TS EN 80416-1

TS EN 80416-1 is the standard that sets out the basic principles for preparing graphical symbols for registration and for building the basic drawings used on equipment. Its focus is not the meaning of a single symbol itself, but the common method for defining, presenting, and organising a symbol so it can be recorded and used consistently.

Common structure for registered graphical symbols

The standard gives principles and rules for preparing a symbol title, description, and necessary notes. In general technical practice, graphical symbols are used to communicate functions, states, warnings, directions, or operating information without relying on text. For that reason, consistency in line width, basic pattern, negation, and symbol layout is important for legibility and for comparing symbols across equipment types and languages.

Main technical changes in this edition

• The mandatory line width for symbol originals was changed to 2 mm or 4 mm.
• A single diagonal bar is now permitted for negation, in addition to two diagonal bars at right angles.
• A new meaning of negation, 'do not', is allowed, and some additional freedom is given for using the basic pattern within a 75 mm square.
• A new normative Annex A was introduced for provisions on title, description and notes, and notes are now purely informative.

Its status as a horizontal standard means the symbol-design principles are intended as a cross-cutting reference rather than a rule limited to one narrow equipment category. Within the IEC 80416 series, this part provides the foundational framework that supports consistent symbol creation and registration across technical contexts.