Only the FCC logo is REQUIRED to be on the device if it is Class B, home
and small office. The statement and other regulatory information, more
times than not, is contained in the 'User's Manual'. Most have a
regulatory section devoted to this kind of stuff. If there is no FCC logo
on the product, assume it is either Class A (Industrial) or the supplier
doesn't know much about the regulatory world and required markings (no
attehtion to EMC/RFI). This is based on some 30 years of doing EMC/RFI for
a living. What I write is from experience. When we had a real FCC, things
were very different!!!!
If it is from China or the PacRim, just assume it has not been tested nor
any attention paid to EMC/RFI. I have read many,.....many,.....bogus
'reports' on Chinese products, many of which are assembled from other
products and piece mealed from other reports and really don't even apply.
I've also experiencef many, . . . . many, . . . . . instances of false
labeling from China.
Bottom line: 1) When you shop for something, take a battery operated
radio with you and request a test of the item.
2) It's hard to find otherwise, but don't buy if the
electronics or products are 'Made in China".
3) Don't buy if in the inttruction manual or posted on
the product, "Made of Foreign and Domestic Parts". That's a
license for Chinese switchers with, again, no
attentioin paid to EMC/RFI.
However, the biggies like Apple and the like know the game and are usually
to be trusted (except for their wall warts).
I realize all this reads rather negative, but its reality these days! Just
believe me ! ! !
Dave - WØLEV
On Tue, Mar 20, 2018 at 7:40 PM, Leonard Halvorsen <lhalvors@pppl.gov>
wrote:
> Has everyone come to the same conclusion...
> "*...**IF* you can find them." ???
>
> [RFI] LED Bulb noise Eleta E12
>
> I read a while ago that to avoid, or at least mitigate to great extent,
> interference, an RF noise source must meet FCC standards for a "Class B"
> device. What I read stated it was defined in Part 17 (it seems to be Part
> 15 instead; possibly a typo) of the FCC rules, but I found many references
> to it in this *official* 120-page pdf document
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=
> 0ahUKEwjgprG4lLPZAhVHulMKHQF5AQQQFggoMAA&url=https%3A%2F%
> 2Fwww.gpo.gov%2Ffdsys%2Fpkg%2FCFR-2009-title47-vol1%2Fpdf%
> 2FCFR-2009-title47-vol1-part15.pdf&usg=AOvVaw1Op9mrNNvD_YdVp_5mAmKU>.
> This passage on page 23 states what manufacturers must put on such
> devices..
>
> (b) For a Class B digital device or peripheral,
> the instructions furnished the
> user shall include the following or
> similar statement, placed in a prominent
> location in the text of the manual:
>
> NOTE: This equipment has been tested and
> found to comply with the limits for a Class
> B digital device, pursuant to part 15 of the
> FCC Rules. These limits are designed to provide
> reasonable protection against harmful
> interference in a residential installation.
> This equipment generates, uses and can radiate
> radio frequency energy and, if not installed
> and used in accordance with the instructions,
> may cause harmful interference
> to radio communications. However, there is
> no guarantee that interference will not occur
> in a particular installation. If this equipment
> does cause harmful interference to
> radio or television reception, which can be
> determined by turning the equipment off and
> on, the user is encouraged to try to correct
> the interference by one or more of the following
> measures:
> —Reorient or relocate the receiving antenna.
> —Increase the separation between the equipment
> and receiver.
> —Connect the equipment into an outlet on a
> circuit different from that to which the receiver
> is connected.
> —Consult the dealer or an experienced radio/
> TV technician for help.
>
> I tried to locate devices that adhered to this at places like Home Depot
> and Lowes, but was unsuccessful.
>
> This 7-page pdf document
> <https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=
> 0ahUKEwjSsf7jl7PZAhWStlkKHQtWCB0QFggyMAA&url=https%3A%2F%
> 2Fwww.cableorganizer.com%2Fimages%2Fkensington%
> 2Fmicrosaver-alarm-lock%2FFCC-rules.pdf&usg=AOvVaw2kXOZ71VpqTqByfN3bb6HO>
> attempts to abbreviate and interpret the legalese above. In it is this
> passage on page two...
>
> Two levels of radiation and conducted emissions limits for unintentional
> radiators are specified in FCC Part 15 Subpart B.
>
> The two levels are Class A digital devices, the higher less strict limits,
> and Class B digital devices, the lower more strict limits.
>
> Manufacturers are encouraged to meet the Class B digital device limits.
>
>
>
> So, *the key* seems to be to find devices that meet "Class B" standards ...
> *IF* you can find them.
> If they are made someplace in the Far East, that is probably impossible.
> Compliance costs are probably too high, and most people probably don't
> care.
> And if you can find them, they are probably expensive.
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
--
*Dave - WØLEV*
*Just Let Darwin Work*
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