This part of IEC 60079 specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection, “n” intended for use in explosive gas atmospheres.This part is applicable to non-sparking electrical apparatus and also to electrical apparatus with parts or circuits producing arcs or sparks or having hot surfaces which, if not protected in one of the ways specified in this standard, could be capable of igniting a surrounding explosive gas atmosphere. This standard describes several different methods by which this can be achieved which may be combined with other methods described in IEC 60079-0. This part supplements the general requirements in IEC 60079-0.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 10<\/td>\n | Scope <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Normative references <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | General Apparatus grouping and temperature classification <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Potential ignition sources Temperatures Environmental influences Ambient temperature External source of heating or cooling Service temperature Maximum surface temperature Determination of maximum surface temperature Limitation of maximum surface temperature Surface temperature and ignition temperature <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Small components Requirements for electrical apparatus General Mechanical strength of apparatus Opening times Circulating currents Gasket retention Degree of protection of enclosure (IP) Minimum degree of protection <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Degree of protection provided by installation Clearances, creepage distances and separations General Determination of working voltage Conformal coating <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Comparative tracking index (CTI) Measurement of creepage and clearance <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Compound filled cable sealing boxes <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Electric strength Insulation from earth or frame Insulation between conductive parts <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Non-metallic enclosures and non-metallic parts of enclosures General Thermal endurance Electrostatic charges on external non-metallic materials of Threaded holes Thermal shock Resistance to light Enclosures containing light metals Material composition Threaded holes <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Fasteners General Special fasteners Interlocking devices Bushings Materials used for cementing Ex components Type of protection \u201cn\u201d Mounting <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Internal mounting External mounting Connection facilities and terminal compartments General Connection for external conductors Connection facilities Terminals <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Permanently connected cable, provided with loose leads Conductor accommodation Cable glands Internal connection facilities Connection facilities for earthing or bonding conductors Entries into enclosures <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Supplementary requirements for non-sparking electrical machi General Machine enclosure Terminal boxes Conduit stopping boxes, cable sealing and dividing boxes Connection facilities for external conductors <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Neutral point connections Radial air gap Ventilation systems <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Bearing seals and shaft seals Non-rubbing seals and labyrinths Rubbing seals Rotor cages Rotor cages built from bars connected to end rings Cast rotor cages Assessment for possible air gap sparking <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Surface temperature limitation Prevention of thermal ignition <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Operation with a frequency convertor or a non-sinusoidal sup Type test methods Type test Alternative type test by calculation Additional requirements for machines with rated voltage grea General <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Assessment and test \u201cAs new\u201d condition High-voltage rated machines Potential incendivity of the stator winding insulation syste <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Supplementary requirements for switchgear Supplementary requirements for non-sparking fuses and fuse a \u2003Fuses <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Temperature class of an apparatus \u2003 Fuse mounting Fuse enclosures Replacement fuse identification Supplementary requirements for non-sparking plugs and socket Plugs and sockets for external connections <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Maintaining degree of protection Plugs and sockets for internal connections Sockets that do not have plugs inserted in normal operation Supplementary requirements for non-sparking luminaires General <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Construction General Enclosure of lamp Mounting arrangement Lampholders General Bayonet non-sparking lampholders <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Screw non-sparking lampholders Bi-pin non-sparking lampholders Auxiliaries General Glow-type starters Electronic starters and ignitors <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Starter holders Ballasts Reflectors Creepage distances and clearances <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Terminals General\u2003 Looping connections\u2003 Internal connections <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Screw type lampholder polarity External and internal wiring <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Endurance tests and thermal tests General Thermal test (normal operation) Thermal test (abnormal conditions) Temperatures except for windings \u2003Temperatures for windings Surface temperatures Restricted-breathing luminaires Other luminaires Illuminated surfaces <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Resistance to dust and moisture Insulation resistance and electric strength Other apparatus containing light sources Supplementary requirements for apparatus incorporating non-s Categorization of cells and batteries \u2003Type 1 cells and batteries Type 2 cells and batteries <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | Type 3 cells and batteries General requirements for cells and batteries of types 1 and Maximum capacity\u2003 Secondary cells\u2003 <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Cell connection Discharge mode Temperature Creepage and clearance Connections Connecting cells in series Deep discharge protection\u2003 Temperature test conditions Battery packs\u2003 <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Battery pack connections\u2003 Cell electrolyte and gas release\u2003 Excessive load draw\u2003 Charging of type 1 cells and batteries Temperature range Charger specifications\u2003 Charging separated cells or batteries\u2003 Charger limitations Charging outside the hazardous area Charging of type 2 cells and batteries Temperature range <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Charger specifications Charging separated cells or batteries Charger limitations Gassing during charging Charging outside the hazardous area \u2003 Requirements for type 3 secondary batteries Types of permissible batteries Battery containers Internal surfaces <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Mechanical requirements\u2003 Creepage distances Covers\u2003 Cell assembly Liquid extraction Ventilation \u2003 Plugs and sockets Polarity marking\u2003 Other apparatus Insulation resistance\u2003 <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Cells Lids\u2003 Support\u2003 Electrolyte maintenance\u2003 Expansion space\u2003 Filling and vent plugs Electrolyte seals\u2003 Connections Intercell connections\u2003 <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | Temperature assessment\u2003 Connector protection\u2003 Verification and tests Insulation resistance Mechanical shock test Supplementary requirements for non-sparking low power appara <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Supplementary requirements for non-sparking current transfor Other electrical apparatus <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | General supplementary requirements for apparatus producing a Supplementary requirements for enclosed-break devices and no Type testing Ratings Enclosed-break devices\u2003 <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Non-incendive components Construction of enclosed-break devices Free internal volume\u2003 Continuous operating temperature (COT) requirements\u2003 Seal protection Supplementary requirements for hermetically sealed devices p Supplementary requirements for sealed devices or encapsulate Non-metallic materials <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Opening Internal spaces Handling Resilient gasket and seals Encapsulating compounds <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | Thickness of encapsulant Type tests Supplementary requirements for energy-limited apparatus and General <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Associated energy-limited apparatus Energy-limited apparatus Self protected energy-limited apparatus Separation of conducting parts Plugs and sockets <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Protection against polarity reversal Requirements for components on which energy limitation depen Ratings of components Fuses Shunt safety components <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | Battery powered apparatus Marking and documentation Supplementary requirements for restricted-breathing enclosur General Test point for restricted-breathing apparatus\u2003 <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | Test point exemption Gasket and seal requirements\u2003 Non-resilient seals Maintenance considerations\u2003 Internal fans General information on verification and tests Type tests Representative samples <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | Test configuration Tests for enclosures on which the type of protection depends Order of tests Non-metallic enclosures and non-metallic parts of enclosures Metallic enclosures, metallic parts of enclosures and glass Thermal endurance tests Thermal endurance to heat Thermal endurance to cold Mechanical strength tests Tests for resistance to impact <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | Drop test for hand held apparatus Criteria for compliance Tests for degree of protection (IP code) by enclosures Test General\u2003 Mounting\u2003 Category determination\u2003 <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | Test conditions\u2003 Dielectric strength test\u2003 Drain holes and ventilation openings\u2003 Criteria for compliance supplementary to IEC\u00a060529 Dust ingress Water ingress <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | Test for enclosed-break devices and non-incendive components Preparation of enclosed-break device samples Preparation of non-incendive component samples Test conditions for enclosed-break devices and non-incendive General Enclosed-break devices <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Non-incendive components Tests for sealed devices and encapsulated devices Conditioning Voltage test Tests on devices with free space Apparatus for leakage test on sealed devices <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | Leakage test on sealed devices Test for encapsulated devices for luminaires Thermal cycling test Dielectric withstand test\u2003 <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | Test for sealed devices for luminaires Assessment and test of energy-limited apparatus and circuits General Test conditions <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | Variable components Tests for restricted-breathing enclosures Apparatus with provision for routine checking of restricted- Apparatus without provision for routine checking of restrict Apparatus where the nominal volume of the enclosure changes Test for screw lampholders <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | Test for starter holders for luminaires Tests for electronic starters for tubular fluorescent lamps General <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | Moisture resistance, insulation and electric strength test Cut-out device test Life test (failed lamp) Ignitor thermal endurance test\u2003 <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | Evaluation criteria Test for wiring of luminaires subject to high-voltage impuls Mechanical shock test for batteries General\u2003 <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | Test procedure\u2003 Evaluation criteria\u2003 Insulation resistance test for batteries Test conditions Evaluation criteria\u2003 Additional ignition tests for large or high-voltage machines Test for cage rotor construction General Rotor cage ageing process <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | Ignition test Test for stator winding insulation system incendivity General Test conditions Steady state ignition test <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | Impulse ignition test Routine verifications and tests General Specific routine tests Electric strength test\u2003 Alternate dielectric strength test Restricted-breathing routine test Routine tests for electronic starters and ignitors <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | Marking General Additional marking for batteries <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | Examples of marking <\/td>\n<\/tr>\n | ||||||
| 80<\/td>\n | Warning markings Documentation Instructions <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Electrical apparatus for explosive gas atmospheres – Construction, test and marking of type of protection “n” electrical apparatus<\/b><\/p>\n |