Let's keep in mind that the table from EN 55035 (actually from CISPR 35) is
from an Informative Annex and is not a part of the Normative requirements.
That said, it does provide some useful information. The requirement in
CISPR 35 from 80 MHz to 1 GHz is 3 V/m. This provides a reasonable level
Hello All,
I am wondering if the 20 V/m level was borrowed from IEEE C37.90.2, which is
referenced in UL CCN NRGU for Protective Relays. The IEEE C37.90.x series is
one of the industry standards for items associated with protecting and control
of the electrical grid. It does not seem quite
The exposure limits according to the ICNIRP depends on frequency, of course.
>From 1hz to 300hz the Occupational limits are like 20kV/m for E-Field and
40k to 200uT.
>From 3khz to 10Mhz the limit is 170V/m (100uT). For the General Public (up
to 24 hours a day), the limit is 83V/m (27uT).
For
The EM field exposure limits are not always in standards: in Europe they
are in a European Council document based on Commission-funded research
(ICNIRP). I don't recall any limits as low as 10 V/m.
On 2023-07-27 19:07, Richard Nute wrote:
I’m a product safety engineer. This discussion is
Some thirty years ago, the keynote speaker at an IEEE EMC symposium in the USA
was a noted medical researcher working on the long term health effects of
exposure to EM fields (neurological as opposed to simply thermal effects).
In substance, what he said was we evolved to live with certain
I'm a product safety engineer. This discussion is based upon a safety
standard specifying a limit for the accessible electric field strength.
Doug Smith said:
"These days we think 10 V/m is dangerous."
See:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3553569/
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