Codes & Standards - Purchase
a) Clause 8 in the previous edition is moved to Clause 4;
b) Mandatory requirement for the line width in symbol originals is changed to 2 mm or 4 mm (see 6th paragraph of 7.3);
c) For negation of a graphical symbol, a single diagonal bar is allowed in addition to two diagonal bars at right angles;
d) A new meaning of negation do not is allowed;
e) Some freedom is given for use of the basic pattern such as for symbol originals to be within the 75 mm square instead of the octagon;
f) Annex A (normative) is newly introduced for provisions on title, description and notes;
g) The nature of notes is changed to be purely informative; and
h) Clause 10 in the previous edition is moved to Annex C (informative).
It has the status of a horizontal standard in accordance with IEC Guide 108. This International Standard has been prepared in co-operation with ISO/TC145/SC 3. It is published as a double logo standard.