Posted Tue Dec 28, 2010, 11:20pm Subject: Re: Electrical question - wire gauge, amps, and heat?
Thanks for everything folks. In investigating further I find that one of the quick connect terminals on the fuse holder was nonstandard: much too thin for the female quick connect terminals. It was really designed for soldering. That looseness would likely have contributed to the resistance increase and heat. I have ordered a replacement from Mouser. I am also replacing the wiring from power to fuse to power switch with 12 gauge wire just in case.
While I was ordering from Mouser, I also ordered a small DC fan to install in the housing to try moving some cooler air around in the case. It will be powered by a wall wart. I don't want to suck a lot of dust and debris in to the case, so I may have to investigate filters too...
I also am looking into moving the fan speed control to after the transformer.
Thanks for all the suggestions and advice!
Dana Leighton - Espresso hack and CoffeeGeek moderator
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