[sdiy] should I connect the plug ground to the transformerground?

[harry]

HowD Atom (et al)

In prectice I agree with Atom here... what will really happen in most cases
is that if there is a bad fault... the fault current (15-20A) will follow the
audio cables instead until it can find a place that HAS a safety ground...

This may trash other gear as well... OTOH you have a good chance of
having a MUCH quieter system without all those ground connections.

I suggest two alternatives...
1: Use "cheater" plugs  (3 wire to 2 wire) on the AC cord instead of cutting
the wire internally.  You can opt in or out of the more safe connection as needed.

2: Make a special extension cable.  I have one with 12 gauge AC cable, and i
bolted
2 4"x4" utility boxes together... so I have 8 good solid outlets on the same
cord...
with all the grounds tied at that point.  Plug ALL your gear into that one strip
and you
will usually be quiet as a mouse. The ground wire problem is most evident whan you

plug into outlets across the room.  If I need to cross the room... I plug the
extension into that common point.

H^)  harry

This is USA 120VAC advise.  Get another opinion for 240 (europe)


Atom 'Smasher' wrote:

> > Last couple of Power supply's I build I just attached the plug ground to the
> > transformer chassis, but the one I have now doesn't have one,
> >
> > so do I leave it floating or should I connect it to the 0V output of the
> > secondary?
> ===============================
>
> this thread could get big.... i know every time i get a new [used] synth,
> if it hums, i open it up, and cut the green wire, of the AC.
>
> i'm sure there's a theory that states i'll be electrocuted, but it always
> works fine.
>
> this is on a system where the mains wiring is bug-free.
>
>         ...atom
>
> ----------------Void-If-Detached----------------
> http://smasher.suspicious.org/fs1r  Yamaha FS1R
>
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