IEC 62966-1:2019

Mechanical structures for electrical and electronic equipment - Aisle containment for IT cabinets - Part 1: Dimensions and mechanical requirements

IEC 62966-1:2019 defines the dimensions and mechanical requirements of aisle containment for information technology (IT) cabinets. The cabinets concerned are dealt with in the standard series IEC 60297 and IEC 60917. The objective of this document is to stipulate properties and requirements of aisle containment ensuring cost effective installation, energy efficient and user-friendly operation of IT equipment in data centres and server rooms.
Key words: IT Cabinets, Aisle Containment

Structures mécaniques pour équipements électriques et électroniques - Confinement d'allées pour les baies informatiques - Partie 1: Dimensions et exigences mécaniques

IEC 62966-1:2019 définit les dimensions et les exigences mécaniques relatives au confinement d'allées pour les baies informatiques (IT). Les baies concernées sont couvertes par les séries de normes IEC 60297 et IEC 60917. L'objectif du présent document est de définir les propriétés et les exigences relatives au confinement d'allées afin de garantir une installation économique, un rendement énergétique et une exploitation pratique des équipements informatiques dans les salles de serveurs et les centres de traitement de données.
Mots clés: baies informatiques (IT), confinement d'allées

General Information

• Status: Published
• Publication Date: 07-Mar-2019
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: SC 48D - Mechanical structures for electrical and electronic equipment
• Drafting Committee: WG 5 - TC 48/SC 48D/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 08-Mar-2019
• Completion Date: 29-Mar-2019

Standards Content (Sample)

IEC 62966-1 ®
Edition 1.0 2019-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mechanical structures for electrical and electronic equipment – Aisle
containment for it cabinets –
Part 1: Dimensions and mechanical requirements

Structures mécaniques pour équipements électriques et électroniques –
Confinement d'allées pour les baies informatiques –
Partie 1: Dimensions et exigences mécaniques

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IEC 62966-1 ®
Edition 1.0 2019-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Mechanical structures for electrical and electronic equipment – Aisle

containment for it cabinets –
Part 1: Dimensions and mechanical requirements

Structures mécaniques pour équipements électriques et électroniques –

Confinement d'allées pour les baies informatiques –

Partie 1: Dimensions et exigences mécaniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.240 ISBN 978-2-8322-6614-4

– 2 – IEC 62966-1:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Design of a containment . 8
4.1 Preferred arrangement setup of aisle containment . 8
4.2 Optional arrangement set up of aisle containment . 9
4.2.1 Arrangement of different sized cabinets for an aisle containment . 9
4.2.2 Arrangement for an aisle containment with building structure elements . 10
4.2.3 Aisle containment at walls of buildings . 11
4.3 Top cover elevation . 12
4.4 Adaptation of air flow orientation . 13
4.5 Air duct connection . 13
5 Requirements of containment . 14
5.1 Air tightness . 14
5.2 Stability. 15
5.3 Design of the ceiling of the aisle containment . 15
6 Aisle containment dimensions . 15
6.1 General . 15
6.2 Width of the aisle . 16
6.3 Dimensions of cabinets . 16
6.4 Height of the elevated aisle top cover . 17
Bibliography . 18

Figure 1 – Examples of an aisle containment . 6
Figure 2 – Preferred arrangement setup of an aisle containment . 9
Figure 3 – Possible arrangement of an aisle containment . 10
Figure 4 – Aisle containment with an integrated structural element . 11
Figure 5 – Top view of aisle containment with an integrated structural element not in
line with the cabinet front . 11
Figure 6 – Aisle containment at a wall of a building . 12
Figure 7 – Elevated aisle height . 13
Figure 8 – Aisle containment with an air duct . 14
Figure 9 – Dimensions at an aisle containment . 16

Table 1 – Aisle widths . 16
Table 2 – Cabinet height including plinth. 17
Table 3 – Cabinet widths . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MECHANICAL STRUCTURES FOR
ELECTRICAL AND ELECTRONIC EQUIPMENT –
AISLE CONTAINMENT FOR IT CABINETS –

Part 1: Dimensions and mechanical requirements

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62966-1 has been prepared by subcommittee 48D: Mechanical
structures for electrical and electronic equipment, of IEC technical committee 48: Electrical
connectors and mechanical structures for electrical and electronic equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
48D/691/FDIS 48D/698/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 62966-1:2019 © IEC 2019
A list of all parts in the IEC 62966 series, published under the general title Mechanical
structures for electrical and electronic equipment – Aisle containment for IT cabinets, can be
found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION
Cabinets of the IEC 60297 and IEC 60917 standard series are used as enclosures of
electronical and electric equipment in many different fields of application. A wide field of
application is represented by enclosures equipped with electronic information technology (IT)
equipment. They are frequently set up in large numbers in server rooms and data centres.
During their operation, the electronic equipment installed generates a considerable amount of
heat that must be dissipated from the equipment by means of cooling air. Precise adjustment
of the supply air temperature and a sufficient cooling air flow are indispensable prerequisites
for the fail-safe operation of equipment in information technology.
Currently, it is common use in data centres and server rooms to set up cabinets in rows. The
server cabinets along the rows are usually arranged in such a way that surfaces with cold
supply air inlets face each other across an aisle, and surfaces with hot exhaust air outlets
also face each other across an aisle. This row configuration is generally known as hot
aisle/cold aisle configuration. Moreover, air is supplied and discharged exclusively via the
front and rear panels of the server cabinets, which are frequently perforated doors. It is
assumed that inside the IT equipment, the cooling air is moved in horizontal direction, taking it
in at the front and discharging it at the rear.
The required cooling air is provided by room air or row air conditioners. Warm exhaust air is
moved by fans usually through a fluid/air heat exchanger that cools it.
In the arrangement described, considerable quantities of cooling air pass by the IT equipment,
especially servers, which it is expected to cool, without having any cooling effect.
Concurrently, recirculation within and outside the cabinet causes hot exhaust air to be
absorbed as cooling air, which results in faulty operation. In order to minimize such
recirculation, more cooling air than required needs to be supplied, this adversely affects the
energy efficiency of the data centre.
The separation of air flows into enclosed air volumes consisting of either cold supply air or hot
exhaust air precludes recirculation to the largest possible extent (see Figure 1). Such
separation reduces the required cooling air flow because re-circulations are ruled out. Air flow
separation can reduce power consumption by the fans in the cooling units once fan speed
control fans are used.
Separation of the cold supply air from the hot exhaust air is achieved by covering the aisles of
the same temperature level with top cover elements, adding doors or similar design elements
to the end of the aisles, and all openings inside the cabinets at the front 482,6mm (19”) rails
shall be closed.
The installations of aisle containments in data centres and IT rooms shall not restrict the air
intake demands for the correct usage and operation of servers or other IT equipment.
Especially the required supply air temperature and the cooling air flow rate needed shall not
be affected by the aisle containment. This can improve the energy efficiency as most of the
cooling infrastructure has a higher efficiency with a higher difference between the air intake
and the air exhaust temperature.
The temperature difference between supply and exhaust air rises due to the reduced cooling
air volume. As the supply air temperature of the cooling air is usually specified, thus being
kept constant, an increase in the temperature difference results in an increase of the
temperature of the warm exhaust air. This has a positive impact on the temperature difference
to the temperature of ambient air, as the energy efficiency of the cooling of the building and
infrastructure is improved by the raised temperature gradient.
The period during which system cooling is required to be supported by a mechanical cooling
machine is reduced. Both the reduction of the cooling air flow and the reduction of times of
mechanical cooling lead to considerable reduction in the consumption of electrical power. This
effects significant savings in operating costs for data centres and server rooms. This results in

– 6 – IEC 62966-1:2019 © IEC 2019
an environmentally-friendly use of resources, thereby relieving stress on the environment and
slowing down global warming by reduced CO emission.
Part 1 of the standard series defines geometric dimensions and mechanical properties
ensuring undisturbed, energy-efficient and user-friendly operation of the data centre.
Part 2 defines characteristics and requirements of air separation, especially the air leakage rate,
and determines the air leakage rate. Besides, operational parameters are determined,
especially temperatures at which IT equipment in aisle containment are operated.
Part 3 deals with aspects of safely operating IT equipment in aisle containment, discussing
special fire-protection and fire-fighting issues. It also provides required specifications of the
doors for access to the aisle containment and possible access control.
In the past years, widely varying forms of aisle containment have been installed in server
rooms and data centres. This document is intended to provide confidence by reflecting and
structuring the currently most widely used solutions and catering for the energy-efficient
operation of IT equipment. This document is also expected to solve probable uncertainties and
problems concerning the containment technology
Cold aisle containment configuration
Top cover
Ceiling
Cabinets in rows
HOT HOT
COLD
HOT HOT
Raised floor
Door
COLD COLD
Concrete slab
Hot aisle containment configuration
Ceiling
HOT HOT
Ceiling
panel
Air duct
HOT
COLD COLD
Concrete slab
Cabinets in rows Door
IEC
Figure 1 – Examples of an aisle containment

CRAC
CRAC
CRAC
CRAC
MECHANICAL STRUCTURES FOR
ELECTRICAL AND ELECTRONIC EQUIPMENT –
AISLE CONTAINMENT FOR IT CABINETS –

Part 1: Dimensions and mechanical requirements

1 Scope
This part of IEC 62966 defines the dimensions and mechanical requirements of aisle
containment for information technology (IT) cabinets. The cabinets concerned are dealt with in
the standard series IEC 60297 and IEC 60917. The objective of this document is to stipulate
properties and requirements of aisle containment ensuring cost effective installation,
energy-efficient and user-friendly operation of IT equipment in data centres and server rooms.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 61587-1, Mechanical structures for electronic equipment – Tests for IEC 60917 and
IEC 60297 series – Part 1: Environmental requirements, test set-up and safety aspects for
cabinets, racks, subracks and chassis under indoor condition use and transportation
IEC 61587-2, Mechanical structures for electronic equipment – Tests for IEC 60917 and
60297 – Part 2: Seismic tests for cabinets and racks
IEC 62966-2: Mechanical structures for electrical and electronic equipment – Aisle
containment for IT cabinets – Part 2: Details of air flow, air separation and air cooling
requirements (to be published)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
aisle containment
physical containment mainly formed of IT cabinets arranged in parallel rows with a centre
aisle, a top cover across the aisle, doors or building structure at the ends of the aisle, and a
floor
Note 1 to entry: The main purpose is the cooling air guidance to the IT equipment and the avoidance of bypass air
and cooling air re-circulations.

– 8 – IEC 62966-1:2019 © IEC 2019
3.2
aisle width
nominal horizontal distance between the cabinet frames which are contained by the aisle
containment, whereas the referential vertical surface is oriented towards the interior of the
aisle
3.3
aisle height
vertical distance between the floor and the outside of the aisle containment top cover
3.4
aisle ceiling height
height clearance inside the aisle
3.5
aisle length
longest horizontal distance along the cabinets of the aisle arrangement
3.6
elevated aisle top cover height
difference between cabinet height and the vertical distance between the floor base of
installation and the top cover of the aisle containment
3.7
cooling air flow
air flow per time unit mainly moved horizontally through the IT equipment, removing heat
caused by ohmic loss in IT equipment by means of mass heat transfer from the equipment
Note 1 to entry: The cooling air flow may be related to mass as cooling air mass flow, but is usually related to
volume as cooling air volume flow.
3.8
supply air
cooling air prior to entering the cabinet mounted IT equipment, whose low temperature is
capable of absorbing heat from the equipment
3.9
exhaust air
heated cooling air after leaving the cabinet mounted IT equipment, which, due to an increase
in temperature, is discharging heat from the equipment
4 Design of a containment
4.1 Preferred arrangement setup of aisle containment
When setting up aisle containment, the cabinets for receiving IT equipment are arranged in
rows. The cabinets along the rows are oriented in such a way that the surfaces with supply air
inlets and those with exhaust air outlets face each other respectively, thus forming an aisle
(see Figure 2). These surfaces are usually formed by perforated doors of the cabinets. The air
flow inside the cabinets along the row of cabinets is similarly oriented. This arrangement is
known as hot aisle/cold aisle arrangement, and is widely used.
In some cases, older data centres are still arranged in foot print patterns where surfaces with
supply air inlets face surfaces with exhaust air outlets. Such arrangement with a similarly
oriented air flow in each row of cabinets is not suited for being enclosed by aisle containment.
Both ends of cabinet rows in aisle containment are formed by doors or other structural
elements that are suitable for reliably separating the air flow into supply air and exhaust air.

The aisle containment is set up on a raised floor or solid ground. For the proper functioning of
the aisle containment, air flow separation between supply and exhaust air shall be guaranteed
between the floor and the cabinet. Likewise, the aisle top cover shall provide the separation
between supply and exhaust air. Thus the aisle is contained by cabinets at its long sides, by
doors at its front faces, by the floor from below and by the top cover from above.
The length of the containment is determined by the number of cabinets to be integrated into
the containment. Thereby, it is deemed economical not to design the length of the aisle too
short. Too long an aisle is regarded counter-productive to user-friendly operation. Principally,
aisle lengths can be designed in such a way as if the server room or data centre were set up
without any aisle containment. A number of cabinets between three and twelve units per row
of containment is suitable for optimal aisle length. It may be necessary, due to building layout
or IT requirements, to differ from the optimal aisle length.
Top cover
Top cover elevation
Area of aisle containment
Floor
Row of cabinets
Door at the end of the
aisle containment
IEC
Figure 2 – Preferred arrangement setup of an aisle containment
4.2 Optional arrangement set up of aisle containment
4.2.1 Arrangement of different sized cabinets for an aisle containment
The cabinet surfaces oriented towards the inner side of the aisle containment are expected to
be arranged in line. If -in exceptional cases- an aligned arrangement cannot be formed, the
requirements of escape and rescue paths shall be fulfilled. That includes swinging of all doors
of the rescue path in all possible escaping directions. The details of dimensions of the escape
and rescue paths are defined in national and local regulations and may be detailed in future
parts of IEC 62966.The cabinets should be aligned laterally in such a way that air flow
separation between supply and exhaust air is guaranteed between the cabinets. To that end,
the cabinets are placed immediately next to each other. Arrangements with all depth of IT
cabinets are possible to form containment (see Figure 3).
An aisle containment should be formed by cabinets of the same cabinet height. However, an
aisle containment should be designed in such a way that cabinets of various heights can be
optionally integrated into the containment. For that purpose, vertical barriers are installed in
the cabinet surfaces oriented towards the contained aisle for balancing differences in height
and providing for air flow separation between supply and exhaust air.

– 10 – IEC 62966-1:2019 © IEC 2019
Especially in cabinet arrangement without a raised floor, plinths/base can be applied
underneath the cabinets, accommodating supply lines and cabling. Such plinths shall also be
designed in a way as to guarantee air separation between supply and exhaust air.
For air-tight design of an aisle containment at the end of the row, it is necessary that both
rows of aisle-contained cabinets are of the same length. If this proves impossible, due to
varying cabinet widths, space-filling elements shall be inserted to achieve similar lengths of
cabinet rows.
Top cover
Top cover elevation
Space filling element
Row of cabinets with
different sizes
Door at the end of the
Plinth of a cabinet
aisle containment
IEC
Figure 3 – Possible arrangement of an aisle containment
4.2.2 Arrangement for an aisle containment with building structure elements
It can occur that vertical structural elements of a building, such as columns or supports, are
required to be integrated into the aisle containment within one row of cabinets (see Figure 4).
Covers are expected to facilitate air flow separation between the structural element and the
components of the aisle containment in such a way that air flow separation between supply
and exhaust air is guaranteed. Horizontal structural elements in the building, such as beams
or trusses, should not be included in the containment.

Structural element
of the building
IEC
Figure 4 – Aisle containment with an integrated structural element
Structural elements may be located not in line with the cabinet front in an aisle containment.
Additional elements are required to ensure the warm / cold separation (see Figure 5).
Vertical structural
element of the
building
IEC
Figure 5 – Top view of aisle containment with an integrated structural element
not in line with the cabinet front
4.2.3 Aisle containment at walls of buildings
When attaching the aisle containment, care shall be taken to create an air-tight connection
between the wall of the building and the aisle containment. This arrangement provides the
containment only for one row of IT cabinets (see Figure 6). It is possible to arrange one front
end of an aisle containment to be flush to a wall. In this case a door at this end of the aisle
containment is not necessary.
– 12 – IEC 62966-1:2019 © IEC 2019
Wall of building
Floor
IEC
Figure 6 – Aisle containment at a wall of a building
4.3 Top cover elevation
For opening the cabinet doors and for better accessibility to the aisle containment, it is useful
to arrange the top cover elements more elevated than the tallest cabinet height
(see Figure 7). This forms additional vertically attached and horizontally running covers, which
can be used for attaching additional accessories. Containments without the top cover
elevation can also be used as long as their design provides an air separation for cabinets with
different heights. Between the top cover of the containment and the room ceiling an adequate
clearance shall remain for lighting, cable trays, service access, fire access, required air
circulation and cleaning.
Top cover elevation
IEC
Figure 7 – Elevated aisle height
4.4 Adaptation of air flow orientation
Most IT equipment is designed in such a way that the fresh cooling air enters from the front
and the heated air leaves the equipment at the rear. All manufacturers of IT equipment are
invited to design the cooling air path in such way. Some IT equipment differs from the front to
rear, horizontal cooling air flow scheme required for aisle containment. For this type of
equipment cooling air flow shall be re-oriented using air ducts or re-directing tubes, so that
the cooling air flow matches the cooling air supply at the front and exhaust at the rear pattern
used for aisle containment. The separation between supply and exhaust air shall also
continue to be maintained inside of such an equipment.
4.5 Air duct connection
In some applications it is useful to connect the top cover of aisle containment to an air duct.
Such an air duct provides a connection to the cooling air circulation in a false ceiling plenum
(see Figure 8).
Elevated top
cover height
– 14 – IEC 62966-1:2019 © IEC 2019
Air duct
IEC
Figure 8 – Aisle containment with an air duct
5 Requirements of containment
5.1 Air tightness
A decisive design feature of aisle containment is its separation with air tightness between the
supply air to the IT equipment and the exhaust air discharged from the IT equipment.
For this purpose and apart from the structural elements at the end faces of rows, usually
doors, and the aisle containment top cover, the cabinets shall be designed in such a way, first
of all, as to prevent supply air recirculation and bypass of the IT equipment when passing
from the cold aisle to the hot aisle.
In typical cases the gaps between the vertical members and the side panels inside the
cabinets shall be closed.
Also, unused installation space, if any, between the verticals members shall be closed to the
air flow.
In cases with an aisle containment design with cabinets without side panels, the warm/cold air
separation shall be integrated in the cabinets.
A typical position to arrange the air tight separation is vertically in the front attachment plane
of the front vertical members.
Doors and aisle covers as well as horizontal structural elements for lining the elevated aisle
top and the gap between the floor and the bottom of the cabinet shall be made air tight.
The quantification of air tightness and of the air leakage rate are described in IEC 62966-2.

5.2 Stability
The cabinets are essential structural elements of the aisle containment according IEC 61587-
1 and IEC 61587-2. Their stability shall be designed in such a way that the fitting of aisle
containment doors and covers is supported. In any case, the aisle containment shall be
designed in such a way that all elements are intrinsically safe and embrace the contained
volume with the required stability. The cabinets shall be provided with anchoring points where
further aisle containment structural elements, such as doors, the elevated aisle top cover and
the aisle cover can be affixed. The stability of the cabinets shall be selected in such a way
that they can receive the IT equipment despite the additional load exerted by the aisle
elements.
The total load per cabinet including additional mechanical structure for the aisle containment
shall be lower than the defined static and dynamical mechanical load defined in IEC 61587-1.
Seismic requirements should be considered by designers and users in accordance with
IEC 61587-2.
The cabinets are prevented from tilting by arranging them side by side. It is recommended to
laterally fix the cabinets to each other. The aisle cover is not regarded to be an element to
support tilt protection.
5.3 Design of the ceiling of the aisle containment
If aisle lighting is not mounted within the aisle containment, the top cover elements shall be
designed to be translucent and easily removable to enable swift access to the lighting system.
Easy access to the cabling and sensors shall also be provided for.
6 Aisle containment dimensions
6.1 General
Preferential dimensions of the aisle containment shall be observed to facilitate user-friendly
design and energy-efficient IT operation. For that purpose, the raised floor grid of 600 mm x
600 mm, widely in use in server rooms and data centres, has been adopted for the aisle
containment (see Figure 9). If a raised floor is used the cabinets in the aisle containment
should be aligned in such a way that the referential edge of the surfaces oriented towards the
containment is flush with the edge of a raised floor tile.

– 16 – IEC 62966-1:2019 © IEC 2019
Top cover
elevation
Aisle ceiling height
Cabinet height
Aisle
width
Cabinet
Cabinet width
depth
IEC
Figure 9 – Dimensions at an aisle containment
6.2 Width of the aisle
The aisle width should follow the raised floor grid of 600 mm x 600 mm. Aisle widths narrower
than 900 mm do not meet the local or national requirements of rescue and escape paths.
Aisle widths smaller than 1 200 mm are not recommended and may not meet local or national
requirements of rescue and escape paths. Aisle widths wider than 1 800 mm call for
increased requirements on the stability of the cover structure. Besides, wider aisle widths
counteract the economic use of data centre space. Aisle widths exceeding 1 800 mm shall
therefore be avoided. Table 1 shows possible aisle widths.
Table 1 – Aisle widths
Aisle width
mm
900*
1 200
1 500*
1 800
* Not preferred.
6.3 Dimensions of cabinets
Aisle containments should be designed in such a way that the heights of the cabinets as
specified in Table 2 also include, if applicable, the plinth heights. Combinations of cabinets
are allowed. The cabinet dimensions are listed in Tables 2 and 3.
Aisle height
Table 2 – Cabinet height including plinth
Cabinet height
including plinth
mm
2 000
2 100
2 200
2 300
2 400
Table 3 – Cabinet widths
Cabinet width
mm
1 000
Since a cabinet width of 300 mm is not suitable for IT equipment, such cabinet dimensions are
used for e.g. row cooling units and cable management. Cable management structure may
arrange left and right of IT cabinets with a total width of 300 mm.
6.4 Height of the elevated aisle top cover
Heights from 0 mm to 250 mm shall be taken into consideration for the elevated aisle top
cover as specified in 4.3. Thereby, the referential height for the elevation height of aisle top
covers shall be the highest cabinet within the containment.

– 18 – IEC 62966-1:2019 © IEC 2019
Bibliography
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structures of the 482,6 mm (19 in) series – Part 3-100: Basic dimensions of front panels,
subracks, chassis, racks and cabinets
IEC 60297-3-101, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-101: Subracks and associated plug-in units
IEC 60297-3-102, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-102: Injector/extractor handle
IEC 60297-3-103, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-103: Keying and alignment pin
IEC 60297-3-104, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-104: Connector dependent interface
dimensions of subracks and plug-in units
IEC 60297-3-105, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-105: Dimensions and design aspects for 1U
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IEC 60297-3-106, Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series – Part 3-106: Adaptation dimensions for subracks
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plug-in units
IEC 60297-3-109, Mechanical structures for electrical and electronic equipment – Dimensions
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equipment practices – Part 2: Sectional specification – Interface co-ordination dimensions for
the 25 mm equipment practice – Section 1: Detail specification – Dimensions for cabinets and
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equipment practices – Part 2: Sectional specification – Interface co-ordination dimensions for
the 25 mm equipment practice – Section 2: Detail specification – Dimensions for subracks,
chassis, backplanes, front panels and plug-in units

IEC 60917-2-3, Modular order for the development of mechanical structures for electronic
equipment practices – Part 2-3: Sectional specification – Interface co-ordination dimensions
for the 25 mm equipment practice – Extended detail specification – Dimensions for subracks,
chassis, backplanes, front panels and plug-in units
IEC 60917-2-4, Modular order for the development of mechanical structures for electronic
equipment practices – Part 2-4: Sectional specification – Interface co-ordination dimensions
for the 25 mm equipment practice – Adaptation dimensions for subracks or chassis applicable
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IEC 60917-2-5, Modular order for the development of mechanical structures for electronic
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IEC 62610-2, Mechanical structures for electrical and electronic equipment – Thermal
management for cabinets in accordance with IEC 60297 and IEC 60917 series – Part 2:
Method for the determination of forced air cooling structure

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– 20 – IEC 62966-1:2019 © IEC 2019
SOMMAIRE
AVANT-PROPOS . 21
INTRODUCTION . 23
1 Domaine d'application .
...