[Amps] Direct rectification of AC mains to derive the amp, VDD, supply

[qrv at kd4e.com]

If you want "sensitive" try the newest breaker technology - mandated in
many places AFCI.

Local contractors say they are so hyper-sensitive they install them for
inspection then replace them with GFI's.

>> the near electrocution you describe was due to several concurrent
>> problems: The short circuit due to a poor solder job, lack of a ground
>
> I know what contributed to the problem, but much of the technology and
> wiring was not available.
>> fault interrupter, and poor grounding of the equipment.
>>
>> If there had been a GFI, it would have tripped as soon as the solder
>
> This was in the late 60s.  I'd never heard of a GFI back then and don't
> think they were available.  Thing is, there are still many homes that do
> not have GFIs.  The only GFIs in this home are those we have installed
> and when you are working with older wiring you are taking a lot on
> faith.  Even after tracing out circuits you have no gurantee that there
> isn't a branch running off somewhere.  Perhaps an infinished project.
>
> Nealy all equipment back then had a 3 wire cord, grounding the case to
> the electrical ground, so the 101B with the 2 wire power cord and no
> ground was an anomaly to most of us.
>
>> blob made a short, as long as the radio was connected to any sort of
>> ground, even a poor one. And if there was no ground at all, the GFI
>> would still have tripped, as soon as you touched that radial wire.
>>
>> This shows how important GFIs are. For anyone who has no particular
>> interest in getting electrocuted because of any stupid little failure,
>> it's imperative to have GFIs on every circuit, even in those countries
>> where they are not yet mandatory.
>>
>> The incident you describe was in the sixties. I don't think GFIs were
>> around back then. But today they are, and they are quite inexpensive
>> (the ones I used in my home cost about 12 dollars each, I have 4 of
>> them). So anyone who wants to prevent such an occurrence, can do so.
>
> I replace the first outlet on a circuit with a GFI which protects the
> entire circuit..."IF" the circuit is properly wired. GFI circuit
> breakers are also available for panel installation, but those are not
> cheap.
>
> My entire shop is wired that way (GFI outlet first on the circuit)
> except for the 240 with all the wiring in surface mounted EMT.
>
> OTOH I have to admit, that I've had two GFI outlets fail.
>
> 73
>
> Roger (K8RI)



-- 

Thanks! & 73, KD4E.com

David Colburn - Nevils, Georgia USA

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