International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 61666:1997
Title Industrial systems, installations and equipment and industrial products - Identification of terminals within a system
Project Number 8163
Abstract/Scope Provides rules for the designation of terminals of objects within a system for use in the electrotechnical and related areas. Applicable to all technical areas.


Current Stage code 6060
Current Stage code date 1997-06-03
Current Stage code deadline 1998-02-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 3
Reference Document IEC 61666:1997 (EQV)
ICS 01.080.30 - Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation
29.120.20 - Connecting devices
Keywords Industrial installation; Industrial product
Note EN following parallel vote * Superseded by EN 61666:2010
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 1997-06-03 1998-02-01 export to doc file  EN
5099 1997-03-11 1997-04-11  
5062 1997-01-23 1997-03-11  
5020 1996-10-18 1996-12-31  
1090 1996-10-17 1997-02-17  

Implementation Dates

date of Ratification (DOR) (1) 1997-03-11
date of Availability (DAV) (2) 1997-06-03
date of Announcement (DOA) (3) 1997-08-01
date of Publication (DOP) (4) 1998-02-01
date of Withdrawal (DOW) (5) 1998-02-01


(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.