Is the following interpretation of clauses within section 15.103 of Title 47
of the FCC regs valid? 
The interpretation suggests that ANY digital electronic control used in an
industrial plant is exempt from the specific requirements.
Or does the exemption apply only to electronic control systems used within
public utilities?

"The following devices are subject only to
the general conditions of operation contained in Sections 15.5 [this is
a requirement that the device does not cause harmful interference in
use, and is the responsibility of the user] and 15.29 [this states that
the Commission may ask the user for information on the operation of the
device, and may request a sample device from the manufacturer or
importer] and are exempt from the specific technical standards and other
requirements contained in this part."  Section 15.103(b) lists as an
exempted device, "A digital device used exclusively as an electronic
control or power system utilized by a public utility or in an industrial
plant."
Thanks
Ian Gordon




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