[Elecraft] Question about 120 volts vs. 240 volts house supply to KPA 500

[Jim Brown]

Excellent design and execution, Bob. Everything about your logic is 100% 
correct.

73, Jim K9YC

On 9/20/2024 9:09 AM, Bob McGraw wrote:
> I elected to install a 240 volt 20 amp service to my operating 
> position.  I used some 75 ft of #10-3 w/ground (4 wires) running from 
> the breaker panel to the operation position.  I split off a 120 volt 
> service from L1, and a second 120 volt service from L2. Thus there is 
> also a 240 volt service, L1 + L2,  for the amp or any amp, past and 
> present.  Thus everything in the station shares a common Neutral and 
> common Ground.  Many issues are resolved using this approach.   Besides, 
> our house was wired with those stab on outlets, of which I have had to 
> replace many due to poor connections.
> 
> Yes I know that #10 is rated for a 30 amp service. Due to the length of 
> the run from the breaker panel to the desk, I choose a larger gauge of 
> wire to assure less voltage drop.  Besides, crawling through the attic 
> pulling a #10-3 is the same effort as pulling a #12-3.  At the breaker 
> panel, the service is protected by 2 individual 20 amp breakers.  I did 
> not use a ganged 2 pole breaker.
> 
> No ground issues, no hum issues, no buzz issues and no RFI issues.