IEC 60297-3-100:2008

Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-100: Basic dimensions of front panels, subracks, chassis, racks and cabinets

IEC 60297-3-100:2008 specifies the basic dimensions of front panels, subracks, chassis, racks and cabinets of the 482,6 mm (19 in) series. Subsequent standards of the associated IEC 60297-3 series provide detail dimensions for specific parts of the equipment practice, where the basic dimensions are used as interface to other associated parts.

Structures mécaniques pour équipements électroniques - Dimensions des structures mécaniques de la série 482,6 mm (19 pouces) - Partie 3-100: Dimensions de base des panneaux avant, des bacs, des châssis, des bâtis et des baies

La CEI 60297-3-100:2008 spécifie les dimensions de base des panneaux avant, des bacs, des châssis, des bâtis et des baies de la série 482,6 mm (19 pouces). Les autres normes de la série CEI 60297-3 donnent des dimensions détaillées pour des parties spécifiques des équipements lorsque les dimensions de base sont utilisées pour l'interface avec d'autres parties associées.

General Information

• Status: Published
• Publication Date: 25-Nov-2008
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: SC 48D - Mechanical structures for electrical and electronic equipment
• Drafting Committee: WG 4 - TC 48/SC 48D/WG 4
• Current Stage: PPUB - Publication issued
• Start Date: 26-Nov-2008
• Completion Date: 15-Dec-2008

Standards Content (Sample)

IEC 60297-3-100
Edition 1.0 2008-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series –
Part 3-100: Basic dimensions of front panels, subracks, chassis, racks and
cabinets
Structures mécaniques pour équipements électroniques – Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) –
Partie 3-100: Dimensions de base des panneaux avant, des bacs, des châssis,
des bâtis et des baies
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IEC 60297-3-100
Edition 1.0 2008-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Mechanical structures for electronic equipment – Dimensions of mechanical
structures of the 482,6 mm (19 in) series –
Part 3-100: Basic dimensions of front panels, subracks, chassis, racks and
cabinets
Structures mécaniques pour équipements électroniques – Dimensions des
structures mécaniques de la série 482,6 mm (19 pouces) –
Partie 3-100: Dimensions de base des panneaux avant, des bacs, des châssis,
des bâtis et des baies
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 31.240 ISBN 978-2-88910-095-8
– 2 – 60297-3-100 © IEC:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Arrangement overview.6
5 Front panels .8
5.1 Front panel dimensions .8
5.2 Front panel mounting hole positions. .10
6 Racks .11
6.1 Rack description.11
6.2 Rack/cabinet mounting grid types I and II .12
7 Cabinet .13
7.1 Cabinet description .13
7.2 Dimensions of cabinets type A .13
7.3 Dimensions of cabinets type B .14
Bibliography.15

Figure 1 – Arrangement overview .7
Figure 2 – Front panel dimensions for 1U up to 6U .8
Figure 3 – Front panel dimensions for 6U up to 12U .9
Figure 4 – Front panel mounting hole positions.10
Figure 5 – Array of racks .11
Figure 6 – Rack/cabinet mounting grid .12
Figure 7 – Dimensions of cabinet type A .13
Figure 8 – Dimensions of cabinet type B .14

Table 1 – Front panel dimensions for 1U up to 6U .8
Table 2 – Front panel dimensions for 6U up to 12U.9
Table 3 – Width dimension of fixed rack structures .11
Table 4 – Dimensions of cabinet types A and B .14

60297-3-100 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
DIMENSIONS OF MECHANICAL STRUCTURES
OF THE 482,6 mm (19 in) SERIES –

Part 3-100: Basic dimensions of front panels,
subracks, chassis, racks and cabinets

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60297-3-100 has been prepared by subcommittee 48D:
Mechanical structures for electronic equipment, of IEC technical committee 48:
Electromechanical components and mechanical structures for electronic equipment.
This standard cancels and replaces IEC 60297-1 and IEC 60297-2.
The text of this standard is based on the following documents:
FDIS Report on voting
48D/380/FDIS 48D/386/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – 60297-3-100 © IEC:2008
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 60297 series, published under the general title Mechanical structures
for electronic equipment – Dimensions of mechanical structures of the 482,6 mm (19 in)
series, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60297-3-100 © IEC:2008 – 5 –
INTRODUCTION
This part of IEC 60297 has been developed by merging IEC 60297-1 and IEC 60297-2 into
one document. Both parts are reworked in order to meet the latest market requirements of the
electronics industry. The purpose is also to create an updated documentation and to improve
the drawings and descriptions of the contents. Some parts of this standard contain
dimensions of IEC 60917-2-1 and ETSI EN 300119. The merge of the two parts into one
updates the scope and improves the overview of the modular order, describing the
relationship between front panels, subracks, chassis, racks and cabinets.

– 6 – 60297-3-100 © IEC:2008
MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT –
DIMENSIONS OF MECHANICAL STRUCTURES
OF THE 482,6 mm (19 in) SERIES –

Part 3-100: Basic dimensions of front panels,
subracks, chassis, racks and cabinets

1 Scope
This part of IEC 60297 specifies the basic dimensions of front panels, subracks, chassis,
racks and cabinets of the 482,6 mm (19 in) series. Subsequent standards of the associated
IEC 60297-3 series provides detail dimensions for specific parts of the equipment practice,
where the basic dimensions are used as interface to other associated parts.
2 Normative references
The following referenced documents are indispensable for the application 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 60050-581, International Electrotechnical Vocabulary – Chapter 581: Electromechanical
components for electronic equipment
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 60917-1, Modular order for the development of mechanical structures for electronic
equipment practices – Part 1: Generic standard
ETSI EN 300119-3, Equipment engineering (EE)-European telecommunication standard for
equipment practice – Part 3: Engineering requirements for miscellaneous racks and cabinets
3 Terms and definitions
For the purposes of this document, the terms and definitions of IEC 60917-1 and IEC 60050-
581 apply, as well as the following.
3.1
plinth/base
additional structure or an integrated structure of the cabinet/rack to be used for transport,
cable feed, (seismic) anchoring, or provide a safety or convenience distance to the floor level
3.2
vertical member
structural part of a rack/cabinet providing mounting holes for front panels, chassis and
subracks
4 Arrangement overview
Figure 1 illustrates the relationship of front panels, subracks, chassis, racks and cabinets. The
cabinet is usually assembled with vertical members which are the mounting parts for the

60297-3-100 © IEC:2008 – 7 –
assembly of front panels, subracks and chassis. Racks as defined in IEC 60917-1 are open
structures of pairs of vertical members without any covers (see 6.1).

Typical cabinet with front door and
vertical members with mounting holes,
corresponding to the front panel,
subrack and chassis mounting holes
Vertical
member
Front panel
Subrack
Plug-in units
associated to
the subrack
Chassis
Plinth/base
IEC  2056/08
Figure 1 – Arrangement overview

– 8 – 60297-3-100 © IEC:2008
5 Front panels
5.1 Front panel dimensions
The height increment of a front panel is 1U, equal to 44,45 mm. There are two mounting hole
types as shown in detail “A”. The front panel thickness is not defined by this standard. As
shown in Figures 2 and 3 and Tables 1 and 2, front panels of 1U, 2U and 6U heights may be
provided with different number of mounting holes. The higher number of mounting holes may
be used in case of high load applied to the front panel or other stability requirements. For 6U
front panels two types of hole spacing are possible (see Table1 and Table 2). The front panel
dimensions apply also to chassis and subracks.

Detail A
Height pitch line
Mounting holes
482,6 ± 0,4
14,7 ± 1,2
Detail A
10,3 ± 0,4
13,5 ± 0,4
IEC  2057/08
Dimensions in millimetres
Figure 2 – Front panel dimensions for 1U up to 6U
Table 1 – Front panel dimensions for 1U up to 6U
Height units H H H
1 2 3
n × U
± 0,4 ± 0,4 ± 0,4
1U – 21,83
43,65
(44,45)
31,75 5,95
2U 44,45 21,83
88,10
(88,90)
76,20 5,95
3U
132,55 57,15 37,70
(133,35)
4U
177,00 101,60 37,70
(177,80)
5U
221,45 146,05 37,70
(222,25)
6U
265,90 190,50 37,70
(266,70)
Dimensions are in millimetres and the tolerances are non-cumulative.
U
U
H
H
H
H H
+ 0,5
6,8
60297-3-100 © IEC:2008 – 9 –
Mounting hole dimensions
Height pitch line
(see detail A in Figure 2)
IEC  2058/08
Figure 3 – Front panel dimensions for 6U up to 12U
Table 2 – Front panel dimensions for 6U up to 12U
Height units
H H H H
1 2 3 4
n × U
± 0,4 ± 0,4 ± 0,4 ± 0,4
6U
265,90 190,50 37,70 76,20
(266,70)
7U
310,35 234,95 37,70 57,15
(311,15)
8U
354,80 279,40 37,70 76,20
(355,60)
9U
399,25 323,85 37,70 120,65
(400,05)
10U
443,70 368,30 37,70 165,10
(444,50)
11U
488,15 412,75 37,70 146,05
(488,95)
12U
532,60 457,20 37,70 190,50
(533,40)
Dimensions are in millimetres and tolerances are non-cumulative.
U
Center line
H
H
H
H
– 10 – 60297-3-100 © IEC:2008
5.2 Front panel mounting hole positions.
Figure 4 shows the front panel, subrack and chassis incremental U height and their
corresponding mounting holes. 1U, 2U and 6U front panels mounting hole spacing may be
chosen from two optional versions. The number of available mounting positions for front
panels, subracks of the IEC 60297-3-101 series and chassis products may depend on
environmental and/or application specific requirements.
Height pitch line
Optional hole spacing
1U 1U 2U 2U 3U 4U 5U 6U 6U 7U 8U 9U 10U 11U 12U
NOTE The hole positions shown comply to the standard spacing of a rack/cabinet. The universal spacing is
indicated by centre lines (see Figure 6). For mounting hole dimensions (see detail A in Figure 2).
IEC  2059/08
Figure 4 – Front panel mounting hole positions

60297-3-100 © IEC:2008 – 11 –
6 Racks
6.1 Rack description
The rack structures are defined as a series of vertical member pairs, spaced on a
predetermined coordination width dimension (see Figure 5 and Table 3). They are typically
anchored to the floor at the lower part and to the ceiling and/or wall at the top. Each pair of
vertical members will allow the attachment of front panels, chassis and subracks, in
accordance with this series of standards. The coordination dimension of the fixed rack
structures is equal to the theoretical centre distances within a suite of racks. Each vertical
rack member may be separated from or combined with the vertical member of the adjacent
rack, providing the width coordination dimension is maintained. The heights and depth of such
structures are not covered by this standard.
Table 3 – Width dimension of fixed rack structures
Dimensions in millimetres
Width dimension W 500 525 550 600
C
Front view
Front panel
Subrack
Vertical
Chassis
member
Top view
W W W
C C C
IEC  2060/08
Figure 5 – Array of racks
– 12 – 60297-3-100 © IEC:2008
6.2 Rack/cabinet mounting grid types I and II
The mounting grid applies to the rack and cabinet vertical members. Figure 6 illustrates the
mounting grid in two different types: Type I: The holes correspond with the front panel,
subrack and chassis mounting hole positions. Type II: The same grid includes additional
mounting holes (universal hole spacing). These additional holes do not correspond to the front
panel, chassis or subrack mounting holes (except the optional hole spacing at 1U and 2U).
They may be used for the mounting of other structural parts, such as telescopic slide brackets
or angles. Type II shall be used as the preferred mounting grid. The mounting positions
provide for attachment hardware such as thread clips, nuts, integrated threads or cage nuts.
For interoperability the preferred thread is M 6 × 1.

Type I
Type II
W W
C C
(see Tables 3 and 4) (see Tables 3 and 4)
465,1 ± 1,6 465,1 ± 1,6
≥ 450 ≥ 450
Standard mounting grid with
additional holes (universal
Standard
hole spacing)
mounting grid
IEC  2061/08
NOTE The tolerance between any two holes within a distance of 1 m: ± 0,4 mm.
Dimensions in millimetres
Figure 6 – Rack/cabinet mounting grid
S > n × U
31,75 ± 0,4
7,9 ± 0,8
12,7 ± 0,4 7,9 ± 0, 8
31,75 ± 0,4
31,75 ± 0,4
60297-3-100 © IEC:2008 – 13 –
7 Cabinet
7.1 Cabinet description
A cabinet is defined as a free standing, self-supporting enclosure which may be floor
mounted. The cabinet may be a single unit or may be side by side mounted with multiple
cabinets. A cabinet may or may not be fitted with feet, plinth/base, castors, etc depending on
safety, load carrying and mobility requirements. The cabinet may be fitted with doors and/or
side panels on one or more sides to suit the application. A cabinet will contain or incorporate
vertical members providing the mounting holes for front panels, subracks or chassis. The
mounting holes of the vertical members are on the same mounting grid as on the open rack
structure. Cabinets of type A differ from type B by definition of the depth dimension. Type A
excludes and type B includes front and rear doors.
7.2 Dimensions of cabinets type A
The dimensions of cabinets type A are shown in Figure 7 and Table 4: This type of cabinet
does not include the front and rear doors within the total depth dimension. Feet, plinth/base or
castors are included in the total heights dimension H. Cabinets of type A may provide vertical
members with the mounting grid type I or type II as shown in Figure 6. Vertical members with
the mounting grid type II shall be preferred.
≥ 485
Front view
Vertical members
Feet or plinth/base
Castor W
C
1)
Top view
W < W
C0 C
Recessed plane of vertical members
for cabling or other components
Missing dimensions
(see Figure 6 and Table 4)
1) Front and rear doors are not included
Vertical member
1)
in dimension D
IEC  2062/08
Dimensions in millim
...