Why are radiated emissions standards for consumer electronics different from industrial?

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  • \$\begingroup\$ Do you have source for that image? \$\endgroup\$
    – Voltage Spike
    Aug 13, 2020 at 19:59
  • \$\begingroup\$ Probably because consumers aren't running enormous plants with lots of heavy equipment everywhere so they need a bit more leeway. \$\endgroup\$
    – DKNguyen
    Aug 13, 2020 at 20:11

2 Answers 2


Because consumers have more devices like TV's and radios and they are more susceptible to noise than industrial or commercial equipment (and more likely to complain). Industrial environments are especially noisy (especially any with large switching voltages or large power feeds). This makes it easier for me to pass FCC standards with the products I make because I register them as class A.


The emission limits for Class B devices are about 10 dB more restrictive than those for Class A devices since they are more likely to be located closer to radio and television receivers.
Source: https://en.wikipedia.org/wiki/Title_47_CFR_Part_15

  • \$\begingroup\$ >>> (and more likely to complain) THIS Add to it, the consumer device limits in Europe are even more restrictive, presumably because residences are more closely packed together than in the US \$\endgroup\$
    – Kyle B
    Aug 13, 2020 at 20:34

Industrial equipment costs more and has the luxury of higher cost EMI protection immunity when needed. They can also tolerate alternative solutions to relocate the expected high noise environments of unintentional radiation away from receivers or visa versa. Home dwellers are less likely to have these professional solutions.

Consider also arc welders don’t have any emission requirements and are very noisy but contained inside metal wall structures when required.


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