IEC Document Designation 

By on

Often document control is dictated by project requirements, for example a particular organisation may have an existing numbering system. Existing company or group/department document control systems may also be employed. In the absence of any agreed document control, it is recommended that the system detailed in IEC 61355 be followed.

IEC 61355 Document Designation

The IEC 61355 standard provides rules and guidelines for the classification of documents based on their characteristic content for all technical areas which are in use during the life cycle of a plant, system or equipment.

document - fixed and structured amount of information intended for human perception that can be managed and interchanged as a unit between users and systems

DCC - document classification code

A document designation combines a designation of the object to which the document is assigned and the DCC together with a counting number. The document counting number has no meaning other than to differentiate different documents. In addition, this document designation may be supplemented by a page counting number.

 

IEC61355DocumentDesignation

 

The object designation shall unambiguously specify the object to which a document is assigned. This implies that an object designation shall be (or be made) unambiguous in a specified context. The DDC consists of the prefix sign "&" (ampersand) followed by a code consisting of three letters:

· A1 - letter code for technical area
· A2 - represents class level A2
· A3 - represents class level A3

The page counting number is optional. It shall be separated from the document designation part by the character "/" (solidus), which may be omitted if no confusion is likely (or example when the page counting number is shown in a separate section in the title block ).

It should be noted that within any particular organisation, it is not necessary to implement the full document designation.  In particular the DDC could be incorporated as part of an existing document numbering scheme.

IEC 61355 Data Base

The IEC maintain an up to date (and evolving) online database of DDC designations:

IEC 61355 Online Database - as of May 2012, the database did allow free pubic access

The database lists Application Areas (A1 in the DDC) and Activity Areas (A2A3 in the DDC).  In order to facility finding the correct DDC, the database allows searching for documents and listing in different formats (by application area, activity area, presentation form, etc.).

Example – to find a DDC for a single line diagram you can search the data base by application area. For electrical engineering the application area (A1) is identified as 'E'.  Expanding the list and selecting overview diagrams, show the activity area (A2A3) as 'FA'.  The description and examples confirm this is the correct designation to be applied to Single Line Diagrams.  The full DDC is then EFA.

See Also

IEC Reference Designations – Opinion post on object designations



Steven McFadyen's avatar Steven McFadyen

Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author

myElectrical Engineering

comments powered by Disqus



Star-Delta Motor Starting - Performance

Many questions sent in to the site are in connection with motor starting and in particular star-delta.  For all but the simplest application, there is...

GE's Shingijutsu Factory

GE's latest thinking on product manufacturing is he Shingijutsu philosophy or Lean production system. They have started applying this at the Louisville...

Back to Basics - Ohm’s Law

Electrical engineering has a multitude of laws and theorems. It is fair to say the Ohm's Law is one of the more widely known; it not the most known. Developed...

Understanding Motor Duty Rating

One of the comments on my Motor Starting Series was asking for something on duty cycles. Here it is. As a purchaser of a motor, you have responsibility...

Lead Acid Batteries

Lead acid batteries are cost effect and reliable, making them suitable for many applications.This note examines topics of interest associated with the...

E-Ink

Before the technical, some general information. E-ink display are found in a lot of e-readers, some mobile phones and similar devices and the intent is...

Closed Doors

"I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong...

Calculating Cable Fault Ratings

When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...

Autonomous Vehicle Challenge

Two driverless and solar power vans have departed from Italy on their way to China via the silk road. During the 13,000 kM trip the vans will drive themselves...

Are We Losing Professional Integrity

I have been thinking recently that there appears to be less professional integrity around than when I first started my career in electrical engineering...

Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note