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Area: 426: Equipment for explosive atmospheres           Index language:

Hide details for [<u>Section 426-01: General terms</u>]Section 426-01: General terms
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electrical apparatus for explosive atmospheres
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type of protection
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apparatus grouping
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maximum surface temperature
426-01-05
temperature class
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explosive atmosphere
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explosive gas atmosphere
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explosive dust atmosphere
Hide details for [<u>Section 426-02: Physical and chemical phenomena</u>]Section 426-02: Physical and chemical phenomena
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ignition temperature of an explosive gas atmosphere
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explosive test mixture
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most easily ignitable mixture
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most explosive mixture
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most incendive mixture
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Lower Explosive Limit
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Upper Explosive Limit
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Maximum Experimental Safe Gap
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Minimum Igniting Current
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explosion (of an explosive atmosphere)
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flash point
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pressure piling
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minimum igniting voltage
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dust
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combustible dust
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conductive dust
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minimum ignition temperature of a dust layer
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minimum ignition temperature of a dust cloud
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hybrid mixture
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pyrophoric substance
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firedamp
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combustible flyings
Hide details for [<u>Section 426-03: Areas and zones</u>]Section 426-03: Areas and zones
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hazardous area
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non-hazardous area
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zone 0
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zone 1
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zone 2
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source of release
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natural ventilation
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general artificial ventilation
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local artificial ventilation
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continuous grade of release
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primary grade of release
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secondary grade of release
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release rate
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ventilation
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relative density (of a gas or a vapour)
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flammable material
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flammable liquid
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flammable gas or vapour
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boiling point
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vapour pressure
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extent of zone
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liquefied flammable gas
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zone 20
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zone 21
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zone 22
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dust containment
426-03-27
source of dust release
Hide details for [<u>Section 426-04: Construction of electrical apparatus (general)</u>]Section 426-04: Construction of electrical apparatus (general)
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enclosure (of equipment for explosive atmospheres)
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degree of protection of enclosure
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breathing device
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drain
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special fastener
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direct entry (into electrical apparatus)
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indirect entry (into electrical apparatus)
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ambient temperature
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normal operation
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duty cycle
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clearance
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distance through casting compound
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distance through solid insulation
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creepage distance
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distance under coating
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bushing
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cable gland
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clamping device (of a cable gland)
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compression element (of a cable gland)
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sealing ring (of a cable gland)
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Ex cable gland
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certificate
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conduit entry
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connection facilities
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Continuous Operating Temperature
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Ex component
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rated value
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rating
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service temperature
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symbol “U”
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symbol “X”
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terminal compartment
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dust-tight enclosure
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dust-protected enclosure
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caplight
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useful working period (of caplights)
Hide details for [<u>Section 426-05: Tests of electrical apparatus</u>]Section 426-05: Tests of electrical apparatus
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type test
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routine test
Hide details for [<u>Section 426-06: Flameproof enclosure "D"</u>]Section 426-06: Flameproof enclosure "D"
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flameproof enclosure "d"
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flameproof joint
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gap (of a flameproof joint)
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maximum permitted gap
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width of flameproof joint
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flameproof bushing
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distance
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volume (of flameproof enclosure)
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shaft
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operating rod
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quick-acting door or cover
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door or cover fixed by threaded fasteners
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threaded door or cover
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Ex blanking element
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Ex thread adapter
Hide details for [<u>Section 426-07: Powder filling "q"</u>]Section 426-07: Powder filling "q"
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powder filling “q”
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filling material (powder)
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distance through filling material
Hide details for [<u>Section 426-08: Increased safety "e"</u>]Section 426-08: Increased safety "e"
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increased safety "e"
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limiting temperature (of increased safety electrical apparatus)
426-08-03
time
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initial starting current
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normal service (of a motor)
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rated dynamic current
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rated short-time thermal current
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resistance-heating device
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resistance-heating unit
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workpiece
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self-limiting property
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stabilized design
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starting current ratio
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trace heating
Hide details for [<u>Section 426-09: Pressurization "p"</u>]Section 426-09: Pressurization "p"
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pressurization
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pressurized enclosure
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purging
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protective gas
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alarm
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containment system
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dilution
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dilution area
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enclosure volume (of a pressurized enclosure)
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flammable substance
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hermetically sealed device
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Ignition-Capable Apparatus
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indicator
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internal source of release
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leakage compensation
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overpressure
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pressurization system
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protective gas supply
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static pressurization
426-09-20
type px pressurizing
426-09-21
type py pressurizing
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type pz pressurizing
Hide details for [<u>Section 426-10: Oil immersion "o"</u>]Section 426-10: Oil immersion "o"
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oil immersion "o"
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protective liquid
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sealed apparatus
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non-sealed apparatus
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maximum permissible protective liquid level
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minimum permissible protective liquid level
Hide details for [<u>Section 426-11: Intrinsically safe and associated intrinsically safe electrical apparatus "i"</u>]Section 426-11: Intrinsically safe and associated intrinsically safe electrical apparatus "i"
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intrinsically safe circuit
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intrinsically safe electrical apparatus
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associated electrical apparatus
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intrinsically safe electrical system
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simple apparatus
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diode safety barrier
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spark test apparatus (for intrinsically-safe circuits)
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fault
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countable fault
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non-countable fault
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maximum external capacitance
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maximum external inductance
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maximum input current
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maximum input power
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maximum input voltage
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maximum internal capacitance
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maximum internal inductance
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maximum output current
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maximum output power
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maximum output voltage
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maximum r.m.s. AC or DC voltage
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maximum external inductance to resistance ratio
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maximum internal inductance to resistance ratio
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infallible component
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infallible assembly of components
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infallible separation
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infallible separation or insulation
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internal wiring
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certified intrinsically safe electrical system
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uncertified intrinsically safe electrical system
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descriptive system document
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system designer
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maximum cable capacitance
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maximum cable inductance
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maximum cable inductance to resistance ratio
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linear power supply
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non-linear power supply
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intrinsic safety “i” 
Hide details for [<u>Section 426-12: Encapsulation "m"</u>]Section 426-12: Encapsulation "m"
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encapsulation “m”
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compound
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temperature range of the compound
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Continuous Operating Temperature of the compound
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encapsulation
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free surface
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void
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free space
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switching contact
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adhesion
Hide details for [<u>Section 426-13: Type of protection "n"</u>]Section 426-13: Type of protection "n"
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type of protection "n"
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non-sparking device “nA”
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encapsulated device “nC”
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enclosed-break device “nC”
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hermetically-sealed device “nC”
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non-incendive component “nC”
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sealed device “nC”
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energy-limited apparatus “nL”
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associated energy-limited apparatus “[nL]” or “[Ex nL]”
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self protected energy-limited apparatus “nA nL”
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restricted-breathing enclosure “nR”
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cable sealing box
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sealing device
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energy limitation
Hide details for [<u>Section 426-14: Inspection and maintenance</u>]Section 426-14: Inspection and maintenance
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maintenance
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inspection
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visual inspection
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close inspection
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detailed inspection
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initial inspection
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periodic inspection
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sample inspection
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continuous supervision
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skilled personnel
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technical person with executive function
Hide details for [<u>Section 426-15: Repair and overhaul</u>]Section 426-15: Repair and overhaul
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serviceable condition
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repair
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maintenance
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component part
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reclamation
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modification
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manufacturer
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user
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repairer
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certification
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certificate references
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copy winding
Hide details for [<u>Section 426-16: Protection by enclosure (dust) "tD"</u>]Section 426-16: Protection by enclosure (dust) "tD"
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dust ignition protection type “tD”
Hide details for [<u>Section 426-17: Protection by pressurization (dust) "pD"</u>]Section 426-17: Protection by pressurization (dust) "pD"
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type of protection "pD"
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pressurization (dust)
Hide details for [<u>Section 426-18: Protection by encapsulation (dust) "mD"</u>]Section 426-18: Protection by encapsulation (dust) "mD"
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encapsulation "mD"
Hide details for [<u>Section 426-19: Protection by intrinsic safety (dust) "iD"</u>]Section 426-19: Protection by intrinsic safety (dust) "iD"
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intrinsic safety “iD”
Hide details for [<u>Section 426-20: Trace heating</u>]Section 426-20: Trace heating
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ambient temperature (trace heating)
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branch circuit
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cold lead
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end termination
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power termination
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tee
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dead leg
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design loading
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factory-fabricated
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field-assembled
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heat loss
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heat sink
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heat-transfer aids
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heating pad
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heating panel
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high-limit temperature
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maximum ambient temperature
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maximum withstand temperature
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metallic covering
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minimum ambient temperature
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operating voltage
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overjacket
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power density
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rated output
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rated voltage, <for trace heaters>
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series trace heater(s)
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sheath (of a trace heater)
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sheath temperature
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stabilized design
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start-up current
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system documentation (of a trace heating system)
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temperature alarm device
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temperature control device
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temperature controller
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temperature limiting device
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thermal insulation (of a trace heating system)
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trace heater
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trace heater unit
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trace heating
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weather barrier
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workpiece (trace heater)


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