IEC 60079-11:2011/COR1:2012

IEC 60079-11 CEI 60079-11
(Sixth edition – 2011) (Sixième édition – 2011)

Explosive atmospheres – Atmosphères explosives –

Part 11: Equipment protection by intrinsic Partie 11: Protection de l’équipement par
safety “I” sécurité intrinsèque « i »

CO RRI G E NDUM 1
Changes to the French version appear further in the document.
Table 1 – Applicability of specific clauses of IEC 60079-0
Replace existing row 26.4.4 by the following new row:
26.4.4 26.4.4 Acceptance criteria Applies Applies Excluded except
when 6.1.2.3a)
is applied
Table 3 – Temperature classification of tracks on printed circuit boards (in a maximum
ambient temperature of 40 °C)
Replace the eighth footnote by the following new footnote:
At terminations of components dissipating 0,25 W or more either normally or under fault conditions, and for
1,00 mm along the conductor, either multiply the track width by 3 or divide the maximum current specified by 2.
Additionally, if the track goes under the component, apply the factor specified for tracks passing under components
dissipating 0,25W or more.
Figure 1 – Separation of intrinsically safe and non-intrinsically safe terminals

Replace the drawing in Figure 1b by the following drawing:

T T
d3
d1 d2
I.S. I.S. Non I.S.
Circuit Circuit Circuit
d4
IEC  001/12
8.2.3 Transformer construction
Replace the existing fourth paragraph by the following new paragraph:
January 2012 Janvier 2012
For type 2 construction, the windings shall be wound one over another with either

a) solid insulation in accordance with Table 5 between the windings, or

b) an earthed screen (made of copper foil) between the windings or an equivalent wire

winding (wire screen). The thickness of the copper foil or the wire screen shall be in

accordance with Table 6.
12.1 General
Replace the existing fifth and sixth paragraphs by the following new paragraphs:

In the case of apparatus meeting the requirements of 6.1.2.3 a), the IP rating shall be marked.
In the case of apparatus meeting the requirements of 6.1.2.3 c), the certificate number shall
include the “X” suffix in accordance with the marking requirements of IEC 60079-0 and the
specific conditions of use listed on the certificate shall detail the requirements.
Replace the existing eighth paragraph by the following new paragraph:
Where it is necessary to protect the apparatus from external physical impact in order to
prevent the impact energy of 10.7 exceeding the specified values, details of the requirements
shall be specified as special conditions for safe use and the certificate number shall include
the “X” suffix in accordance with the marking requirements of IEC 60079-0 and the specific
conditions of use listed on the certificate shall detail the requirements.

Figure D.3a – Moulding over un-mounted components
Replace the existing drawing by the following new drawing:

IEC  002/12
Figure G.1 – Typical system
Replace the existing drawing by the following new drawing:

January 2012 Janvier 2012
U
U
I
H a z a r d o u s a r e a N o n - h a z a r d o u s a r e a

IEC  003/12
...