Section 426-01: General terms | ![](/icons/ecblank.gif) |
| 426-01-01 | | equipment, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-01-02 | | Type of Protection, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-01-03 | | equipment grouping | ![](/icons/ecblank.gif) |
| 426-01-04 | | maximum surface temperature | ![](/icons/ecblank.gif) |
| 426-01-05 | | temperature class | ![](/icons/ecblank.gif) |
| 426-01-06 | | explosive atmosphere | ![](/icons/ecblank.gif) |
| 426-01-07 | | explosive gas atmosphere | ![](/icons/ecblank.gif) |
| 426-01-08 | | explosive dust atmosphere | ![](/icons/ecblank.gif) |
| 426-01-09 | | fixed equipment, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-01-10 | | personal equipment | ![](/icons/ecblank.gif) |
| 426-01-11 | | portable equipment | ![](/icons/ecblank.gif) |
| 426-01-12 | | transportable equipment | ![](/icons/ecblank.gif) |
| 426-01-13 | | Ex Component | ![](/icons/ecblank.gif) |
| 426-01-14 | | Ex Equipment | ![](/icons/ecblank.gif) |
| 426-01-15 | | EPL | ![](/icons/ecblank.gif) |
| 426-01-16 | | EPL Ma | ![](/icons/ecblank.gif) |
| 426-01-17 | | EPL Mb | ![](/icons/ecblank.gif) |
| 426-01-18 | | EPL Ga | ![](/icons/ecblank.gif) |
| 426-01-19 | | EPL Gb | ![](/icons/ecblank.gif) |
| 426-01-20 | | EPL Gc | ![](/icons/ecblank.gif) |
| 426-01-21 | | EPL Da | ![](/icons/ecblank.gif) |
| 426-01-22 | | EPL Db | ![](/icons/ecblank.gif) |
| 426-01-23 | | EPL Dc | ![](/icons/ecblank.gif) |
| 426-01-24 | | Level of Protection | ![](/icons/ecblank.gif) |
Section 426-02: Physical and chemical phenomena | ![](/icons/ecblank.gif) |
| 426-02-01 | | auto-ignition temperature | ![](/icons/ecblank.gif) |
| 426-02-05 | | explosive test mixture | ![](/icons/ecblank.gif) |
| 426-02-09 | | lower flammable limit | ![](/icons/ecblank.gif) |
| 426-02-10 | | upper flammable limit | ![](/icons/ecblank.gif) |
| 426-02-11 | | maximum experimental safe gap | ![](/icons/ecblank.gif) |
| 426-02-12 | | minimum igniting current | ![](/icons/ecblank.gif) |
| 426-02-14 | | flash point, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-02-15 | | pressure piling | ![](/icons/ecblank.gif) |
| 426-02-17 | | dust, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-02-18 | | combustible dust | ![](/icons/ecblank.gif) |
| 426-02-19 | | conductive dust | ![](/icons/ecblank.gif) |
| 426-02-20 | | minimum ignition temperature of a dust layer | ![](/icons/ecblank.gif) |
| 426-02-21 | | minimum ignition temperature of a dust cloud | ![](/icons/ecblank.gif) |
| 426-02-22 | | hybrid mixture | ![](/icons/ecblank.gif) |
| 426-02-23 | | pyrophoric substance | ![](/icons/ecblank.gif) |
| 426-02-24 | | firedamp | ![](/icons/ecblank.gif) |
| 426-02-25 | | combustible flyings, pl | ![](/icons/ecblank.gif) |
| 426-02-26 | | gas | ![](/icons/ecblank.gif) |
| 426-02-27 | | auto-ignition | ![](/icons/ecblank.gif) |
| 426-02-28 | | ignition delay time, <flammable material> | ![](/icons/ecblank.gif) |
| 426-02-29 | | mist, <flammable material> | ![](/icons/ecblank.gif) |
| 426-02-30 | | non-conductive dust | ![](/icons/ecblank.gif) |
| 426-02-31 | | vapour | ![](/icons/ecblank.gif) |
| 426-02-32 | | relative density, <of a gas or a vapour> | ![](/icons/ecblank.gif) |
| 426-02-33 | | flammable liquid | ![](/icons/ecblank.gif) |
| 426-02-34 | | flammable gas | ![](/icons/ecblank.gif) |
| 426-02-35 | | flammable vapour | ![](/icons/ecblank.gif) |
| 426-02-36 | | boiling point | ![](/icons/ecblank.gif) |
| 426-02-37 | | vapour pressure | ![](/icons/ecblank.gif) |
| 426-02-38 | | minimum ignition energy | ![](/icons/ecblank.gif) |
| 426-02-39 | | flammable limits, pl | ![](/icons/ecblank.gif) |
Section 426-03: Areas and zones | ![](/icons/ecblank.gif) |
| 426-03-01 | | hazardous area | ![](/icons/ecblank.gif) |
| 426-03-02 | | non-hazardous area | ![](/icons/ecblank.gif) |
| 426-03-03 | | Zone 0 | ![](/icons/ecblank.gif) |
| 426-03-04 | | Zone 1 | ![](/icons/ecblank.gif) |
| 426-03-05 | | Zone 2 | ![](/icons/ecblank.gif) |
| 426-03-06 | | source of release | ![](/icons/ecblank.gif) |
| 426-03-10 | | continuous grade of release | ![](/icons/ecblank.gif) |
| 426-03-11 | | primary grade of release | ![](/icons/ecblank.gif) |
| 426-03-12 | | secondary grade of release | ![](/icons/ecblank.gif) |
| 426-03-13 | | release rate | ![](/icons/ecblank.gif) |
| 426-03-14 | | ventilation | ![](/icons/ecblank.gif) |
| 426-03-16 | | flammable material | ![](/icons/ecblank.gif) |
| 426-03-21 | | extent of zone | ![](/icons/ecblank.gif) |
| 426-03-22 | | liquefied flammable gas | ![](/icons/ecblank.gif) |
| 426-03-23 | | Zone 20 | ![](/icons/ecblank.gif) |
| 426-03-24 | | Zone 21 | ![](/icons/ecblank.gif) |
| 426-03-25 | | Zone 22 | ![](/icons/ecblank.gif) |
| 426-03-26 | | dust containment | ![](/icons/ecblank.gif) |
| 426-03-27 | | source of dust release | ![](/icons/ecblank.gif) |
| 426-03-28 | | area, <classification of explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-03-29 | | abnormal operation | ![](/icons/ecblank.gif) |
| 426-03-30 | | zone, <classification of explosive atmospheres> | ![](/icons/ecblank.gif) |
Section 426-04: Construction of electrical apparatus (general) | ![](/icons/ecblank.gif) |
| 426-04-01 | | enclosure, <equipment for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-02 | | degree of protection of enclosure | ![](/icons/ecblank.gif) |
| 426-04-03 | | breathing device | ![](/icons/ecblank.gif) |
| 426-04-04 | | drain | ![](/icons/ecblank.gif) |
| 426-04-05 | | special fastener, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-09 | | ambient temperature, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-10 | | normal operation, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-11 | | duty cycle, <of load> | ![](/icons/ecblank.gif) |
| 426-04-12 | | clearance | ![](/icons/ecblank.gif) |
| 426-04-13 | | distance through casting compound | ![](/icons/ecblank.gif) |
| 426-04-14 | | distance through solid insulation | ![](/icons/ecblank.gif) |
| 426-04-15 | | creepage distance, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-16 | | distance under coating | ![](/icons/ecblank.gif) |
| 426-04-17 | | bushing, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-18 | | Cable Gland | ![](/icons/ecblank.gif) |
| 426-04-19 | | clamping device, <Cable Gland> | ![](/icons/ecblank.gif) |
| 426-04-20 | | compression element, <Cable Gland> | ![](/icons/ecblank.gif) |
| 426-04-21 | | sealing ring, <Cable Gland> | ![](/icons/ecblank.gif) |
| 426-04-22 | | Ex Equipment Cable Gland | ![](/icons/ecblank.gif) |
| 426-04-23 | | certificate | ![](/icons/ecblank.gif) |
| 426-04-24 | | conduit entry | ![](/icons/ecblank.gif) |
| 426-04-25 | | connection facilities, pl | ![](/icons/ecblank.gif) |
| 426-04-26 | | continuous operating temperature | ![](/icons/ecblank.gif) |
| 426-04-28 | | rated value, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-29 | | rating | ![](/icons/ecblank.gif) |
| 426-04-30 | | service temperature | ![](/icons/ecblank.gif) |
| 426-04-31 | | U, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-32 | | X, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-33 | | termination compartment | ![](/icons/ecblank.gif) |
| 426-04-34 | | dust-tight enclosure | ![](/icons/ecblank.gif) |
| 426-04-35 | | dust-protected enclosure | ![](/icons/ecblank.gif) |
| 426-04-38 | | countable fault | ![](/icons/ecblank.gif) |
| 426-04-39 | | non-countable fault | ![](/icons/ecblank.gif) |
| 426-04-40 | | infallible separation | ![](/icons/ecblank.gif) |
| 426-04-41 | | compound, <for encapsulation> | ![](/icons/ecblank.gif) |
| 426-04-42 | | safety device | ![](/icons/ecblank.gif) |
| 426-04-43 | | schedule drawing | ![](/icons/ecblank.gif) |
| 426-04-44 | | related drawing | ![](/icons/ecblank.gif) |
| 426-04-45 | | separation element | ![](/icons/ecblank.gif) |
| 426-04-46 | | protective device | ![](/icons/ecblank.gif) |
| 426-04-47 | | casting, <of a non-metallic compound> | ![](/icons/ecblank.gif) |
| 426-04-48 | | overvoltage category | ![](/icons/ecblank.gif) |
| 426-04-49 | | pollution degree | ![](/icons/ecblank.gif) |
| 426-04-50 | | rated insulation voltage | ![](/icons/ecblank.gif) |
| 426-04-51 | | recurring peak voltage | ![](/icons/ecblank.gif) |
| 426-04-52 | | galvanic isolation | ![](/icons/ecblank.gif) |
| 426-04-53 | | cable transit device, <Cable Gland> | ![](/icons/ecblank.gif) |
| 426-04-54 | | Ex Equipment Blanking Element | ![](/icons/ecblank.gif) |
| 426-04-55 | | Ex Equipment thread adapter | ![](/icons/ecblank.gif) |
| 426-04-56 | | malfunction, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-57 | | expected malfunction | ![](/icons/ecblank.gif) |
| 426-04-58 | | rare malfunction | ![](/icons/ecblank.gif) |
| 426-04-59 | | radio frequency, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-60 | | continuous transmission, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-61 | | pulsed transmission | ![](/icons/ecblank.gif) |
| 426-04-62 | | thermal initiation time | ![](/icons/ecblank.gif) |
| 426-04-63 | | threshold energy | ![](/icons/ecblank.gif) |
| 426-04-64 | | threshold power | ![](/icons/ecblank.gif) |
| 426-04-65 | | antenna gain, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-66 | | solid insulation, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-04-67 | | working voltage | ![](/icons/ecblank.gif) |
| 426-04-68 | | Ex Component Certificate | ![](/icons/ecblank.gif) |
| 426-04-69 | | Ex Equipment Certificate | ![](/icons/ecblank.gif) |
| 426-04-70 | | coating | ![](/icons/ecblank.gif) |
| 426-04-71 | | conformal coating | ![](/icons/ecblank.gif) |
| 426-04-72 | | factory connections, pl | ![](/icons/ecblank.gif) |
| 426-04-73 | | field-wiring connections, pl | ![](/icons/ecblank.gif) |
| 426-04-74 | | elastomer | ![](/icons/ecblank.gif) |
| 426-04-75 | | limiting temperature | ![](/icons/ecblank.gif) |
| 426-04-76 | | encapsulation, <explosive atmospheres> | ![](/icons/ecblank.gif) |
Section 426-06: Flameproof enclosure "D" | ![](/icons/ecblank.gif) |
| 426-06-01 | | flameproof enclosure "d" | ![](/icons/ecblank.gif) |
| 426-06-02 | | flameproof joint | ![](/icons/ecblank.gif) |
| 426-06-03 | | gap, <of a flameproof joint> | ![](/icons/ecblank.gif) |
| 426-06-05 | | width of flameproof joint | ![](/icons/ecblank.gif) |
| 426-06-07 | | distance, <flameproof joint> | ![](/icons/ecblank.gif) |
| 426-06-08 | | enclosure volume, <flameproof enclosure "d"> | ![](/icons/ecblank.gif) |
| 426-06-09 | | shaft, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-06-10 | | operating rod | ![](/icons/ecblank.gif) |
| 426-06-11 | | quick-acting door | ![](/icons/ecblank.gif) |
| 426-06-12 | | door fixed by threaded fasteners | ![](/icons/ecblank.gif) |
| 426-06-13 | | threaded door | ![](/icons/ecblank.gif) |
Section 426-07: Powder filling "q" | ![](/icons/ecblank.gif) |
| 426-07-01 | | powder filling "q" | ![](/icons/ecblank.gif) |
| 426-07-02 | | filling material, <powder filling> | ![](/icons/ecblank.gif) |
| 426-07-03 | | distance through filling material, <powder filling> | ![](/icons/ecblank.gif) |
Section 426-08: Increased safety "e" | ![](/icons/ecblank.gif) |
| 426-08-01 | | increased safety "e" | ![](/icons/ecblank.gif) |
| 426-08-03 | | time tE | ![](/icons/ecblank.gif) |
| 426-08-04 | | initial starting current | ![](/icons/ecblank.gif) |
| 426-08-05 | | normal service, <machines> | ![](/icons/ecblank.gif) |
| 426-08-06 | | rated dynamic current | ![](/icons/ecblank.gif) |
| 426-08-07 | | rated short-time thermal current | ![](/icons/ecblank.gif) |
| 426-08-08 | | resistance-heating device | ![](/icons/ecblank.gif) |
| 426-08-09 | | resistance-heating unit | ![](/icons/ecblank.gif) |
| 426-08-10 | | workpiece, <resistance-heating> | ![](/icons/ecblank.gif) |
| 426-08-11 | | temperature self-limiting characteristic | ![](/icons/ecblank.gif) |
| 426-08-12 | | stabilized design | ![](/icons/ecblank.gif) |
| 426-08-13 | | starting current ratio | ![](/icons/ecblank.gif) |
| 426-08-14 | | trace heater | ![](/icons/ecblank.gif) |
| 426-08-15 | | ferrule, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-08-16 | | light emitting diode | ![](/icons/ecblank.gif) |
| 426-08-17 | | LED module | ![](/icons/ecblank.gif) |
| 426-08-18 | | LED package | ![](/icons/ecblank.gif) |
| 426-08-19 | | resistance heating | ![](/icons/ecblank.gif) |
| 426-08-20 | | short-circuit current, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-08-21 | | stator winding | ![](/icons/ecblank.gif) |
| 426-08-22 | | terminal | ![](/icons/ecblank.gif) |
Section 426-09: Pressurization "p" | ![](/icons/ecblank.gif) |
| 426-09-01 | | pressurization "p" | ![](/icons/ecblank.gif) |
| 426-09-02 | | pressurized enclosure | ![](/icons/ecblank.gif) |
| 426-09-03 | | purging | ![](/icons/ecblank.gif) |
| 426-09-04 | | protective gas | ![](/icons/ecblank.gif) |
| 426-09-05 | | alarm, <pressurized enclosure "p"> | ![](/icons/ecblank.gif) |
| 426-09-06 | | containment system | ![](/icons/ecblank.gif) |
| 426-09-07 | | dilution | ![](/icons/ecblank.gif) |
| 426-09-08 | | dilution area | ![](/icons/ecblank.gif) |
| 426-09-09 | | enclosure volume, <pressurized enclosure "p"> | ![](/icons/ecblank.gif) |
| 426-09-10 | | flammable substance | ![](/icons/ecblank.gif) |
| 426-09-11 | | hermetically sealed device | ![](/icons/ecblank.gif) |
| 426-09-12 | | ignition-capable equipment | ![](/icons/ecblank.gif) |
| 426-09-13 | | indicator, <pressurization "p"> | ![](/icons/ecblank.gif) |
| 426-09-14 | | internal source of release | ![](/icons/ecblank.gif) |
| 426-09-15 | | leakage compensation | ![](/icons/ecblank.gif) |
| 426-09-16 | | overpressure | ![](/icons/ecblank.gif) |
| 426-09-17 | | pressurization system | ![](/icons/ecblank.gif) |
| 426-09-18 | | protective gas supply | ![](/icons/ecblank.gif) |
| 426-09-19 | | static pressurization | ![](/icons/ecblank.gif) |
| 426-09-20 | | Level of Protection "pxb" | ![](/icons/ecblank.gif) |
| 426-09-21 | | Level of Protection "pyb" | ![](/icons/ecblank.gif) |
| 426-09-22 | | Level of Protection "pzc" | ![](/icons/ecblank.gif) |
| 426-09-23 | | Type of Protection "pD" | ![](/icons/ecblank.gif) |
Section 426-10: Oil immersion "o" | ![](/icons/ecblank.gif) |
| 426-10-01 | | oil immersion "o" | ![](/icons/ecblank.gif) |
| 426-10-02 | | protective liquid | ![](/icons/ecblank.gif) |
| 426-10-03 | | sealed equipment | ![](/icons/ecblank.gif) |
| 426-10-04 | | non-sealed equipment | ![](/icons/ecblank.gif) |
| 426-10-05 | | maximum permissible protective liquid level | ![](/icons/ecblank.gif) |
| 426-10-06 | | minimum permissible protective liquid level | ![](/icons/ecblank.gif) |
Section 426-11: Intrinsically safe and associated intrinsically safe electrical apparatus "i" | ![](/icons/ecblank.gif) |
| 426-11-01 | | intrinsically safe circuit | ![](/icons/ecblank.gif) |
| 426-11-02 | | intrinsically safe apparatus | ![](/icons/ecblank.gif) |
| 426-11-03 | | associated apparatus | ![](/icons/ecblank.gif) |
| 426-11-09 | | simple apparatus | ![](/icons/ecblank.gif) |
| 426-11-10 | | diode safety barrier | ![](/icons/ecblank.gif) |
| 426-11-11 | | spark test apparatus, <intrinsically safe circuits> | ![](/icons/ecblank.gif) |
| 426-11-12 | | fault, <intrinsic safety "i"> | ![](/icons/ecblank.gif) |
| 426-11-15 | | maximum external capacitance | ![](/icons/ecblank.gif) |
| 426-11-16 | | maximum external inductance | ![](/icons/ecblank.gif) |
| 426-11-17 | | maximum input current | ![](/icons/ecblank.gif) |
| 426-11-18 | | maximum input power | ![](/icons/ecblank.gif) |
| 426-11-19 | | maximum input voltage | ![](/icons/ecblank.gif) |
| 426-11-20 | | maximum internal capacitance | ![](/icons/ecblank.gif) |
| 426-11-21 | | maximum internal inductance | ![](/icons/ecblank.gif) |
| 426-11-22 | | maximum output current | ![](/icons/ecblank.gif) |
| 426-11-23 | | maximum output power | ![](/icons/ecblank.gif) |
| 426-11-24 | | maximum output voltage | ![](/icons/ecblank.gif) |
| 426-11-25 | | maximum RMS AC or DC voltage | ![](/icons/ecblank.gif) |
| 426-11-26 | | maximum external inductance to resistance ratio | ![](/icons/ecblank.gif) |
| 426-11-27 | | maximum internal inductance to resistance ratio | ![](/icons/ecblank.gif) |
| 426-11-28 | | infallible component | ![](/icons/ecblank.gif) |
| 426-11-32 | | internal wiring | ![](/icons/ecblank.gif) |
| 426-11-33 | | intrinsically safe electrical system with certificate | ![](/icons/ecblank.gif) |
| 426-11-34 | | intrinsically safe electrical system without certificate | ![](/icons/ecblank.gif) |
| 426-11-35 | | descriptive system document | ![](/icons/ecblank.gif) |
| 426-11-36 | | system designer | ![](/icons/ecblank.gif) |
| 426-11-37 | | maximum cable capacitance | ![](/icons/ecblank.gif) |
| 426-11-38 | | maximum cable inductance | ![](/icons/ecblank.gif) |
| 426-11-39 | | maximum cable inductance to resistance ratio | ![](/icons/ecblank.gif) |
| 426-11-40 | | linear power supply | ![](/icons/ecblank.gif) |
| 426-11-41 | | non-linear power supply | ![](/icons/ecblank.gif) |
| 426-11-42 | | intrinsic safety "i" | ![](/icons/ecblank.gif) |
| 426-11-43 | | intrinsic safety "iD" | ![](/icons/ecblank.gif) |
| 426-11-44 | | protective extra-low voltage system | ![](/icons/ecblank.gif) |
| 426-11-45 | | safety extra-low voltage system | ![](/icons/ecblank.gif) |
| 426-11-46 | | control drawing | ![](/icons/ecblank.gif) |
| 426-11-47 | | entity concept | ![](/icons/ecblank.gif) |
| 426-11-48 | | fuse rating | ![](/icons/ecblank.gif) |
| 426-11-49 | | moulding, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-11-50 | | shunt safety assembly | ![](/icons/ecblank.gif) |
| 426-11-51 | | live maintenance | ![](/icons/ecblank.gif) |
| 426-11-52 | | infallible connections, pl | ![](/icons/ecblank.gif) |
| 426-11-53 | | FISCO | ![](/icons/ecblank.gif) |
Section 426-12: Encapsulation "m" | ![](/icons/ecblank.gif) |
| 426-12-01 | | encapsulation "m" | ![](/icons/ecblank.gif) |
| 426-12-03 | | temperature range of the compound | ![](/icons/ecblank.gif) |
| 426-12-06 | | free surface | ![](/icons/ecblank.gif) |
| 426-12-09 | | switching contact | ![](/icons/ecblank.gif) |
| 426-12-10 | | adhesion | ![](/icons/ecblank.gif) |
| 426-12-11 | | encapsulation "mD" | ![](/icons/ecblank.gif) |
Section 426-13: Type of protection "n" | ![](/icons/ecblank.gif) |
| 426-13-01 | | Type of Protection "n" | ![](/icons/ecblank.gif) |
| 426-13-02 | | non-sparking device "nA" | ![](/icons/ecblank.gif) |
| 426-13-03 | | encapsulated device "nC" | ![](/icons/ecblank.gif) |
| 426-13-04 | | enclosed-break device "nC" | ![](/icons/ecblank.gif) |
| 426-13-05 | | hermetically sealed device "nC" | ![](/icons/ecblank.gif) |
| 426-13-06 | | non-incendive component "nC" | ![](/icons/ecblank.gif) |
| 426-13-07 | | sealed device "nC" | ![](/icons/ecblank.gif) |
| 426-13-08 | | energy-limited apparatus "nL" | ![](/icons/ecblank.gif) |
| 426-13-09 | | associated energy-limited apparatus "[nL]" or "[Ex nL]" | ![](/icons/ecblank.gif) |
| 426-13-10 | | self protected energy-limited apparatus "nA nL" | ![](/icons/ecblank.gif) |
| 426-13-11 | | restricted-breathing enclosure "nR" | ![](/icons/ecblank.gif) |
| 426-13-15 | | test port | ![](/icons/ecblank.gif) |
| 426-13-16 | | normally sparking device | ![](/icons/ecblank.gif) |
Section 426-14: Inspection and maintenance | ![](/icons/ecblank.gif) |
| 426-14-01 | | maintenance, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-14-02 | | inspection, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-14-03 | | visual inspection | ![](/icons/ecblank.gif) |
| 426-14-04 | | close inspection | ![](/icons/ecblank.gif) |
| 426-14-05 | | detailed inspection | ![](/icons/ecblank.gif) |
| 426-14-06 | | initial inspection | ![](/icons/ecblank.gif) |
| 426-14-07 | | periodic inspection | ![](/icons/ecblank.gif) |
| 426-14-08 | | sample inspection | ![](/icons/ecblank.gif) |
| 426-14-09 | | continuous supervision | ![](/icons/ecblank.gif) |
| 426-14-10 | | skilled personnel | ![](/icons/ecblank.gif) |
| 426-14-11 | | technical person with executive function | ![](/icons/ecblank.gif) |
Section 426-15: Repair and overhaul | ![](/icons/ecblank.gif) |
| 426-15-01 | | serviceable condition | ![](/icons/ecblank.gif) |
| 426-15-02 | | repair, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-15-04 | | component part | ![](/icons/ecblank.gif) |
| 426-15-05 | | reclamation | ![](/icons/ecblank.gif) |
| 426-15-06 | | modification, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-15-07 | | manufacturer, <explosive atmospheres – repair and overhaul> | ![](/icons/ecblank.gif) |
| 426-15-08 | | user, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-15-09 | | repair facility | ![](/icons/ecblank.gif) |
| 426-15-10 | | certification | ![](/icons/ecblank.gif) |
| 426-15-12 | | copy winding | ![](/icons/ecblank.gif) |
| 426-15-13 | | alteration | ![](/icons/ecblank.gif) |
| 426-15-14 | | competence | ![](/icons/ecblank.gif) |
| 426-15-15 | | Ex competent person | ![](/icons/ecblank.gif) |
| 426-15-16 | | examination, <of a person> | ![](/icons/ecblank.gif) |
| 426-15-17 | | overhaul | ![](/icons/ecblank.gif) |
| 426-15-18 | | qualification, <of a person> | ![](/icons/ecblank.gif) |
Section 426-16: Protection by enclosure (dust) "tD" | ![](/icons/ecblank.gif) |
| 426-16-01 | | dust ignition protection "tD" | ![](/icons/ecblank.gif) |
| 426-16-02 | | dust ignition protection by enclosure "t" | ![](/icons/ecblank.gif) |
Section 426-20: Trace heating | ![](/icons/ecblank.gif) |
| 426-20-01 | | ambient temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-02 | | branch circuit, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-03 | | cold lead, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-04 | | end termination, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-05 | | power termination, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-06 | | tee, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-07 | | dead leg, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-08 | | design loading, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-09 | | factory-fabricated trace heater | ![](/icons/ecblank.gif) |
| 426-20-10 | | field-assembled trace heater | ![](/icons/ecblank.gif) |
| 426-20-11 | | heat loss, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-12 | | heat sink, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-13 | | heat-transfer aids, <trace heating> pl | ![](/icons/ecblank.gif) |
| 426-20-14 | | heating pad, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-15 | | heating panel, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-16 | | high-limit temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-17 | | maximum ambient temperature | ![](/icons/ecblank.gif) |
| 426-20-19 | | metallic covering, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-20 | | minimum ambient temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-21 | | operating voltage, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-22 | | overjacket, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-23 | | power density, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-24 | | rated output, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-26 | | series trace heater, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-27 | | sheath, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-28 | | sheath temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-29 | | stabilized design, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-30 | | start-up current, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-31 | | system documentation, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-33 | | temperature control device, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-34 | | temperature controller, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-35 | | temperature limiting device, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-36 | | thermal insulation, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-37 | | trace heater | ![](/icons/ecblank.gif) |
| 426-20-38 | | trace heater unit | ![](/icons/ecblank.gif) |
| 426-20-39 | | trace heating | ![](/icons/ecblank.gif) |
| 426-20-40 | | weather barrier, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-41 | | workpiece, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-42 | | controlled design | ![](/icons/ecblank.gif) |
| 426-20-43 | | electrically conductive covering | ![](/icons/ecblank.gif) |
| 426-20-44 | | temperature sensor | ![](/icons/ecblank.gif) |
| 426-20-45 | | integral components, pl | ![](/icons/ecblank.gif) |
| 426-20-46 | | maximum continuous exposure temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-47 | | maximum maintain temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-48 | | maximum intermittent exposure temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-49 | | maintain temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-50 | | maximum sheath temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-51 | | maximum withstand temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-52 | | minimum installation temperature, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-53 | | MI trace heater, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-54 | | outdoor exposure, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-55 | | parallel trace heater, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-56 | | rated voltage, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-57 | | trace heating system, <trace heating> | ![](/icons/ecblank.gif) |
| 426-20-58 | | trace ratio, <trace heating> | ![](/icons/ecblank.gif) |
Section 426-21: Installations in explosive atmospheres | ![](/icons/ecblank.gif) |
| 426-21-01 | | radio-frequency identification | ![](/icons/ecblank.gif) |
| 426-21-02 | | verification dossier | ![](/icons/ecblank.gif) |
| 426-21-03 | | competent body | ![](/icons/ecblank.gif) |
Section 426-22: Caplights | ![](/icons/ecblank.gif) |
| 426-22-01 | | caplight | ![](/icons/ecblank.gif) |
| 426-22-02 | | light source, <caplight> | ![](/icons/ecblank.gif) |
| 426-22-03 | | filament lamp, <caplight> | ![](/icons/ecblank.gif) |
| 426-22-04 | | useful working period | ![](/icons/ecblank.gif) |
Section 426-23: Optical radiation in explosive atmospheres | ![](/icons/ecblank.gif) |
| 426-23-01 | | absorption, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-23-02 | | beam diameter | ![](/icons/ecblank.gif) |
| 426-23-03 | | beam strength | ![](/icons/ecblank.gif) |
| 426-23-04 | | core, <of an optical fibre> | ![](/icons/ecblank.gif) |
| 426-23-05 | | cladding | ![](/icons/ecblank.gif) |
| 426-23-06 | | fibre bundle | ![](/icons/ecblank.gif) |
| 426-23-07 | | fibre optic terminal device | ![](/icons/ecblank.gif) |
| 426-23-08 | | inherently safe optical radiation "op is" | ![](/icons/ecblank.gif) |
| 426-23-09 | | irradiance | ![](/icons/ecblank.gif) |
| 426-23-10 | | light | ![](/icons/ecblank.gif) |
| 426-23-11 | | optical fibre | ![](/icons/ecblank.gif) |
| 426-23-12 | | optical cable | ![](/icons/ecblank.gif) |
| 426-23-13 | | radiant power | ![](/icons/ecblank.gif) |
| 426-23-14 | | optical radiation | ![](/icons/ecblank.gif) |
| 426-23-15 | | protected optical fibre cable | ![](/icons/ecblank.gif) |
| 426-23-16 | | radiant exposure | ![](/icons/ecblank.gif) |
| 426-23-17 | | protected optical radiation "op pr" | ![](/icons/ecblank.gif) |
| 426-23-18 | | optical system with interlock "op sh" | ![](/icons/ecblank.gif) |
Section 426-24: Combustible gas detection | ![](/icons/ecblank.gif) |
| 426-24-01 | | alarm set point | ![](/icons/ecblank.gif) |
| 426-24-02 | | alarm signal | ![](/icons/ecblank.gif) |
| 426-24-03 | | alarm-only equipment | ![](/icons/ecblank.gif) |
| 426-24-04 | | albedo | ![](/icons/ecblank.gif) |
| 426-24-05 | | ambient air, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-06 | | aspirated equipment | ![](/icons/ecblank.gif) |
| 426-24-07 | | beam blocked signal | ![](/icons/ecblank.gif) |
| 426-24-08 | | catalytic sensor | ![](/icons/ecblank.gif) |
| 426-24-09 | | clean air, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-10 | | concentration, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-11 | | continuous duty equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-12 | | continuous sensing, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-13 | | diffusion equipment | ![](/icons/ecblank.gif) |
| 426-24-14 | | dose, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-15 | | drift, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-16 | | electrochemical sensor | ![](/icons/ecblank.gif) |
| 426-24-17 | | flammable range | ![](/icons/ecblank.gif) |
| 426-24-18 | | fault signal | ![](/icons/ecblank.gif) |
| 426-24-19 | | final indication, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-20 | | flame ionization detector | ![](/icons/ecblank.gif) |
| 426-24-21 | | flame temperature analyzer | ![](/icons/ecblank.gif) |
| 426-24-22 | | functional check, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-23 | | gas calibration cell, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-24 | | indicating device, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-25 | | infrared absorption sensor, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-26 | | inhibition signal, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-27 | | initial calibration, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-28 | | integral concentration, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-29 | | integral sensor, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-30 | | intermittent sensing, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-31 | | latching alarm, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-32 | | measuring point, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-33 | | meteorological optical range, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-34 | | open path, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-35 | | optical axis, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-36 | | optical path, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-37 | | paramagnetic oxygen detector, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-38 | | peripheral equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-39 | | photo ionisation detector, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-40 | | point detection equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-41 | | poisons, <gas detection> pl | ![](/icons/ecblank.gif) |
| 426-24-42 | | portable equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-43 | | personal equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-44 | | recalibration, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-45 | | receiver, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-46 | | recovery time, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-47 | | release rate | ![](/icons/ecblank.gif) |
| 426-24-48 | | remote sensor, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-49 | | retroreflector, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-50 | | sample system, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-51 | | sample line, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-52 | | sampling point, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-53 | | sampling probe, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-54 | | selectivity, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-55 | | semiconductor sensor, <gas detectors> | ![](/icons/ecblank.gif) |
| 426-24-56 | | sensing element, <gas detectors> | ![](/icons/ecblank.gif) |
| 426-24-57 | | sensitivity, <gas detectors> | ![](/icons/ecblank.gif) |
| 426-24-58 | | sensor, <gas detectors> | ![](/icons/ecblank.gif) |
| 426-24-59 | | single-point sensor, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-60 | | field calibration kit | ![](/icons/ecblank.gif) |
| 426-24-61 | | special state, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-62 | | spot-reading equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-63 | | stabilization, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-64 | | separate gas detection control unit | ![](/icons/ecblank.gif) |
| 426-24-65 | | stand-alone gas-detection equipment | ![](/icons/ecblank.gif) |
| 426-24-66 | | thermal conductivity sensor, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-67 | | time of response, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-68 | | toxic gas | ![](/icons/ecblank.gif) |
| 426-24-69 | | transceiver, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-70 | | transmitter, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-71 | | volume fraction | ![](/icons/ecblank.gif) |
| 426-24-72 | | warm-up time, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-73 | | zero gas, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-74 | | automatically aspirated equipment, <gas detection> | ![](/icons/ecblank.gif) |
| 426-24-75 | | mask for calibration and test | ![](/icons/ecblank.gif) |
| 426-24-76 | | equipment with integral sensor(s), <gas detection> | ![](/icons/ecblank.gif) |
Section 426-25: Electrostatics | ![](/icons/ecblank.gif) |
| 426-25-01 | | conductive, <electrostatically> adj | ![](/icons/ecblank.gif) |
| 426-25-02 | | dissipative, <electrostatically> adj | ![](/icons/ecblank.gif) |
| 426-25-03 | | insulating, adj | ![](/icons/ecblank.gif) |
| 426-25-04 | | isolated conductor | ![](/icons/ecblank.gif) |
| 426-25-05 | | leakage resistance | ![](/icons/ecblank.gif) |
| 426-25-06 | | surface resistance, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-25-07 | | surface resistivity, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-25-08 | | volume resistivity, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-25-09 | | conductivity, <for explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-25-10 | | relaxation time | ![](/icons/ecblank.gif) |
| 426-25-11 | | electrostatic shock | ![](/icons/ecblank.gif) |
| 426-25-12 | | multiphase liquid | ![](/icons/ecblank.gif) |
| 426-25-13 | | contaminated liquid, <electrostatics> | ![](/icons/ecblank.gif) |
| 426-25-14 | | conductor, <electrostatics> | ![](/icons/ecblank.gif) |
| 426-25-15 | | conductive footware | ![](/icons/ecblank.gif) |
| 426-25-16 | | dissipative footware | ![](/icons/ecblank.gif) |
| 426-25-17 | | dissipative clothing | ![](/icons/ecblank.gif) |
Section 426-26: Special protection "s" | ![](/icons/ecblank.gif) |
| 426-26-01 | | special protection "s" | ![](/icons/ecblank.gif) |
| 426-26-02 | | independent verifier | ![](/icons/ecblank.gif) |
Section 426-27: Explosive atmospheres – Application of quality systems | ![](/icons/ecblank.gif) |
| 426-27-01 | | manufacturer, <explosive atmospheres> | ![](/icons/ecblank.gif) |
| 426-27-02 | | contract | ![](/icons/ecblank.gif) |
| 426-27-03 | | customer complaint | ![](/icons/ecblank.gif) |
| 426-27-04 | | product, <Ex Equipment> | ![](/icons/ecblank.gif) |
| 426-27-05 | | protective system | ![](/icons/ecblank.gif) |
| 426-27-06 | | technical documentation | ![](/icons/ecblank.gif) |
| 426-27-07 | | manufacturer's documentation | ![](/icons/ecblank.gif) |
| 426-27-08 | | body responsible for verification | ![](/icons/ecblank.gif) |
Section 426-28: Non-electrical equipment (General) | ![](/icons/ecblank.gif) |
| 426-28-01 | | effective ignition source | ![](/icons/ecblank.gif) |
| 426-28-02 | | equipment-related ignition source | ![](/icons/ecblank.gif) |
| 426-28-03 | | malfunction, <non-electrical equipment> | ![](/icons/ecblank.gif) |
| 426-28-04 | | maximum possible potential energy | ![](/icons/ecblank.gif) |
| 426-28-05 | | maximum surface temperature, <non-electrical equipment> | ![](/icons/ecblank.gif) |
| 426-28-06 | | non-electrical equipment | ![](/icons/ecblank.gif) |
| 426-28-07 | | normal operation, <non-electrical equipment> | ![](/icons/ecblank.gif) |
| 426-28-08 | | possible ignition source | ![](/icons/ecblank.gif) |
| 426-28-09 | | potential ignition source | ![](/icons/ecblank.gif) |
| 426-28-10 | | automatic control measure | ![](/icons/ecblank.gif) |
| 426-28-11 | | control of ignition source "b" | ![](/icons/ecblank.gif) |
| 426-28-12 | | constructional safety "c" | ![](/icons/ecblank.gif) |
| 426-28-13 | | liquid immersion "k" | ![](/icons/ecblank.gif) |
| 426-28-14 | | equipment with a sealed enclosure, <non-electrical equipment> | ![](/icons/ecblank.gif) |
| 426-28-15 | | equipment with a vented enclosure, <non-electrical equipment> | ![](/icons/ecblank.gif) |
| 426-28-16 | | Ignition-prevention device | ![](/icons/ecblank.gif) |
| 426-28-17 | | manual control measure | ![](/icons/ecblank.gif) |
| 426-28-18 | | open equipment | ![](/icons/ecblank.gif) |
Section 426-29: Non-electrical equipment – Mining | ![](/icons/ecblank.gif) |
| 426-29-01 | | protection against firedamp explosions | ![](/icons/ecblank.gif) |
| 426-29-02 | | machinery | ![](/icons/ecblank.gif) |
| 426-29-03 | | hydraulic fluids, pl | ![](/icons/ecblank.gif) |
| ![](/icons/ecblank.gif) |