ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment; Part 1: Classification of environmental conditions; Sub-part 3: Stationary use at weatherprotected locations

REN/EE-017013

Okoljski inženiring (EE) - Okoljski pogoji in preskusi vplivov okolja na telekomunikacijsko opremo - 1. del: Klasifikacija okoljskih pogojev - 3. poddel: Fiksna uporaba na lokacijah, zaščitenih pred vremenskimi vplivi

General Information

• Status: Not Published
• Technical Committee: EE 1 - EE Environmental Conditions
• Current Stage: 9 - Start of OAP
• Due Date: 12-Feb-2026
• Completion Date: 12-Feb-2026
• Mandate: M/462
• Ref Project: oSIST prEN 300 019-1-3 V3.1.0:2026 - Environmental Engineering (EE) - Environmental conditions and environmental tests for telecommunications equipment - Part 1: Classification of environmental conditions - Sub-part 3: Stationary use at weatherprotected locations

Standards Content (Sample)

Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

EUROPEAN STANDARD
Environmental Engineering (EE);
Environmental conditions and environmental tests
for telecommunications equipment;
Part 1: Classification of environmental conditions;
Sub-part 3: Stationary use at weatherprotected locations

2 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Reference
REN/EE-017013
Keywords
environment, equipment practice, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2026.
All rights reserved.
ETSI
3 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Environmental classes . 8
4.1 Class 3.10: Temperature-controlled enclosed locations having no humidity control . 8
4.2 Class 3.11: Enclosed locations having no temperature or humidity control . 9
4.3 Class 3.12: Locations having neither temperature nor humidity control . 10
5 Environmental conditions. 12
5.1 Climatic conditions. 12
5.2 Biological conditions . 12
5.3 Chemically active substances . 12
5.4 Mechanically active substances . 13
5.5 Mechanical conditions . 14
5.6 Earthquake conditions . 14
Annex A (informative): Bibliography . 16
Annex B (informative): Change history . 17
History . 18

ETSI
4 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE),
and is now submitted for the combined Public Enquiry and Vote phase of the ETSI.
The present document is part 1, sub-part 3 of a multi-part deliverable covering the classification of environmental
conditions and environmental tests for telecommunications equipment, as identified below:
Part 1: "Classification of environmental conditions": (see note 1)
Sub-part 0: "Introduction";
Sub-part 1: "Storage";
Sub-part 2: "Transportation";
Sub-part 3: "Stationary use at weatherprotected locations";
Sub-part 4: "Stationary use at non-weatherprotected locations";
Sub-part 5: "Ground vehicle installations";
Sub-part 6: "Ship environments";
Sub-part 7: "Portable and non-stationary use";
Sub-part 8: "Stationary use at underground locations";
Part 2: "Specification of environmental tests" (see note 2).
NOTE 1: Specifies different standardized environmental classes covering climatic and biological conditions,
chemically and mechanically active substances and mechanical conditions during storage, transportation
and in use. Sub-part 1-0 forms a general overview of part 1.
NOTE 2: Specifies the recommended test severities and test methods for the different environmental classes.
ETSI
5 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
1 Scope
The present document defines classes of environmental conditions and their severities to which telecommunication
equipment may be exposed. The severities specified are those which will have a low probability of being exceeded;
generally less than 1 % of the operating time in a year.
The present document applies to equipment mounted for stationary use including periods of erection work, down time,
maintenance and repair at weatherprotected locations defined in clause 5.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] IEC 60721-2-6:2022: "Classification of environmental conditions - Part 2-6: Environmental
conditions appearing in nature - Earthquake vibration and shock".
[2] IEC 60721-3-3:2019: "Classification of environmental conditions - Part 3-3: Classification of
groups of environmental parameters and their severities - Stationary use at weatherprotected
locations".
[3] IEC 60068-3-3:2019: "Environmental testing - Part 3-3: Supporting documentation and guidance -
Seismic test methods for equipment".
[4] ISO 9223:2012: "Corrosion of metals and alloys — Corrosivity of atmospheres — Classification,
determination and estimation".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
Not applicable.
ETSI
7 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
absolute humidity: mass of water vapour in grams which is associated with one cubic metre of dry air in an air/water
vapour mixture
cooling system: system that controls or influences climate by decreasing the air temperature only
NOTE: This can decrease the absolute humidity.
data centre: all buildings, facilities, offices and rooms which contain enterprise servers, server communication
equipment, cooling equipment and power equipment, and provide some form of data service
NOTE: E.g. large scale mission critical facilities all the way down to small server rooms located in office
buildings.
heating system: system that controls or influences climate by increasing the air temperature only
NOTE: This can decrease the relative humidity.
relative humidity: ratio of the partial pressure of the water vapour in moist air at a given temperature, to the partial
pressure of the water vapour in saturated air at the same temperature
stationary use: use of equipment which is mounted firmly on a structure, or on mounting devices, or permanently
placed at a certain site
NOTE: It is not intended for portable use, but short periods of handling during erection works and for which
down time, maintenance and repair at the location are included.
weatherprotected location: location at which the equipment is protected from direct weather influences
EXAMPLE 1: Totally weatherprotected location (enclosed location):
direct weather influences are totally excluded.
EXAMPLE 2: Partly weatherprotected location (sheltered location):
direct weather influences are not completely excluded.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
RS Response Spectrum
UV UltraViolet
ZPA Zero Period Acceleration
ETSI
8 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
4 Environmental classes
4.1 Class 3.10: Temperature-controlled enclosed locations
having no humidity control
Class 3.10 is a combination of classes 3K22/3Z2/3B1/3S6/3M11 in IEC 60721-3-3 [2], and C1 in ISO 9223 [4], see
Tables 1 to 6 in clause 5.
The climatogram is shown in Figure 1.
Seismic environment: zone 4 as defined in IEC 60721-2-6 [1]. Option zone 4 (modified Mercalli scale ≥ 9): if earthquake
conditions are specified by the customer, the conditions stated in clause 5.6 apply.
This class shall apply to a permanently temperature controlled enclosed location. Humidity usually not controlled. The
climatogram is shown in Figure 1. Exceptional conditions may apply in specific cases (e.g. external extreme
environmental conditions) and these exceptional conditions are shown in Figure 1 where they are described as 3.10E in
clause 5.1 but this is not a separate class.
NOTE: The exceptional conditions described as 3.10E in Figure 1 are not defined in IEC 60721-3-3 [2].
Heating or cooling are used to maintain the required conditions - especially where there is a significant difference
between the room environment and the external ambient. The climate-controlling systems could be periodically
switched on or off but extremely high or low temperatures are prevented.
This class shall apply to locations:
• where installed equipment may be exposed to solar radiation and to heat radiation. It may also be exposed to
movements of the surrounding air due to draughts in buildings. They are not subjected
...

SLOVENSKI STANDARD
01-april-2026
Okoljski inženiring (EE) - Okoljski pogoji in preskusi vplivov okolja na
telekomunikacijsko opremo - 1. del: Klasifikacija okoljskih pogojev - 3. poddel:
Fiksna uporaba na lokacijah, zaščitenih pred vremenskimi vplivi
Environmental Engineering (EE) - Environmental conditions and environmental tests for
telecommunications equipment - Part 1: Classification of environmental conditions - Sub-
part 3: Stationary use at weatherprotected locations
Ta slovenski standard je istoveten z: ETSI EN 300 019-1-3 V3.1.0 (2026-02)
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.050.01 Telekomunikacijska Telecommunication terminal
terminalska oprema na equipment in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

EUROPEAN STANDARD
Environmental Engineering (EE);
Environmental conditions and environmental tests
for telecommunications equipment;
Part 1: Classification of environmental conditions;
Sub-part 3: Stationary use at weatherprotected locations

2 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Reference
REN/EE-017013
Keywords
environment, equipment practice, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2026.
All rights reserved.
ETSI
3 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Environmental classes . 8
4.1 Class 3.10: Temperature-controlled enclosed locations having no humidity control . 8
4.2 Class 3.11: Enclosed locations having no temperature or humidity control . 9
4.3 Class 3.12: Locations having neither temperature nor humidity control . 10
5 Environmental conditions. 12
5.1 Climatic conditions. 12
5.2 Biological conditions . 12
5.3 Chemically active substances . 12
5.4 Mechanically active substances . 13
5.5 Mechanical conditions . 14
5.6 Earthquake conditions . 14
Annex A (informative): Bibliography . 16
Annex B (informative): Change history . 17
History . 18

ETSI
4 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE),
and is now submitted for the combined Public Enquiry and Vote phase of the ETSI.
The present document is part 1, sub-part 3 of a multi-part deliverable covering the classification of environmental
conditions and environmental tests for telecommunications equipment, as identified below:
Part 1: "Classification of environmental conditions": (see note 1)
Sub-part 0: "Introduction";
Sub-part 1: "Storage";
Sub-part 2: "Transportation";
Sub-part 3: "Stationary use at weatherprotected locations";
Sub-part 4: "Stationary use at non-weatherprotected locations";
Sub-part 5: "Ground vehicle installations";
Sub-part 6: "Ship environments";
Sub-part 7: "Portable and non-stationary use";
Sub-part 8: "Stationary use at underground locations";
Part 2: "Specification of environmental tests" (see note 2).
NOTE 1: Specifies different standardized environmental classes covering climatic and biological conditions,
chemically and mechanically active substances and mechanical conditions during storage, transportation
and in use. Sub-part 1-0 forms a general overview of part 1.
NOTE 2: Specifies the recommended test severities and test methods for the different environmental classes.
ETSI
5 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
1 Scope
The present document defines classes of environmental conditions and their severities to which telecommunication
equipment may be exposed. The severities specified are those which will have a low probability of being exceeded;
generally less than 1 % of the operating time in a year.
The present document applies to equipment mounted for stationary use including periods of erection work, down time,
maintenance and repair at weatherprotected locations defined in clause 5.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] IEC 60721-2-6:2022: "Classification of environmental conditions - Part 2-6: Environmental
conditions appearing in nature - Earthquake vibration and shock".
[2] IEC 60721-3-3:2019: "Classification of environmental conditions - Part 3-3: Classification of
groups of environmental parameters and their severities - Stationary use at weatherprotected
locations".
[3] IEC 60068-3-3:2019: "Environmental testing - Part 3-3: Supporting documentation and guidance -
Seismic test methods for equipment".
[4] ISO 9223:2012: "Corrosion of metals and alloys — Corrosivity of atmospheres — Classification,
determination and estimation".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
Not applicable.
ETSI
7 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
absolute humidity: mass of water vapour in grams which is associated with one cubic metre of dry air in an air/water
vapour mixture
cooling system: system that controls or influences climate by decreasing the air temperature only
NOTE: This can decrease the absolute humidity.
data centre: all buildings, facilities, offices and rooms which contain enterprise servers, server communication
equipment, cooling equipment and power equipment, and provide some form of data service
NOTE: E.g. large scale mission critical facilities all the way down to small server rooms located in office
buildings.
heating system: system that controls or influences climate by increasing the air temperature only
NOTE: This can decrease the relative humidity.
relative humidity: ratio of the partial pressure of the water vapour in moist air at a given temperature, to the partial
pressure of the water vapour in saturated air at the same temperature
stationary use: use of equipment which is mounted firmly on a structure, or on mounting devices, or permanently
placed at a certain site
NOTE: It is not intended for portable use, but short periods of handling during erection works and for which
down time, maintenance and repair at the location are included.
weatherprotected location: location at which the equipment is protected from direct weather influences
EXAMPLE 1: Totally weatherprotected location (enclosed location):
direct weather influences are totally excluded.
EXAMPLE 2: Partly weatherprotected location (sheltered location):
direct weather influences are not completely excluded.
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
RS Response Spectrum
UV UltraViolet
ZPA Zero Period Acceleration
ETSI
8 Draft ETSI EN 300 019-1-3 V3.1.0 (2026-02)
4 Environmental classes
4.1 Class 3.10: Temperature-controlled enclosed locations
having no humidity control
Class 3.10 is a combination of classes 3K22/3Z2/3B1/3S6/3M11 in IEC 60721-3-3 [2], and C1 in ISO 9223 [4], see
Tables 1 to 6 in clause 5.
The climatogram is shown in Figure 1.
Seismic environment: zone 4 as defined in IEC 60721-2-6 [1]. Option zone 4 (modified Mercalli scale ≥ 9): if earthquake
conditions are specified by the customer, the conditions stated in clause 5.6 apply.
This class shall apply to a permanently temperature controlled enclosed location. Humidity usually not controlled. The
climatogram is shown in Figure 1. Exceptional conditions may apply in specific cases (e.g. external extreme
environmental conditions) and these exceptional conditions are shown in Figure 1 where they are described as 3.10E in
clause 5.1 but this is not a separate class.
NOTE: The exceptional conditions described as 3.10E in Figure 1 are not defined in IEC 60721-3-3 [2].
Heating or cooling are used to maintain the re
...