[AMRadio] 220 volt AC Power Question


david knepper collinsradio at adelphia.net
Tue Oct 31 06:38:01 EST 2006


Did anyone ever think of calling a local electrician!

Dave, W3ST
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----- Original Message ----- 
From: "gkb" <gkbrown at gwi.net>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Tuesday, October 31, 2006 4:54 AM
Subject: Re: [AMRadio] 220 volt AC Power Question


> 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
>> >--
>> >No virus found in this outgoing message.
>> >Checked by AVG Free Edition.
>> >
>> >
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>>
>>
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>>
>> -- 
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> 10/30/2006
>>
>>
>
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