[Elecraft] Breakers for KPA1500?

[Bob McGraw K4TAX]

For the 240 volt service to my operating position, I have a total run of 
75 ft from the breaker panel to the amp outlet.   I installed #10 - 3  
w/ground with a dual 20A breaker in the panel. Even though most of the 
run is in the attic,  90ºC rating is adequate in as much as it is not in 
conduit.  If installed in conduit, it must be derated.  When you put 
Romex inside conduit the Romex cannot breathe and retains too much heat. 
Hence the reason for derating.

73

Bob, K4TAX


On 7/9/2018 7:40 PM, Jim Brown wrote:
> On 7/9/2018 12:26 PM, Bob McGraw K4TAX wrote:
>> I would also suggest using three -  #10 with ground as the line from 
>> the breakers to the amp operating position. 
>
> Not only a suggestion -- it's the law! Electrical Codes carry the 
> force of law, and they require that the equipment ground must 1) run 
> with the current carrying conductors and 2) must be no smaller than 
> the largest conductor.
>
> 73, Jim K9YC
>
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