[SunRescue] 690mp & 240VAC

[jcarverjcarver at ipns.com]

Nick,

Just looked at my setup. (100 year old house, several remodels) the
ground
for the Oven/Range is connected at the ground bus in the panel and to a 
screw inside the metal receptacle. Plug itself is only 3 prongs. However
new convection oven with digital controls uses 4 prong plug with ground
wired thru to oven itself.

				jim

nick at snowman.net wrote:
> 
> Yeah, I belive that is correct, but you'd need a RMS meter.  The problem
> with a "standard converter" is most ovens/motors/dryers/etc don't care
> about ground, and so have phase-1, phase-2, and neutral.  No
> ground.  Almost all computers/electronics/etc have Phase-1, Phase-2,
> Neutral, and most important Ground.
>         Nick
> 
> On Fri, 20 Oct 2000, Stefan Skoglund wrote:
> 
> > If i understand the american electric system it is 2-phase 110 V phase
> > to neutral ? and 240 V phase to phase ?
> > Measured with a standard volt-meter.
> >
> > "Jason J. W. Williams" wrote:
> > >
> > > It turns out I do have an industrial plug behind the oven, so I might look
> > > for a convertor cord or make my own. We'll see. Though I was under the
> >
> > Take the pre-made converter !!!
> > Dont do your own if you arent 100% sure about your knowledge.
> >
> > > understanding that the box was coming with a dual plug setup, such that I
> > > could take up two standard sockets.
> >
> > Which will only work if the sockets have different phase ie
> > you will get 0 V of difference ie both sockets is the same phase !
> > or 240 V if it is the same phase.
> >
> >
> > Strong admonition: i'm a repair tech with speciality
> > heating pumps (is that the proper term ?`) ie like a fridge.
> > Yesterday one of these babies had a bad short.
> > The main on-off switch was molten.
> > That switch is a standard 3-phase switch.
> > The total electric effect in the pump is 16Kw ie easily 12 Amps
> > at 220 V per phase.
> >
> > The short was between two phases and the heat was big enough
> > to melt the insulation on some nearby wires.
> >
> > So: in short doing electrical work without knowing your stuff is
> > asking for problems ie FIRES!!
> >
> > _______________________________________________
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> >
> 
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