It is not efficient policing bad devices after the fact. You can have a bad device interfere with RF communications for miles. It then requires dispatching a team of humans with RF probing equipment and escalating to the Feds if the person refuses to comply. It does happen but it is time consuming.
Leaky RF can cause mass events such as https://www.cbc.ca/news/canada/calgary/carstairs-westview-co...
Here's a IEEE Video on the process of interference hunting: https://www.youtube.com/watch?v=elUDfDmIHLs
A short article on how some equipment on a tug boat was interfering with a town: https://www.verizon.com/about/news/verizon-test-force-braves...
And this is the interference hunting that has to happen now with devices certified. It would be an absolute hell if devices could just be introduced willynilly.
Because certifying upfront is cheaper than trying to find products that cause problems in the field, do lots of testing and find somebody and recall all the other products that are in the field
Because people could get hurt or killed in the meantime. See the 737max for example.
Now it is a dramatic example, but think about any device unwillingly emitting too much electromagnetic radiation potentially being harmful to kids or messing with people pacemakers.
Also, didn't the 737max pass certifications?
(I'm on the fence about this; personally I think there need to be far more small company / small production run exemptions from these requirements, but on the other hand I don't want a loophole for recklessly dangerous products)
Not to be confused with the Chinese Export marking: https://www.kimuagroup.com/news/differences-between-ce-and-c...
It doesn't mean that nobody fraudulently puts those markings on devices without a testing certificate backing it. However anybody who puts CE mark on a product without complying is risking being punished by EU member states. As an importer and distributer of such goods you'll be punished as well. CE certification is indeed self disclosed but it doesn't mean that you would get away with noncompliance.
Source: https://www.europarl.europa.eu/doceo/document/P-6-2007-5938-...
The "UKCA" one, on the other hand, is real but tragic.
On the other side: if you forget ventilation in the cabinet, the certified PC might burn... so packaging CE certified components doesn't mean that the whole is risk-free
Yes. This is a significant difference from the US, where FCC compliance testing for modules is much more reasonable.
The US also appears to contract out basic electrical safety to the insurance industry (Underwriter's Laboratories).
Governments today generally don't operate test laboratories, standards organizations, or certification bodies. DIN, ISO, IEC, BSI etc are not government organizations.
You're right, though, that there's more history of insurance industry involvement in developing safety standards and testing in the US.
Ditto Dieselgate.
Doesn't negate the need for testing. Rather, it shows the need for effective oversight.
It's not even necessarily that expensive: $3K-$5K is a good budgetary range if you don't have any pre-compliance test and engineering capability because you might need 2-3 trips to a certified test lab to pass. If you have experience in your product space and good pre-compliance testing, you can definitely be one-and-done for less than that.
(More realistically, you'd just see extremely slow adoption in any important use-case.)