[Elecraft] KPA500 Voltage?

[Lou Mecseri]

Aluminum wiring is "penny wise and pound foolish".
Coming from a retired Fire Investigator.
Good Luck and 73, Lou KE1F


On 11/14/2022 22:08, Lyn Norstad wrote:
> Ed -
>
> I cringe when I think of aluminum wiring.  I know it's currently about half
> the price of copper, but a townhouse I lived in from 1979-1982 in Chicago
> caught fire because of aluminum wiring and copper outlets.  In fact,
> statistics show that 50% of home fires are due to aluminum wiring.
>
> Aluminum does not meet any current (pun by chance ...) building codes around
> here.  It's all copper. Has been for at least 40 years.
>
> If you're stuck with aluminum (and it's legal??), be sure to liberally apply
> antioxidant where needed.
>
> 73
> Lyn, WØLEN
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ed Cole
> Sent: Monday, November 14, 2022 3:43 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KPA500 Voltage?
>
> On the general subject of house wiring, loads, and resulting voltage:
>
> I am wiring my new hamshack with 240vac mains extension from the house.
> I selected three No. 2 awg aluminum lines (copper not commonly used
> these days).  These are approx 1/4-inch diameter.
>
> That is rated for 90A (in general).  Resistance is 0.318 ohms/1000-feet
> so my 120-foot run has 0.0382 ohms.  At 50A this results in a voltage
> drop of 1.9v.  My service voltage is 243VAC.
>
> Estimation of max load at the new hamshack/workshop calculates as 36.5A.
>    Maximum will likely never exist as not everything will be activated
> simultaneously, but good design is for max load.
>
> Largest load is electric baseboard heat (4000w); 50v PS is next (3000w).
> All my QRO amps are LDMOS and run about 2500w dc-input.  I use three of
> these switching PS, but only one at a time.
>
> Info on my website: www.kl7uw.com
>
> 73, Ed - KL7UW
>
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