For years, I've used the same or similar table for dissimilar metals and
the possibility of corrosion for "pairs of common metals in use". This
table shows up in many IEC based standards and no one I know questions the
validity. I got curious as to the source and why this particular list of
I think reference of ISO 3864 would be pertinent – I don’t have an anywhere
near current copy to-hand, but this Wikipedia page outlines the subparts of
that standard and give the basic requirements for defining the meaning of a
symbol by its colour. https://en.wikipedia.org/wiki/ISO_3864
We went through this recently with one of our products and our NRTL was
explicit that the having the blue color “was critical.”
Matthew Varas
Electrical Engineer
WR Medical Electronics Co
1700 Gervais Avenue | Maplewood, MN 55109 | U.S.A.
Cell: 763.222.6900
Office: 651.604.8473
I would use ISO 7010-M002.
The blue colour denotes that the action shown by the pictogram is mandatory. I
would not change it to black unless you have no other option, i.e., you’re
moulding the symbol into a black plastic case.
Doug Nix
d...@ieee.org
+1 (519) 729-5704
> On 5-Feb-21, at 10:23,
I was asked what symbol should be used on a piece of equipment, where the EN
61010-1 safety standard applies, to denote 'read the instructions for use'?
Prior just some English wording was used but a symbol would be better as the
equipment may be used within the EU.
It is not clear to me
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