basis string | category string | derived_fields list | id string | iec_designation string | north_american_designation string | source string | source_quote string | url string | verified_fields list | country string | division_or_zone string | hazard_class string | iec_standard string | disagreements list | also_reported list | max_surface_temperature_c string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ignition temperature of gas / dust >450 | temperature code | [
"category"
] | t1-temperature-code-t1 | T1 | T1 | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 450 | T1 | >450 | https://referencesource.org/ex-classification-system-crosswalk/t1-temperature-code-t1/ | [
"iec_designation",
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T1 | T1 | 450 | 842",
"value": "842"
}
] | 450 |
Ignition temperature of gas / dust >300-450 | temperature code | [
"category"
] | t2-temperature-code-t2 | T2 | T2 | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 300 | T2 | >300-450 | https://referencesource.org/ex-classification-system-crosswalk/t2-temperature-code-t2/ | [
"iec_designation",
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T2 | T2 | 300 | 572",
"value": "572"
}
] | 300 |
Ignition temperature of gas / dust >280-300 | temperature code | [
"category"
] | temperature-code-t2a | null | T2A | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 280 | T2A | >280-300 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t2a/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T2A | | 280 | 536",
"value": "536"
}
] | 280 |
Ignition temperature of gas / dust >260-280 | temperature code | [
"category"
] | temperature-code-t2b | null | T2B | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 260 | T2B | >260-280 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t2b/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T2B | | 260 | 500",
"value": "500"
}
] | 260 |
Ignition temperature of gas / dust >230-260 | temperature code | [
"category"
] | temperature-code-t2c | null | T2C | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 230 | T2C | >230-260 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t2c/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T2C | | 230 | 446",
"value": "446"
}
] | 230 |
Ignition temperature of gas / dust >215-230 | temperature code | [
"category"
] | temperature-code-t2d | null | T2D | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 215 | T2D | >215-230 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t2d/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T2D | | 215 | 419",
"value": "419"
}
] | 215 |
Ignition temperature of gas / dust >200-300 | temperature code | [
"category"
] | t3-temperature-code-t3 | T3 | T3 | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 200 | T3 | >200-300 | https://referencesource.org/ex-classification-system-crosswalk/t3-temperature-code-t3/ | [
"iec_designation",
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T3 | T3 | 200 | 392",
"value": "392"
}
] | 200 |
Ignition temperature of gas / dust >180-200 | temperature code | [
"category"
] | temperature-code-t3a | null | T3A | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 180 | T3A | >180-200 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t3a/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T3A | | 180 | 356",
"value": "356"
}
] | 180 |
Ignition temperature of gas / dust >165-180 | temperature code | [
"category"
] | temperature-code-t3b | null | T3B | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 165 | T3B | >165-180 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t3b/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T3B | | 165 | 329",
"value": "329"
}
] | 165 |
Ignition temperature of gas / dust >160-165 | temperature code | [
"category"
] | temperature-code-t3c | null | T3C | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 160 | T3C | >160-165 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t3c/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T3C | | 160 | 320",
"value": "320"
}
] | 160 |
Ignition temperature of gas / dust >135-200 | temperature code | [
"category"
] | t4-temperature-code-t4 | T4 | T4 | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 135 | T4 | >135-200 | https://referencesource.org/ex-classification-system-crosswalk/t4-temperature-code-t4/ | [
"iec_designation",
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T4 | T4 | 135 | 275",
"value": "275"
}
] | 135 |
Ignition temperature of gas / dust >120-135 | temperature code | [
"category"
] | temperature-code-t4a | null | T4A | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 120 | T4A | >120-135 | https://referencesource.org/ex-classification-system-crosswalk/temperature-code-t4a/ | [
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T4A | | 120 | 248",
"value": "248"
}
] | 120 |
Ignition temperature of gas / dust >100-135 | temperature code | [
"category"
] | t5-temperature-code-t5 | T5 | T5 | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 100 | T5 | >100-135 | https://referencesource.org/ex-classification-system-crosswalk/t5-temperature-code-t5/ | [
"iec_designation",
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T5 | T5 | 100 | 212",
"value": "212"
}
] | 100 |
Ignition temperature of gas / dust >85-100 | temperature code | [
"category"
] | t6-temperature-code-t6 | T6 | T6 | https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups | 85 | T6 | >85-100 | https://referencesource.org/ex-classification-system-crosswalk/t6-temperature-code-t6/ | [
"iec_designation",
"max_surface_temperature_c",
"north_american_designation"
] | null | null | null | null | [] | [
{
"as_of": "2026-08-06T00:00:00",
"field": "max_surface_temperature_f",
"source": "https://ldpi-inc.com/resources/classification-codes/class-1-locations/",
"source_quote": "T6 | T6 | 85 | 185",
"value": "185"
}
] | 85 |
null | protection concept | [
"category"
] | class-i-ca-protection-concept-type-x | null | Type X | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Type X CA Class I | https://referencesource.org/ex-classification-system-crosswalk/class-i-ca-protection-concept-type-x/ | [
"country",
"hazard_class",
"north_american_designation"
] | CA | null | Class I | null | null | null | null |
null | protection concept | [
"category"
] | class-i-us-protection-concept-type-x | null | Type X | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Type X US Class I Division 1 NFPA 496 (FM 3620) | https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-type-x/ | [
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | US | Division 1 | Class I | NFPA 496 (FM 3620) | null | null | null |
null | protection concept | [
"category"
] | class-i-ca-protection-concept-type-y | null | Type Y | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Type Y CA Class I Division 1 NFPA 496 | https://referencesource.org/ex-classification-system-crosswalk/class-i-ca-protection-concept-type-y/ | [
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | CA | Division 1 | Class I | NFPA 496 | null | null | null |
null | protection concept | [
"category"
] | class-i-us-protection-concept-type-y | null | Type Y | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Type Y US Class I Division 1 NFPA 496 (FM 3620) | https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-type-y/ | [
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | US | Division 1 | Class I | NFPA 496 (FM 3620) | null | null | null |
Pressurized | protection concept | [
"category"
] | class-i-ca-protection-concept-type-z | null | Type Z | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Pressurized Type Z CA Class I Division 2 NFPA 496 | https://referencesource.org/ex-classification-system-crosswalk/class-i-ca-protection-concept-type-z/ | [
"basis",
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | CA | Division 2 | Class I | NFPA 496 | null | null | null |
null | protection concept | [
"category"
] | class-i-us-protection-concept-type-z | null | Type Z | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Type Z US Class I Division 2 NFPA 496 (FM 3620) | https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-type-z/ | [
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | US | Division 2 | Class I | NFPA 496 (FM 3620) | null | null | null |
null | protection concept | [
"category"
] | class-i-ca-protection-concept-xp | null | (XP) | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | (XP) CA Class I Division 1 C22.2 No. 30 | https://referencesource.org/ex-classification-system-crosswalk/class-i-ca-protection-concept-xp/ | [
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | CA | Division 1 | Class I | C22.2 No. 30 | null | null | null |
Explosion Proof | protection concept | [
"category"
] | class-i-us-protection-concept-xp | null | (XP) | https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf | Explosion Proof (XP) US Class I Division 1 UL 1203 | https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-xp/ | [
"basis",
"country",
"division_or_zone",
"hazard_class",
"iec_standard",
"north_american_designation"
] | US | Division 1 | Class I | UL 1203 | null | null | null |
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