>
>I think what Rich means is 8-3 or 6-3. Either is overkill unless you have an
>extremely long run.
When one uses a resonant-choke filtered supply, I agree. With a
capacitor filter, the peak current is 10x higher. This is a whole nuther
ball game. When I used to tune up the Plywood Box with a 30pps tuning
pulser, my wife could hear the #4 copper vibrating in the attic. My
neighbor told Edison that his porch light blinked. When I first fired
up the Plywood Box, I had an additional 1000v of anode supply drop
because I used code-approved #6 copper. #4 copper was the fix.
> But to be safe you might want to consider 8-3 over 10-3.
This is hardly a safety issue.
cheers, Ed W3NR
>
>-----Original Message-----
>From: measures <2@vc.net>
>To: Eric Moore <emoore@windemullerelectric.com>; Paul Christensen
><paulc@mediaone.net>; AMPS <amps@contesting.com>
To: <amps@contesting.com>
>Date: Tuesday, November 14, 2000 6:34 PM
>Subject: Re: [AMPS] 240VAC Amplifier Wiring
>
>
>>
>>>
>>>Hello Paul,
>>>
>>>I am an Electrical Engineer for a large Electrical contractor in Michigan.
>>>We don't do much Residential, but I think I can help you out. See
>comments
>>>interspersed below:
>>>
>>>>As I begin to add a 240VAC power drop to my radio shack at the new QTH, I
>>>>began to consider cable sizing, connectorization and grounding issues.
>At
>>>my >previous home, I used #10/3 CU cabling for a total distance of 60-feet
>>>to my >Alpha 77Dx (single tube). I then terminated the drop into a
>Hubbell
>>>30-amp >Twist-Lock receptacle. I then began thinking about various 240VAC
>>>distribution >possibilities:
>>>
>>>The 10/3 is fine if your circuit draws less than 30Amps.
>>
>>10-3 is not fine for capacitor filter supplies that draw an indicated
>>30a. The problem is that peak current is 8 - 10 times higher than
>>indicated current. My advice is to use 10-8 or even 10 - 6 for long
>>runs.
>>- Rich..., 805.386.3734, www.vcnet.com/measures.
>>end
>>
>>
>>--
>>FAQ on WWW: http://www.contesting.com/FAQ/amps
>>Submissions: amps@contesting.com
>>Administrative requests: amps-REQUEST@contesting.com
>>Problems: owner-amps@contesting.com
>>
>
>
>--
>FAQ on WWW: http://www.contesting.com/FAQ/amps
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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