I have done some research on the topic but I have not found any conclusive evidence. I want to design a system where I use the existing cabling inside a building to communicate with various IOT devices using PLC.

I need to make a choice between these two frequency bands; the preferred constraint is distance and robustness (as low noise as possible). Do power lines have a high impedance at higher or low frequencies.

CENELEC-B ranges from 98.44kHz to 121.88kHz and FCC ranges from 154.68kHz to 487.50kHz

Any help is apresisted.

Bonous question and answer:

For G3 (not prime) how many sub-carriers are CENELEC-B and in the FCC band.

CENELEC-B has 16 sub-carriers and FCC has 72 sub-carriers.


1 Answer 1


The CENELEC-B will allow the signal to transmit further but there is greater noise interference due to this property.

With more research, I have found that the frequency band 150KHz up has regulation to keep noise from PSU (SMPS) as low as possible in order to pass EMC testing. but in the CENELEC-B band, there are no such regulations as that is were SMPS are gently active (between 9k to 100K).

Therefore I have chosen the FCC band, even tho the signal propagation will not be as far.


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