Means of isolation
          • 17.3 Doors or covers
        • 18 Lampholders and Iamp caps
          • 18.1 General
          • 18.2 Device preventing lamps working loose
          • 18.3 Holders and caps for lamps with cylindrical caps
          • 18.4 Holders for lamps with threaded caps
        • 19 Non-metallic enclosures and non-metallic parts of enclosures
          • 19.1 General
          • 19.2 Resistance to tracking and creepage distances on internal surfaces of the enclosure walls
          • 19.3 Requirements for type tests
          • 19.4 Test of erosion by flame
        • 20 Marking
          • 20.1 General
          • 20.2 Caution and warning markings
          • 20.3 Informative markings
        • 21 Instructions
    • Annex A(normative)Additional requirements for crimped ribbon elements and multiple screen elements of breathing and draining devices
    • Annex B (normative)Additional requirements for elements, with non-measurable paths of breathing and draining devices
    • Annex C(normative)Additional requirements for flameproof entry devices
    • Annex D(normative) Empty flameproof enclosures as Ex components
    • Annex E(normative) Cells and batteries used in flameproof “d” enclosures
    • Annex F(informative)Mechanical properties for screws and nuts
    • Annex G(normative)Additional requirements for flameproof enclosures with an internal source of release (containment system)
    • Annex H (normative) Requirements for machines with flameproof “d” enclosures fed from converters
    • Bibliography