[Elecraft] Breakers for KPA1500

[Jim Brown]

On 7/9/2018 11:29 AM, Josh Fiden wrote:
> I take what code requires as the minimum wire gauge. For shorter runs it's fine. But measure the run length, multiply by 2 (two wires) and calculate IR voltage drop.

Actually, the voltage drop is greater than you calculate with the simple 
formula because current to electronic loads is not a sine wave!  This 
makes Josh's advice even better!  There's a technical discussion of this 
in  http://k9yc.com/GroundingAndAudio.pdf beginning around slide #56.

> It's not a big expense when you're installing to use 10 instead of 12 awg if it would make a noticeable difference.

Yes. The cost of that outlet is mainly labor. I would even consider #10 
small if it's a very long run, and consider #8. And our advice is not 
specific to the KPA1500 -- it would be the same for any big electrical 
load.

73, Jim K9YC