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 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
