Difference between revisions of "Common symbols around you"
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<br style="clear:both">[[File:Bunch on european certifications.png|thumb|right|Bunch on european certifications]] | <br style="clear:both">[[File:Bunch on european certifications.png|thumb|right|Bunch on european certifications]] | ||
You'll note that some of them are country-specific. There are many more country-specific testing centers. | You'll note that some of them are country-specific. There are many more country-specific testing centers. | ||
| + | and may deal with additional health and/or safety and/or environmental concerns. | ||
You're probably used to the ones applying to your part of the world. | You're probably used to the ones applying to your part of the world. | ||
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| − | For things like power supplies it's not uncommon to see | + | For things like power supplies it's not uncommon to see ''many'' certification marks, |
| − | e.g. when a large company that has locked down the design so that they can mass produce | + | for practical reasons: e.g. when a large company that has locked down the design so that they can mass produce it, |
| − | it for worldwide sale without a lot of new certification. | + | for worldwide sale, without a lot of new certification (certifcation is slow and sort of expensive). |
| − | <br style="clear:both">[[File:CE and CE.png|thumb|69px|right|CE Mark and Chinese Export]] There are also a bunch of fake symbols | + | <br style="clear:both">[[File:CE and CE.png|thumb|69px|right|CE Mark and Chinese Export]] There are also a bunch of fake symbols. |
| − | Often with different, tighter spacing (though some real CE products sometimes do this too for spacing reasons). | + | Best known among them is the "chinese export", a nickname of chinese producers stamping the european CE mark. |
| + | Often with different, tighter spacing {{comment|(though some real CE products sometimes do this too for spacing reasons)}}. | ||
<br style="clear:both"> | <br style="clear:both"> | ||
Revision as of 15:03, 9 November 2019
Uses, safety
Indoor use only
double insulated, a.k.a. Class II
Dispose as electronics
Switch-mode, Linear, general/unspecified power supply
Hot surface
"Independent lighting auxiliary" [1] roughly meaning "lighting power supply not built into the luminaire"
Power supply
The top symbol is for DC barrel plugs, specifying whether the inside or outside is positie.
The middle line is input, where the squiggly tilde ~ indicates AC.
The third line (output)'s solid and dotted line indicates DC.
isolating, safety isolating; non-short-circuit proof, short-circuit proof
separating transformer, output >1kV, variable, constant voltage, perturbation attenuating
Double circle, like a vertical venn diagram, are transformers, with a handful of properties marked. There are more combinations of all the parts this image shows, and further ones (e.g. construction site).
Certifications
Some of the more commonly seen logos / certification bodies include:
UL (United States)
BSI, also Kitemark (UK)
TUV (Europe and North America)
VDE (Germany)
GS (Germany/Europe)
CE (Europe)
CE (Australia)
PSE (Japan)
CCC (China)
You'll note that some of them are country-specific. There are many more country-specific testing centers. and may deal with additional health and/or safety and/or environmental concerns. You're probably used to the ones applying to your part of the world.
In most places these are not required for sale, but for both safety and insurance reasons they are a good idea for both you and retailers.
For things like power supplies it's not uncommon to see many certification marks,
for practical reasons: e.g. when a large company that has locked down the design so that they can mass produce it,
for worldwide sale, without a lot of new certification (certifcation is slow and sort of expensive).
Best known among them is the "chinese export", a nickname of chinese producers stamping the european CE mark. Often with different, tighter spacing (though some real CE products sometimes do this too for spacing reasons).
Related
A bunch of the above are settled in ISO 7000 / IEC 60417, which also have a lot of markings used around mechanisms, indicatons, and buttons, around cars, audio, production lines.
See https://www.iso.org/obp/ui#iso:pub:PUB400008:en
IP ratings for water and object safety
Unsorted
https://hackaday.com/2018/02/02/what-are-those-hieroglyphics-on-your-laptop-charger/
Consumables
