[sdiy] iec connector confusion

[Barry Klein]

Back to the original question, it sounded like you did not know for sure
what N and L inputs were on the supply itself and whether it mattered.
The discussion has been centering on the AC cord side...  if instead you 
do not understand the pinout of the supply and it is not documented, maybe
an ohm meter test to ground can determine the neutral line?

I agree, it is better to look for one or more wallwarts or bricks that have 
2 input power cords.  Also look for UL, CE, LPS (twin rectangle) marks on
the label.  Ideally an EnergyStar IV symbol (soon to change to V).  These
supplies are switchers with isolated AC from DC output.  The unit can be
plugged into ac either way.  Get one 100V-240V and it can run anywhere.

The 3 conductor (N,L,gnd) supply approach depends on correct AC cord/plug
wiring for safety.

Barry


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of ASSI
Sent: Tuesday, October 28, 2008 9:25 AM
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] iec connector confusion

On Dienstag 28 Oktober 2008, Dan Snazelle wrote:
> i want to make sure this machine is safe. And as i am still
> soldering and connecting but need power to test at this stage, i
> was planning on installing the PSU in the case and then working
> around it. So i dont want to accidentaly touch the AC tabs (120
> volts) by mistake and get thrown across the room.

You should protect yourself against faults and stupidity alike (the 
latter is probably responsible for the majority of accidents).  Since 
you are actually taking responsibility for the safety of others by 
building equipment, you should really aquire the knowledge on how to 
do it correctly or always have someone check it who is qualified to 
do so.  It is usually a much better idea to use isolated, earth-free 
PSU for audio equipment anyway.  If you are really going to poke 
around a live PSU with pointy metal objects, do yourself and your 
family a favor and use at least a GFCI (max. 30mA) in front of all 
mains operated equipment reachable from your workspace and always 
test it before doing any work.  Covering the terminals and any 
prominent openings in the case during work is also a good idea, you 
really don't want any wire clippings falling into a PSU.  Also, have 
someone qualified test if the rest of the installation in your home 
is correctly done, otherwise you might think you are safe when you 
actually aren't.


Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk]>+

SD adaptation for Waldorf microQ V2.22R2:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada

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