[AMRadio] 220 volt AC Power Question


gkb gkbrown at gwi.net
Tue Oct 31 04:54:47 EST 2006


My clothes dryer has four prongs.
Regards,
Gary...WZ1M
----- Original Message ----- 
From: "Darrell, WA5VGO" <hbrnut at earthlink.net>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Monday, October 30, 2006 8:40 PM
Subject: Re: [AMRadio] 220 volt AC Power Question


> This does not meet the code. A ground wire can never be used to carry
load.
> Also, your ground wire is probably bare. A neutral conductor must be
insulated.
>
> Darrell, WA5VGO
>
>
>
>
> At 07:09 PM 10/30/2006 -0600, you wrote:
>
>
> >Hi all,
> >
> >    I am building an amplifier that has a combination of 220 volt and 120
> >volt transformers. The HV plate supply is 220V, and the rest is 120V. I
will
> >be keying the plate supply. My 220V outlet has phase, phase, and ground.
> >There is NO neutral. The outlet is not a GFCI outlet so ground current
will
> >work, BUT.
> >
> >   The BUT here is whether this is legal with the National Electric Code?
> >Before you say NO, consider the electric clothes dryer. These all run off
> >220V, and have 3 prong power cords. I have heard that in some dryers
there
> >are 120 volt loads (lights, and timer) as well as 220V (heater and
motor).
> >If this is true, then my approach must be OK so long as my power switch
uses
> >a DPST switch and (double fuses)to insure everything is off when it is in
> >the OFF position.
> >
> >Comments please...
> >
> >BTW, I do have a 240/120 autotransformer of suitable size (VA rating),
but
> >space does not permit it's use.
> >
> >Jim
> >JKO
> >--
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> >
> >
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