HD 60364-7-729:2009

SLOVENSKI STANDARD
01-december-2009
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Low-voltage electrical installations -- Part 7-729: Requirements for special installations or
locations - Operating or maintenance gangways
Errichten von Niederspannungsanlagen - Anforderungen für Betriebsstätten, Räume und
Anlagen besonderer Art - Teil 7-729: Bedienungsgänge und Wartungsgänge
Installations électriques à basse tension -- Partie 7-729: Règles pour les installations et
emplacements spéciaux - Passages d'entretien ou de service
Ta slovenski standard je istoveten z: HD 60364-7-729:2009
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT
HD 60364-7-729
DOCUMENT D'HARMONISATION
August 2009
HARMONISIERUNGSDOKUMENT
ICS 91.140.50
English version
Low-voltage electrical installations -
Part 7-729: Requirements for special installations or locations -
Operating or maintenance gangways
(IEC 60364-7-729:2007, modified)

Installations électriques à basse tension - Errichten von Niederspannungsanlagen -
Partie 7-729: Règles pour les installations Teil 7-729: Anforderungen
et emplacements spéciaux - für Betriebsstätten, Räume
Passages d'entretien ou de service und Anlagen besonderer Art -
(CEI 60364-7-729:2007, modifiée) Bedienungsgänge und Wartungsgänge
(IEC 60364-7-729:2007, modifiziert)

This Harmonization Document was approved by CENELEC on 2009-04-22. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this
Harmonization Document at national level.

Up-to-date lists and bibliographical references concerning such national implementations may be obtained on
application to the Central Secretariat or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 60364-7-729:2009 E

Foreword
The text of document 64/1595/FDIS, future edition 1 of IEC 60364-7-729, prepared by IEC TC 64,
Electrical installations and protection against electric shock, was submitted to the IEC-CENELEC parallel
vote.
A draft amendment, prepared by the former SC 64A, Protection against electric shock, of Technical
Committee CENELEC TC 64, Electrical installations and protection against electric shock, was submitted
to the formal vote.
The combined texts were approved by CENELEC as HD 60364-7-729 on 2009-04-22.
The following dates were fixed:
- latest date by which the existence of the HD (doa) 2009-11-01
has to be announced at national level
- latest date by which the HD has to be implemented (dop) 2010-05-01
at national level by publication of a harmonized
national standard or by endorsement
- latest date by which the national standards conflicting (dow) 2012-05-01
with the HD have to be withdrawn
In this document, the common modifications to the International Standard are indicated by a vertical line
in the left margin of the text.
For this Harmonization Document, the informative Annex B of IEC 60364-7-729:2007 shall be
disregarded and has been replaced by the normative Annex ZA, Special national conditions, and the
informative Annex ZB, A-deviations.
Annexes ZA and ZB have been added by CENELEC.

– 3 – HD 60364-7-729:2009
729 Introduction
The requirements of this part of HD 60364 supplement, modify or replace certain of the general
requirements of the other parts of HD 60364.
The clause numbering of Part 7-729 follows the pattern and corresponding references of HD 60364. The
numbers following the particular number of Part 7-729 are those of the corresponding parts or clauses of
HD 60364.
The absence of reference to a part, clause or subclause means that the corresponding general
requirements are applicable.
729.1 Scope
The requirements of this part of HD 60364 apply to basic protection and other aspects in restricted
access areas with switchgear and controlgear assemblies, including requirements for operating or
maintenance gangways.
729.2 Normative references
The following normative documents contain provisions which through reference in this text, constitute
provisions of this part of HD 60364. For dated references, subsequent amendments to, or revisions of any
of these publications do not apply.
HD 60364-1:2008, Low-voltage electrical installations – Part 1: Fundamental principles, assessment of
general characteristics, definitions (IEC 60364-1:2005, mod.)
HD 60364-4-41, Low-voltage electrical installations – Part 4-41: Protection for safety – Protection against
electric shock (IEC 60364-4-41, mod.)
729.30 Assessment of general characteristics
Add the following requirements:
For restricted access areas the following apply:
– restricted access areas shall be clearly and visibly marked by appropriate signs;
– unauthorised persons shall not have access to restricted access areas;
– door(s) provided for closed restricted access areas shall allow easy evacuation to the outside by
opening without the use of a key, tool or any other device which not part of the opening mechanism.
729.410.3.7
Replace the paragraph with the following requirements:
In restricted access areas where it is not reasonably practicable to provide protective measures for basic
protection (protection against direct contact) in accordance with HD 60364-4-41, minimum distances are
required.
NOTE 1  See HD 60364-1, Clause 30 for assessment of general characteristics when deciding to use this method of protection.
NOTE 2  In cases of protective device with high rating, such as large circuit-breakers, greater distances may be necessary for the
withdrawing of the device.
729.410.3.7.1
Where the gangway has unprotected live parts arranged on one side only (see Figure 729.1), the
minimum distances shall be:
a) width of gangway between the wall and live parts  900 mm;
b) free passage in front of controls (handles, etc.)  700 mm;
c) height of live parts above the floor 2 500 mm.

Live parts
2 500 mm
900 mm
700 mm
NOTE  The 2 500 mm height above the floor given as the minimum distance to live parts applies only in the gangway where it is
possible for persons to stand or walk.
Figure 729.1 – Gangways in installations with live parts on one side
729.410.3.7.2
Where the gangway has live parts on both sides (see Figure 729.2), the minimum distances shall be:
a) width of gangway between live parts 1 300 mm;
b) minimum distance between the front of the handle
and the live parts on the opposite side of the gangway 1 100 mm;
c) minimum free passage in front of controls (handles,
isolation position of circuit breakers, etc.)  900 mm;
d) height of live parts above the floor 2 500 mm.

– 5 – HD 60364-7-729:2009
Live parts
Circuit breaker
in the position
“isolation”
2500 mm
1300 mm
900 mm
1100 mm
1100 mm
NOTE  The 2 500 mm height above the floor given as the minimum distance to live parts applies only in the gangway where it is
possible for persons to stand or walk.
Figure 729.2 – Gangways in installations with live parts on both sides
729.513 Accessibility
Add the following paragraphs:
729.513.2 Requirements for operating and maintenance gangways
The width of gangways and access areas shall be adequate for work, operational access, emergency
access, emergency evacuation and for the movement of equipment.

Gangways shall permit equipment doors or hinged panels to be opened to at least 90° (see also Annex A,
Clause A.1).
729.513.2.1 Restricted access areas where the protective measure of barriers and enclosures
applies
Where the protective measure is provided by barriers or enclosures in accordance with HD 60364-4-41,
the following minimum distances apply (see Figure 729.3):
a) width of gangways with barriers or enclosures between
switch handles and circuit-breakers in position “isolation”
or switch handles and the wall  600 mm;
b) width of gangways between barriers or enclosures
and other barriers or enclosures, or barriers or enclosures
and the wall  700 mm;
c) height of panelling above the floor 2 000 mm;
d) height of live parts above the floor 2 500 mm.

NOTE 1  Where additional workspace is needed e.g. for special switchgear and controlgear assemblies, larger dimensions may be
required.
Live parts
Panelling Barriers or
enclosures
2500 mm
Circuit breaker
in the position
“isolation”
2000 mm
600 mm
600 mm
700 mm
700 mm
700 mm
Figure 729.3 – Gangways in installations where the protective measure of barriers
or enclosures applies
NOTE 2  The above dimensions apply after all parts of the panelling have been mounted and closed and to circuit breakers in the
position ”isolation”.
729.513.2.2  Restricted access areas where the protective measure of obstacles applies
Where the protective measure of obstacles applies in accordance with HD 60364-4-41, the following
minimum distances apply (see Figure 729.4):
a) width of gangway between obstacles and switch handles,
or obstacles and the wall, or switch handles and the wall  700 mm;
b) height of panelling above floor 2 000 mm;
c) height of live parts above the floor 2 500 mm.

– 7 – HD 60364-7-729:2009
Live parts
Panelling
Obstacles
Circuit breaker
in the position
“isolation”
2000 mm
2500 mm
700 mm
700 mm 700 mm
700 mm
Figure 729.4 – Gangways in installations where the protective measure of obstacles applies

NOTE  The above dimensions apply after all parts of the panelling have been mounted and closed and to circuit breakers in the
position ”isolation”.
729.513.2.3 Access of gangways
Gangways longer than 10 m shall be accessible from both ends.
NOTE 1  This may be accomplished by placement of the equipment a minimum of 700 mm from the end walls (see Figure 729.5) or
by providing an access door, if needed, on the opposite end wall.
Closed restricted access areas with a length exceeding 20 m shall be accessible by doors from both
ends.
NOTE 2  For closed restricted access areas with a length exceeding 6 m, accessibility from both ends is recommended.

Figure 729.5 – Examples of positioning of doors in long closed restricted access areas

– 9 – HD 60364-7-729:2009
Annex A
(normative)
Additional requirements for closed restricted access areas

A.1 Evacuation
To permit easy evacuation, the doors of any equipment inside the location shall close in the direction of
the evacuation route. Gangways shall permit equipment doors or hinged panels to be opened to a
minimum of 90° (see Figure 729 A.1).
NOTE  Figures 729 A.1, 729 A.2 and 729 A.3 show the minimum width of gangways and distances for passing in case of
evacuation.
*)  A minimum width of 600 mm lies between the wall and the circuit-breaker in the isolated position.
1)  Circuit-breaker in the isolated position
2)  Handles (e.g. for controls or equipment)
Figure 729 A.1 – Minimum passing width in case of evacuation – Case 1
For doors which can be fixed in the open position or circuit breakers or equipment which are withdrawn
fully for maintenance (position: completely extracted) a minimum distance of 500 mm shall be provided
between the door edge or circuit-breaker/equipment edge and the opposite side of the gangway
(see Figures 729 A.2 and 729 A.3).

NOTE  See Figure 729 A.3 for the minimum passing width in case of circuit-breaker in position: completely extracted.

Evacuation route direction
minimum passing
width 500 mm
*)
*) hinged mounting rack
Figure 729 A.2 – Minimum passing width in case of evacuation – Case 2

Minimum passing
width 500 mm *)
*)  A minimum width gangway of 500 mm shall be provided between the wall and the circuit-breaker in the “completely extracted”
position or the door which has been fixed in the open position.
1)  Completely extracted circuit-breaker
2)  Door fixed in open position
Figure 729 A.3 – Minimum passing width in case of evacuation – Case 3

Doors giving access to gangways in closed restricted access areas shall open outwards (see
Figure 729.5) and they shall have the following minimum dimensions:
– width 700 mm;
– height 2 000 mm.
– 11 – HD 60364-7-729:2009
Annex B
See Annexes ZA and ZB.
Annex C
(informative)
Additional information for closed restricted access areas
C.1 Ventilation and conditioning
Closed restricted access areas should be:
– ventilated with the air being exhausted outdoors (naturally or mechanically), or
– air-conditioned.
NOTE 1  The ventilation is installed in order to prevent introduction of dust in the equipment.
Air conditioning should be used, where necessary, to ensure a suitable temperature is maintained.
NOTE 2  Switchgear and
...