On Mar 8, 3:34 pm, "
wrote:

but it is covered by FCC regulations as "incidental, unintentional
RF radiation" and has limits.

Congratulations on your license, Len.

It is probably best not to mx "unintentional" into that explanation
because under Part 15, "unintentional emitters" are treated
differently than "incidental emitters."

In the US, under Part 15 of the FCC's rules, power lines are
classified as "incidental emitters" -- devices that do not
intentionally generate RF signals inside of them, but that may do so
as an incidental part of their operation. Examples of incidental
emitters are electric motors or the power-line noise sources being
discussed.

Unintentional emitters are devices that do intentionally generate RF
signals internally, but that do not intend to radiate them. Examples
are computers, calculators and most digital devices.

Under the rules, indidental emitters do not have any specific radiated
or conducted emissions limits. The manufacturer of an incidental
emitter has a responsibility to use good engineering practice
(whatever that may be construed to mean) and the operator of the
device must do so in a way that does not cause harmful interference to
licensed radio users.

73,
Ed Hare, W1RFI
ARRL Lab