[RFI] Trying to locate the Part 15 compliance note...

Hare, Ed W1RFI w1rfi at arrl.org
Wed Mar 13 16:21:38 EDT 2019

Those regulations all apply to emissions from the device. In the US, with very few exceptions, there are no FCC rules regarding immunity.

This now-out-of-print-but-wisely-archived FCC document may help:


See the CIB Interference Handbook and look for the statement about non-radio devices improperly functioning as radio receivers.


-----Original Message-----
From: RFI <rfi-bounces at contesting.com> On Behalf Of David Eckhardt
Sent: Friday, February 22, 2019 2:41 PM
To: Dave Cole (NK7Z) <dave at nk7z.net>
Cc: Rfi List <rfi at contesting.com>
Subject: Re: [RFI] Trying to locate the Part 15 compliance note...

There likely wo't be a statement.  Home appliances are specifically exempt from FCC rules of any kind.  15.103(d) will be difficult to force into this case where it arcs when an amateur transmits.

§ 15.103 Exempted devices.

The following devices are subject only to the general conditions of operation <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
in §§ 15.5 <https://www.law.cornell.edu/cfr/text/47/15.5> and 15.29 and are exempt from the specific technical standards and other requirements contained in this part. The operator of the exempted device shall be required to stop operating the device upon a finding by the Commission or its representative that the device is causing harmful interference <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=5d78fa6c752a5326f26a026c51cd5136&term_occur=2&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>.
shall not resume until the condition causing the harmful interference <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=5d78fa6c752a5326f26a026c51cd5136&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
has been corrected. Although not mandatory, it is strongly recommended that the manufacturer of an exempted device endeavor to have the device meet the specific technical standards in this part.

(a) A digital device
utilized exclusively in any transportation vehicle including motor vehicles and aircraft.

(b) A digital device
used exclusively as an electronic control or power system utilized by a public utility or in an industrial plant. The term public utility includes equipment only to the extent that it is in a dedicated building or large room owned or leased by the utility and does not extend to equipment installed in a subscriber's facility.

(c) A digital device
used exclusively as industrial, commercial, or medical test equipment <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=441f0834af528658594b49e1da1a6c03&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>.

(d) A digital device
utilized exclusively in an appliance, e.g., microwave oven, dishwasher, clothes dryer, air conditioner (central or window), etc.

(e) Specialized medical digital devices
(generally used at the direction of or under the supervision of a licensed health care practitioner) whether used in a patient's home or a health care facility. Non-specialized medical devices, i.e., devices marketed through retail channels for use by the general public, are not exempted. This exemption also does not apply to digital devices <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=6&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
used for record keeping or any purpose not directly connected with medical treatment.

(f)Digital devices
that have a power consumption not exceeding 6 nW.

(g) Joystick controllers or similar devices, such as a mouse, used with digital devices <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=8&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
but which contain only non-digital circuitry or a simple circuit to convert the signal to the format required (e.g., an integrated circuit for analog to digital conversion) are viewed as passive add-on devices, not themselves directly subject to the technical standards or the equipment authorization requirements.

(h)Digital devices
in which both the highest frequency generated and the highest frequency used are less than 1.705 MHz and which do not operate from the AC power lines or contain provisions for operation <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=3&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
while connected to the AC power lines. Digital devices <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=10&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
that include, or make provision for the use of, battery eliminators, AC adaptors or battery chargers which permit operation <https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=4&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
while charging or that connect to the AC power lines indirectly, obtaining their power through another device which is connected to the AC power lines, do not fall under this exemption.

(i) Responsible parties should note that equipment containing more than one device is not exempt from the technical standards in this part unless all of the devices in the equipment meet the criteria for exemption. If only one of the included devices qualifies for exemption, the remainder of the equipment must comply with any applicable regulations. If a device performs more than one function and all of those functions do not meet the criteria for exemption, the device does not qualify for inclusion under the exemptions.

On Fri, Feb 22, 2019 at 3:32 AM Dave Cole (NK7Z) <dave at nk7z.net> wrote:

> Hi,
> I have an interesting RFI issue happening.  My neighbors oven is 
> acting up when I transmit.  It looks like the oven is taking RF in via 
> the power lines.  In our discussions, part 15 compliance came up.  I 
> have offered to have an electrician install some ferrite material on 
> the power lines, and pay for it, but they want to pursue with GE as 
> they indicated they may get a replacement stove...  Anyway...
> I have the model number for the stove, it is a GE Signature Cafe model 
> number C2S985SET9SS.
> After downloading the manual, the installation information, and the 
> users guide, I can not locate a Part 15 compliance note anywhere...  
> Can someone help my locate this?
> --
> 73s and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> Award Manager, 30MDG Grid Awards
> ARRL Technical Specialist
> ARRL Volunteer Examiner
> ARRL OOC for Oregon
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
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