It's important to understand that these safety codes are LOCAL --
usually by state, but also by county and/or city. There are "guideline"
codes, like the National Electric Code, that are adopted by most local
authorities, and those guideline codes are updated every few years.
Often the local code (which is the Law) is years behind.
California law DOES require smoke detectors. I don't know enough about
the law to know the limitations on type. The ones we have are
stand-alone, running on a standard replaceable battery.
73, Jim K9YC
On 10/29/2020 7:14 PM, Hank wrote:
We switched to wireless alarm connected, internal battery detectors due to the
occasional RFI interference caused by running a little power on 80 meters. Our
alarm company actually had some experience with RFI issues and made the
recommendation. I installed them and have a calendar reminder to swap the
batteries every fall when the time changes.
Local fire code does not require detectors. Insurance folks give us a break on
rates for having them - wired or otherwise here in Ga.
Hank
K4HYJ
On Oct 29, 2020, at 5:36 PM, Jim Brown <j...@audiosystemsgroup.com> wrote:
Most RFI to/from ham radio and "devices" is caused by poorly designed
electronics using interconnected wiring as TX/RX antennas. Because of the frequencies on
which they operate, WiFi-connected devices with no exterior wiring are inherently FAR
less likely to create or receive RFI IF they operate on internal batteries. If running
from the AC line or a switching power supply (wall wart, wall lump, etc.) the PSU will
almost certainly create RFI noise and wiring both on the AC and DC side will radiate it.
Bottom line -- choose stand-alone devices with internal batteries and no
external wiring for minimum RFI.
In your situation, I would try one of them before returning them.
73, Jim K9YC
On 10/29/2020 12:57 PM, Harlan Sherriff via Elecraft wrote:
Dave, I totally agree. I am sure the “problem” the manufacturer is cautioning
about is RF, since my original post was about “wireless connected” detectors.
My gripe was nothing in the sales literature warned against it. Not till I
bought the units and read the installation guide
Sent from my iPhone
On Oct 29, 2020, at 3:51 PM, Dave B via Elecraft<elecraft@mailman.qth.net>
wrote:
Well, RF (AKA "Radio Waves") can falsely trigger all sorts of equipment
that was not "designed" to work with, or be influenced by them.
That is the classic EMC Susceptibility or Immunity problem. Basically,
poor design and/or implementation of the affected (or sometimes bad
installation of an otherwise good) device.
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