[Amps] Fw: Source for plate xfrmer

Tue Feb 14 11:02:18 PST 2012

On 2/14/2012 1:04 PM, Carl wrote:
>
>> There are no 4 prong outlets in my house so I guess I am doomed and also
>> damned as Im not going to rewire anything but the new appliance when and
>> if I need it.
I put in a new kitchen range. The old one had a 3 wire feed. The new 
one, or course had 3 wires plus ground.
A 3 wire outlet plus a ground will work, as long as you don't have to 
get it inspected.  Most 3 wire outlets have the box grounded, so you 
install a 4 prong outlet with the 4th going to ground.  There are  a lot 
of 220 lines out there consisting of B,W,G, and bare. Course if you have 
B,W, and bare...unfortunately.

It's easier to run another circuit in our house (ranch style with 
basement) than it is in the shop where everything runs in conduit.  Out 
there I gotta make a 240 run the full length of the shop. Panel to 
ceiling, cross over two other runs, then the length of the ceiling, and 
down to the rotary phase converter (contactor, push button switches, and 
emergency stop)  There's a run within 3 feet of it, but it's already 
powering both my 80 gallon air compressor and final amp.  I really need 
to run a second one for the amp.

73

Roger (K8RI)

>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "Al Kozakiewicz"<akozak at hourglass.com>
>> To:<TexasRF at aol.com>;<km1h at jeremy.mv.com>;<ranchorobbo at gmail.com>;
>> <steve at dx4win.com>
>> Cc:<amps at contesting.com>
>> Sent: Tuesday, February 14, 2012 11:08 AM
>> Subject: RE: [Amps] Source for plate xfrmer
>>
>>
>> First off, NEC codes end at the outlet.  An amp is an "appliance" and
>> would be covered by UL, which is entirely optional.  There is nothing that
>> forbids such a practice - an electric range is a good example as the overn
>> elements are typically 240v, while the burners, controls and lamps are
>> 120v.
>>
>> The issue is that a range uses a 4 prong outlet - 2 x hot, neutral and
>> ground, while your typical amp/AC outlet is missing the neutral.  You may
>> NOT connect your fan between a hot and the chassis ground, even though it
>> would be electrically rational.  If the safety ground failed, the chassis
>> would then be at 120v with respect to ground.
>>
>> Al
>> AB2ZY
>>
>> ________________________________________
>> From: amps-bounces at contesting.com [amps-bounces at contesting.com] On Behalf
>> Of TexasRF at aol.com [TexasRF at aol.com]
>> Sent: Tuesday, February 14, 2012 10:54 AM
>> To: km1h at jeremy.mv.com; ranchorobbo at gmail.com; steve at dx4win.com
>> Cc: amps at contesting.com
>> Subject: Re: [Amps] Source for plate xfrmer
>>
>> I guess there is some electrical code that forbids connecting the 120vac
>> blower between one side of the 240ac line and neutral?
>>
>> I hope this doesn't start another round of ground vs neutral wiring  sins.
>>
>> 73,
>> Gerald K5GW
>>
>>
>>
>>
>>
>>
>>
>> In a message dated 2/14/2012 9:41:22 A.M. Central Standard Time,
>> km1h at jeremy.mv.com writes:
>>
>> You can  get more benefit with primary taps and not bothering with a pair
>> of
>> 120V  windings; use a seperate 120V line for blowers, LV supplies,  etc.
>>
>> Tapping the secondary limits your KVA as you go to lower voltages  and who
>> the heck needs a CT in a big  amp?
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From:  "Rob Atkinson"<ranchorobbo at gmail.com>
>> To: "Steve Bookout"<steve at dx4win.com>
>> Cc:<amps at contesting.com>
>> Sent: Monday,  February 13, 2012 10:10 PM
>> Subject: Re: [Amps] Source for plate  xfrmer
>>
>>
>>> In addition EPD makes a good product but plan on  spending at least
>>> $400, perhaps more.
>>>
>>>   http://epd-inc.com/
>>>
>>> How much are you prepared to  spend?   Because of the price of copper
>>> any custom plate  iron you get that has some muscle is going to
>>> probably cost some  coin.  More if you want it potted and several taps.
>>> Even if you  don't need them if you are paying for a custom job it's a
>>> good idea to  get a CT on the secondary and of course one on the
>>> primary, plus a few  more taps on the secondary.   You may decide 4.25
>>> KV DC with  a cap input filter is a bit high, or if not, extra taps
>>> afford  different supply voltages and increase the versatility of the
>>>   transformer and its resale value if you ever decide to let it  go.
>>>
>>> 73
>>>
>>> Rob
>>> K5UJ
>>>
>>> On  Mon, Feb 13, 2012 at 12:35 PM, Steve Bookout<steve at dx4win.com>
>> wrote:
>>>> Hello all,
>>>>
>>>> Where do you look for a  new HV plate transformer these days?
>>>>
>>>> I understand  Peter Dahl is no longer around.
>>>>
>>>> I'm looking for 3000  VAC secondary @ 1+ amp CCS.
>>>>
>>>>   TIA
>>>>
>>>> 73 de Steve, NR4M
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