ORGANISATION OF THE IEC TC 31

ORGANISATION OF THE IEC TC 31

In addition to the 13 Working Groups (WG), 3 Project Teams (PT), 12 Maintenance Teams (MT), 3 Joint Working Groups (JWG), and 1 Adhoc Group (AHG), the IEC TC 31 is divided into 3 Subcommittees (SC) with a similar organisational structure as the superordinate TC 31:

• SC 31G               Intrinsically-safe apparatus

• SC 31J                Classification of hazardous areas and installation requirements

• SC 31M               Non-electrical equipment and protective systems for explosive atmospheres

While the Project Teams and Maintenance Teams have a vertical structure, i.e. each one deals with creating and/or updating just one standard, Working Groups, Adhoc Groups and Joint Working Groups have a horizontal organisation, i.e. their work covers multiple standards. This means that one Working Group is involved in establishing and updating several or all IEC standards. Adhoc Groups are only set up for certain special topics and are often either disbanded after a few meetings or converted into a Working Group.Joint Working Groups generally work with members of other TCs.

The designation PT and MT is therefore used according to the standard they are dealing with. By contrast, WG, AHG and JWG are numbered consecutively.