IEC TS 62966-3-2021 Mechanical structures for electrical and electronic equipment – Aisle containment for it cabinets – Part 3: Aspects of operational and personal safety.
This part of IEC 62966 defines the requirements for operational and personal safety of aisle containments for IT cabinets.
The aim is to provide physical security for the IT equipment installed in the containment using the criteria “availability” and “safety”.
The requirements apply to all operational, working and maintenance procedures.
This document does not apply to ordinary persons, when using installations and equipment.
The requirements described herein are also intended to ensure that it is possible for authorized personnel to enter and remain in the containment (as accessible equipment) and to maintain or upgrade the systems installed in the containment without risk. It should also be possible to evacuate the containment quickly and safely at any time, especially in the event of a fire or any other hazardous situation, whilst reducing the health risk to personnel to a minimum.
Aspects relating to computing, data processing, data storage, building protection or the data centre itself do not fall within the scope of this document. Only those additional aspects arising from the integration of an aisle containment are considered.
The design and positioning of an aisle containment, which is integrated in the data centre, has influence on the following different aspects of operational safety:
a) escape and evacuation plans;
b) escape routes;
c) emergency exits;
d) functional aspects of escape doors;
e) lighting conditions
f) lighting and signposting of escape routes;
g) fire protection.
In this document, these operational safety requirements and recommendations are considered.
To achieve the highest effectiveness, all these requirements are considered as much as possible during the design of an aisle containment.
This document applies to normal operations, not to the initial installation of the containment.
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 60695-1 1 -1 0, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and vertical flame test methods
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
• ISO Online browsing platform: available at
3.1 escape route
intended route to a place of safety
3.2 emergency exit
exit which is part of an escape route and leads directly to the outside or to a safe area
3.3 escape and evacuation plan
straightforward and comprehensible document that provides information relating to escape routes and fire fighting equipment
3.4 escape door
every door in an escape route is an escape door
3.5 hold time
time during which a concentration of fire extinguishant shall be maintained at an effective level within the space being protected. The predicted hold time shall be determined by the door fan test or a full discharge test.IEC TS 62966-3 pdf download.