• EN 50303:2000

    Current The latest, up-to-date edition.

    Group I, Category M1 equipment intended to remain functional in atmospheres endangered by firedamp and/or coal dust

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    Published date:  28-07-2000

    Publisher:  European Committee for Standards - Electrical

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    Introduction
    1 Scope
    2 Normative references
    3 Definitions
    4 General
    5 Category M1 equipment having the requisite level of
          protection in the event of two faults occurring
          independently of each other
    6 Category M1 equipment having the requisite level of
          protection using a second independent means
    7 Requirements for Category M1 flammable gas detectors
          with hot wire or hot pellistor sensing heads
    8 Requirements for Category M1 systems
    9 Type testing
    10 Marking requirements
    11 Instructions

    Abstract - (Show below) - (Hide below)

    1.1This standard specifies the design, construction, testing and marking requirements for Group I, Category M1 equipment intended to remain functional in underground parts of mines, as well as those parts of surface installations of such mines endangered by firedamp and/or coal dust clouds under normal atmospheric conditions of pressures ranging from 0,8 bar to 1,1 bar and temperatures ranging from 20 °C to + 60 °C.

    1.2It applies to all electrical and non-electrical equipment capable of causing an explosion through its own potential source of ignition.

    1.3It also applies to cables, pipes and optical fibres, when such items are used to carry energy sources and form part of equipment intended to remain functional in an atmosphere endangered by firedamp and/or coal dust.

    1.4It does not apply to category M1 Miners' Caplights, which are dealt with in prEN 62013-1 (in preparation).

    NOTE 1As the energy needed to ignite a coal dust /air cloud is in excess of 600 times* that needed to ignite a firedamp /air mixture, this standard assumes that provided intrinsically safe 'ia' circuits are constructed to be safe in an explosive atmosphere of firedamp /air, then such circuits are not capable of directly igniting an explosive atmosphere of coal dust/air.

    * Based on tests performed by several member state laboratories. Verified at the UK Health & Safety Laboratories, Buxton - Report by Dr P. Tolson, dated 9 August 1995 - "Ignition of coal dust/air mixtures using a modified IEC spark test apparatus".

    NOTE 2In designing equipment for operation in explosive atmospheric conditions other than those given in 1.1 above, this standard may be used as a guide. In such cases, additional testing is recommended to allow the manufacturer to be able to demonstrate that the equipment is suitable for the exceptional conditions of use.

    NOTE 3When an explosive firedamp atmosphere occurs in the underground workings of a mine, or at a surface installation, it is imperative that the ignition risk be kept to a minimum. Member State Governments may therefore prohibit the continued use of certain Category M1 equipment in an atmosphere endangered by firedamp and/or coal dust if it is not necessary for it to remain functional for the protection of workers**.

    ** This has its origin in clause 5.1 of the proposals to the Governments of members States adopted by the Safety and Health Commission for Mining and Other Extractive Industries (SHCMOEI) at its meeting on 29.10.1986. Document No 6374/13/82 - "Electrical apparatus and systems for use when the concentration of firedamp exceeds the statutory limit for electricity".

    General Product Information - (Show below) - (Hide below)

    Committee CLC/TC 31
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Current

    Standards Referenced By This Book - (Show below) - (Hide below)

    PREN 1127-1 : DRAFT 2017 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    17/30365866 DC : 0 BS EN 1127-1 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    BS EN 13463-1:2009 Non-electrical equipment for use in potentially explosive atmospheres Basic method and requirements
    UNE-EN 1127-1:2012 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
    BS EN 13463-3:2005 Non-electrical equipment for use in potentially explosive atmospheres Protection by flameproof enclosure \'d\'
    DIN EN 1127-2:2002-07 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    EN 13463-1:2009 Non-electrical equipment for use in potentially explosive atmospheres - Part 1: Basic method and requirements
    EN 13463-6:2005 Non-electrical equipment for use in potentially explosive atmospheres - Part 6: Protection by control of ignition source 'b'
    EN 13463-3:2005 Non-electrical equipment for use in potentially explosive atmospheres - Part 3: Protection by flameproof enclosure 'd'
    EN ISO 80079-37:2016 Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres - Non-electrical type of protection constructional safety 'c', control of ignition sources 'b', liquid immersion 'k' (ISO 80079-37:2016)
    CEI EN 50394-1 : 2005 ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - GROUP 1 - INSTRINSICALLY SAFE SYSTEMS - PARTE 1: COSTRUZIONI E PROVE
    I.S. EN 13463-5:2011 NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    BS EN ISO 80079-37:2016 Explosive atmospheres Non-electrical equipment for explosive atmospheres. Non-electrical type of protection constructional safety \'\'c\'\', control of ignition sources \'\'b\'\', liquid immersion \'\'k\'\'
    I.S. EN 13463-6:2005 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 6: PROTECTION BY CONTROL OF IGNITION SOURCE 'B'
    12/30270980 DC : 0 BS EN 1127-2 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    I.S. EN 50628:2016 ERECTION OF ELECTRICAL INSTALLATIONS IN UNDERGROUND MINES
    BS EN 1127-1:2011 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
    I.S. EN 50020:2002 ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - INTRINSIC SAFETY "I"
    DIN EN 1127-1:2011-10 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    DIN EN 13463-5:2011-10 NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    I.S. EN 1127-2:2014 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    DIN EN 13463-5:2004-03 NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    DIN EN 13463-1:2009-07 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 1: BASIC METHOD AND REQUIREMENTS
    DIN EN 13463-6:2005-07 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 6: PROTECTION BY CONTROL OF IGNITION SOURCE 'B'
    BS EN 50394-1:2004 Electrical apparatus for potentially explosive atmospheres. Group I. Intrinsically safe systems Construction and testing
    I.S. EN 13463-1:2009 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 1: BASIC METHOD AND REQUIREMENTS
    DIN EN ISO 80079-37:2016-12 Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres - Non-electrical type of protection constructional safety "c", control of ignition sources "b", liquid immersion "k" (ISO 80079-37:2016)
    I.S. EN 1127-1:2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    I.S. EN 50394-1:2004 ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - GROUP 1 - INTRINSICALLY SAFE SYSTEMS; PART 1: CONSTRUCTION AND TESTING
    DIN EN 1710:2008-08 EQUIPMENT AND COMPONENTS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES IN UNDERGROUND MINES
    DIN EN 13463-3:2005-07 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 3: PROTECTION BY FLAMEPROOF ENCLOSURE 'D'
    DIN EN 1127-2:2014-09 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    I.S. EN 13463-3:2005 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 3: PROTECTION BY FLAMEPROOF ENCLOSURE 'D'
    UNE-EN 13463-5:2013 Non-electrical equipment intended for use in potentially explosive atmospheres - Part 5: Protection by constructional safety 'c'
    UNI EN 13463-1 : 2009 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 1: BASIC METHOD AND REQUIREMENTS
    UNI EN 13463-5 : 2011 NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    EN 50020:2002 Electrical apparatus for potentially explosive atmospheres - Intrinsic safety 'i'
    UNI EN 1127-2 : 2014 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    UNI EN 1710 : 2008 EQUIPMENT AND COMPONENTS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES IN UNDERGROUND MINES
    03/300203 DC : DRAFT FEB 2003 EN 50394-1 - ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - GROUP 1: INTRINSICALLY SAFE SYSTEMS - PART 1: CONSTRUCTION AND TESTING
    BS EN 50020:2002 Electrical apparatus for potentially explosive atmospheres. Intrinsic safety \'i\'
    I.S. EN ISO 80079-37:2016 EXPLOSIVE ATMOSPHERES - PART 37: NON-ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - NON-ELECTRICAL TYPE OF PROTECTION CONSTRUCTIONAL SAFETY ''C'', CONTROL OF IGNITION SOURCES ''B'', LIQUID IMMERSION ''K'' (ISO/DIS 80079-37:2014)
    UNE-EN ISO 80079-37:2018 Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres - Non-electrical type of protection constructional safety 'c', control of ignition sources 'b', liquid immersion 'k' (ISO 80079-37:2016)
    BS EN 1127-1:2019 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
    BS EN 13463-5:2011 Non-electrical equipment intended for use in potentially explosive atmospheres Protection by constructional safety \'c\'
    BS EN 50628:2016 Erection of electrical installations in underground mines
    BS EN 13463-6:2005 Non-electrical equipment for potentially explosive atmospheres Protection by control of ignition source \'b\'
    BS EN 1127-2:2014 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology for mining
    ISO 80079-37:2016 Explosive atmospheres Part 37: Non-electrical equipment for explosive atmospheres Non-electrical type of protection constructional safety 'c', control of ignition sources 'b', liquid immersion 'k'
    BS EN 1710 : 2005 EQUIPMENT AND COMPONENTS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES IN UNDERGROUND MINES
    UNE-EN 13463-1:2011 Non-electrical equipment for use in potentially explosive atmospheres - Part 1: Basic method and requirements
    EN 1710:2005+A1:2008/AC:2010 EQUIPMENT AND COMPONENTS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES IN UNDERGROUND MINES
    DIN EN ISO 80079-37 E : 2016 EXPLOSIVE ATMOSPHERES - PART 37: NON-ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - NON-ELECTRICAL TYPE OF PROTECTION CONSTRUCTIONAL SAFETY 'C', CONTROL OF IGNITION SOURCES 'B', LIQUID IMMERSION 'K' (ISO 80079-37:2016)
    09/30199364 DC : 0 BS EN 13463-5 - NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    12/30243459 DC : 0 BS ISO/IEC 80079-37 - EXPLOSIVE ATMOSPHERES - PART 37: NON-ELECTRICAL EQUIPMENT FOR USE IN EXPLOSIVE ATMOSPHERES - NON-ELECTRICAL TYPE OF PROTECTION CONSTRUCTIONAL SAFETY 'CH', CONTROL OF IGNITION SOURCES 'BH', LIQUID IMMERSION 'KH'
    07/30160767 DC : 0 BS EN 13463-1 - NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 1: BASIC METHOD AND REQUIREMENTS
    PREN 13463-5 : DRAFT 2009 NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    UNI EN 1127-1 : 2011 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
    PREN 1127-2 : DRAFT 2012 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
    EN 1127-2:2014 Explosive atmospheres - Explosion prevention and protection - Part 2: Basic concepts and methodology for mining
    EN 50394-1:2004 Electrical apparatus for potentially explosive atmospheres - Group I - Intrinsically safe systems - Part 1: Construction and testing
    EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
    EN 50628:2016 Erection of electrical installations in underground mines
    EN 13463-5:2011 Non-electrical equipment intended for use in potentially explosive atmospheres - Part 5: Protection by constructional safety 'c'

    Standards Referencing This Book - (Show below) - (Hide below)

    EN 50020:2002 Electrical apparatus for potentially explosive atmospheres - Intrinsic safety 'i'
    EN 50017:1998 Electrical apparatus for potentially explosive atmospheres - Powder filling "q"
    EN 50019:2000/corrigendum Apr. 2003 ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - INCREASED SAFETY "E"
    EN 50018 : 2000 AMD 1 2002 ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - FLAMEPROOF ENCLOSURE "D"
    PREN 13463-3 : DRAFT 2002 NON-ELECTRICAL EQUIPMENT FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 3: PROTECTION BY FLAMEPROOF ENCLOSURE 'D'
    PREN 13463-5 : DRAFT 2009 NON-ELECTRICAL EQUIPMENT INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 5: PROTECTION BY CONSTRUCTIONAL SAFETY 'C'
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    EN 50016:2002 Electrical apparatus for potentially explosive atmospheres - Pressurized apparatus "p"
    EN 50028:1987 Electrical apparatus for potentially explosive atmospheres - Encapsulation 'm'
    EN 50014:1997/A2:1999 ELECTRICAL APPARATUS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES - GENERAL REQUIREMENTS
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